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View Full Version : what size injectors would i need?



RJT132005
04-11-2012, 03:55 AM
i am looking a getting a Tomei Arms M7960 turbo kit and i think ill need to get a fuel pump and injectors too. my goal it 350hp on 91 i would go e85 but im moving to pa that dose not have e85.

evodriver49
04-11-2012, 04:17 AM
1200cc's would be ideal

RJT132005
04-11-2012, 06:59 AM
so thats not to big?

RJT132005
04-11-2012, 07:08 AM
also dose anyone run the Tomei?

amaev05
04-11-2012, 09:19 AM
You will be fine with 800cc injectors. They will be easier and cheeper to buy used.I am running rc1000cc injectors, and on 91 octane and around 400 hp they are @ 68% duty, I have ben running the tomei for over 3 years, works well for me. And there customer service is excelent!

RJT132005
04-11-2012, 09:35 AM
ok thank you that's sound's alot better then 1200cc i know that's a big number.

amaev05
04-11-2012, 10:40 AM
How ever you could run the 1200cc with no issues.

evodriver49
04-11-2012, 02:29 PM
o wow it was super early and i didnt read correctly and skimmed thru your post, i thought you said you were going e85 for some reason lol my bad!

Boosted
04-11-2012, 02:43 PM
how fucking dumb are you? you skimmed through a 2 sentence post?

Boosted
04-11-2012, 02:45 PM
I would advise you do not give advice without thoroughly reading the question from now on.

(post broken up to avoid skimming)

2muchboost
04-11-2012, 03:32 PM
I would advise you do not give advice without thoroughly reading the question from now on.

(post broken up to avoid skimming)





how fucking dumb are you? you skimmed through a 2 sentence post?


:2funny:

maikumaru
04-11-2012, 03:35 PM
with that turbo, you could probably make 350 with even stock injectors on 91.
you could even upgrade to 720's if you wanted....probably not necessary tho.

amaev05
04-11-2012, 05:36 PM
he thinks he only wants 350hp.... :2funny:

RJT132005
04-11-2012, 09:38 PM
well i am on a 3000 dollar budget so i want to stay in that range for now lol. i will get 1200 and just stock up on E85 once a month there.

RJT132005
04-11-2012, 09:43 PM
no worries evodriver49

amaev05
04-12-2012, 05:25 AM
Lol.. See.. Already!

evodriver49
04-12-2012, 02:38 PM
I would advise you do not give advice without thoroughly reading the question from now on.

(post broken up to avoid skimming)

i would advise you not too make 2 stupid posts about flaming a person instead of giving advice at least i tried you fuck.

casperdomo
04-12-2012, 03:01 PM
how fucking dumb are you? you skimmed through a 2 sentence post?


Did you not get a cream pie?

casperdomo
04-12-2012, 03:02 PM
I would advise you do not give advice without thoroughly reading the question from now on.

(post broken up to avoid skimming)


I would advise you to get a cream pie.

oldevodude
04-12-2012, 10:50 PM
most 1200 or really only 1080 or so (go to RC website)but if you plan on E85 in the future 1200's will offer headroom and if you get the itch to upgrade (high possibility for most) then you won't have to re-buy injectors so soon. The various 1200's out there have proven to be reliable and drivability is very good when scaled properly too.
to get the true 1200 you'd have to run 54 psi rail pressure as they are rated 1200 at that psi and 1076 at Evo 43.5 psi


My two sense

PS I believe there is E85 consideration

oldevodude
04-12-2012, 10:55 PM
with that turbo, you could probably make 350 with even stock injectors on 91.
you could even upgrade to 720's if you wanted....probably not necessary tho.


Injectors would be super high duty cycle and there is risk of them locking up. There is technical term for it but it eludes me as I am old :) . I know many have run over 100% duty cycle but I personally wouldn't as risk outweighs reward. I'm not bashing just trying to offer advice to OP.

PS My stockers were at around 106% Duty cycle at around 323 HP and that was on Dynojet. I immediatly upgraded to 1050's then swapped to current 1200
My experience YMMV

AlphaKennyBody
04-12-2012, 10:59 PM
With 3K to spend... you can get an Evo 9 turbo with some 272 cams on 91/93 you can Easily make 350. You can for sure hit the number with parts ported. Just saying. O0

RJT132005
04-13-2012, 12:41 AM
if i get cams then i would have to do springs and retainers. i will get 93 in Pennsylvania so i don't know if i run 93 on a 91 tune if that will hurt it. really i would love it make the most bang for my buck out of the 3k i have to work with.

AlphaKennyBody
04-13-2012, 12:55 AM
Being tuned on 91 but then running 93 isn't going to hurt if anything your car will run super safe if tuned on 91 while running 93.... There are cams out there where you dont NEED to do springs and retainers.

