Here is the problem I have been encountering
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Team Owner
Joined: Apr 2002
Posts: 62,198
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From: All humans are vermin in the eyes of Guru VA
Cruise-In IV Veteran
Cruise-In V Veteran
Here is the problem I have been encountering
When my vette was still on the road, I had this problem.
Underload at part throttle it would lug and then backfire if you tried to accelerate. Low RPMs suck, no throttle response, and again at part throttle you cant accelerate under load, without luging and backfiring.
I rebuilt the carb, adjusted the floats, adjusted the idle screws.
I think that the combination of the long duration cam, and single plane doesnt jive with the low performance cylinderheads.
Underload at part throttle it would lug and then backfire if you tried to accelerate. Low RPMs suck, no throttle response, and again at part throttle you cant accelerate under load, without luging and backfiring.
I rebuilt the carb, adjusted the floats, adjusted the idle screws.
I think that the combination of the long duration cam, and single plane doesnt jive with the low performance cylinderheads.
Safety Car
Joined: Jul 2002
Posts: 4,269
Likes: 3
From: St. Charles IL
Cruise-In 5-6-7-8-9-11-12 Veteran
A CI-6 Car Show Winner
Re: Here is the problem I have been encountering (Guru_4_hire)
Might be too much carb. You mentioned adjusting the floats, so it must be a Holley? If not, here is Lar's paper on tuning a Quadrajet:
http://www.corvettefaq.com/redir.asp?site=215
Here is another Lars paper on tuning a Holley, pay special attention to tech tip #3:
http://www.corvettefaq.com/redir.asp?site=25
There is more info in the corvette FAQ site, hope this might help.
[Modified by Big Fish, 9:12 PM 5/8/2004]
http://www.corvettefaq.com/redir.asp?site=215
Here is another Lars paper on tuning a Holley, pay special attention to tech tip #3:
http://www.corvettefaq.com/redir.asp?site=25
There is more info in the corvette FAQ site, hope this might help.
[Modified by Big Fish, 9:12 PM 5/8/2004]
