Running rich at atmosphere
#1
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Running rich at atmosphere
Ok so I have a begi fuel pressure reg that boost fuel pressure as boost increases and that part is fine.
I have bipes for timing doing fine..
Where I am not doing fine is at no boost no vac and say 5 vac. it is riching up to 10.5 or richer. So i adjusted the BEGi fuel onset so there is no additional fuel pressure added by it at no boost/atmosphere.
So I rev the engine with the begi disconected and still the fuel pressure jumps to 48-50. So I remove the vac hose from stock fuel pressure and pressure jumps to 48-50. How do I prevent this. it is the only place this thing is not tuned at. Its fine at full boost, at light throttle at mid boost
BUT at slight vac to .5 psi I am RICH.
Is the stock fuel pressure reg supposed to do that. Can I stop it. It needs vac to keep pressure at normal 40?
Thanks in advance
I have bipes for timing doing fine..
Where I am not doing fine is at no boost no vac and say 5 vac. it is riching up to 10.5 or richer. So i adjusted the BEGi fuel onset so there is no additional fuel pressure added by it at no boost/atmosphere.
So I rev the engine with the begi disconected and still the fuel pressure jumps to 48-50. So I remove the vac hose from stock fuel pressure and pressure jumps to 48-50. How do I prevent this. it is the only place this thing is not tuned at. Its fine at full boost, at light throttle at mid boost
BUT at slight vac to .5 psi I am RICH.
Is the stock fuel pressure reg supposed to do that. Can I stop it. It needs vac to keep pressure at normal 40?
Thanks in advance
#6
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thanks I have it at 40 at atmosphere on the begi fmu same as stock with vac.
So there should be no additional pressure till it see's boost. Turns out the stock reg was adding a little at atmosphere up to 45. I put a one way valve in and it helped a little. I am trying to adjust my o2 clamp to get it a little leaner at atmosphere.
thanks
So there should be no additional pressure till it see's boost. Turns out the stock reg was adding a little at atmosphere up to 45. I put a one way valve in and it helped a little. I am trying to adjust my o2 clamp to get it a little leaner at atmosphere.
thanks
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