timing a 350 5.7

D

drem312

Petty Officer 1st Class
Joined
May 16, 2003
Messages
209
Just installed a 1989 long block reman . It's a Gm 350 5.7 Omc set up it has the petronix ignition set up. The motor has the flat tappet lifters. I set the timing at 10 btdc the total is 32 and I'm burning 93 octane gas . Do these numbers sound right ? The motor does run well . If I move the throttle too quickly there's a slight bog with the Rochester quadrajet
 
L

LAC_STS

Master Chief Petty Officer
Joined
Jul 1, 2010
Messages
895
Re: timing a 350 5.7

I thought the correct initial timing was 8 BTDC with 89 or higher octane fuel, and 2 BTDC with under 89. At least thats in my book.
 
chriscraft254

chriscraft254

Commander
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Jun 4, 2011
Messages
2,445
Re: timing a 350 5.7

Drem, LAC_STS is correct, it should be 8 btdc and you should not have to run premium gas.
 
Don S

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: timing a 350 5.7

Improper idle mixture will also cause a slight hesitation.
 
D

drem312

Petty Officer 1st Class
Joined
May 16, 2003
Messages
209
Re: timing a 350 5.7

It really didn't want to idle at 8 I can try it again . Is 32 total bad?
 
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