New lifter question?
Thread Starter
Racer
Joined: Oct 2007
Posts: 284
Likes: 6
From: Palm PA
New lifter question?
I just put new heads on my car. I checked the lifters and some were worn so I replaced all of them. When I stab the throttle it sounds like I'm getting a backfire in the carb. The car runs rough at higher RPM. The exhaust also sounds louder and my chrome headers are turning very blue. I was told to set the lifters one turn down on the cam base. Could these new lifters be pumping up at higher RPM and keeping the valves from seating, causing combustion gasses to backfire into the carb. I only have about 20 miles driven at this time. Do I have to put on more miles to break the new lifters in?
Thanks for any answers.
68 Vetteman
Thanks for any answers.
68 Vetteman
Thread Starter
Racer
Joined: Oct 2007
Posts: 284
Likes: 6
From: Palm PA
This aint good!!
I just put new heads on my car. I checked the lifters and some were worn so I replaced all of them. When I stab the throttle it sounds like I'm getting a backfire in the carb. The car runs rough at higher RPM. The exhaust also sounds louder and my chrome headers are turning very blue. I was told to set the lifters one turn down on the cam base. Could these new lifters be pumping up at higher RPM and keeping the valves from seating, causing combustion gasses to backfire into the carb. I only have about 20 miles driven at this time. Do I have to put on more miles to break the new lifters in?
Thanks for any answers.
68 Vetteman
Thanks for any answers.
68 Vetteman
Sucks68 Vetteman
Race Director
Joined: Jan 2000
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From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Sad to hear it....but hey.....makes for an SOI.
Significant Opportunity for Improvement!!
JIM
Significant Opportunity for Improvement!!
JIM
been there you have to clean it out.
Thread Starter
Racer
Joined: Oct 2007
Posts: 284
Likes: 6
From: Palm PA
Thanks for your info. I'm getting a cam & lifter set. A rebuild is planned in the future, just not now. I'm hoping to do a lot of driving this year as long as the bearings hold up. 
68 Vetteman
68 Vetteman
