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EvolOne
10-25-2003, 07:11 PM
OK Guyz and Galz, you have aftermarket exhaust systems...

TurboBacks are the most productive...And there's opinions plenty about which is designed best.

Help out EvolOne by telling him which YOU think is best and WHY!!!

There are too many that I can't get them all.

Down pipe, Butt pipe, Tootite pipe, cat-, axel-, turbo-back...

Which is the best and why...And does your favorite have a sensor bung?

Rob2

leaveit2bevo
10-26-2003, 01:07 AM
Um get a hks down pipe and cat back from Rob(coolguy949) sounds dope and looks great (I have carbon ti cat back)

drmosh
10-26-2003, 01:44 AM
HKS is only 2.65", not practical if you plan to go bigger turbo... just a word of caution...

MrBubbler
10-30-2003, 05:11 PM
how about JIC only leave out the best!

Coolguy949
11-03-2003, 11:55 AM
how about JIC only leave out the best!

Poll options updated...

BOVBILLY
11-03-2003, 03:35 PM
SPUGEN, is the way for me. If you have ever or know anyone who as and S2000, they will know the name of Spugen!

3" cat back, real 3" w/an APEXi N1 muffler! It is 100% Mandrel bent steel. $550.00 installed!

PM me and I will give you all the Info. There shop is in Whittier off Whittier Blvd.

Ricardon
11-03-2003, 08:28 PM
Hmmmmm. A very delicate subject indeed! I think it depends entirely on what you plan to do with your EVO really. If you want to win shows and have something that makes a little more power than stock you go after the HKS or the JIC. I was drooling when I first saw Rob's and Robert's (oh wait his is still stock right...wink wink) carbon TI's a few months ago. The JIC titanium can looks just as nice IMO. Now, if you want to win races go with Borla, AVO, or RMR. They don't have any of the bling bling as their JDM counterparts (they don't look awful though either hehe), but they do produce way more power, and strangely enough, usually cost a lot less. Borla is a household name when it comes to exhaust systems, and have MANY championships across the board in motorsports. AVO, most haven't heard of them unless you owned or payed close attention to the subie world. They've been producing EVO parts for years though, and kicking absolute tail in motorsports. Sounds...Borla=very bassy, very low frequency, very "I'm going to mash you into small little bits". RMR=more of a lower growl that isn't too blatant, but sounds purposeful. AVO=hahahaha, what sound? The catback by itself sounds soooo close to stock it will scare you. Think sleeper! there is absolutely no db increase over stock. Add the AVO downpipe, and it's only 10% over stock. They do this because they are geared more towards racing and expect most to use a test pipe, so they wanted to keep db levels at least semi-legal. My bias is towards performance so I have more info/experience in that area, but others want looks. Six of one, half a dozen of the other, it all depends on what's important to you, there isn't really a right or wrong. Sorry for the long post, I'm not trying to SELL any of these, I just like the topic!

Ricardon
11-03-2003, 08:39 PM
Oh forgot to mention I've seen a bone stock EVO with only the AVO turbo-back (downpipe+catback using stock cat) put up consistent 50 peak gains. For $1200 total...that's tough to beat. Obviously I haven't dyno'd the Borla on my car yet...after SEMA!

leaveit2bevo
11-07-2003, 11:25 AM
In the new import racer they did a power page on evo 8. The avo cat back netted them 35 hp!!!! but when they put on the downpipe it only gave them 2 more hp and 7 more tq. So their avo turbo back really only got them 37hp and 21 tq.

drmosh
11-07-2003, 04:28 PM
In the new import racer they did a power page on evo 8. The avo cat back netted them 35 hp!!!! but when they put on the downpipe it only gave them 2 more hp and 7 more tq. So their avo turbo back really only got them 37hp and 21 tq.

35 hp with a cat back?? Are you reading that correctly? Or did they remove the cat?

leaveit2bevo
11-07-2003, 05:42 PM
nope im reading it correctly, but thats at a certain rpm range the total peak hp was 22 with the cat back.

