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View Full Version : How much boost do most people run on CA91 and what AFR



TheBoz
02-23-2011, 10:26 AM
I have got the boost up to about 25psi, and the car feel awesome, however the weather is super cold out right now which I am sure is helping me to run way more boost. My previous car was a built motor car, so I could get away with a lot more. Just figured I would see what poeple are doing. Also I do not have very much timing in the car right now. I am also running about 10.8-11.0 AFR Seems kind of rich however I am very new to the evo, and not 100% sure what it wants.

Mods
Evo 9 Turbo
Tietk O2
HKS 2.75 DP
HKS Cat Back
Ghetto Test Pipe
Nesei LICP
Tial BOV
FIC 1100cc
AEM EMS

Stock everything else.

one4
02-23-2011, 10:39 AM
My 91 map is 10.9-11.1 at wot. Running 24-25psi

DSVHEVO1
02-23-2011, 11:44 AM
Check naji's write up on my tune, " another E-85 throttle swith, I think both my tunes are referenced. Where do you live that its that cold anyway?

RALLInspired_
02-23-2011, 11:48 AM
24-25psi peak is the norm.Â* Anything over 22-20psi by redline is inefficient on a STOCK IX turbo.Â* I usually taper to 18psi with some good timing.Â* Boost control method? How are those FIC 1100cc? The sets i've seen and worked with they have sucked for lack of a better term.

TheBoz
02-23-2011, 12:42 PM
Check naji's write up on my tune, " another E-85 throttle swith, I think both my tunes are referenced. Where do you live that its that cold anyway?


By cold I mean 60* AIT's. In the summer here I have seen 140* AIT on a large turbo.


RALLInspired_ :
I am running a halman MBC

1100cc's are awesome. They idle awesome, they drive very well. I was running the 2150cc's before and those were awesome as well, on pump gas the Min IPW was just to low and the AFR would jump from 13.5-16.5, and most of the time in the 14.7-15.2. On E85 at full tilt I was only at 30% DC on the 2150cc, so I finally gave in and got the 1100cc's. So far I could not be happier with them. I will have to shot some video of a cold start and idle. On the ems I have the idle at 900rpm, and I am sure that I can hit 800rpm with out an issue.

The biggest thing I have to dail in on the car is the AIT Correction. I really need the weather to warm up before I can really dial that in.

The last thing that is very strange is my boost curve.

RALLInspired_
02-24-2011, 01:47 AM
what does your timing look like? when using VD add weather correction and as many correct details as you can.

HMatt
02-24-2011, 03:48 AM
How are those FIC 1100cc? The sets i've seen and worked with they have sucked for lack of a better term.


Really? This is the first bad statement I've heard about them... And idk if this guy's opinion on them counts that much since he's running an EMS, those things can make pretty much anything idle pretty good. lol

TheBoz
02-24-2011, 09:10 AM
How are those FIC 1100cc? The sets i've seen and worked with they have sucked for lack of a better term.


Really? This is the first bad statement I've heard about them... And idk if this guy's opinion on them counts that much since he's running an EMS, those things can make pretty much anything idle pretty good. lol


Well I was running the 2150cc's on the stock ecu, and it idled very well considering how large the injectors were. On e85 the 2150cc's idle perfect. When I switched to the AEM EMS I had the exact same results. So I would guess that I would have the same results ont he stock ecu and the 1100cc's. They are a fantastic injector.

TheBoz
02-24-2011, 09:15 AM
[email protected] = 2.3*
[email protected] = 3.7*
[email protected] = 9.3*

So the timing still needs a little bit of work, I also have to ditch the stock intake. I will be making my own over the weekend. I also need to do my timing belt before I really want spin the motor past 7k.

oldevodude
03-09-2011, 12:22 AM
26psi with wimpy timing makes more power for me than lower boost with more timing. Turbo is slightly oversized though and right around 11to1 AFR.

RALLInspired_
03-09-2011, 12:49 AM
what does your knock voltage look like?

oldevodude
03-09-2011, 08:38 PM
what does your knock voltage look like?


