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Old 06-06-2010, 06:09 AM   #43
F1 Flathead
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Join Date: May 2010
Location: Brighton Michigan
Posts: 47
Default Re: Holly 94 jet recommendation for a flathead running open exhaust?

Here's an update on my issue. I bought a set of Holly #53 jets and put them in just in time to drive to the "Sins of Steel" car show yesterday. I noticed no or only slight improvement in performance with the bigger jets. Interestingly, the spark plugs look a little better now, though. They now have a more even "milk chocolate" color. Bottom line is that I still have an issue. I played with the timing on the way home, first advancing and then retarding it. Either direction made it run worse, not better. Next step will be to install new points since I also sprung a hole in my radiator and have to pull it anyway. I also want to try removing my "Helmet style" air cleaner to see what difference that makes. I read somewhere that some of those have very restrictive filter elements. That will be a simple thing to check out.
Dan
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