Ricardon
11-07-2003, 08:25 PM
Dino...yeah, the catback is that good. I think they have a monopoly on speed LOL. No, seriously, the AVO is a monster product! Just got my Borla put on today...I have to say that I am very, very impressed. The difference is unreal, whereas the difference with most other catbacks by themselves in not as noticeable (excluding the avo of course hehe) Can't wait to get it on the dyno and see the numbers. I do find it odd however, that IR wasn't able to pull higher numbers. But c'mon 37 is rediculous even still!!

MrBubbler
11-07-2003, 08:26 PM
i still think the JIC has the least amount of bends in it which would make it flow alot better then anything else ive seen, if anyone doesnt belive me hit me up you can check out mine = P

drmosh
11-07-2003, 08:30 PM
That AVO catback cost like almost 1000 bucks... maybe I'll go have one custom fabbed, might be cheaper!

EvolOne
11-07-2003, 11:29 PM
With all this catshit back costing somewhere around a grand for that....

I'm gonna spring for a dog-forward...Have a bit more bite than bark...Unlike the Borla... Which I hear -- hear what? I can't hear any longer -- is so loud as to made a sound system pointless.

Not that driving an evo gives one much time to listen to tunes.

Ok. I'm losing it.

I'm getting an AVO unless I change to an RMR.

Anyone seen the RMR catshit-back rated by an independent tester?

Bevol? You seen anything?

Dog tired. pant-pant.

SuPaNooK
11-08-2003, 04:29 AM
yea...anyone seen any RMR dyno numbers?

Coolguy949
11-08-2003, 07:52 PM
Just got back from SEMA. Saw the B&B in person with Dyno sheets and everything. Looks like a promising product and very well engineered. I am working on opening an account with them so I'll be selling B&B very soon!

EvolOne
11-08-2003, 09:08 PM
Just got back from SEMA. Saw the B&B in person with Dyno sheets and everything. Looks like a promising product and very well engineered. I am working on opening an account with them so I'll be selling B&B very soon!

They have had a very good reputation and are ??? reasonably priced.

What did you learn about them, if I may know.

IS2000
11-08-2003, 09:46 PM
yea...anyone seen any RMR dyno numbers?

I gained 35 awhp with RMR catback, DP, Ultimate Racing 3" cat, and K&N panel filter.
So I guess the exhaust was good for 31 hp, since the drop-in gave 4 whp on the other EVO.

SuPaNooK
11-09-2003, 03:06 AM
so RMR is 35awhp?
and AVO is supposively 35~50??
hmm...
price on the RMR?

EvolOne
11-09-2003, 11:59 AM
Suggest you check out the brainstorm site.

I could be wrong, but I believe Roshon's dyno numbers / charts look revised to me.

The AVO catback doesn't show the gains that were in the recent ?? Bevis what mag was it? ... looks more like twenty with catback...

R2

perversity
11-09-2003, 01:10 PM
I've been following the exhaust thread on evolutionm.net and they still haven't posted dyno #s for the products. I am also trying to decide what to get. Does anyone have dyno #s for any of the exhausts other than the AVO (which seems to be on a major publicity kick right now). I am particularly interested in the HKS and the RMR. Thanks!!!!!!

leaveit2bevo
11-09-2003, 01:21 PM
aight here it is the info youve all waited for, I best be getting some road head from one of you for typing all this shit. :P

This is on the brainstorm dyno:

Evo baseline was: peak hp 236.0 and peak tq was 239.0

With the avo catback: peak hp 254.8 and peak tq 253.4
2000-3500 hp average 18-20 000-3500 TQ average 25-33
3500-5500 hp average 2-15 3500-5500 tq average 2-17
5500-redline hp average 2-30 5500-redline TQ average 2-30

with the ave turbo downpipe(combined with the avo catback):

peak hp 256.0 and peak TQ 260.2

2000-3500 HP average 2-5
3500-5500 HP average 2-15
5500-redline HP average --2-8 (looks like a minus 2 in the mag)

2000-3500 TQ average 10-15
3500-5500 TQ average 2-20
5500-redline TQ average --3-9(looks like a minus 3 in the mag)

well there it is for everbody Ive heard that these make 50hp but dosent look like it here. This was from import tuner, ya I know their a gay mag but hey they had evo power pages.

