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Guest Message by DevFuse
 

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quickie distributor vacuum advance Q


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6 replies to this topic

#1 baccaruda

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Posted 28 October 2003 - 03:44 AM

I'm using my 86 GL10 vacuum advance disty in the 87 XT engine I'm putting in my car. Do I need to choose a specific source for the vacuum or will anyplace I can tap into be OK??
thanks

#2 baccaruda

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Posted 28 October 2003 - 11:03 AM

bump

#3 Guest_taprackready_*

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Posted 28 October 2003 - 11:40 AM

Maybe comparing apples and oranges. But, when I stripped out my manifold on my 82 brat and changed from Carter onebarrel to Hitachi Two barrel I didn't hook the vacuum advance to the ported vaccum on the carb. I used full manifold vacuum off of the manifold. I've had no problems and the brat pulls strong with good low end torque and no pinging.

Bill

#4 Qman

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Posted 28 October 2003 - 02:24 PM

Vacuum should increase with RPM's. That is what gives the proper advance to the distributor.

#5 Guest_taprackready_*

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Posted 28 October 2003 - 04:08 PM

Originally posted by Qman
Vacuum should increase with RPM's. That is what gives the proper advance to the distributor.



I'm not debating your comment but I've checked the driveability and power with ported and manifold vacuum and the brat runs better with manifold vacuum. Besides, at fairly low RPM's, vacuum drops off anyway and its all mechanical advance has kicked in. At about 2500 RPM's the advance is topped out.

Bill

#6 Guest_taprackready_*

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Posted 28 October 2003 - 04:18 PM

Check out this article. It will help you figure out what is best for your particular combo.

http://www.chevytalk...ng_Advance.html

Bill

#7 baccaruda

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Posted 29 October 2003 - 06:31 AM

thanks




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