Help! Engine knock
Thread Starter
Melting Slicks
Joined: Jun 2000
Posts: 2,923
Likes: 1
From: Las Vegas NV
Help! Engine knock
I rebuilt my 1988 with Trickflow heads and total seal rings, with everythings else stay stock. Now the engine knock at near WOT. I had check it with a scan tool and it showed the computer does retard the timing but the engine still knock. The highest Octane I can get around here is 91 Octane.
What do I need to do to correct this problem?
Thanks in Advance
What do I need to do to correct this problem?
Thanks in Advance
Melting Slicks
Joined: Jun 2001
Posts: 2,429
Likes: 14
From: CA
Re: Help! Engine knock (VQT88Vette)
MSD sells timing retard boxes that work with their MSD units - 6A, 7AL, etc. Their timing control boxes also have this feature.
You install a microswitch on the carb linkage, adjusted to close at WOT. NOS sells a good microswitch that would work well.
On the control box, you plug in modules for how much retard you need (from 1 deg to 12 deg)
Here is a link to their pdf download for their regular timing computer. It talks about hooking up a switch for "high RPM retard"
http://www.msdignition.com/pdf/8980_tc.pdf
