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79 Posts
Discussion Starter · #1 · (Edited)
586 AWHP @ 22 PSI E85 ONLY!

5300 ft. Elevation
Ambient Temp = 62








2006 Subaru STi

Garrett - T4 Twin Scroll GT4088-R, 1.08A/R Ex.
Full-Race - Twin Scroll Exhaust Manifold + TS Up-Pipe

RAW Performance - Stage 5, 2.5 Liter STi semi-closed deck case, Darton Ductile Iron Sleeve Liners,
Modified forged EJ257 crankshaft ,High Performance Main & Rod Bearings, Custom Pauter Machine Forged Rods,
Custom & Coated CP Forged Pistons, High Performance Piston Rings, Fully Balanced & Blueprinted, 9,500 Rev Limit Recommended*

Cosworth- Head Specifications:
* CNC Ported/Machined finish port
* New Castings
* Hand blended finish work
* Intake 14.63% (average) 22% (max) increased flow
* Exhaust 30.56%(average) 41% (max) increased flow
* 4-angle Inlet Valve job
* 3-angle & radius Exhaust Valve job
* Valves are lapped
* Back-Cut Inlet Valves
* Heads are Ultra Sonic cleaned prior to assembly
* Heads are Serialized and sport a machined Cosworth logo
* +1mm Stainless Steel Intake Valves (1800 degrees max.)
* +1mm Inconel Exhaust Valves (2400 degrees max.)
* Performance Valve Springs
* Titanium Retainers
* Hardened Steel Spring Platforms
* Knife edged ports

Cosworth- Cams 278 Intake, 274 Exhaust

The graph says 24.88 PSI but my Defi gauge read 22 and the Hydra read the same. We could have cracked 600 on 22psi. But because we were losing fuel pressure up top we never tried. The twin in-tank fuel system I am using works great! But the Buschur Modified Walbro's are failing.
 

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LSX EVERYTHING
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7,517 Posts
Cleeaan! But that graph says 24.88psi!!!!! lol Sick car man. haha just read what you wrote at the bottom.
 

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DROP WEIGHT!!!
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3,910 Posts
Thats one nice looking car nice numbers
 

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89 Mustang GT HO hatchback
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72 Posts
bad fukkin ass man.....to be expected the buscher modified walsbro not producing, sweet ass numbers tho bro
 

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5th Gear
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7,052 Posts
Damn good numbers buddy. Do you have a tq graph or a graph with RPM instead of mph? Just curious how high you are spinning that bitch?
 

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79 Posts
Discussion Starter · #12 · (Edited)
Damn good numbers buddy. Do you have a tq graph or a graph with RPM instead of mph? Just curious how high you are spinning that bitch?
I am shifting at 7k right now. Fuel pressure has to be taken care of before I take her to 9k!

I'm seeing full-boost by 4300 and the correction factor makes 490ish AWHP at these levels.
 

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GetSOM!!!
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1,460 Posts
Nice. Car looks good. And a whole list full of mods. Good numbers too.
 

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FUCK FOURLOKO!!
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10,258 Posts
I am shifting at 7k right now. Fuel pressure has to be taken care of before I take her to 9k!

I'm seeing full-boost by 4300 and the correction factor makes 490ish AWHP at these levels.
wow that is badass. Your 4 cylinder is making as much power if not a little more than my turbo 347 and I realize your still short shifting. Must be a fun car to drive.:driving:
 

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Discussion Starter · #20 ·
The car feels great! Right now I'm running around on the WG spring boost (~15 PSI, 500ish WHP). I'm going to try to make it to Dion's tomorrow night too.
 
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