vaccume secondaries vs. mechanical - Ford Truck Enthusiasts Forums

vaccume secondaries vs. mechanical

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Old 10-24-2007, 10:30 PM
6t56 6t56 is offline
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vaccume secondaries vs. mechanical

I put a edelbrock 600 cfm with mechanical secondaries on my 477.It came from the factory with a holley that had vaccume secondaries.Will the edelbrock dump in to much fuel because the secondaries are forced open?The engine is running really rich,blowing flames out the exhaust and running really bad.Is it better to have vaccume secondaries on this particular engine?
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Old 11-10-2007, 07:59 PM
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amish77 amish77 is offline
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Depends on application. If you are racing this thing only, then mechanical are the way to go. Street use usually goes with the vacuum secondaries. What is your timing/cam setup? Seems like it's gotta be more than just richness to blow flames out the exhaust.
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Old 11-19-2007, 08:26 PM
57Fitzjohn 57Fitzjohn is offline
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sorry thought you were talking 534. Disregard.

Last edited by 57Fitzjohn; 11-19-2007 at 08:30 PM. Reason: non relevant info for this post
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