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Timing Advance

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Timing Advance

Posted: 4/19/14 8:00pmMessage 1 of 5
K
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Dutchess County, NY - USA
Joined: 8/27/2007
Posts: 2484
Vette(s): White '79 Corvette. It's a driver.
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

Posted: 4/20/14 10:15amMessage 2 of 5
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Grapevine, TX - USA
Joined: 8/26/2006
Posts: 1537
Vette(s): 1972 LT-1 convertible with factory air. 2017 Black Rose Grand Sport M7 convertible.
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

Posted: 4/20/14 9:59pmMessage 3 of 5
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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

Posted: 4/21/14 5:09pmMessage 4 of 5
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Hot Springs, AR - USA
Joined: 4/24/2004
Posts: 3236
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
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.
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Re: Timing Advance

Posted: 4/21/14 6:27pmMessage 5 of 5
K
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Dutchess County, NY - USA
Joined: 8/27/2007
Posts: 2484
Vette(s): White '79 Corvette. It's a driver.
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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