SuPaNooK
11-09-2003, 05:16 PM
dont usually trust mags...only trust what people dyno themselves...
mag #'s are usually wrong anywayz...esp the 1/4 mile times they had for a few cars...its like...wtf???

Ricardon
11-09-2003, 11:28 PM
2 things...1-The AVO system will blow your mind and 2-anyone that doubts the Borla system is more than welcome to come out to the racetrack and let me kick the absolute shit out of you on my otherwise stock car.
-I'm a believer in AVO because I've seen the dyno pulls in person, and I've driven it on the street. I'm a believer in the borla system because I just got back from the track a couple of hours ago, and it made more of a difference than I care to describe. I'm tired, I'm sorry for being so cranky. Yeah, the Borla is fucking loud, but I have a very high tolerance for this stuff and I don't give a shit if it lowers my laptimes. I never listen to the stereo anyway, I'm always listening to what's going on with the car, so I could care less if I have to blast it to hear anything. Tires will make just as much noise as this exhaust will (really stiff-walled grippy tires that is). Do whatever ou guys want, but I love the Borla and if I ever do replace it...it'll be another borla or an AVO, I won't even consider anything else. JIC blows for my application...period.

perversity
11-10-2003, 10:45 AM
Ricrdon,

Do you have a dyno sheet for the Borla?

Ricardon
11-10-2003, 05:42 PM
no dyno sheets yet! Will be at the track tomorrow...again!!!! And hopefully we'll be able to dyno it on wednesday or thursday, I'll post as soon as i get the numbers!

perversity
11-10-2003, 06:16 PM
Have fun at the track tomorrow. I am extremely jealous, but for one reason or another (I think you know why) I can't take my evo out there tomorrow.

Chris in SD
11-11-2003, 05:10 PM
As far as RMR dyno numbers go, mine are a little tainted since I didn't just do the exhaust in one shot. Here goes:

Base: 222 whp
With RMR intake and DP: 250 whp
With DP, intake and ECU: 278 whp
With DP, intake, ECU, cat-back: 300 whp
With DP, intake, intake pipe, I/C pipe, ECU, cat-back: 310 whp

If I had to guess, I'd say the DP/CB makes about 35 hp or so. I guess this because I know the ECU took advantage of the airflow...

Chris

EvolOne
11-11-2003, 05:54 PM
OK, Number be numbers.

I splurged and got the AVO catback today. Very clean install.

For a finicky guy, its not LOUD, but makes its presence known once on throttle. Seems to have shifted powerband a little higher in RPM. Like / loves more RPM than did without.

Hey, what do I know. So I went up Latigo Canyon, and had a great time, with my stock catback pipe banging me in the head every hard right hander. Rich, I know why you love latigo. There was no body there, and I was quite legal, ahem...,

But the AVO sounds good, not too loud, looks good, and I sense more power. Downpipe is next. Roshon says ECU is the key with a wider open exhaust.

This follows the Vishnu theory, and that is open the exhaust system and then retune the ECU.

I've got the bug.

I don't want drone. There is a mild growl at higher speeds, but not bad.

R2

ReHeat
11-11-2003, 06:12 PM
Hehe Rob2, you drove an hour down from SB just to go on Latigo? That's cool! Post some pics of your new exhaust!

han74j
11-12-2003, 08:28 PM
in this months important tuner it fetures a avo upgrade sytem total gain: 23.6 hp 29.5 TQ
avo 3in exhaust 18.8 hp 13.5 tq
avo downpipe 1.2 hp 6.8 tq
avo intercooler 3.6 hp 9.2 tq

i have the pages scaned but dont know how to post pictures with the postreplys so when i learn how ill post those up too

han74j
11-12-2003, 08:45 PM
hahaha leaveit2bevo already posted the same numbers but i gues now u have the intercooler #s also

Ricardon
11-14-2003, 12:39 AM
Like I said before, the numbers are off a little on the AVO products. I've seen gains of over 40hp with the full turbo back, and that's WITHOUT the intercooler. I don't know what's up with IT's numbers, I was at brainstorm for over 3 hours today watching Mark's car being tuned but forgot to ask Roshan what the deal with the numbers was...DOH!

