Okay I have a vortec long block with everything ecept the intake and I want a TPI setup on it. Would the HP/Tq be estimated for a Stock 5.7 Vortec with the TPI intake on it??
Senior Member
formula_novice
Senior Member
close
May 22, 2019
- Join DateSep 2003
- LocationSt. Louis, Missouri
- Posts:988
- iTrader Positive Feedback100
- iTrader Feedback Score(1)
- Car1989 Firebird Formula
- Engine383 Stealth Ram
- Transmission700R4
- Axle/Gears3.73 9 bolt Posi
- Likes:0
- Liked:0 Times in 0 Posts
Its hard to estimate power when you haven't given any information on the "Stock 5.7 Vortec" (year, vehicle, etc). Without knowing that, nobody knows the base power you are starting with.
If you do a search, you will find Vortec TPI information has been covered many, many times.
Best of luck.
If you do a search, you will find Vortec TPI information has been covered many, many times.
Best of luck.
Senior Member
I think the L31 engine developed either 265 or 285 hp in the pickup. I think it was 285.
Kevin91Z
Moderator
close
Mar 23, 2026
- Join DateJul 1999
- LocationOrange, SoCal
- Posts:10,950
- iTrader Positive Feedback100
- iTrader Feedback Score(1)
- Car1990 Pontiac Trans Am
- Engine355 TPI siamesed runners
- TransmissionTremec T56
- Axle/Gears12-Bolt 3.73
- Likes:115
- Liked:26 Times in 22 Posts
With the tiny cam in the Vortec trucks (about 194/198), I would say it would make about the same amount of power as a regular TPI engine. Put in a L98 or LT1 camshaft and you'd see about 20 more HP.
Supreme Member
i have a 96 vortec stock engine with tpi on it and it has 305 hp at the crank when it was dynoed