Got some detonation!

[YGBSM]

Finally got my 496 inch RB and Keisler 4 speed auto installed.  I'll post pics of the install once I get all the bugs worked out.  Driving home from the shop that installed the transmission (about 30 miles in 80-85 degree weather), I got some audible detonation at part throttle under load.  Engine temp never exceed 180 or so.  I'm going to start with the easiest solution, putting fresh gas + octane boost in, but what should I do if that fails?  What are my next steps?  Thanks!

[lisiecki1]

check the timing.

[y3chargerrt]

Disconnect the vacuum advance if your running any.

[Cooter]

Try and not "lug" the motor...IN Top gear (OD) with like 3.23 Gear, is gonna be a TALL gear when down low....

[firefighter3931]

Too much timing or a lean condition at part throttle will induce detonation. The fuel curve needs to be dialed in .


Ron