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Old 06-14-2013, 10:49 AM   #1
JVAWN
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Member#: 265436
Join Date: Nov 2010
Chapter/Region: MAIC
Location: SE PA
Vehicle:
2002 wrx
blue

Default how much boost should i run/power expectations?

Okay so i haven't been on this forum much over the years but my car has gone through several different stages. Basically what im looking for is a general idea of what power i'll be putting to the ground, as well as what kind of a quarter mile time i could expect to achieve. also looking for input to make the set up better and what to set the boost at

Car: 2002 wrx

motor:
Ej205 bored .20 over
ACL rod/main bearings
eagle I beam rods
Wiseco 92.5mm pistons(stock stroke)
killer b ultimate oil pickup
brian crower valve springs with titanium retainers
heads recieved a slight port
tgv deletes

trans/drivetrain:
Car has a stage 2 clutch
Rallispec Sti gearset in trans with all new synchros

turbo/fuel:
Blouch 18gxt with a ceramic coated housing
bosch flow tested 850cc injectors
walbro 255lph pump
turboxs top mount intercooler
hks ssqv
3" perrin turbo inlet

other bolt ons:
Injen cold air intake
Invidia up pipe
4" bellmouth downpipe
3" straight pipe cat back
poly motor/trans mounts
Grimmspeed crank pulley
Megan short shifter
other stuff im probably forgetting

tune:
Cobb accessport with a dyno tune (not done yet)

wheels/tires:
17x8 rota g forces with 235/45/17 Z rated tires wrapped on them so it should hook
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Old 06-14-2013, 11:05 AM   #2
JVAWN
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Join Date: Nov 2010
Chapter/Region: MAIC
Location: SE PA
Vehicle:
2002 wrx
blue

Default

gunning for anything over 350whp and a 12.99 or faster time slip. i think that should be pretty well achievable but i've never built a subaru motor before. im a mustang convert lol. these cars are soo much fun

i was also thinking of tuning it at 20psi. that sound right?
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Old 06-14-2013, 03:46 PM   #3
bluemk3
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Join Date: Nov 2010
Location: hollidaysburg, pa (central Pa)
Vehicle:
2002 WRX
World Rally Blue

Default

Your tuner should know what psi the car likes best. And should stop there.. I.e. when the car stops making power.... but if you are running this stuff with our a tune.. I'm sure you won't make it to a tune..
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Old 06-14-2013, 04:57 PM   #4
JVAWN
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Location: SE PA
Vehicle:
2002 wrx
blue

Default

motors still on a stand. lol. car is not being driven. going in for a tune in 3 weeks. just curious if anyone can guess what power it will put down
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Old 06-16-2013, 09:00 PM   #5
bluemk3
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Vehicle:
2002 WRX
World Rally Blue

Default

Quote:
Originally Posted by JVAWN View Post
motors still on a stand. lol. car is not being driven. going in for a tune in 3 weeks. just curious if anyone can guess what power it will put down
Just fyi.. this question is a no no here...
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Old 06-16-2013, 10:55 PM   #6
scby rex
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Join Date: Jan 2006
Chapter/Region: TXIC
Location: copperas cove
Vehicle:
02 wrxbastardchild
aw, MPS 2.34 breaking in

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Man those z rated tires should hook.
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Old 06-17-2013, 02:45 PM   #7
Shortpersonbk
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Location: Michigan
Vehicle:
12 sti 68mm turBRO
10.48 @134 (6266)

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I am runnin a 18g xt with a 8cm hotside on a 2L and I am overall unimpressed by this turbo, but it could just be my setup/tune on e-85 I only trapped 111-112 realistically this turbo should be able to net 340-350whp on pump gas but my car strongly disagrees
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Old 06-17-2013, 03:51 PM   #8
scby rex
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Join Date: Jan 2006
Chapter/Region: TXIC
Location: copperas cove
Vehicle:
02 wrxbastardchild
aw, MPS 2.34 breaking in

Default

Or you have a crap "conservative" tune.
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Old 06-17-2013, 04:04 PM   #9
cowboy_Rob
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Location: Camp Hill PA
Vehicle:
2003 Impreza WRX
PSM

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Quote:
Originally Posted by Shortpersonbk View Post
I am runnin a 18g xt with a 8cm hotside on a 2L and I am overall unimpressed by this turbo, but it could just be my setup/tune on e-85 I only trapped 111-112 realistically this turbo should be able to net 340-350whp on pump gas but my car strongly disagrees
You should be doing way better then that especially on e85. Unless your maxing out your injectors do they had to keep the boost low maybe
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Old 06-17-2013, 08:23 PM   #10
Shortpersonbk
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Location: Michigan
Vehicle:
12 sti 68mm turBRO
10.48 @134 (6266)

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Quote:
Originally Posted by cowboy_Rob View Post

You should be doing way better then that especially on e85. Unless your maxing out your injectors do they had to keep the boost low maybe
23 psi and 30 degrees of timing up top it has to be something to do with my setup but in just sharing my personal experience

My injectors are close to maxing out, 750ccs but only at %90 at 12.0afr so the afrs may be a little conservative but the timing and boost isn't really

My tuner basiclly told me he doesn't like the 18gs to much and thinks we would have had much better luck with a 20g 7cm hotside

Last edited by Shortpersonbk; 06-17-2013 at 08:33 PM.
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Old 06-26-2013, 12:30 PM   #11
verentchan
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Vehicle:
2008 WRX
Silver/Black

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Quote:
Originally Posted by Shortpersonbk View Post
23 psi and 30 degrees of timing up top it has to be something to do with my setup but in just sharing my personal experience

My injectors are close to maxing out, 750ccs but only at %90 at 12.0afr so the afrs may be a little conservative but the timing and boost isn't really

My tuner basiclly told me he doesn't like the 18gs to much and thinks we would have had much better luck with a 20g 7cm hotside
You're probably not getting enough fuel. Think about upgrading to 1100-1200cc's for E85 and I bet that thing will fly. You'll need a 2nd fuel pump or bigger than a 255 to keep the pump duty cycle down. I was running 1200cc injectors on E85 and getting around 480 ftlb, 430 hp on a conservative tune. Now unfortunately I'm in an area with no E85 within 100 miles so I'm stuck running 91 CA pump gas

::EDIT:: Depending on what block you're running....
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Old 06-27-2013, 04:29 PM   #12
fastblueufo
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Location: Ed@fastperformancetuning.com
Vehicle:
02 billet crank
pauter rods, pt5857, E85

Default

Op, what are your build specs? Mainly bore, stroke, hg thickness, head cc size in cc's, piston dish size in cc's, piston to deck clearance? Cam size? All that stuff will matter and will have a greater affect on how much boost you can run and ultimately how much hp you can make on a certain fuel. Also what fuel are you going to be tuned on?
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