dual weber 40dcoe jetting questions

[Rasp933]

Whats up ratsuns.

Dual 40dcoe 151 .spitting n coughing .at cruising speed.goes away under hard acceleration. Current idle jet size is 45 .main jet 115.fuel/air screw out 3 turns.n speed screw in 1/2 turn. Need sum info help.thanx

[Rasp933]

Eng size 2.2 litre

[EricJB]

What size venturies? Idle jet seems a bit small.

[Rasp933]

I think 30mm.should I go wit one half size bigger like 50 for idle jets?

[Rasp933]

No info lol

[EricJB]

Idle jets do more than just idle. That's what the air/fuel mixture screws are for. Idle jet are from idle to about 2200 to 2500 rpm, light to moderate throttle. The sputtering, and the air/ fuels being out so far tells me they need to be bigger. It cant hurt to try a bigger set. Then with it at idle, turn the air/ fuels in, one at a time, until the rpms start to drop. then out slowly till it comes back. They are like a faucet. In is lean, out is fat. you want the highest leanest idle setting. Good luck  

[Rasp933]

Kool thats wat I was told / thinking too.that idle jets seems to b small.i already bought to sets.50s n 55s.i hoping it fixes it .thanx

[Rasp933]

U think timing could b an issue. ? Its set at 10* btdc..

[Rasp933]

Hesitation at light throttle. Now dat I have installed 55s .what could this b?

[Rasp933]

Neva mind fellas got it going.it was .had to retorque the head cus compression was low on 1 n 2 cylinder s.causing misfire. Hesitation .crazy shit