04-01-2007, 03:03 AM
|
 |
CC Member
|
|
|
Join Date: Jun 2003
Location: Palma de Mallorca, Spain,
ESP
Cobra Make, Engine: Contemporary with 482 KC/SO, TKO600,IRS Jag/AMP, 3.54 Salisbury PL,
Posts: 582
|
|
Not Ranked
Matt,
I got over the stumble by using a 100 air corrector on the idle jet. You are effectively richening the upper idle. Then you lean the low end by going to something like an F14/F16 emulsion tube (leaner low end).
What the 37mm choke/F5-F7 emus.tube/60 air corr./ setup is doing now is overly richening the transition over a broad band to go over the stumble.You are effectively pouring gasoline all over to get one spot right.
With the richer idle but leaner low end emulsion tube you are pinpointing the stumble more precisely with less gasoline and more air from the 40mm chokes.
The F14/F16 tube helped a lot to smooth out the progression and probably the third progression hole (although I am not sure on this because I drilled it before going to the 40mm choke, and it did not help much).
No stumble whatsoever now.
You may like your 37mm choke setup and you are probably running rich.
If you go leaner with the jets the engine you will lose the smoother progression and it will not run well. So you have a compromise there.
Go to larger chokes on your BB and you will experience the real Weber fever ! 
__________________
Nothing sounds better than a Cobra in a Tunnel !
|
Threaded Mode
