jets for a 500CFM holley carb

[Anonymous]

hey,
my car runs with everything but i have some trouble with flooding and because of the over load of gas my spark plugs craped out.
this is my set up:
duraspark 2 plugs gapped at .054
264 cam 110 degree
2bbl holley 500cfm put on with adapter
dual roller chain 1.6hr roller
dual flowmaster exhaust

can anyone tell me what i could jet the 500 so it wont over gas it
any recomendations?
need anymore info?
thanks,
Sean

 

[wsa111]

Sean, the jet size has no affect on fuel flooding.

You should be running 68 main jets with a 8.5 power valve & have the power valve restriction channel @ .055 to .052 for best power at a 12.7-13.0 full throttle air fuel ratio using a air fuel on a dyno or an innovate wideband A/F tester.

By the way the stock 4412 PVCR is about .061.

Lets get back to your fuel flooding problem.

First make sure you don't have excessive fuel pressure, over 8#.

Make sure the float level is right at the bottom of the float level plug.

Put a new needle & seat in the bowl, using vasoline as a lubricant for the o'ring on the needle & seat assembly to prevent cutting the sealing o'ring to the bowl.

To achieve the proper A/F ratio at full throttle you will need to insert a wire insert in both restrictions or get a professional to drill & tap to put in screw in restrictors drilled to the proper diameter .055-.052.

Doing this will get you on track for proper air fuel ratio's.

Remember being too rich is just causing you power loss & fuel ecomomy.

I'm not guessing, all the above was proved using an innovate wideband A/F tester.

More power to you. William

 

[Anonymous]

found out flooding wasnt the problem....
but still since the 500 is ment for a larger engine i should probably jet it down any sugestions for the best combo on a holley 500cfm 2bbl on a 200cid engine