RJT132005
04-13-2012, 01:05 AM
so what cams are they?

amaev05
04-13-2012, 06:01 AM
I ran my kelford 272's on stock valvetrain for a few thousand miles with no issue, but keeping the stock rpm limit.

oldevodude
04-13-2012, 04:38 PM
bigger bolt on turbo, injectors and tune is what I'd do for most bang for buck. A bigger turbo will outperform cams any day and then add cams later if you want more.Â* Besides don't have to even open engine up even if it is only top end.Â* LOLÂ* my valve cover has never been off and coming up on the big 50k
not saying to do it this way just sayinÂ*

PS Fuel pump might be needed if not already there

RJT132005
04-13-2012, 10:44 PM
any suggestions for a turbo?

oldevodude
04-13-2012, 11:32 PM
you should research and pick your power level and responsiveness you want. Some like big hp at the expense of spool up or added lag and others like less power but earlier delivery.

CBRD and Forced Performance both make arguably the most popular bolt on for Evo and each have their respective fan clubs. both offer small medium and large bolt ons. I would try to remember when chasing a HP number that there are trade offs and as an example I have a bolt on turbo that added 50 or so HP over my 9 turbo but honestly I miss the faster spool of the stocker from time to time.

If you know peeps ideally you'd ride in a car with a given setup

Good Luck

RJT132005
04-13-2012, 11:55 PM
i have only been in my evo so i have a intake and turbo back that's all for now. i am not sure all i want it to get too a 100mph quickly.

2muchboost
04-14-2012, 12:20 AM
you should research and pick your power level and responsiveness you want. Some like big hp at the expense of spool up or added lag and others like less power but earlier delivery.

CBRD and Forced Performance both make arguably the most popular bolt on for Evo and each have their respective fan clubs. both offer small medium and large bolt ons. I would try to remember when chasing a HP number that there are trade offs and as an example I have a bolt on turbo that added 50 or so HP over my 9 turbo but honestly I miss the faster spool of the stocker from time to time.

If you know peeps ideally you'd ride in a car with a given setup

Good Luck


This answer should be automatically posted every time someone inquires about "what turbo to run"
Great reply!
O0

redridingboost
04-15-2012, 08:06 PM
You could run 1000cc and I would be more than fine.

maikumaru
04-15-2012, 09:11 PM
with that turbo, you could probably make 350 with even stock injectors on 91.
you could even upgrade to 720's if you wanted....probably not necessary tho.


Injectors would be super high duty cycle and there is risk of them locking up. There is technical term for it but it eludes me as I am old :) . I know many have run over 100% duty cycle but I personally wouldn't as risk outweighs reward. I'm not bashing just trying to offer advice to OP.

PS My stockers were at around 106% Duty cycle at around 323 HP and that was on Dynojet. I immediatly upgraded to 1050's then swapped to current 1200
My experience YMMV



Touche friend.
I was thinking in terms of min maxing setup...with a little "depends on dyno" sprinkled in.
No argument from me concerning duty cycle...but even a few years back 1000 cc was still considered big/extreme/rare....now it is common.

GokuSSJ4
04-16-2012, 11:07 AM
with that turbo, you could probably make 350 with even stock injectors on 91.
you could even upgrade to 720's if you wanted....probably not necessary tho.


Injectors would be super high duty cycle and there is risk of them locking up. There is technical term for it but it eludes me as I am old :) . I know many have run over 100% duty cycle but I personally wouldn't as risk outweighs reward. I'm not bashing just trying to offer advice to OP.

PS My stockers were at around 106% Duty cycle at around 323 HP and that was on Dynojet. I immediatly upgraded to 1050's then swapped to current 1200
My experience YMMV



Touche friend.
I was thinking in terms of min maxing setup...with a little "depends on dyno" sprinkled in.
No argument from me concerning duty cycle...but even a few years back 1000 cc was still considered big/extreme/rare....now it is common.


Why limit your goals by sticking to OEM or 720cc injectors? you can have the bigger injectors scale to your needs and still have room for growth.
Whether you decide down the road to change to a stock alike turbo, do E85 or simply stay with a merly 330whp goal, you dont have to worry about changing your injectors down the road.
A lot of us at the beginning used to run 720cc denso injectors. Once E85 became available and ECU flash; a bigger injector became the smarter choice to run

AJR-Coco
06-18-2012, 04:35 PM
I have a tomei running 25psi on 94 oct - I'm just running on 750cc, wish I could run 1000cc instead for more room to adjust

amaev05
06-18-2012, 07:15 PM
94 octane? where u from?

AJR-Coco
06-19-2012, 07:49 PM
BC - Canada but i also have a place in LA

I am running 750 injectors and my dyno is 350 whp 25 psi. Pretty sure you can get better result than just 350 hp with the mods you have

oldevodude
06-22-2012, 10:53 AM
you should research and pick your power level and responsiveness you want. Some like big hp at the expense of spool up or added lag and others like less power but earlier delivery.

CBRD and Forced Performance both make arguably the most popular bolt on for Evo and each have their respective fan clubs. both offer small medium and large bolt ons. I would try to remember when chasing a HP number that there are trade offs and as an example I have a bolt on turbo that added 50 or so HP over my 9 turbo but honestly I miss the faster spool of the stocker from time to time.

If you know peeps ideally you'd ride in a car with a given setup

Good Luck


This answer should be automatically posted every time someone inquires about "what turbo to run"
Great reply!
O0


Thanks for "Reppin"

LOL I kinda wish I was in his shoes as it is kinda fun trying to figure out upgrade path

Black Evo Beauty
06-22-2012, 02:46 PM
Just get big 1s