Engine/Power - EJ25T (STI and 2006+ WRX) Discussions about the USDM 2006+ WRX and WRX STi 2.5 liter turbo flat-four.

If I wanted to make 300whp...

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Old 08-11-2009, 12:03 AM
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If I wanted to make 300whp...

conservatively speaking, what woudl i have to do.

Could I make 300whp on a 16g, or would a 18g/20g be neccesary for these numbers?

what numbers could i put down with a 16g?

if it is possible with a 16g, but a specific kind, which kind, or shoudl i be lookign at vf34.

would i need bigger/different injectors. fuel pump, tmic, exhaust?

would my tranny suffer after all is said and done, or should it be ok?


car details

2006 wrx wagon
32,xxx
spt intake, heatshield, exhaust
excedy stage 1 clutch
excedy lightweight flywheel

thanks in advance,

anyone running a 16g or 18g your input is wanted and welcome, but please let me know yoru supporting mods with he numbers you are putting out

-ryan
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Old 08-11-2009, 12:36 AM
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if ur gonna use a big evo III 16g ported and polished u can get pretty damn close to 300 but ur gonna need suppoting mods.

650 injectors (maybe 750 so u can always go bigger)
fuel pump
bigger tmic
and may need 100oct
and also depends who tunes it i no GST has a low reading dyno

im goin with an 18g to be sure i get there without maxing out the 16g with supporting mods

18g
header
fp
turbo inlet
maf hose
sti tmic
turbo back
100oct
and tune
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Old 08-11-2009, 12:54 AM
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Originally Posted by silverbullet415
if ur gonna use a big evo III 16g ported and polished u can get pretty damn close to 300 but ur gonna need suppoting mods.

650 injectors (maybe 750 so u can always go bigger)
fuel pump
bigger tmic
and may need 100oct
and also depends who tunes it i no GST has a low reading dyno

im goin with an 18g to be sure i get there without maxing out the 16g with supporting mods

18g
header
fp
turbo inlet
maf hose
sti tmic
turbo back
100oct
and tune
what are you expecting to put down?
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Old 08-11-2009, 11:26 AM
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Originally Posted by Irish_car_B0mb
what are you expecting to put down?
im hoping to make 300whp and close to that in tq but i dont no if the tranny can take it
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Old 08-11-2009, 11:41 AM
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you got a 2.5 go with the 20g and have a east 320whp on 91.... whp play games on a small 16g when a 20g is not much more and you get a lot more power out of the turbo..
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Old 08-11-2009, 12:06 PM
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all you need is NAWWWWWWSSSSSS

seriously though with your 2.5, if you want a solid 300 on a conservative tune and pump gas, I would recommend a stage 1 motor setup cause the 2.5 internals suck. You should easily get there conservatively with:

STI TMIC+
20G+
650CC+ injectors
walbro FP
most importantly a tune to match your application.
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Old 08-11-2009, 12:08 PM
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Originally Posted by johndabrit
all you need is NAWWWWWWSSSSSS

seriously though with your 2.5, if you want a solid 300 on a conservative tune and pump gas, I would recommend a stage 1 motor setup cause the 2.5 internals suck. You should easily get there conservatively with:

STI TMIC+
20G+
650CC+ injectors
walbro FP
most importantly a tune to match your application.
what r u makin on ur set up
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Old 08-11-2009, 12:12 PM
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On a vf39 and supporting mods tuned conservatively and at 18.5psi I was 262 and 280 on a reallllly hot day. I'm back in the shop now to do some internals I didnt feel right about skipping during the swap and also changing to a vf43. When completed my block will be an EQ stage 1 block plus everythiing i already had. I expect to see my numbers get closer to the 300 mark myself but I'm not in it for the HP. I'm in it for how well it drives and longevity of the motor.
-J

Last edited by johndabrit; 08-12-2009 at 09:02 AM.
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Old 08-11-2009, 12:14 PM
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Originally Posted by johndabrit
On a vf39 and supporting mods tuned conservatively and at 18.5psi I was 262 and 280 on a reallllly hot day. I'm back in the shop now to do some internals I didnt feel right about skipping during the swap and also changing to a vf34. When completed my block will be an EQ stage 1 block plus everythiing i already had. I expect to see my numbers get closer to the 300 mark myself but I'm not in it for the HP. I'm in it for how well it drives and longevity of the motor.
-J
i made 220whp and 220wtq on my stock turbo with dp up sti tmic on gsts dyno
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Old 08-11-2009, 12:19 PM
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I had a buddy making close to I think 285 at the wheels on the 06 WRX motor with a VF34, ewg, and headers.

I'm not sure what you could do to gain an extra 10-15 at the wheels.
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Old 08-11-2009, 12:45 PM
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Old 08-11-2009, 10:27 PM
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Originally Posted by silverbullet415
i made 220whp and 220wtq on my stock turbo with dp up sti tmic on gsts dyno
???

everything was stock or just the turbo

the reason i ask is i made 220whp and 240wtq with spt intake with heatshield, and spt cat back exhaust. UP, DP and everything else was stock
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Old 08-11-2009, 10:38 PM
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Originally Posted by Irish_car_B0mb
???

everything was stock or just the turbo

the reason i ask is i made 220whp and 240wtq with spt intake with heatshield, and spt cat back exhaust. UP, DP and everything else was stock
i made it on up dp sti tmic and tune thats it on my 2.0
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Old 08-11-2009, 10:51 PM
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Originally Posted by Irish_car_B0mb
???

everything was stock or just the turbo

the reason i ask is i made 220whp and 240wtq with spt intake with heatshield, and spt cat back exhaust. UP, DP and everything else was stock
Not on GST's mustang you didn't, maybe on EQ's laptop, but not on the heartbreaker.
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Old 08-11-2009, 11:00 PM
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Originally Posted by glenspen
Not on GST's mustang you didn't, maybe on EQ's laptop, but not on the heartbreaker.
i made my 220 220 on gst
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