350 Tuning Help

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01-10-2018
bgott

350 Tuning Help

Hi All,

I am about to build a TBI 5.7 with Vortec Heads/Intake (w/ adapter plate) and this camshaft. Has anyone else had a similar setup and tuned it? These are the heads and intake.

I am going to be running the Moates APU-1 and I'm thinking I will need to set the fuel pressure to 18PSI with a performance pump to supply adequate fuel.

Any information would be very helpful.

Thanks!
02-16-2018
dave w

I've tuned some "Vortec" 350 TBI engines. Usually stock 454 injectors and stock 454 fuel pressure will work fine. Stock 350 injectors with 18 psi is an option also.

I use the Ostrich 2.0 to tune with.

Sometimes there is a trade-off with TBI injectors, with either lean / rich at idle or lean / rich at upper RPM's. Sometimes the injector trade-off at idle is rich, but upper RPM's are great.

Seldom do the engines I tune get time on Chassis Dyno, but one of the Vortec 350 engines I tuned made 330 RWHP with stock 454 injectors and stock fuel pressure.

dave w
02-17-2018
kacy

Quote:

Originally Posted by bgott

Hi All,

I am about to build a TBI 5.7 with Vortec Heads/Intake (w/ adapter plate) and this camshaft. Has anyone else had a similar setup and tuned it? These are the heads and intake.

I am going to be running the Moates APU-1 and I'm thinking I will need to set the fuel pressure to 18PSI with a performance pump to supply adequate fuel.

Any information would be very helpful.

Thanks!

I have a cam with those spec by a different brand name I am still trying to tune. if you havent already contact a cam manufacture and tell them what you have and what you want it to do and they will recommend a cam. I didnt do this and think I may not be as happy as i thought with it.
02-17-2018
Fast355

Quote:

Originally Posted by bgott

Hi All,

I am about to build a TBI 5.7 with Vortec Heads/Intake (w/ adapter plate) and this camshaft. Has anyone else had a similar setup and tuned it? These are the heads and intake.

I am going to be running the Moates APU-1 and I'm thinking I will need to set the fuel pressure to 18PSI with a performance pump to supply adequate fuel.

Any information would be very helpful.

Thanks!

I have run 232/240 @ .050 on a 110 LSA in a 10.5:1 383 TPI with Vortec heads and SLP runners using the later 1993-1995 TBI PCM. The PCM can handle ALOT more cam than the so called experts claim.