400whp
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Joined: Mar 2002
Posts: 2,516
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From: San Antonio TX
Car: 1990 G92 IROC Z Miniram
Engine: 388cu 6.4 Liters
Transmission: G-Force T5
Axle/Gears: 3.73 Gears
400whp
The question I have is has anyone on TGO made over 400whp with a 355 TPI without S/C or NOS and with shorty headers?
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: 400whp
agree..don't recall seeing one. LT1's yes..quite common to see over 400whp with heads/cam/ported intake and I think I recall seeing one near 500whp with solid roller in a race setup. No reason a TPI based motor you guys build cant do the 400whp...but keeping it smog legal "legally" (read no special techs giving a sticker) is another story.
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Joined: Jul 2006
Posts: 811
Likes: 2
From: 4-22 / 7-25
Car: '91 Z28 L98 G92
Engine: Modded L98
Transmission: Modded 700R4
Axle/Gears: Modded 10-Bolt
Re: 400whp
When you or we say "TPI," just how true to a General Motors Tuned Port Injection induction are we talking? Almost immediately in the thread, the Super Ram, Mini Ram, Stealth Ram
, First intake, or a (mildly to wildly) modded LTR (TPiS, SLP, ACCEL...) set-up enters the equation. If the HSR qualifies, and I don't think it should, I missed 400 by three little stallions on one day, on one pull, on the same dyno that recent SoCal dyno testing / tuning has been done on. Please define "TPI." Thanx!
Bill
, First intake, or a (mildly to wildly) modded LTR (TPiS, SLP, ACCEL...) set-up enters the equation. If the HSR qualifies, and I don't think it should, I missed 400 by three little stallions on one day, on one pull, on the same dyno that recent SoCal dyno testing / tuning has been done on. Please define "TPI." Thanx!Bill
if only they knew 
Joined: Mar 2000
Posts: 5,703
Likes: 132
From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: 400whp
When you or we say "TPI," just how true to a General Motors Tuned Port Injection induction are we talking? Almost immediately in the thread, the Super Ram, Mini Ram, Stealth Ram, First intake, or a (mildly to wildly) modded LTR (TPiS, SLP, ACCEL...) set-up enters the equation. If the HSR qualifies, and I don't think it should, I missed 400 by three little stallions on one day, on one pull, on the same dyno that recent SoCal dyno testing / tuning has been done on. Please define "TPI." Thanx!
Bill
, First intake, or a (mildly to wildly) modded LTR (TPiS, SLP, ACCEL...) set-up enters the equation. If the HSR qualifies, and I don't think it should, I missed 400 by three little stallions on one day, on one pull, on the same dyno that recent SoCal dyno testing / tuning has been done on. Please define "TPI." Thanx!Bill
If you are specific, then GM type stock, or with aftermarket runners.
I think my setup will make the 400, as it did 389 with an auto and now it's in my stick car.
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Thread Starter
Supreme Member
iTrader: (2)
Joined: Mar 2002
Posts: 2,516
Likes: 5
From: San Antonio TX
Car: 1990 G92 IROC Z Miniram
Engine: 388cu 6.4 Liters
Transmission: G-Force T5
Axle/Gears: 3.73 Gears
Re: 400whp
Ok any aftermarket intake with the stock factory wire harness(7730 or 165 ECM)
Joined: Jul 1999
Posts: 12,088
Likes: 125
From: SALEM, NH
Car: '88 Formula
Engine: LC9
Transmission: 4L60E
Axle/Gears: 3.89 9"
Re: 400whp
A thread like this is better suited in the TPI forum. This forum is for is for alternative intakes.
-- Joe
-- Joe
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Joined: Apr 2008
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From: Wittman,Az
Car: 86 IROC-Z, '71 RS
Engine: 305 TPI/ 350
Transmission: 700R4/TH350
Re: 400whp
I think it's possible, but all the money (And a little luck.) that would be needed to do it, I think you are better off going with an LS swap.
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