EvolOne
11-14-2003, 10:28 PM
Like I said before, the numbers are off a little on the AVO products. I've seen gains of over 40hp with the full turbo back, and that's WITHOUT the intercooler. I don't know what's up with IT's numbers, I was at brainstorm for over 3 hours today watching Mark's car being tuned but forgot to ask Roshan what the deal with the numbers was...DOH!

The AVO, I'm sold on. The sound is glorious, but not LOUD. Very pleasant, nice tone. Going to get the downpipe too. I THINK there is more power.

Oh, where was I?? The exhaust. I'll take some photos and post them when I stop long enough to do so. The stainless is not as light as Ti, but it feels very strong, robust, fits perfect. And if you're not looking for ulitimate lightness, or loudness, it's great. You get on it and it sounds superb. Brainstorm is a very nice place to work with too.

I'd recommend Roshon any day of the week. He doesn't try to sell you anything. He just gives facts and lets you make the decisions. VEry nice.

R2

MrBubbler
11-15-2003, 07:58 PM
dam you should have hit me up i drive that those canyons atleast once a week seeing their like 10min away = P

Cr0mster
11-25-2003, 06:41 PM
Is the Db level on the AVO beyond legal limits?

leaveit2bevo
11-25-2003, 06:53 PM
Is the Db level on the AVO beyond legal limits?

Who cares? show those UPS trucks whose boss!!!!!! I think it is within leagal limits though.

Coolguy949
11-25-2003, 07:27 PM
i thnk 96db is the limit

EvolOne
11-25-2003, 07:27 PM
Is the Db level on the AVO beyond legal limits?

I have no numbers or measurement on the AVO, but I can tell you from personal experience that it is not much louder than stock. It is simply pleasantly growly. And when you get on it it is noticible, but not window breaking.

My opinion? I'm a sensitive guy, not liking noise. It gives power but will never get you a noise ticket. But stomp it to the floor and you'll get satisfaction.. Ro2

Cr0mster
11-25-2003, 07:33 PM
Cool. I am not to worried about the sound level for myself. I used to ride a bike with a full race pipe on it so I can handle that. I just don't want to have to make a trip to a inspection center anytime soon should I get one.

GokuSSJ4
12-02-2003, 06:49 PM
AVO seems like a great exhaust , and there are plnety gains that you can see . But just the fact that you can not run a highflow 3' cat and also it tappers to 2.5 ' to be able to run it with a stock bolt on , is not for me ..
Im looking for an exhaust that will be from the downpipe all the way to the muffler 3' . Even if it requires to run a highflow cat (which i think it can benefit ) Im seeing if im able to run the BR turbo back with a HKS muffler (hi-power) , im sure it shouldnt be as loud as with the BR muffler ...

EvolOne
12-02-2003, 08:33 PM
AVO seems like a great exhaust , and there are plnety gains that you can see . But just the fact that you can not run a highflow 3' cat and also it tappers to 2.5 ' to be able to run it with a stock bolt on , is not for me ..
Im looking for an exhaust that will be from the downpipe all the way to the muffler 3' . Even if it requires to run a highflow cat (which i think it can benefit ) Im seeing if im able to run the BR turbo back with a HKS muffler (hi-power) , im sure it shouldnt be as loud as with the BR muffler ...

I need to confirm this myself, but I believe the AVO can be hooked up to a full 3" cat or testpipe. I believe the flange -- heck I did see them -- fit the 2.5 or 3", and will not restrict if a full 3" cat is installed. Someone on a forum suggested custom cutting the existing cat flanges, if your cat-oriented, and replacing with 3". Internal size on factory cat is, i believe 3", it's just the flanges.

