tbi horsepower
12-07-2008, 10:05 PM
#1
Junior Member
Thread Starter
Join Date: Mar 2007
Location: Staten Island, NY
Posts: 59
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1984 Camaro Z28
Engine: 350 from an elcamino
Transmission: stock t-5
Axle/Gears: 10 bolt 3.73 limited slip
tbi horsepower
How much horsepower can a tbi setup with a 670 holley throttle body, on a carb intake support? I was planning on using a 16197427 pcm with the maf conversion.
12-08-2008, 06:46 PM
#2
Junior Member
Join Date: Aug 2008
Location: texas
Posts: 26
Likes: 0
Received 0 Likes
on
0 Posts
Car: no, truck
Engine: 5.7 tbi
Transmission: 4l60e
Axle/Gears: ?
Re: tbi horsepower
i have heard that only 275 fwhp. im sure that it can support more than that but i cant prove it. my guess is around 350 fwhp with the psi at 25.
12-08-2008, 08:19 PM
#3
Supreme Member
iTrader: (2)
Join Date: Jan 2005
Location: Hurst, Texas
Posts: 10,119
Received 428 Likes
on
368 Posts
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: tbi horsepower
285 FWHP is the specification from Holley. The stock type GM injectors can push more fuel than the Holley injectors. Running on a BBC TBI, it can make more power than the Holley, over 450 FWHP is possible with a single 2bbl TBI unit.
12-08-2008, 08:35 PM
#4
Senior Member
Join Date: Nov 2006
Posts: 495
Likes: 0
Received 0 Likes
on
0 Posts
Re: tbi horsepower
I can say personally that a stock throttle body and injectors will support 300+hp. My current combo makes 300 crank hp and that is with a stock but ultimate modded throttle body and 61lbs inj at 20psi. Pretty sure I still have a little room to spare.
12-09-2008, 12:00 AM
#5
Junior Member
Join Date: Aug 2008
Location: texas
Posts: 26
Likes: 0
Received 0 Likes
on
0 Posts
Car: no, truck
Engine: 5.7 tbi
Transmission: 4l60e
Axle/Gears: ?
Re: tbi horsepower
is it possible to use the injector from the stock tbi (350 injectors)on top of the holley tbi?
12-09-2008, 09:53 AM
#6
Junior Member
Thread Starter
Join Date: Mar 2007
Location: Staten Island, NY
Posts: 59
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1984 Camaro Z28
Engine: 350 from an elcamino
Transmission: stock t-5
Axle/Gears: 10 bolt 3.73 limited slip
Re: tbi horsepower
well what about with the 454 injectors? Is the limitation air flow, or fuel flow?
12-09-2008, 10:29 AM
#7
Member
iTrader: (1)
Join Date: Jun 2006
Location: Wixom, MI
Posts: 156
Likes: 0
Received 0 Likes
on
0 Posts
Re: tbi horsepower
The GM injector pod can be made to work with the holley throttle body base, but it takes a little work. Read through the tbi stickies. There is a bunch of information on what is needed for higher power levels.
Thread
Thread Starter
Forum
Replies
Last Post
