Author Topic: Ida Jetting? (Read 2719 times)

neil68 · « **on:** December 01, 2006, 03:13:26 PM »

Looking for some ballpark jetting recommendations for 48 IDA Webers. Our race track is at 3,280 ft altitude and my motor is a 2017 cc (maybe 2175 cc) with CB 044 oval-port 42 x 37, FK8, 1.4's, 1 5/8\" header and 42 venturies came with the IDA's.

Bruce, Alan...?

Thanks,

Neil.

James Buchan · « **Reply #1 on:** December 01, 2006, 03:44:53 PM »

Quote

2017 cc (maybe 2175 cc)

Which is it

I would suggest going down to a 40 vent.

neil68 · « **Reply #2 on:** December 01, 2006, 04:56:06 PM »

Hi James,

I'm toying with putting in the slip-in 94's, but the motor is currently a 2017cc.

I was wondering whether the 42 mm vents might be too big, so I'll keep and eye out for some 40's as well.

Neil

Cameron · « **Reply #3 on:** December 01, 2006, 05:58:49 PM »

Hi Neil,

IDAs usually like a 60 idle jet, but you may be able to go smaller. 55? Higher altitude means lean it out. You can always take the spark plugs out, and have a look. What do your spark plugs say?

This would be a good reason to finally go out a buy that AFR meter. Xmas is coming! Start throwing out hints.

Bruce · « **Reply #4 on:** December 01, 2006, 07:39:17 PM »

I bet it will respond nicely to a 60 idle jet. Is it a 120 holder?

Do you have F7 tubes? I'd start with a 160 main on the 42 vent. Top it off with around a 180 air.

neil68 · « **Reply #5 on:** December 07, 2006, 08:28:30 PM »

Thanks for the replies. I haven't run the IDA's, so no spark plug readings yet. Currently collecting a few parts (jet screens, jets, maybe vents, etc) so I might as well order these parts together.

Thanks again