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Topic: Timing Advance

in Forum: C3 Engines

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Timing Advance (1/5)
4/19/14 11:00pm

KDADDY79
Former Member
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Dutchess County, NY - USA

Vette(s):
White '79 Corvette. It's a driver.

Joined: 8/27/2007
Posts: 2484

Since replacing the stock radiator with an aluminum radiator my '79 runs at appx. 160 degrees. Pretty cool!

Because it runs this cool, can I afford to make it run a bit hotter by advancing the timing a little? (I've heard advanced timing results in a better throttle response.)

A) Good idea.

B) If it ain't broke don't fix it.

Kevin

|UPDATED|4/19/2014 8:00:04 PM (AZT)|/UPDATED|

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Re: Timing Advance (2/5)
4/20/14 1:15pm

F4Gary

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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.

Joined: 8/26/2006
Posts: 1409

I thought advancing the timing made it run cooler, to a point.

I have my 72 LT-1 set at 17* using manifold vacuum.

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Re: Timing Advance (3/5)
4/21/14 12:59am

JohnRR
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Joined: 2/22/2011
Posts: 110

F4Gary said: I thought advancing the timing made it run cooler, to a point.

I have my 72 LT-1 set at 17* using manifold vacuum.

I agree with the above.

Running cooler engine temp may allow you to have your timing advance come in a little quicker without the engine pinging/knocking. This will give you better low end performance. Your total mechanical(no vacuum) advance should be around 36 degrees BTDC, all in by 3000 rpm. Are you using premium gas?

John

______________
1973 BB 4-Speed Coupe Project Car

2009 Z06 Mostly Stock

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Re: Timing Advance (4/5)
4/21/14 8:09pm

cthulhu

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Hot Springs, AR - USA

Vette(s):
69 Conv #'s match 427, TKO-600/.64, 3.36HD-Posi, HT, T/T, PS, PB, PW, SP, Leather, Comp XE264HR & Roller Rockers & Lifters, Air-Gap RPM intake, Holley St Av 770 VS, MSD 6AL+Dist+Blaster SS, K&N, Jet-Hot Hooker Side-Pipes, Steeroids, Al Rad, Spal Fans

Joined: 4/24/2004
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KDADDY79 said: Since replacing the stock radiator with an aluminum radiator my '79 runs at appx. 160 degrees. Pretty cool!

Because it runs this cool, can I afford to make it run a bit hotter by advancing the timing a little? (I've heard advanced timing results in a better throttle response.)

A) Good idea.

B) If it ain't broke don't fix it.

Kevin

I am an advocate of advancing as far as you can and as fast as you can without knocking.

______________

http://www.vetteprojects.com/bmv

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Re: Timing Advance (5/5)
4/21/14 9:27pm

KDADDY79
Former Member
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Dutchess County, NY - USA

Vette(s):
White '79 Corvette. It's a driver.

Joined: 8/27/2007
Posts: 2484

Thank you for weighing in on this!

I use 89 Octane fuel after discovering it made no real difference from the Super Unleaded 92 or 93 Octane.

I'm thinking of advancing it 2 or 3 degrees and see how it goes.

Kevin

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