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Tuning question, it's pinging

1039 Views 10 Replies 7 Participants Last post by  Hottarod
I have a modified 302 with AFR heads and performance cam. I'm running 12 degrees intitial with 32 total on
my timing. the car is about 9.8-1 compresion, and I run 92 octane gas. I intalled light springs in my distibutor to get my timing to come in quick (read that this was a good thing). My car will ping if a bog
it down like 2k in 5th gear and then floor it. It doesn't ping once the RPM's have gone over about 3K.
Do I need to install some heavier springs in my distributor advance to keep the timing from advancing so quick? I'm going to get it dyno tuned soon, I want to get it close to optimize my dyno time. Any idea's
would be appreciated. I'm not running any vacuum advance.


1966 Mustang Coupe, 302 custom roller cam, holley 650dp,
<P ID="edit"><FONT SIZE=-1>Edited by Billgear on 03/28/01 10:39 PM (server time).</FONT></P>
1 - 3 of 11 Posts
I'm not sure about the CR stock block, stock pistons, heads milled to 54cc. I don't think octane ia a issue? My plugs look
like they are new, they have about 1200 miles on them. I have a air/fuel meter, it indicates that i'm a little on the rich side. I
would rather be a little rich. The car is a 5 speed, it will do it
in any gear, it's harder to tell in 1st or 2nd (not there very long). I'm concerned with damaging the alum heads more then anything. I will try the firmer advance spring in the duraspark.

1966 Mustang Coupe, 302 custom roller cam, holley 650dp,
The temp has been staying right at 180, I have a fan shroud and new fan clutch. These did seem to help, the outside temp
hasn't gone over 80 though!

1966 Mustang Coupe, 302 custom roller cam, holley 650dp,
1 - 3 of 11 Posts
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