IF YOU HAVE A 93 OR LATER CYCL HEAD, YOU WILL HAVE PINGING UNLESS YOU SET THE TIMING AT AROUND 6 DEGREES

Jerry-

You know I love you and I respect you, but I do not agree with the above.

I am running a '95 head on top of a '91 bottom end with a .040" overbore. Stock early injectors and computer, larger MAF and TB, a Delta cam and a header. Timing set at 12*, no pinging unless I am pulling a steep grade, like really STEEEEEP grade at speed. There is only one hill that does that to me around here and I have not pulled it with high grade gas yet to see if it makes a difference.

BTW, for reference, the CR cc'd out to 9.3:1. Power is great. It pushes 35's with 5.38's like a dream. Avg MPG is about 22-24 (mostly hwy) with about 2200mi on the rebuild.

Michael

Durring my rebuild I discovered that the same ground strap had not been re-installed but we continued on and made note of it. When we attempted to start the truck upon completion the computer did what kevin described "went bananas". I simply went to Sanels, purchased a longer strap and found an alternate root to ground to. That solved that issue.

I also had a ping which was described to me as a timing knock. I did what JLemond suggested to you here and adjusted the timing. That problem too is solved.

Just had to put my $1.50 in cuz you are referring to the same ground strap that I dealt with and my symptoms were quite different than yours.

Hope you figure this out phil...good luck.

WILL AGREE WITH YOU COMPLETELY , THEY SHOULDN,T PING, BUT AT 12 DEGREES 90 DEGREE WEATHER AND REGULAR GAS IN THIS PART OF THE COUNTRY RATTLE RATTLE, MINE CHECKED OUT AT EXACTLY 9.0 ONE, HOWEVER I AM RUNNING A STOCK CAM WITH LESS OVERLAP THAN YOURS WHICH SHOULD MAKE MY CYL PRESS HIGHER , BUT AT THE SAME TIME YOU ARE RUNNING MORE LIFT TO CREAT MORE EFFECTIVE CYL PRESS, FINAL JUDGEMENT 8 DEGRESS, REG, GAS 20-22 MPG GIANT 225X15 TIRES AND A GOOD WORKING EGR SYSTEM BUT FUEL QUALITY HERE IS NOT THE BEST EITHER.