I don't really get granular to the point of lookng at voltage but typically zero to 1 count of knock and with bad gas or full moon a 2 knock count :)
PS I run really low timing

WOT
03-11-2011, 09:25 PM
is this a evo 8 or 9? what cams?

my car was an 8.

here is what i ran with hks 264 cams & hfc on 91oct.

10.8 / 11.0 on 91 oct w/aem ecu.

24/25 psi tapering down to ~21

[email protected] = 6.5*
[email protected] = 4.5*
[email protected] = 11.8*

if your running oem cams, i highly recomend cam gears @ -4/-4Â* O0

you'll loose ~5whp down low to pick up ~30whp @ 7kÂ* ^-^Â* ;)Â* :coolsmiley:Â* :smitten:Â* O0

btw, if your boost suddenly falls after the intial boost on-set / spike, it is due to a oem w/g.....or a weak forge w/g act.....i recomend a fp 18 psi w/g actuator set @ mid-way through the eye-let....dont over do it, as the stock turbo will just create backpressure which is a huge power killer.....or shoving a horse cock up your a$$, neither of which you want :2funny: :D :knuppel2:

GL

oldevodude
03-15-2011, 07:54 PM
OEM cams but aftermarket turbo. same 11to1 AFR but 26 tapering to 24. Been a while I'd have to look at a map but I'm thinking around 2 at peak TQ due to higher flow and me being ultra conservative. I run E85 99% of time but simply thought I'd reply to thread any way O0

oldevodude
03-15-2011, 08:00 PM
TO OP ....

The Evo will make more power with leaner mixture say 11.5 but I like to try and play it safer

WOT
03-15-2011, 08:23 PM
The biggest thing I have to dail in on the car is the AIT Correction. I really need the weather to warm up before I can really dial that in.not true.

pm me your email. will send over a ait slope for you.



The last thing that is very strange is my boost curve.
what w/g actuator & bov are you running?

i recomend a evo 9 unit for ~27psi or less.

btw, you can make a oem ebc work better than your hallman up top >6k revs.

TheBoz
03-15-2011, 11:16 PM
^^

I have switched to E85, I finally go the car running well on 91 but the fun is with e85. I am going to try to get to the upper 300's on E. The car already spins the tires during a 3rd gear pull. So that is making it a little strange to tune, I might have to hit a dyno to dial it all the way in.

Are you running an AEM EMS?

WOT
03-16-2011, 05:54 PM
^ yes, i have been running/tuning the aem since '04.

Johnson
04-05-2011, 06:09 PM
26.. low 11's afr

lilenday
05-11-2012, 02:30 AM
25 low 11s. tuned by TT

Nito619
09-17-2012, 11:28 PM
holding 22 psi to redline, 10* timing advance by redline (12* degrees peak), 11.8 afrs, 9:1 compression, no knock

baylorar
09-18-2012, 11:22 AM
holding 22 psi to redline, 10* timing advance by redline (12* degrees peak), 11.8 afrs, 9:1 compression, no knock


why in the fuck are you replying to this?

misterevo8
09-20-2012, 10:41 AM
[email protected] wot. stock fuel pump and injectors if it matters.

amaev05
09-21-2012, 05:18 PM
[email protected] wot. stock fuel pump and injectors if it matters.


wtf? 14.62afr? peak boost??? that sounds psycho lean to me. but i dont know anything about that.

misterevo8
09-21-2012, 10:31 PM
[email protected] wot. stock fuel pump and injectors if it matters.


wtf? 14.62afr? peak boost??? that sounds psycho lean to me. but i dont know anything about that.


It should be right considering that it was tuned conservative. i think anything over 16 would be lean.

misterevo8
09-21-2012, 10:34 PM
[email protected] wot. stock fuel pump and injectors if it matters.


wtf? 14.62afr? peak boost??? that sounds psycho lean to me. but i dont know anything about that.


It should be right considering that it was tuned conservative. i think anything over 16 would be lean.


correction hold 12's for afrs.