Originally Posted by woodfamilyracing
the carbs are mounted sideways . seems rich at idle with 73 primary but lean while driving. plugs look ok but not rich. no idea on vaccuum, should i check it at idle or 2000 . boost varies when i wack the throttle it goes up but on cruise even at 3000 no boost has to hit 4000 to make it . atleast at the gauge . could be the hose. i am gonna check the blow off valve it may be leaking boost and sucking vaccuum.
the tooth count is 63 top and 52 bottom with an 8 mm drive .
i am gonna jet it 80 in front and 90 in rear tomorrow to see if that helps. again i think it is really lean.
what is the optimal egt temp it should run. thanks againofr all your help in advance, justin
The idle has nothing to do with the main jet. They are on separate circuits.
You have to tune each circuit individually.
Idle
Accelerator Pump
Primary jetting (cruise)
Secondary Pump
Secondary Jetting (W.O.T.)
Without taking your time and tuning each circuit, you'll chase your tail forever.
Moving the secondary jetting up will do nothing for you unless you plan on driving wide open everywhere.
EGT at wide open should be in the 1100F Degree realm, with mid 800s at part throttle.