sputters/pops when decelerating
Team Owner
Joined: Jul 1999
Posts: 26,545
Likes: 46
From: Huntersville NC
Originally Posted by Pete76Shark
LARS is always right on the money so listen to him.
HOWEVER, I have had lots of popping through the exhaust on decelleration that was caused by exhaust leaks!!!!! Broken front pipe, badly sealed bends in front of the mufflers, etc.......... check the entire exhaust, manifold to tips - for leaks!!
Safety Car
Joined: Jul 2002
Posts: 3,770
Likes: 3
From: St Louis MO
Originally Posted by ruby76
Lars, I took the air cleaner off and looked at what I thought the jets were, the brass looking part that sticks out into the "barrel" - sorryfor my terminology. Here is what I found - I drew it in paintbrush real quick as I don't have a digital camera:
The number on these parts are "45R - 107". Did I have it right, is this what the jet is? THen my next question is I don't see 72 on it anywhere but I could be looking at the wrong parts.
The number on these parts are "45R - 107". Did I have it right, is this what the jet is? THen my next question is I don't see 72 on it anywhere but I could be looking at the wrong parts.
Brett
Thread Starter
Drifting
Joined: Sep 2004
Posts: 1,532
Likes: 4
From: Fairview Heights Illinois, near Saint Louis MO, STL C3 Shark
Aha. I'll have to look for an "exploded" view of the carb - Im too much of a do-it-yourselfer to pack it up and ship it - probably will be my downfall. I've also got too much engineer in me and want to take things apart and touch all the parts so to speak!!
Thanks all for the advice, I'll try the mixture first when the rain quits. If Im not satisfied with the results then I'll re-post for more instruction. I think I have been pointed in the right direction.
Thanks again guys!
Thanks all for the advice, I'll try the mixture first when the rain quits. If Im not satisfied with the results then I'll re-post for more instruction. I think I have been pointed in the right direction.
Thanks again guys!
Pro
Joined: Mar 2005
Posts: 635
Likes: 118
From: Lakemont, GA
You may want to check where your vacuum advance is connected (and if it is functioning properly). If it is on the "ported" connection you are retarding your timing when you shut the throttle valve and this can lead to incomplete burn and extra fuel in the exhaust manifold. Connecting your vacuum advance to the manifold pressure will advance your timing and help with the full combustion in the cylinder.
Good Luck.
Good Luck.
Thread Starter
Drifting
Joined: Sep 2004
Posts: 1,532
Likes: 4
From: Fairview Heights Illinois, near Saint Louis MO, STL C3 Shark
On the Holley 80508 there is a port on the carb called the timed spark vacuum port. It is rather high on the carb so It is probably ported. I do plan on trying it on the full manifold vacuum port but just havn't gotten around to it. I tend to have more time at work - in front of the computer - an thus on this website, than I actually have to mess around with stuff..... 
but I am taking notes, so thanks for the advice!
but I am taking notes, so thanks for the advice!
080508s, 65, carb, deaccelerating, decceleration, decelerates, decelleration, install, kit, ls1, reduced, spark, speed, sputters, tight, turns, vette
