Webber Jet Sizing

[RA40-Rossco]

hey, im just chasing some advice on what size (approximately) jets i should be running in a basically stock 18R with a 32/36 DGV Webber, or what size jets you guys have found works for you.

compression was bumped up a tad when rebuilt and has extractors and a 2 1/4 exhaust

thanks guys!

[hosking1991]

There was a couple of threads on this a couple of years back now

heres one http://www.toymods.net/forums/showth...ight=18r+weber

i used these jets on mine and a was able to rev out to 6500rpm no problem

I'd switch to:
primary: 140
secondary: 150
... and you should see an immediate improvement.

Air correctors sound about right if they are:
primary: 165
secondary: 160

Get the mains right first, then you can increase/decrease the air correctors to fine-tune the top end. Smaller number air corrector = richer top end. Larger number = leaner top end. ie: the Opposite to Mains.

Cheers

Luke

[RA40-Rossco]

Ledgend, thank you!

i did a search and dident come up with that thread, all the other ones i found dident have sizing in them

+ Rep!

[Duk]

Ledgend, thank you!

i did a search and dident come up with that thread, all the other ones i found dident have sizing in them

+ Rep!

Probably because you spelt it wrong. It's an Italian carburetor, not a BBQ

[RA40-Rossco]

did a test with those jet sizings today, near perfect idles spot on 14.2afr, light throttle afr is very good, full throttle primary's only was around 14:1 through almost the whole rev range - pretty much what i wanted, and full throttle both barrells, 12.2 roughly with 1st depressed which gently falls back to around 12.8 at redline WOT, very happy over all