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Shade Tree Mechanic
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14,316 Posts
Discussion Starter · #1 ·
I have the MSD-8598 Distributor which I purchased from Summit over a year ago, but haven't purchased my carb yet. This has a mechanical advance and the main reason I purchased it was that it has a steel gear and I have the B-303 racing cam which requires a steel gear. I could have purchased a dist with a vacuum advance and purchased the steel gear separately however I thought this would be better. Now I'm wondering about the issues of a mechanical Vs vacuum advance. From what I now know vacuum is much more "streetable" and gets better fuel economy as well as better throttle response. Mechanical is better for a pure race setup or where the RPMs don't vary as much like a generator or airplane. Also what do I do with the vacuum advance ports on the Edelbrock carburetor? Any help here will be greatly appreciated.
 

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Pro FFR Builder and Moderator
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14,784 Posts
I would much prefer and mechanical advance distributor. They are far more tunable and work just fine on the street.
 

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Shade Tree Mechanic
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14,316 Posts
Discussion Starter · #3 ·
Gordon,
Thanks.....your word is golden
I can just plug that vacuum advance port on the carb correct?
 
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