421cc trinity stage two ported 35 pwks jetting

[banshee421alky]

hi I just got done rebuilding my banshee I had it on alchol before the rebuild. Now I'm going back to gas I just bought some 35mm pwks dual carbs I have the following parts in my new motor, I just put some 70mm pistons with boost port, trinity stage 4 cool head with 18mm dome's,with an hotrod 4mm crankshaft,trinity has done an stage 2 port job,What jetting should I start off with and any idle what will be close to were I should end up at. and I'm going to put on any EGT sensor on it later what temps should the motor be running at wide open throttle and idle any ideals I will thank you in advance.

[locogato11283]

start with 162 mains and 48 pilot. needle in the middle. that should be safe starting jetting for you. depending on your elevation, temperature and pipes you might have to adjust a little bit.

[banshee421alky]

I'm runing T5 toomeys and the elevation is 450 ft .

[banshee421alky]

sorry i said i was running 35mm pwks I'm really runing 36mm pwks

[locogato11283]

i still think youll be fine with that jetting.

[2001Stroker]

uh, I know it's a little off the subject, but you don't have a 421cc motor. 68mm bore with a +4 stroke is 421. You said you have 70mm bore, which is a little bigger than 421.

 

I'm sure loco will get you pretty close on your jetting.

[banshee421alky]

ok my bad i have a 446.4cc motor with pwk 36mm carbs with an 4mm hotrod crank trinity stage2 port job with toomey TR6 exhaust trinity stage 4 intake and boost bottle trinity satge 4 cool head with 18cc domes and 70mm forged trinity pistons with boost ports cut in pistons and plus 4 degree key and kandn filter I think that's all and I double checked my wording