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bykr · 10-04-2020, 08:56 PM

I had a similar issue with my ProStar 500 pushing thru Holley regs. Magnafuel sells a spring to reduce pressure along with opening up the return orifice to 3/8" helps. Using a Magnafuel reg. for the carb also helped as it would still push thru a little on the Holley regs.

10-04-2020, 08:56 PM	#10
bykr Member Join Date: Jan 2014 Location: SoCal Posts: 232 Likes: 274 Liked 167 Times in 81 Posts	Re: fuel pressure question I had a similar issue with my ProStar 500 pushing thru Holley regs. Magnafuel sells a spring to reduce pressure along with opening up the return orifice to 3/8" helps. Using a Magnafuel reg. for the carb also helped as it would still push thru a little on the Holley regs. __________________ Tim Schmackpfeffer 762 SS