Outlaw720 Posted August 22, 2012 Report Share Posted August 22, 2012 im just wanting to see whats a good jetting combo for my 1980 4x4 L20b cause im just getting way to much air and id doesnt like to throttle up unless you pump it a few time to keep it goin. so any help on jet size or whatever would be cool. Quote Link to comment
Stupid_fast Posted August 22, 2012 Report Share Posted August 22, 2012 stock pump jet is a shit 50 single-sided one, get a new 55 pump jet, or maybe a 50 is better for stock l20b? What are main jet sizes? What are air jet sizes? What are idle jet sizes? How many turns is the idle mixture out? http://www.racetep.com/webjettune.html Stock L20b should be like...140/145 main, 170/160 air, 60/50 idles. (primary/secondary) I've been getting help from a pro tuning my L20b with 32/36 with a 475 lift cam and its nearly dialed in ... I think I may be able to provide some insight. Stock jetting is easy. 2 Quote Link to comment
banzai510(hainz) Posted August 23, 2012 Report Share Posted August 23, 2012 the accell pump working.????????YOu see gas being squirted in when you cycle the linkage? Motor timmed? Quote Link to comment
wat Posted August 23, 2012 Report Share Posted August 23, 2012 Hey not to hijack this thread but also can there be light be shined on good jet settings on an l18? My motor is a bit tired at 160psi comp. I'm running the starter jets with a weber kit from the previous owner. 135/140 f6/f50 etc etc. I'm one turn out on the idle screw but still get all blackened plugs. Quote Link to comment
banzai510(hainz) Posted August 23, 2012 Report Share Posted August 23, 2012 135/140 f6/f50 etc etc. I would call that good. Quote Link to comment
Stupid_fast Posted August 23, 2012 Report Share Posted August 23, 2012 I'm one turn out on the idle screw but still get all blackened plugs. Check primary idle jet size. Check Secondary idle jet size. Should be 10 less than primary. Replace with smaller idle jets, should be like 55/45 for l18. Should run fantastic in the high end, crap in the low end if 1 turn out and rich. Might need 140/145 primary jets. See how it runs after fixing the idle circuit. Hainz you would probably feint if I told you the jet setting on my cammed L20b. 1 Quote Link to comment
Outlaw720 Posted August 24, 2012 Author Report Share Posted August 24, 2012 i guess i forgot to put what set up i have ive got the Offenhauser intake with a 32 36 Weber and im not sure what size jets ive got but ill find out tomorrow. Quote Link to comment
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