1985 monte carlo ss must have timing set high to be abl


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1985 monte carlo ss must have timing set high to be able to run without cutting off

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X Beasty X
Anonymous Poster
shanedog3@bellsouth.net

Jan 25, 2008, 11:08 AM

Post #1 of 4 (2213 views)

1985 monte carlo ss must have timing set high to be able to run without cutting off	Sign In

I had my 1985 monte carlo ss worked on by an experienced mechanic about 2 days ago and he said he had to set the timing alot higher than usual to get it to stay running without cutting off. he told me that it was because of the high performance cam i put in it causing it to not produce enough vacuum to stay on at a regular timing, my monte carlo has a 305. h.o. engine. i posted this in hopes of getting any suggestions on any way i would be able to produce more vacuum without having to replace my cam. any help will be much appreciated and thanks for your time.

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 25, 2008, 12:44 PM

Post #2 of 4 (2212 views)

Re: 1985 monte carlo ss must have timing set high to be able to run without cutting off	Sign In

Now you have an aftermarket part (camshaft) in this. If you put that in what was suggested in the info on that cam?

The typical HP cams of yesteryear would make for a rough idle. That would be a reason to raise the idle speed a bit. The engine produces vacuum based on it's compression ratio which isn't changed by the cam. Is this person trying to find a new timing setting to match up with the cam and whatever octane rating is recommended for use with this set up? It's true that advancing the timing results in a higher vacuum reading at idle speed. To really increase that vacuum would be a total engine modification - you don't just dial it up with an adjustment??

T

Double J
Veteran / Moderator
Double J profile image

Jan 25, 2008, 1:17 PM

Post #3 of 4 (2207 views)

Re: 1985 monte carlo ss must have timing set high to be able to run without cutting off	Sign In

Just to add...

maybe lQQk into a higher stall speed torque converter...

Read this....click.....

then this- shows how to determine the stall speed you have...click

hope this helps

(This post was edited by JIM N on Jan 25, 2008, 3:22 PM)

Fatcat1981
Novice

Feb 14, 2008, 8:31 PM

Post #4 of 4 (2173 views)

Re: 1985 monte carlo ss must have timing set high to be able to run without cutting off	Sign In

Also you don't want a cam with a high duration for the street.

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