I should and will ask Roshon about this. R2

Coolguy949
12-02-2003, 08:48 PM
I mentioned cutting the exiting flanges on the cat, but thinking about it now, I dont think it's a good idea. It's a pretty hefty fine if you're found to me modifying your cat i hear. you're better off just buying HF cat.. I dont know though how anyone would find out you even have a modified cat since smog shops arent allowed to touch your cat.

GokuSSJ4
12-02-2003, 10:25 PM
But that still doesnt take the fact that the AVO tappers to 2.5' from the cat back , to the DP . I rather have an exhaust that is 3' all the way. An for the amount that you pay for the AVO is not even worth it modifying IMO..

koolmits
12-03-2003, 04:11 PM
5Zigen is absolutely the best in looks and sound . Its got a wonderful pissed off bulldog sound , kinda rotaryish . After 4k rpm , it really sings . Wait 5Zigen isn't listed :(

Coolguy949
12-03-2003, 04:13 PM
Wait til you hear my exhaust on Sunday.... :)

koolmits
12-03-2003, 04:53 PM
a small sound byte of the 5Zigen
http://www.clant.com/htm/bmw03.mpg

kaisho99
12-03-2003, 05:13 PM
Wait til you hear my exhaust on Sunday.... :)

Did you go AVO?? Dyin to hear one of those in person.

Coolguy949
12-03-2003, 06:06 PM
Nope, not AVO...fully custom...

EvolOne will have his evo there with the AVO exhaust. I do carry AVO now BTW. I posted about it in classifieds.

leaveit2bevo
12-03-2003, 06:34 PM
a small sound byte of the 5Zigen
http://www.clant.com/htm/bmw03.mpg

LOL that link took me to a porn site!!!!!!!!!!

GokuSSJ4
12-03-2003, 06:39 PM
Nope, not AVO...fully custom...

EvolOne will have his evo there with the AVO exhaust. I do carry AVO now BTW. I posted about it in classifieds.

i want to see your set up , now im putting everything in hold till i see you guys set up...

leaveit2bevo
12-03-2003, 06:41 PM
I think APS is coming out with an exhaust soon.But the avo has been known to put down 50hp with the turbo back exhaust.

EvolOne
12-03-2003, 07:35 PM
I think APS is coming out with an exhaust soon.But the avo has been known to put down 50hp with the turbo back exhaust.

Well.... http://www.turboperformance.net/bsp/

I believe that APS has a turboback available. If you synch with Roshon, he says the APS is a little less finished, less well-built, is noisier, and so on. One might wonder if Roshon likes AVO cuz it brings greater profit margin??? Dunno. But youcheck the Australian and other sites, and they all prefer AVO over APS.

But if you're looking for loud, then APS is the way. You want more subtle power and growl, I'm for the AVO. But then that's what I bought after research up the butt.

R2

GokuSSJ4
12-05-2003, 10:01 PM
Went you did your search did you consider getting also a 3' highflow cat ? or thats something that you new you werent going to deal with . I want a systme that can be quiet and have great gains . I really like the BR turbo back but i have heard plenty of people say is to loud with the BR exhaust . Im sure AVO is nice and quiet but just the fact that tappers (not just the cat back but also the DP ) it attends to be an issue to me IMO . I have been looking at the RnR-Racing in SD . Which looks great and is not loud and also has a great price tag compare with other turbo back s out there ...

gt40
12-06-2003, 01:02 AM
Borla custom exhaust:

I took a custom downpipe for the gt40 turbo, added a borla muffler delete pipe to replace the cat As the borla was too loud without the cat, I added a dynomax resonator. Then I hacked the pipe just before the rear muffler and added a flange so I can swap out the rear borla for a MUFFLER DELETE pipe for track days when I run c16 and another map on the aem ems.

Now I have a straight as a board full 3" exhaust without any reductions that flows and am adding a dynomax rear muffler on a flange so I can have a choice of quiet(dynomax), loud(borla) and really really loud(straight pipe)... 3 bolts and its changed.

I will post dyno differences between them after Roshon gets the dyno back on line...

