distributor ???'s

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Aug 29, 2005 | 10:27 AM

Powergod

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From: Illinois

distributor ???'s

I am building a pretty powerful pull truck motor and am wondering if I should get a new distributor. I have vacuum advance right now and am wondering if I would be better off going with a new one with mechanical advance. I do not know a whole lot about distributors. Thanks

Aug 29, 2005 | 02:29 PM

Bear 45/70

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From: Union, Washington

By pull to you mean sled pulls like tractor pulling or towing. For towing the vacuum unit will help gas mileage. For a pulling motor get a really good after market unit without vacuum advance. You are building a race motor in that case and vacuum advance is a gas mileage increasing system, which is irrelevant for that purpose.

Aug 29, 2005 | 05:21 PM

Powergod

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and maybe being a race type motor, it would have less vacuum and be bad for a vacuum advance type distributor. I am deffinately not worried about mileage.

Aug 29, 2005 | 06:58 PM

Bear 45/70

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Quote:

Originally Posted by Powergod

and maybe being a race type motor, it would have less vacuum and be bad for a vacuum advance type distributor. I am deffinately not worried about mileage.

Vacuum advance only works at light throttle settings, like cruise speeds. So on a race motor it is never be functioning because you never run a race motor there.

Aug 31, 2005 | 05:39 AM

austynn2001

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So for street, woods, some Chevy pulling, etc. I'd want a vacuum advance? Where would I get the vacuum from? Just unplug one of the holes on my Edelbrock Performer and put a vacuum tree thing there? Thanks, Austynn.

P.S. Sorry for hijacking your thread, but it looked like you learned what you wanted.

Aug 31, 2005 | 11:12 AM

Bear 45/70

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Never run manifold vacuum to the dist. advance module. There is a "ported vacuum" port on the carburator which gives you zero vacuum at idle (no advance) and as you open the trottle the vacuum is control by how far the throttles are open and how hard the engine is working. Manifold vacuum gives you full vacuum advance at idle (bad in itself) and when you crack the throttle the vacuum drops and then comes back in (also not good). The vacuum port on Holley carbs is on the right (passenger) side of the carb between the float bowl and the carb body. My memory fails me on the Edelbrock as whether it it the right or left hand port.

Aug 31, 2005 | 01:33 PM

monsterbaby

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From: iowa

for the pulling motor I would get an MSD unit, but whatever you do stay away from a mallory unilite the little light modulales don't like vibrations at all, and cost about $95 to replace, and for any type of offroad vehicle they are not a good option. I run an MSD on my race engine in my truck and have had the same dist for the last couple of years, and have never touched