502Ramjet fuel pressure
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502Ramjet fuel pressure
I was going to help a friend with his 502 project today, and spent hours trying to figure out why the bin I built for my Ramjet running a 7730 S_AUJP ran pig rich, BLM 96 INT 96.
Some time we forget the basics. What I found is that the early Ramjets ran a fuel pressure regulator from a Olds 4.0 that set rail pressure at 41lbs to 47lbs. The Ramjet MEFI4 502 uses the regulator from the 454J 96 to 2000, rail pressure 58lbs to 62lbs. Installed Olds reg and problem solved.
Some time we forget the basics. What I found is that the early Ramjets ran a fuel pressure regulator from a Olds 4.0 that set rail pressure at 41lbs to 47lbs. The Ramjet MEFI4 502 uses the regulator from the 454J 96 to 2000, rail pressure 58lbs to 62lbs. Installed Olds reg and problem solved.
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Car: 92 Form, 91 Z28, 89 GTA, 86 Z28
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Re: 502Ramjet fuel pressure
With EFI, you didn't really need to change the parts - just change the injector flowrate in the bin to match the real flowrate...
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Re: RamJet fuel pressure
With EFI, you didn't really need to change the parts - just change the injector flow rate in the bin to match the real flowrate...
When I figured out what GM had done, replacing the regulator was a quick and inexpensive fix compared to rebuilding the VE tables.
The other reason I posted this find was to inform the other RAmJet owners of the change of regulators. I found when you call any of the GM performance suppliers with the PN it will update to the latest part.
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