how much hp can i get from these injectors

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Jun 27, 2006 | 10:51 PM

camarodrew

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Joined: Jun 2006

Posts: 105

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From: dallas ga

Car: 91 rs

Engine: 350

Transmission: 700r4

Axle/Gears: 4.10

how much hp can i get from these injectors

i have a 91 rs with a 350 tbi the motor has a 305 tbi and computer and i was wandering if i baught some injectors that were at like 61lb ph and and some kind of computer upgrade how much power would i get sorry if i cant be more specific but im more of a carb guy

Jun 27, 2006 | 11:34 PM

Gladstoneiroc

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Joined: Mar 2003

Posts: 1,149

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From: Gladstone, Missouri

Car: 91 Camaro RS

Engine: 5.0L TBI (ebl inside)

Transmission: T-5

Axle/Gears: 3.42 lsd 10 bolt

So you have a 350 motor with the factory 305 injectors and ecm (prom)? With that setup and the factory fuel pressure you are probably pretty darn lean.
A good start would be using 350 injectors and a 350 prom. Or you could do an adjustable fuel pressure regulator. The best solution would be a custom chip, 350 injectors, and afpr.

Jun 28, 2006 | 09:59 AM

Casey Butt

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Joined: Jun 2006

Posts: 307

Likes: 2

From: Troy, MI

Car: 1988 IROC-Z TBI

Engine: L04.3 = 305-310-336

Transmission: TH-700R4

Axle/Gears: 10-bolt, 3.42 posi

Quote:

Originally Posted by camarodrew

if i baught some injectors that were at like 61lb ph and and some kind of computer upgrade how much power would i get?

The injectors themselves won't make any more hp, but with the stock fuel line pressure they can "support" between 205 and 230 hp (assuming a max 85% duty cycle). If you crank the fuel pressure up to 20 psi they should be good for 255-285 hp.