GokuSSJ4
12-10-2003, 09:48 AM
there as so many options , my 1st would be BR but the exhaust is to loud ( and i don't really car for magnaflow or ultraflow) Theres also RnR they say it compares as loud wise to the magnaflow and that has made up too 30whp . But i havent hear any one's feed back on the RnR. It sure is a bargain since for 799.00 you are able to get a full turbo back 3' SS exhaust with a highflow 3' cat.

leaveit2bevo
12-10-2003, 11:45 AM
I think it all depends on what you really want. If you want the best looking exhaust no one can disagree its the HKS carbon Ti, but it does tapper to the cat (which is already very high flowing) I think the loudest is the borla and apparently the AVO makes the most power, and who knows about the aps.

EvolOne
12-10-2003, 09:01 PM
I think it all depends on what you really want. If you want the best looking exhaust no one can disagree its the HKS carbon Ti, but it does tapper to the cat (which is already very high flowing) I think the loudest is the borla and apparently the AVO makes the most power, and who knows about the aps.

Not wanting NOISY power, I love my AVO. Roshon was great.

Kinda reminds me of the old Triumph/Alpha Romeo exhaust sounds of the late 60's machines. Maybe a bit louder. I'll do a sound clip. R2

G20
12-15-2003, 04:28 PM
I'm one of the first that got AVO turbo-back from BrainStorm and very please with it. It fixed perfect, excellent quality, and sound great when WOT. It's much quieter than my prior RMR turbo-back and I like the stock-looking straigh tip than RMR angle-out tip. The RMR sounds great as well but louder. Both fell stronger with my 'butt' dyno but I was only able to dyno with the AVO which gains me about 32 HP from BrainStorm dyno.<br>
I sold RMR to a member of EvolutionM.net and he like it a lot too. I'm going to get the APS 330 HP upgrade without their turbo-back so keeping the AVO. I hope I'll able to get some good numbers after that and let you know. Have a good day guys.

CarbonFibre
12-15-2003, 10:03 PM
Hey, I'm new here and just got interested in this whole world because a good friend of mine just recently bought an EVO. I didn't read every single post in this thread so excuse me if I ask something that's been answered already. Why isn't Vishnu listed there? (My best guess is that one of the above choices manufactures their exhaust.) I also have a choice to add to the list which is the Milltek full 3" system. Milltek is highly regarded in exhaust tuning, especially for European cars, so their EVO exhaust couldn't be half bad.
http://www.milltek.co.uk/
http://www.milltek.co.uk/images/large/evoviii.jpg
http://www.milltek.co.uk/images/large/evo8_system.jpg

ItsStockOfficer
12-15-2003, 11:24 PM
Hey, I'm new here and just got interested in this whole world because a good friend of mine just recently bought an EVO. I didn't read every single post in this thread so excuse me if I ask something that's been answered already. Why isn't Vishnu listed there? (My best guess is that one of the above choices manufactures their exhaust.) I also have a choice to add to the list which is the Milltek full 3" system. Milltek is highly regarded in exhaust tuning, especially for European cars, so their EVO exhaust couldn't be half bad.
http://www.milltek.co.uk/
http://www.milltek.co.uk/images/large/evoviii.jpg
http://www.milltek.co.uk/images/large/evo8_system.jpg

Probably because Vishnu is really overpriced, and no exhaust is worth the cost.

AD_LIB
12-16-2003, 02:58 AM
What is everyones feeling about the 3" hi-flow CAT? I was going to go this route..but cause cali is so GOD DAMN strict with emissions I didnt want to mess with the cat and then fail the inevitable smog test imposed when i get pulled over...which is also inevitable. I mean is there anything out there that is worth a sh*t thats CARB cert?

GokuSSJ4
12-16-2003, 10:13 AM
as long as the cat is for obd II you should be fine , especially in cali this is a must . I know there some shops that include a cat but is not OBD II which is a bit price compare to a regular cat or to a previous years.

