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now that i have the ignition tackled i figured carb is next, so i shoved the lm-1/lambda up my cars arse and sure as hell I'm pig rich due to me thinking that a 56 stock jet on the 570cfm street avenger is not gonna be enough for my kind of engine. so before i put the carb on i'll put a 62 size in. i shouldn't have ...
i'm rich in cruise, accelleration and WOT. at the 12-12.5 area. i want around 13.5-14, my guess is 56 back in or maybe 58.
anyone know how many jet sizes 1.5AFR is? so i don't have to do it 3 times?
Kalli
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1964 1/2
302ci, Edelbrock RPM heads and cam, 650 speed demon, Long Tube headers and Flowmaster 40s
Quick Performance Racing 9" rear, Moser axles, 3.5:1 trac-loc from FRPP and T5 transmission.
CSRP disc brakes front and FRPP discs back. http://www.gascc.ie
kalli do you know what the motor is pulling for vacumn? remember your power valve should be 2# lower than your vacumn reading or else the power valve will be partially open at idle causing a big rich condition. if your motor pulls 12" vacumn then a9.5pv will be good. if its pulling 9" then you need a 6.5pv etc this is EXTREMELY important!. changing main jets will not cure a rich condiiton at idle.
kalli do you know what the motor is pulling for vacumn? remember your power valve should be 2# lower than your vacumn reading or else the power valve will be partially open at idle causing a big rich condition. if your motor pulls 12" vacumn then a9.5pv will be good. if its pulling 9" then you need a 6.5pv etc this is EXTREMELY important!. changing main jets will not cure a rich condiiton at idle.
yah, the idle mixture i have adjusted again as it's only 2 screws. the engine is pulling about 15 in idle. the edelbrock rpm cam is known for that (can use them with brake booster etc). and the PV is about right being 8.5. i think about half the vacuum or a tad more is good. i don't want to have it open in cruise (never measured vac in cruise).
i'm quite sure that it is the primary jet, as i once had that same carb on without changing jets. i was just afraid to run lean, that's why i changed (to be safe).
i had
constant lean problems due to crappy fuel pump and accellerator pump cam. so i said i start a tad rich and go from there. didn't know it would go so bad :-).
i'll change them tomorrow night and re-measure
__________________
1964 1/2
302ci, Edelbrock RPM heads and cam, 650 speed demon, Long Tube headers and Flowmaster 40s
Quick Performance Racing 9" rear, Moser axles, 3.5:1 trac-loc from FRPP and T5 transmission.
CSRP disc brakes front and FRPP discs back. http://www.gascc.ie
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