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Tuning question, it's pinging

1039 Views 10 Replies 7 Participants Last post by  Hottarod, 
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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.

Regards,
BillGear

1966 Mustang Coupe, 302 custom roller cam, holley 650dp,http://www.289mustang.com
http://www.289mustang.com/images/vmfcar.jpg
<P ID="edit"><FONT SIZE=-1>Edited by Billgear on 03/28/01 10:39 PM (server time).</FONT></P>
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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,http://www.289mustang.com
http://www.289mustang.com/images/vmfcar.jpg
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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,http://www.289mustang.com
http://www.289mustang.com/images/vmfcar.jpg
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