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12-06-2012, 02:41 PM | #76 |
Scooby Specialist
Member#: 5591
Join Date: Apr 2001
Chapter/Region:
MWSOC
Location: Westerville, Ohio, USA
Vehicle:2002 WRX EJ257 Gt35r |
You can see even in this lower power testing that the manifold was just starting to work. It just needed to be revved higher.
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12-06-2012, 03:39 PM | #77 |
Scooby Specialist
Member#: 104200
Join Date: Jan 2006
Chapter/Region:
TXIC
Location: Austin TX
Vehicle:000 WHP BUGEYE Street Proven Performance |
I have an cosworth manifold here. If someone can get me an adapter plate for a drive by cable throttle body, I can throw it on and get some comparison data
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12-06-2012, 11:38 PM | #79 |
Scooby Guru
Member#: 170602
Join Date: Jan 2008
Location: j-ville fl
Vehicle:06 Wrx RWD Auto 76MM-AEM-2200's |
I believe it Clark. Personally I think on a 700 whp car the gains would be closer to 70 whp or more past say 6500 rpm but didn't wanna post that! Sounds crazy but these things flow well up top.
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12-07-2012, 02:49 AM | #80 |
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Member#: 118815
Join Date: Jun 2006
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This is mine
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12-07-2012, 09:59 AM | #81 |
Scooby Specialist
Member#: 104200
Join Date: Jan 2006
Chapter/Region:
TXIC
Location: Austin TX
Vehicle:000 WHP BUGEYE Street Proven Performance |
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12-07-2012, 10:53 AM | #82 |
Scooby Specialist
Member#: 165104
Join Date: Nov 2007
Chapter/Region:
SCIC
Location: Riverside CA
Vehicle:E85 SoCalPorting Owner |
Does the hood close with the IAC? I know this way you'll have to do the ac delete. Thanks
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12-07-2012, 02:24 PM | #83 |
Scooby Newbie
Member#: 118815
Join Date: Jun 2006
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Im in the UK and my tuner did during the engine install, bonnet closes perfectly not catching at all
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08-31-2013, 02:24 PM | #84 |
Scooby Specialist
Member#: 57064
Join Date: Mar 2004
Vehicle:2008 STi IAG built HTA86 E85 Kel272s Cos IM |
bump
any further testing? |
08-31-2013, 02:32 PM | #85 |
Former Vendor
Member#: 178047
Join Date: Apr 2008
Chapter/Region:
SWIC
Location: AZ
Vehicle:02 WRX STI Spec C Black |
I have tested dozens of them now. Not recommend for street cars under 7000 rpm or 500hp. The loss in midrange power can be huge. Back to back testing on a GT35R was almost a full 1000 rpm later trq peak. Under 5000 rpm cars loose huge power and trq. Gains are 6500 and up for drag or high rpm setups. Road racing or drag racing? The manifold will help. Street? Forget it.
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08-31-2013, 03:20 PM | #86 | |
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MWSOC
Location: Xona 78•64 UHF
Vehicle:2002 WRX V9 6mt R180 Brembos |
Quote:
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08-31-2013, 04:38 PM | #87 |
Scooby Specialist
Member#: 57064
Join Date: Mar 2004
Vehicle:2008 STi IAG built HTA86 E85 Kel272s Cos IM |
Great insight indeed
Although I have 35R, PnP heads, Kelford 272s, +1mm bigger valves, I will stick with the stock IM since 99.9% of my driving is on the street |
03-28-2014, 06:21 PM | #88 |
Scooby Specialist
Member#: 57064
Join Date: Mar 2004
Vehicle:2008 STi IAG built HTA86 E85 Kel272s Cos IM |
Not the exact ideal comparison due to differences in boost that was negated by differences in temperature but you get the idea :tup: Driving impressions after Cosworth IM: 1. Turbo spool sounds 25% louder 2. Drives like stock at part throttle just like before. 3. Yes, the lag is definitely noticeable at WOT tip-in but it is not a deal breaker at all. The fact that I went with an HTA86 turbo, big heads/valves/cams already means that I am too far gone at trying to hold on to any low end. Might as well make the most of the top end! 4. The top end, oh yes the top end Basically I picked up 23-26whp/11wtq at every single rpm after 4500rpms according to the dyno graph. The top end is just downright BRUTAL now :tup: 5. Would I recommend the Cosworth IM? I would ONLY advise it to people with turbos at >70lb/min + headwork + running >30psi AND who operate at high rpms for lengthy periods (road racing or drag). __________________________________________________ ________________ This is the interesting graph on straight 93 octane, boost is the same but varied greatly on ambient temperatures. Impressions: 1. Even at 25psi, the Cosworth IM is still not able to "wake up". There are huge losses of power down low and shifting of the curve to the right. 2. I wouldn't say I lost power with the Cosworth IM because you have to account for the temperatures differences in the tunes but certainly the benefits of the Cosworth IM on low boost are marginal at best. 3. The OEM STi manifold is fantastic and I would recommend keeping it if you are not building a drag/road racer. My mods for reference: IAG V-band rotated turbo kit - HTA86 0.82 Tial V band housing - IAG FMIC kit with Spearco core and bumper beam - IAG 4" Intake - IAG V-band Uppipe - IAG V-band Catless Downpipe - Tial 44mm External Wastegate with open dump - GT Spec Equal Length Headers V-band with Uppipe - Harman Motive Catback Exhaust - Aquamist HFS-6 running Boost Juice (50% methanol/50% water) - Injector Dynamics 2000cc injectors - Aeromotive 340lph Fuel Pump - Aeromotive Fuel Pressure Regulator - IAG Fuel Rails - Grimmspeed Electronic Boost Control Solenoid - Grimmspeed Thermostat - Mishimoto Radiator - Tial Q BOV - LFR7AIX Spark Plugs - IAG Catchcan - Stock Air Pump deleted - IAT sensor and 4 Bar MAP sensor - Cobb Accessport Speed Density protuned by Jorge IAG Stage 2 Bottom End (25,000 DD miles and counting... Built by Artie at IAG) - Manley Platinum Series 99.5mm Piston Set - Manley H-Beam Rods - ACL Main and Rod Bearings - OEM Nitrided Crank - OEM 11mm Oil Pump - Killer B Oil Pickup with Baffle - Gates Racing Timing Belt Kit - 12,000mile/1year warranty IAG Stage V Heads (25,000 DD miles and counting... Built by Artie at IAG) - Flipped Cosworth Manifold with retained Air Conditioning - ARP2000 Head Studs - OEM Headgasket - Manley Extreme Duty 33mm Exhaust Valve Set - Manley Race Flow 37mm Intake Valve Set - Manley Valve Spring and Retainer Kit - IAG Stage V headwork with Multi Angle Valve Job/Port&Polish - Kelford Dual AVCS 272/268 11.30/11.50mm Lift Street Cams - Cosworth Phenolic Spacers - IAG TGV Deletes |
03-28-2014, 08:41 PM | #89 |
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Join Date: Jan 2011
Location: BagEnd
Vehicle:7/2 STi/WRX wagon SWP/AW |
Great that you updated the thread with your results. Also good to have this truly great thread bumped that contains comments from some of the best ever Subie tuners in this country.
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