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Old 04-21-2013, 04:34 PM   #1
pippen
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Default Shooting for 500whp !

So I thought I would share with you guys the build I'm working on right now and hopefully incorporate some of your opinions/suggestions along the way. It also might benefit someone else with a similar setup.

So first off the car is a 08 STi hatch. I was running CAI, TBE, EBCS, ID1000's, dw65c fp, and e-85 phat ron tune @ 22.5psi.. never had it dynod but I estimate it to be around ~350whp? Anyways in the process of tuning I had some knock issues and ron suggested a compression test. 145, 140, 140, and cylinder 4 was 45 No knocking sound, no smoke no nothing just seeing knock in the log. After the test I immediately pulled the motor and here I am.

Yesterday I dropped the longblock off at a local shop here in San Diego called S & S motorsports to start the build. Steve suggested the following setup (sorry this is my first build so not 100% sure exactly what was on the list, LMK if you see something I need to add)

JE pistons
Crower I beam rods
arp fasteners and studs
decked heads
valve job
bore/hone to like .003 or something to eliminate piston slap
resurface flywheel, install stage 2 clutch (3 puck??)
tgv deletes
acid dip/paint shortblock
Tomei 3-bolt ELH
EBCS
CAI
ID1000's
dw65c pump
TBE
GS A/O separator
E-85 Reese tuned and dynod

The plan is that this setup should hold the 500whp goal we're trying to hit.. hopefully. While the motor's in the shop I'm researching turbo setups.. It seems like a rotated setup would be expensive and have minimal gains, twin scroll is too expensive, so I have my eye on the GT3076r. I'm aiming for an overall kick in the pants drive in every gear all the time as it will be a daily driver type car. I don't want a big arse turbo that hits full boost at like 6k.. According to Garrett this turbo hits full boost 3 to 400 rpms later than the VF48 and pulls hard all the way through. My question here is whether or not I should get the "better flowing" GTX3076r which is good for like 600whp where the gt is 525whp.. Is the extra cost worth it or do I need it?

I'm also looking for TMIC's.. Have no idea which one I should shoot for yet.. OR should I go FMIC???

I'll update with pictures as soon as the motor get's pulled apart so we can see what the stock pistons look like.
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Old 04-21-2013, 06:39 PM   #2
A-man07
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If you want 500whp you should run a GT35 turbo and a FMIC. Do a rotated build as your research here is faulty, it is worth every bit of it. Ditch the GS AOS. Completely inadequate for this build.
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Old 04-21-2013, 07:06 PM   #3
07pearlwht
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You might want to regroup on your fuel system if you're going to run ethanol.
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Old 04-21-2013, 07:12 PM   #4
scby rex
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Yeah. No grim aos that's for stg 2 fan boys. How do you say to expensive for a rotated setup then say you want a gt3076? Stock location is going to be a pita to work on and ultimatley limit power. If you wanting 500 whp you should look into some head work and cams of some sort ie kelford or gsc. Do what you want though uts your car and money.
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Old 04-21-2013, 07:13 PM   #5
punchjamesarnol
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I agree ^^^ with the fuel system. Your car is gonna be a beast! I had Steve build my block as well, same parts and the closed decking still holding strong. His son was my neighbor when I lived in Santee. LOL! I have my car down at Speed Force Racing at the moment getting my Walbo400 hard wired. If I had the chance to do it all again, I would have done head work and got some mid-range cams to suit my driving style in the canyons.


i'll see you around and good luck with your build!

Last edited by punchjamesarnol; 04-21-2013 at 07:22 PM.
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Old 04-21-2013, 07:37 PM   #6
GDB FAN
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Old 04-21-2013, 09:33 PM   #7
pippen
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Quote:
Originally Posted by A-man07 View Post
If you want 500whp you should run a GT35 turbo and a FMIC. Do a rotated build as your research here is faulty, it is worth every bit of it. Ditch the GS AOS. Completely inadequate for this build.
I mainly based my research off this Unabomber quote from another thread

Quote:
There is no such thing as lower spool up and better top end in the turbo world. From the Turbo FAQ:

What is a rotated mount turbo? Any turbo that's physical size prevents mounting in the stock location. They also generally have larger than an OEM inlet size which necessitates TGV deletes and a larger turbo inlet pipe. They also require custom exhaust components and generally use an external wastegate set-up.

Did you need more information that this? If so, there is none. Rotated is ONLY done to use a top mount or for the bling of saying rotated as if cocking the turbo gives you some mythical gains. It's a huge waste unless you need to rotate it.
Am I missing something? seems like a tmic would eliminate a tiny bit o lag vs the front mount.. would the fmic be worth it?

