Corvette Forum : DigitalCorvettes.com Corvette Forums banner
1 - 2 of 2 Posts

·
Registered
Joined
·
606 Posts
Discussion Starter · #1 ·
77 Vette, L-48, stock except headers, Lars distributor upgrade, and intake. Timing is right and run mostly the 87 octane gas and never had a problem. I've changed to 93 octane and added STP Gas Treatment hoping to stop the spark knock. Didn't work!!

Any suggestions?????

Thanks in Advance!!
 

·
Registered
Joined
·
5,916 Posts
77 Vette, L-48, stock except headers, Lars distributor upgrade, and intake. Timing is right and run mostly the 87 octane gas and never had a problem. I've changed to 93 octane and added STP Gas Treatment hoping to stop the spark knock. Didn't work!!

Any suggestions?????

Thanks in Advance!!
Retard the spark 2*. See if you are running too lean.
 
1 - 2 of 2 Posts
Top