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Old 08-07-2005, 10:14 PM
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To advance or not to advance?

I have a small block chevy (327 .030 over. I have been getting various advice on where I should set my advance. It is strictly a drag engine. It is set at 44 total advance now but I heard that 36 or 38 would be better. Any ideas?

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Old 08-07-2005, 10:24 PM
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depends on what the car-engines wants..but i would yes that 44 is too much...38-40 is good on most motors...we run 40-42 on our motors but thay are achoul motors and are 14-1 compression..motors...
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Old 08-07-2005, 10:55 PM
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Quote:
Originally Posted by 66pontiac
I have a small block chevy (327 .030 over. I have been getting various advice on where I should set my advance. It is strictly a drag engine. It is set at 44 total advance now but I heard that 36 or 38 would be better. Any ideas?
run it now ,see what your e.t. is ,than run it at 36-38 and see your e.t. and keep adjusting til u get lowest possible time................
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Old 08-08-2005, 07:02 AM
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to advance or not to advance

I ran it at 40 advanced and it turned 12.8, then took it up to 44 and lost 4 tenths. People are telling me small blocks like a lot of advance, but I still think it should be in the 36 to 38 range.
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Old 08-08-2005, 07:56 AM
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if you lost e.t at 44 than its to much
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Old 08-08-2005, 08:55 AM
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timing

Every combo will like something different.... If you went back to 38 deg and the car ran faster then you are going the right direction.... Keep a close eye on your plugs for signs of detonation while you are trying different timing settings????

What heads??, distributor??,, Is it locked????

Keith
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Old 08-08-2005, 09:32 AM
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Quote:
Originally Posted by 347mustang
depends on what the car-engines wants..but i would yes that 44 is too much...38-40 is good on most motors...we run 40-42 on our motors but thay are achoul motors and are 14-1 compression..motors...

If your getting away with that much timing and not burnin down engines. You must be super rich. You'll go quicker with a leaner mixture and less timing. OR you heads are really poor designed.
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Old 08-08-2005, 09:48 AM
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Ignition Timing.

Timing is a factor of your compression ratio, cam profile, and combustion chamber design. There is not a "right" or "Wrong" when it comes to timing. I've got one small block block that runs best at 54 degrees, I have another engine that runs at 26. Give it what makes it happy, but as stated earlier, if you can change the timing that much, and not hurt the engine you're pretty rich, and need to take care of that first. You can tell a lot about timing by reading the heat on the spark plugs.
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Old 08-08-2005, 03:12 PM
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SBC's like a lot of initial timing with a big cam (20 degrees). And most sbc run best with about 40 degrees of total timing with older style heads and about 36 with fast burn type combustion chambers. So I think you should start with 20 degrees initial and 36 to 40 degrees depending on head design. Then fine tune the timing at the track.
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Old 08-14-2005, 08:18 PM
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timing

Quote:
Originally Posted by 66pontiac
I have a small block chevy (327 .030 over. I have been getting various advice on where I should set my advance. It is strictly a drag engine. It is set at 44 total advance now but I heard that 36 or 38 would be better. Any ideas?
Geez, start at 36 total at 3000 rpm and experiment. Drag times are not the end-all. Most drivers are not consistent enough. With no more info this is sort of asking...... how much gas mileage will I get?
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Old 08-14-2005, 09:51 PM
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Most drivers aren't consisten eonugh?!?

I can knock off 15.268 to 15.277 all day long. That's shifting manually too.

Anyway, I have currently about 24-26 total on my 383. It wants more, but I am trying to keep a sane initial and 12-14. I had it pushed up once through emissions, (a friend was doing it and advanced it bit and it passed) I did not have track data, but it seemed to run good. I can only say, give it as much as it wants without detonation. Man I need to take care of the low advance I've got...
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