Getting some valve clatter under heavy acceleration
Thread Starter
Instructor
Joined: Dec 2003
Posts: 129
Likes: 0
From: Rio Medina Texas
Getting some valve clatter under heavy acceleration
I've got the car timed correctly and it was running pretty well. I'm running mild cam with vortec heads, performer intake and stock qjet (rebuilt). This evening I went for a cruise. Only about the fourth long cruise. It runs out fine but from standing start under heavy acceleration it pings a little then goes away. Any ideas?
Thanks, Mark
Thanks, Mark
Thread Starter
Instructor
Joined: Dec 2003
Posts: 129
Likes: 0
From: Rio Medina Texas
That sounds like a good idea. I am using the lightest spring in the kit. I was supposing the problem was elsewhere because I hadn't noticed before but that may be because I just haven't pushed it like I did this time. 
Le Mans Master
Joined: Mar 2004
Posts: 7,493
Likes: 1,501
From: Little Rock AR
Yes that sounds even more likely now. You might notice the idle getting smoother too once you swap in the medium spring. Try one medium spring and one soft and see if it goes away. If it gets only a little better but still there try two medium springs. That should be about right but in some cases you may need to go stiffer.
-Mark.
-Mark.
Thread Starter
Instructor
Joined: Dec 2003
Posts: 129
Likes: 0
From: Rio Medina Texas
Originally Posted by stingr69
Yes that sounds even more likely now. You might notice the idle getting smoother too once you swap in the medium spring. Try one medium spring and one soft and see if it goes away. If it gets only a little better but still there try two medium springs. That should be about right but in some cases you may need to go stiffer.
-Mark.
-Mark.
Mark, Thanks for the help. I installed one stiffer spring from the curve kit and left one of the light ones.
Car launches well now.