Last edited by pippen; 04-21-2013 at 09:38 PM.
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Old 04-21-2013, 09:36 PM   #8
pippen
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Quote:
Originally Posted by punchjamesarnol View Post
I agree ^^^ with the fuel system. Your car is gonna be a beast! I had Steve build my block as well, same parts and the closed decking still holding strong. His son was my neighbor when I lived in Santee. LOL! I have my car down at Speed Force Racing at the moment getting my Walbo400 hard wired. If I had the chance to do it all again, I would have done head work and got some mid-range cams to suit my driving style in the canyons.


i'll see you around and good luck with your build!
thats good to hear man.. is it too sketchy running the stock heads at this point or would you do the cams just for the extra juice? and what else are you thinking for the fuel system? don't know too much about cams but i also hear they have a tendency to lose some bottom end..

Last edited by pippen; 04-21-2013 at 09:41 PM.
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Old 04-21-2013, 09:40 PM   #9
Ryan321
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If your worried about piston slap I suggest cosworth 99.75 pistons plus they are so much better designed just look at the pictures. I'm personally not a fan of cams, just go 1mm port and polished heads.
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Old 04-21-2013, 09:59 PM   #10
punchjamesarnol
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I like being in the upper rpm's for a lot of my driving, especially when throttling out of a turn and having that extra range ( I wish I could rev her to 9000 without blowing her up LOL!!!) . Time to step it up to a Walbro 400 or a 465 if your chasing 500HP.
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Old 04-21-2013, 10:23 PM   #11
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You might want to regroup on your fuel system if you're going to run ethanol.
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Old 04-22-2013, 09:13 PM   #12
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Quote:
Originally Posted by costabkz View Post
You might want to regroup on your fuel system if you're going to run ethanol.
Agreed. As for the headers, I would suggest a stock PNP. With the new headers you won't get much per price then depending on the turbo you may want to check out the header sticky. http://forums.nasioc.com/forums/showthread.php?t=601219
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Old 04-22-2013, 10:58 PM   #13
pippen
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Quote:
Originally Posted by Ryan321 View Post
Agreed. As for the headers, I would suggest a stock PNP. With the new headers you won't get much per price then depending on the turbo you may want to check out the header sticky. http://forums.nasioc.com/forums/showthread.php?t=601219
I've read that article before and just skimmed through it again and didn't find anything that pointed me away from an aftermarket header other than increased spool time?? I can't see it being worse than the stockers even with a pnp?

About the fuel system, what would you guys recommend?
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Old 04-23-2013, 12:28 AM   #14
renaktcj
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I'm personally not a fan of cams, just go 1mm port and polished heads.
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Old 04-23-2013, 08:17 AM   #15
scby rex
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Good luck making 500 wheel on stock cams and a 3076 .
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Old 04-23-2013, 08:48 AM   #16
nick516
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da fuhk is the piicturesss?
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Old 04-23-2013, 02:11 PM   #17
Preludecris
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why do you want 500 whp on a car that's a DD anyway?
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Old 04-23-2013, 02:34 PM   #18
jdm25rs
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Why is this in the member car gallery and not proven power?
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Old 04-24-2013, 07:35 AM   #19
Ryan321
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Quote:
Originally Posted by pippen View Post

I've read that article before and just skimmed through it again and didn't find anything that pointed me away from an aftermarket header other than increased spool time?? I can't see it being worse than the stockers even with a pnp?

About the fuel system, what would you guys recommend?
I don't have much experience with fueling systems, nor E85 as we done have it over in western mass. I was doing research as I'm working on installing the Perrin fuel rails now and I wish I went with a aero motive or used APS system.
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Old 04-24-2013, 07:36 AM   #20
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Quote:
Originally Posted by jdm25rs View Post
Why is this in the member car gallery and not proven power?
Because its not proven power nor is it a complete build.
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Old 04-24-2013, 07:51 AM   #21
sc00by4life
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nor does it have pictures.

bad.
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Old 04-24-2013, 10:19 AM   #22
vinncent_25
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this should go to build motor discussion
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Old 04-24-2013, 10:57 AM   #23
xluben
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Quote:
Originally Posted by costabkz View Post
You might want to regroup on your fuel system if you're going to run ethanol.
He'll definitely need more injector to make 500WHP on E85, but a simple in tank pump can get close. Here's ~500WHP with a DW300.

http://forums.nasioc.com/forums/show....php?t=2432563

Quote:
Originally Posted by scby rex View Post
Good luck making 500 wheel on stock cams and a 3076 .
A GT3076 might be tough, but a GTX should do it easily. Here's mid-500's with a GTX 3076 and stock cams.

http://forums.nasioc.com/forums/show....php?t=2456466

I'm making around 600WHP with stock cams right now, but my turbo is quite a bit larger.
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Old 04-24-2013, 12:42 PM   #24
scby rex
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Cams would make it easier to make the power. Yeah this doesnt belong in here.
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Old 04-24-2013, 04:58 PM   #25
pippen
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Thanks for the info on that xluben.. The guy building my motor will be back this weekend so hopefully I'll get a chance to get some pictures of the damage to the piston and what not. Threads not in proven power because it's not proven, I'm in the process of building the car (internals + bolt on) and thought the car gallery would best fit.

I'm researching fuel system options right now, thanks again.
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