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Old 07-13-2003, 05:26 PM
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timing advance and engine temp

Can two degrees of advance on the timing increase the engine temp alot. I am running 14 degrees of advance on my sbc 350 and was wondering if I ran 12 or 11 if it would make the car runner noticably cooler????

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Old 07-13-2003, 07:48 PM
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I don`t think 2 degree`s would make any noticeable difference from 14 to 12 degrees, However, too low ignition timing can make it run hot, as can too lean a fuel mixture due to vacuum leaks or carb out of adjustment.
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Old 07-14-2003, 12:13 AM
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low timing

Double Vision why would to low of timing cause the motor to run hot?? I thought the more you advance the timing the hotter the engine will run........

I am running 11.3 compression with a 245@50 comp roller cam with a 640 lift. The car runs great, but a little hotter than my other sbc 350. I went from a 400 hp standard bore 350. To a 530hp, 30 over 350. The temp is around 12 degrees warmer with new motor ( 206 when driving. And gets to 218 when idleing. And I realize a new motor can run hot until it is broke in. ( I have 260 miles on new motor )

Is the objective to run as much advance as I can without detonation?? My altitude is 5500 and I can run 97 Octaine will no detonation. But I usually run race gas......

So from what you are saying maybe I need to bump the timing to 16 or more and the car might actually run cooler??? Let me know your thoughts......... Thanks
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Old 07-14-2003, 12:53 AM
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My thoughts? Friend of mine is running low 7`s with a 400 sbc with 6 inch rods and edelbrock heads, likely making close to what your making power wise, and his base timing is set at 18 degree`s BTDC, however, I don`t think that`s why your application runs hotter, you have to consider, horsepower equals heat, and to make more horsepower, you gotta make more heat, you`ll likely have to live with the higher tempature it runs for the horsepower output it makes. as for retarded iginition timing causing over heating is from Ignition timing deals with the time at which ignition occurs during the compression stroke. Retarded timing ignites the air/fuel mixture closer to maximum compression than advanced timing. Higher compression at the point of ignition means hotter temperatures form the burning of the air /fuel mixture and this translates into a hotter running engine. good luck.
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Old 07-14-2003, 09:49 AM
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If it dosn`t run any hotter than 212, with that many horses, drive it.

Good Luck,
TROY,
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Old 07-14-2003, 07:09 PM
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sounds good

Thanks for the info Double Vision. I also think my temp gauge may be a little inaccurate. I have had the temp up to 230 with no boil over?? But I do run a consistant 212 around town. And if I sit for awhile it will get to 220....... Thanks again.......
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