Jet sizes please for a 1641

[montypsx]

I'm on a roll today sorting all my little jobs out. Could somebody please tell me the jet sizes on a 1641cc with twin empi epc34 carbs (weber ict34) with a 009 dizzy rest of the engine is standard cheers phil

 

[Trikky2]

The extra 43 or so cc won't make much odds.

For example, roughly speaking, a 1641 running at 3200 rpm will pull as much mixture through the carb as a stock engine running at 3100 rpm. Not enough difference to matter IMO.

 

[six]

varies but these should get you very close without rolling road time

f3(leanest so may need 55 idles) or f6 e tubes
air correction jet- 160
main jet-130 - 135
idle jet-52
needle valve assembly-175

 

[Zcat7]

On my 1641 I ran Kadron 40's with 55 idles, 130 mains and 28 venturis. When I ran this config on a 1776 it was too lean, causing hesitation on acceleration etc. I had to up to 60 idles and 140 mains. Not an exact comparison I know but I thought it might help.

 

[montypsx]

Thanks guys. I was just cleaning them out as I have a bit of a stutter and thought it have been a bit of **** so I thought I would just check the jet sizes whislt I was at it out of interst. Cheers Phil