350 upgraded injectors

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Jun 13, 2012 | 12:01 AM

Zachnoel

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350 upgraded injectors

Hi,
I am doing some upgrade to my 350 TPI. I am adding VORTEC heads, shorty headers, extreme energy comp roller cam, large runners and aftermarkets throttle body. Will I be making enough HP that I will should upgrade my fuel injectors to 24.9lb or will the 22lb injectors be ok?
thanks

Jun 13, 2012 | 02:05 PM

five7kid

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From: Littleton, CO USA

Car: 82 Berlinetta/57 Bel Air

Engine: L92/LQ4 (both w/4" stroke)

Transmission: 4L80E/4L80E

Axle/Gears: 12B-3.73/9"-3.89

http://www.watkinsmotorsports.com/Fu..._required.aspx

You may want to go larger to avoid going 100% duty cycle.

Jun 14, 2012 | 10:52 AM

Jim85IROC

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From: Readsboro, VT

Car: 85 IROC-Z / 88 GTA

Engine: 403 LSx (Pending) / 355 Tuned Port

Transmission: T56 Magnum (Pending) / T5

Axle/Gears: 3.42 / ?

Re: 350 upgraded injectors

Another alternative is to install an AFPR and bump your pressure up a tad.

Jun 14, 2012 | 11:50 AM

Street Lethal

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From: NYC / Jersey

Car: 1990 Trans Am GTA

Engine: Turbo 305 w/MS2

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Re: 350 upgraded injectors

Quote:

Originally Posted by Zachnoel

I am doing some upgrade to my 350 TPI. I am adding VORTEC heads, shorty headers, extreme energy comp roller cam, large runners and aftermarkets throttle body. Will I be making enough HP that I will should upgrade my fuel injectors to 24.9lb or will the 22lb injectors be ok?

Bump up your fuel pressure until your INT/BLM are averaging 128 BLM. To be honest though, with these types of upgrades, duty cycle and the air/fuel ratio aren't the only thing you should be concerned about. I would look into a better prom because your Acceleration Enrichment as well as your Spark Advance will need some tweaking to maximize those modifications...