My choice end it up being HKS hi- power custom 3' turbo back . I can feel the pull and a bit early spool up . Also great power at top end . It flows a lot better . An the exhaust is super quiet , not loud at all . Like HKS products, of course the judge to all of this is the dyno . Which i will as soon as Roschon has his up and running . I expect to be near mid 260whp , but will see .

ItsStockOfficer
12-16-2003, 07:14 PM
What is everyones feeling about the 3" hi-flow CAT? I was going to go this route..but cause cali is so GOD DAMN strict with emissions I didnt want to mess with the cat and then fail the inevitable smog test imposed when i get pulled over...which is also inevitable. I mean is there anything out there that is worth a sh*t thats CARB cert?

I had a high flow cat and went to a test pipe when I was running mid 12's at 110-111 mph and there was no difference in power really. not on the butt dyno and not in the slips.

GokuSSJ4
12-17-2003, 10:49 AM
which cat do you run ?? also do you know if its an OBD II cat ???

ItsStockOfficer
12-17-2003, 12:30 PM
Mine was a catco, I doubt it was oBDII, I have never heard of a difference, and I don't see

A. How they could tell

B. What it would do differently

Care to to into a bit more detail about it? I know some new cats get up to temp faster, but aside from that I don't know of any thing different.

GokuSSJ4
12-18-2003, 10:41 PM
i believe thats what makes the difference is the temp that they reach , im sure visual wise they can not tell apart . I need to make more research to explain what are the complete difference on the cats . But being in cali i want to make sure i have the right equipment on my ride ...

leaveit2bevo
12-19-2003, 01:11 AM
our cats are already pretty free flowing, I bet could take off the cat and take out all the shit inside and make a free flow cat.

drmosh
12-19-2003, 06:01 PM
It's not necessarily OBD II, it's if it can pass O2 sensing. Removing your cat changes the exhaust mixture. High flow cats are expensive and don't necessarily give you a performance gain over your standard cat, if yer serious, bolt on a test pipe when you are at the track or drag, then put your stock cat back on when you need to run O2 compliant.

EvolOne
12-19-2003, 09:49 PM
I'm one of the first that got AVO turbo-back from BrainStorm and very please with it. It fixed perfect, excellent quality, and sound great when WOT. It's much quieter than my prior RMR turbo-back and I like the stock-looking straigh tip than RMR angle-out tip. The RMR sounds great as well but louder. Both fell stronger with my 'butt' dyno but I was only able to dyno with the AVO which gains me about 32 HP from BrainStorm dyno.<br>
I sold RMR to a member of EvolutionM.net and he like it a lot too. I'm going to get the APS 330 HP upgrade without their turbo-back so keeping the AVO. I hope I'll able to get some good numbers after that and let you know. Have a good day guys.

Hi G20, another avo dude. What do you know about the rumor that the AVO tapers down from 3" or starts tapered? What did you do to protect oil sump from excessive heat tranfer from the new downpipe from AVO?

Did you cermaic coat? Or steal a sump blanket from RMR? Rob2

CACalomino
12-20-2003, 01:39 AM
get is jethot coated. I droped my DP off to a local hot rod shop to get it coated it will hold heat up to 1300 degrees.

just my .02

-chris

ErroR
12-20-2003, 01:09 PM
I might wait for the Apex'i GT Spec exhaust. Supposed to be greater than 3 inch and in Japan their catback alone nets over 20whp

G20
12-21-2003, 10:04 PM
I'm one of the first that got AVO turbo-back from BrainStorm and very please with it. It fixed perfect, excellent quality, and sound great when WOT. It's much quieter than my prior RMR turbo-back and I like the stock-looking straigh tip than RMR angle-out tip. The RMR sounds great as well but louder. Both fell stronger with my 'butt' dyno but I was only able to dyno with the AVO which gains me about 32 HP from BrainStorm dyno.<br>
I sold RMR to a member of EvolutionM.net and he like it a lot too. I'm going to get the APS 330 HP upgrade without their turbo-back so keeping the AVO. I hope I'll able to get some good numbers after that and let you know. Have a good day guys.

