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Old 01-28-2013, 11:32 AM   #1 (permalink)
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Default 4EAT drivetrain losses

So, I'm getting my car built:

- EJ 25 Block is getting built, forged parts
- Tomei 7960 turbo
- Tomei equal length headers
- Tomei up pipe
- Cobb intake
- Koyo radiator
- Cobb catless down pipe, STi cat back

That's pretty much the long and the short of it. At least from the performance standpoint! A previous tune with a VF34 turbo, Cobb downpipe and STi cat back saw 240 whp and 280 wtq on 91.

So, I'm hoping this time around to get 350 whp on 94 instead of 91. Any guesses what I should see? I hear some pretty wildly varying guesses for drivetrain losses on the 4EAT!
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Old 01-29-2013, 05:40 AM   #2 (permalink)
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stock tranny?

350awhp/tq will be pushing it
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Old 01-29-2013, 06:35 AM   #3 (permalink)
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Default 4EAT drivetrain losses

Yeah, it will be. But I'm not launching or anything. Most of the fun will be had at speed. Until my tranny gets built this summer. My main question was whether my goal is attainable with the parts I have going in!
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Old 01-29-2013, 06:43 AM   #4 (permalink)
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Default 4EAT drivetrain losses

Flow rate on the turbo is about 50 lbs/min as well.
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Old 01-29-2013, 06:56 AM   #5 (permalink)
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I have a 43 lbs/min turbo, and I have a very conservative 17psi tune, and I'm getting 305 - 310 whp. My tuner thinks on a 19-20 psi tune, I could put down 320whp, so 350 whp should be attainable with a 50 lbs/min turbo.
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Old 01-29-2013, 08:07 AM   #6 (permalink)
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Default 4EAT drivetrain losses

Awesome, I know I'll be satisfied regardless. Got some BC racing coilovers with swift springs, white line sways, STi seats and a few other things going in as well to go with my STi bumper. Updates to follow!
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Old 01-29-2013, 09:58 AM   #7 (permalink)
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Default 4EAT drivetrain losses

What fuel are you running?
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Old 01-29-2013, 10:22 AM   #8 (permalink)
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93 Octane
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Old 01-29-2013, 08:51 PM   #9 (permalink)
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How much did that turbo run you?
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Old 01-29-2013, 11:01 PM   #10 (permalink)
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Default 4EAT drivetrain losses

I got it for 1300.00 new!

93 eh? Awesome.
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