vac advance or not for FE Cobra

[r67cat]

I posted this a couple of years ago. Still relevant. Rick

Here is one of the best definitive articles on vacuum advance. I converted my 66 428FE from a non vacuum MSD back to a Ford dizzy with a Pertronix ignition and vacuum advance. Unless you are running your car at WOT, you should run vacuum as this article so perfectly explains. You will improve cooling at idle, drivability and plug fouling. Take your information from a power train engineer and not from a backyard hobbyist. Rick

http://www.hotrodders.com/forum/dist...1-a-59033.html

[davids2toys]

Originally Posted by r67cat

I posted this a couple of years ago. Still relevant. Rick

Here is one of the best definitive articles on vacuum advance. I converted my 66 428FE from a non vacuum MSD back to a Ford dizzy with a Pertronix ignition and vacuum advance. Unless you are running your car at WOT, you should run vacuum as this article so perfectly explains. You will improve cooling at idle, drivability and plug fouling. Take your information from a power train engineer and not from a backyard hobbyist. Rick

Distributor Tuning and Theory - Part 1 - Hot Rod Forum : Hotrodders Bulletin Board

Rick, this was an awesome thread! I have the MSD pro billet dist with no vacuum advance at all. I guess my thinking was same as the carb, Mechanical, no vac secondary's. Vac anything is for sissies with regular cars, not Hot-rods. I guess I may have to re-think this whole thing, especially since my car sees no track time at all, just aggressive street driving. Again, thanks for posting this very informative information.
Dave

[r67cat]

Dave, your welcome. Our cars are running the same power plant and I am sure your results like mine will confirm the science. That said, BB or Small block, short of a dedicated race car, vacuum advance should be the norm. Beautiful car by the way. Rick

[davids2toys]

Yes, you are probably right! How crazy is your cam and are you running an Aluminum flywheel? That might make some big differences for sure?
also, thanks for the compliment. Any pics of your car?
Dave

[fordracing65]

I thought the msd pro billet distributor had vacuum advance. Does it not.

[lippy]

Originally Posted by fordracing65

I thought the msd pro billet distributor had vacuum advance. Does it not.

Nope, it doesn't

[blykins]

Originally Posted by fordracing65

I thought the msd pro billet distributor had vacuum advance. Does it not.

They make one with a vac advance and one with a mechanical advance.

[fordracing65]

Originally Posted by blykins

They make one with a vac advance and one with a mechanical advance.

What is your preference on the engines you build for street strip.

[cycleguy55]

Originally Posted by blykins

They make one with a vac advance and one with a mechanical advance.

Pro-Billet w/o vacuum advance (requires MSD 6, 7 or 8-series ignition) : https://www.msdperformance.com/produ...ord/parts/8594
Ready-to-run w/ vacuum advance (no external ignition box required): https://www.msdperformance.com/produ...ord/parts/8595