Overfuelling

Archives of Posts to the NZ MX5 List back in 2002
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lou Girardin

Overfuelling

Post by lou Girardin » Fri Jul 12, 2002 9:20 am

Hi Matt,
You need to ensure that you have 75psi fuel pressure at 6 psi boost/7000 rpm.
Pressure must increase 6psi per pound of boost over that. Fuel pressure at
idle with the AFPR vacuum detached is 48 - 52 psi. These are Sebring specs
Is the tech bridging the grn and ten terminals in the diagnostic connector?
You can try 10 degrees advance, I found that I got detonation at that and 6 -
8 was better. Mind you that was on 96 gas not 98. Water injection is the cheap
answer to detonation. I'm running 14 degrees at 7.5 psi boost, NO knock!
Lou

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