i finally got my engine back in my 70 dart , new holley 750 vacuum secondary carb , 408 stroker with edelbrock rpm heads and rpm airgap intake, mopar performance cam, carb seems to be very lean at idle, any suggestions on settings for this carb, idle mixture screw settings? main jet sizes? power valve? or acc pump cam?
holley 750 on a 408 stroker
- Thread starter ldtc
- Start date
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Snake
Mopar Nut
70 front jets,power valve depends what ya vacuum is at in drive idling ,mixtures screws are best adjusted with vacuum Gage adjust to get highest reading.Is your floats spot on.I myself love the holley,I am waiting for one to come to me from a member here.Its a 750 going on my 360 20 over 202 J heads ld 340 intake has 600 holley now mopar cam 284-474.My 750 build will be 70 front jets,I have 68 in the 600 now a little lean,5.5 power valve #31 discharge nozzles, red pump cam,white spring for my secondary.going to work good.
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