The car is a del sol with a d15b7 turbo 8psi frontmount
Heres the deal....I blew a head gasket this past weekend. Replaced it, all my timing marks are lined up, cam gear is set at zero, stock cam, and i set the timing to 14 degrees. Im running 93 octaine, with 1/2 degree retard per pound of boost, at only 8psi and i heard what i believe was a little detonation in first, at about 5,000 rpm. So i let off real quick and i could see in my review that it puffed out a decent cloud of smoke. Not sure on the color, it was hard to tell. The weird thing is i was running the same timing (14degrees) previously with less boost retard and had no problems. What should i do....Im scared to get on it. Could it be bad plugs? Beats me because i ran with those setting forever with no problem. Maybe i need to reset ecu?

 

what are your spark plugs gapped at?

 

running a .030 gap

 

warped head/deck surface?

How bad was the headgasket?


Rob

 

Cheap head gasket and it is getting hot spots maybe?

 

retard the timing to a full degree per lbs of boost.

 

The gasket wasnt bad at all...I could even see where it was blown. I didnt let it get real hot so im sure its not warped. Once i saw it creeping up like a line or two i shut it off, so it didnt get real hot.

Would i need that much retard at 8psi?