91 5.7L TPI, timing specs?
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From: Beautiful BC
Car: '88 IROC-Z / '91 Z28 / '91 GTA
Engine: LT4 Hot Cam 305 / L98 355 / MR 383
Transmission: 5-spd / 700R4 / 700R4
Axle/Gears: 3:45 / 3:23 / 3:23
91 5.7L TPI, timing specs?
what are the stock timing specs for this car.. the decal is long gone and I can't seem to find it in my shop manual. if I recall it was 6deg btdc for my 5.0L TPI iroc, is it the same for the 5.7?
I'm trying to get a bit more power out of this car, today I check the fuel pressure and found it is good at 44psi, and the timing is set to 0.
I'm trying to get a bit more power out of this car, today I check the fuel pressure and found it is good at 44psi, and the timing is set to 0.
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From: ocklawaha FL.
Car: 81z-28,89gta,91z-28 03 1500
Engine: 355,L98vette tpi,327
Transmission: TH350/700R4/700r4/4l80E
Axle/Gears: 3;73/3;27/2;73/3;73
Re: 91 5.7L TPI, timing specs?
I believe the timing specs from 305 and 350 are the same on tpi cars.
Joined: Nov 2000
Posts: 1,022
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From: Newington, CT
Car: 88 IROC
Engine: 5.7 RamJet
Transmission: T56
Axle/Gears: Dana44 4.10
Re: 91 5.7L TPI, timing specs?
Funny I just did the same on mine. Owned it for 4 years now, and done a bunch of work but never checked the timing. Doh! Mine was at 1*
Stock for the L98s is the same as the 305, 6*
I'm headed to the track tomorrow night.. lol maybe I'll pick up an extra tenth
Stock for the L98s is the same as the 305, 6*
I'm headed to the track tomorrow night.. lol maybe I'll pick up an extra tenth
Thread Starter
Supreme Member
iTrader: (25)
Joined: Jul 2004
Posts: 2,623
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From: Beautiful BC
Car: '88 IROC-Z / '91 Z28 / '91 GTA
Engine: LT4 Hot Cam 305 / L98 355 / MR 383
Transmission: 5-spd / 700R4 / 700R4
Axle/Gears: 3:45 / 3:23 / 3:23
Re: 91 5.7L TPI, timing specs?
thanks guys
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Joined: Jan 2010
Posts: 19
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From: hartsville Tn 37074
Car: 90 Iroc-z tune port 350 mod
Engine: TPI 350 chipedout neck breaker tran
Transmission: 700R4 built
Axle/Gears: 7.5 10 bolt rear end
Re: 91 5.7L TPI, timing specs?
here is a little infor for you guys its at 6 but if you want to get just a little more power out of you time and valve tran you can more it up to about 8 or 9 and you will see a big difference
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