Hi G20, another avo dude. What do you know about the rumor that the AVO tapers down from 3" or starts tapered? What did you do to protect oil sump from excessive heat tranfer from the new downpipe from AVO?

Did you cermaic coat? Or steal a sump blanket from RMR? Rob2

Whew! Quite a few questions huh? No, I don't know anything about the rumor about the AVO tapers down to the cat. I didn't do anything "special" to protect oil sump from downpipe as well as ceramic coat or "blanketing" anything since I didn't know that there's the problem. I been running AVO turbo-back system since August and no problem so far.

Where did you heard about the excessive oil problem? I hope it's not some kind of "marketing" rumor so we'll buy uneccessary products. Have a good day.

erioshi
01-06-2004, 11:28 AM
I have a Vishnu "standard" Turbo-back exhaust and the thing is solid. Has a nice growl at idle and decent sound at WOT. It's louder than stock, but doesn't boom or drone. I've had it in the car for about 6 months now without any problems and everything is still as solid as it was when I first put it in. Great construction and everything fit perfectly.

No dyno numbers, though - the nearest awd dyno is about 10 hours away.

howiEVO8
01-06-2004, 11:29 AM
what's WOT mean? lolz

CarbonFibre
01-06-2004, 04:00 PM
what's WOT mean? lolz
Wide open throttle.

The bigger the piping diameter (such as the Apexi that someone mentioned) will make better peak gains at the top of the rev range but will probably make less low end power and torque than a smaller pipe diameter. The biggest exhaust may have the biggest peak horsepower gain which is good for impressive numbers to brag about and to net sales but that won't always mean it's the best exhaust. That's why dyno graphs help but it's still hard when most of the tests are done at different parts of the country in different conditions. The magazine tests are probably the best way to compare different exhaust setups (unless they have a bias towards their advertisers like many magazines do).

Oh well, food for thought I guess.

perversity
01-06-2004, 06:03 PM
Hi G20, another avo dude. What do you know about the rumor that the AVO tapers down from 3" or starts tapered? What did you do to protect oil sump from excessive heat tranfer from the new downpipe from AVO?

Did you cermaic coat? Or steal a sump blanket from RMR? Rob2

I discussed this b4 I put my AVO dp on the car. Because of the increased flow in the pipe it doesn't retain heat in the same way that the stock one does.

I have an oil temp guage and the oil temps are actually lower with the AVO dp than with the stock dp. (I am sure this is the case with a lot of the 3" down pipes) Having said that, I have header wrap and I will wrap the dp when I get a chance, just to be sure!

Oh, and AVO is 3" all the way through. There is NO taper.

howiEVO8
01-06-2004, 06:23 PM
when u say you have header wrap, do you mean...the manifold?

leaveit2bevo
01-06-2004, 06:38 PM
I think he means heat wrap which prevents a grip of excess heat from affecting oil temps.

evo_dadi
01-06-2004, 08:04 PM
I sold RMR to a member of EvolutionM.net and he like it a lot too. I'm going to get the APS 330 HP upgrade without their turbo-back so keeping the AVO. I hope I'll able to get some good numbers after that and let you know. Have a good day guys. thats me :D im getting my car dyno'ed on the 24th with the rest of the norcal guys at vishnu and ive been itching how much i gained with the rest of my mods.

G20
01-07-2004, 10:53 PM
I sold RMR to a member of EvolutionM.net and he like it a lot too. I'm going to get the APS 330 HP upgrade without their turbo-back so keeping the AVO. I hope I'll able to get some good numbers after that and let you know. Have a good day guys. thats me :D im getting my car dyno'ed on the 24th with the rest of the norcal guys at vishnu and ive been itching how much i gained with the rest of my mods.
Cool! Let us know how much hp you got? Nice to hear from you.

Absinthe
01-11-2004, 01:27 PM
I saw some one post that Buscher uses a magnaflow muffler
these in general are not all that different than flowmaster mufflers anybody see anything wrong with having one fabbed up for the car w/a custom down pipe?

this wold be a 400$ set up for a urbo back and light too.