544.5 whp Cosworth Heads, 50/50 Water/Meth "low boost"

**Siegel Racing** · 05-24-2006, 11:07 AM

Well, it appears the Cosworth heads are well worth it

Other mods were:

FP Red, Perrin FMIC, Perrin Modded injectors, Snow kit with "some tweaks." Perrin BigMaf, WJM TGV deletes and a few other little things.

On 11 psi (staying under the meth spray) it made 330 whp.
At 22 psi it made 445 whp.

We were OUT of time so all we were shooting for was top end, to see where it went. With the AVC-R doing all the work (slow ramp to full boost), and NEVER spraying the FMIC, at 29 psi it made:

We had planned on going to 34 psi or so, but the manager here said that if I didn't have car outside the gate in 20 minutes they were locking us in...

We'll have it back on the dyno in a few weeks.

The torque is low because of the AVC-R settings. It wasn't making full boost until up top, but that was all we were playing with at the moment.

SS

***520*** · 05-24-2006, 11:24 AM

What did you make power wise before the heads?

Also what octane?

Nice job.

**Siegel Racing** · 05-24-2006, 11:26 AM

^^^ Never tested before the heads with this turbo, but similar cars make 480ish...

Good point about the octane, straight 93, plus the water/meth.

SS

***520*** · 05-24-2006, 08:23 PM

nice work.

luSTI · 05-24-2006, 08:39 PM

Well I made 485whp, but I am running 28psi tapering to 25psi, so essentially I am running 25psi as far as hp numbers are concerned. I havnt seen any other FP Reds on meth with an EWG that have held 28psi+ to redline before this one. All the others have either tapered down like mine (because of the internal WG), the clutch has started slipping, or it has started misfiring horribly uptop so they couldnt get final numbers. Not to put down your results because 545whp is a VERY nice number. Just adding some imput since you said this car hadnt been dynoed before the heads.

burnin4 · 05-27-2006, 08:55 AM

congrats!

modifyd · 05-27-2006, 09:09 AM

Quote:

Originally Posted by luSTI

Well I made 485whp, but I am running 28psi tapering to 25psi, so essentially I am running 25psi as far as hp numbers are concerned. I havnt seen any other FP Reds on meth with an EWG that have held 28psi+ to redline before this one. All the others have either tapered down like mine (because of the internal WG), the clutch has started slipping, or it has started misfiring horribly uptop so they couldnt get final numbers. Not to put down your results because 545whp is a VERY nice number. Just adding some imput since you said this car hadnt been dynoed before the heads.

The car with stock heads and the FP green on 93 octane and 50/50% water meth mix was tuned on Topspeed's dyno. Doug got that 3" green to put out 452whp and 460trq. The only thing that changed was the turbo,heads and cams.

***520*** · 05-27-2006, 09:09 AM

what tweaks were done to the meth inj. kit?

modifyd · 05-27-2006, 09:13 AM

Quote:

Originally Posted by 520hpSTi

what tweaks were done to the meth inj. kit?

No tweaks just a snowperformance kit spraying a 50/50 mix.

05-24-2006, 11:07 AM	#1
Siegel Racing Authorized Vendor Car: Your STi ;) Fav Mod: Everything Location: Atlanta Posts: 1,280 IWSTI Addict since: Mar 2005 Trader Rating: (2)	544.5 whp Cosworth Heads, 50/50 Water/Meth "low boost" Well, it appears the Cosworth heads are well worth it Other mods were: FP Red, Perrin FMIC, Perrin Modded injectors, Snow kit with "some tweaks." Perrin BigMaf, WJM TGV deletes and a few other little things. On 11 psi (staying under the meth spray) it made 330 whp. At 22 psi it made 445 whp. We were OUT of time so all we were shooting for was top end, to see where it went. With the AVC-R doing all the work (slow ramp to full boost), and NEVER spraying the FMIC, at 29 psi it made: We had planned on going to 34 psi or so, but the manager here said that if I didn't have car outside the gate in 20 minutes they were locking us in... We'll have it back on the dyno in a few weeks. The torque is low because of the AVC-R settings. It wasn't making full boost until up top, but that was all we were playing with at the moment. SS This ad is not endorsed by this member. Please register or login to hide this ad.

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05-24-2006, 11:24 AM	#2
*520* STi > EVO... Wait what??? Car: 03 EVO Fav Mod: stock :( Location: Michigan / Saint Louis Posts: 12,393 IWSTI Addict since: Oct 2005 Trader Rating: (1)	What did you make power wise before the heads? Also what octane? Nice job.

05-24-2006, 11:26 AM	#3
Siegel Racing Authorized Vendor Car: Your STi ;) Fav Mod: Everything Location: Atlanta Posts: 1,280 IWSTI Addict since: Mar 2005 Trader Rating: (2)	^^^ Never tested before the heads with this turbo, but similar cars make 480ish... Good point about the octane, straight 93, plus the water/meth. SS

05-24-2006, 08:23 PM	#4
*520* STi > EVO... Wait what??? Car: 03 EVO Fav Mod: stock :( Location: Michigan / Saint Louis Posts: 12,393 IWSTI Addict since: Oct 2005 Trader Rating: (1)	nice work.

05-24-2006, 08:39 PM	#5
luSTI Spec C Club Car: 05 Subaru WRX STi Fav Mod: FP Red and Meth Location: Charlotte, NC Posts: 1,192 IWSTI Addict since: Mar 2005 Trader Rating: (2)	Well I made 485whp, but I am running 28psi tapering to 25psi, so essentially I am running 25psi as far as hp numbers are concerned. I havnt seen any other FP Reds on meth with an EWG that have held 28psi+ to redline before this one. All the others have either tapered down like mine (because of the internal WG), the clutch has started slipping, or it has started misfiring horribly uptop so they couldnt get final numbers. Not to put down your results because 545whp is a VERY nice number. Just adding some imput since you said this car hadnt been dynoed before the heads.

05-27-2006, 08:55 AM	#6
burnin4 Spec C Club Car: 10 sec STi, 08 Z06 Fav Mod: TopSpeed Posts: 1,010 IWSTI Addict since: Aug 2004 Trader Rating: (3)	congrats!

05-27-2006, 09:09 AM	#8
*520* STi > EVO... Wait what??? Car: 03 EVO Fav Mod: stock :( Location: Michigan / Saint Louis Posts: 12,393 IWSTI Addict since: Oct 2005 Trader Rating: (1)	what tweaks were done to the meth inj. kit?