Alright guys here is the deal. I have 8000 miles into my ls/vtec and have never noticed that my timing was retarded all the way! When I set it to stock(the middle) with out the proper procedure of using a timing gun I start to detonate. So I set it back. Any suggestions cause I have never had to adjust timing before. Also are gsr turbo pistons compatiable with a B18B? I'm looking to get CP pistons but they only have them avail of the shelf in either 9.0:1 or 10.5:1....thats way too high. I was looking for 9.5:1 and the gsr's ring in at 9.8:1 for the CP's. Any help would be great.

 

using a quality timing gun is the way to go with adjusting the ignition timing.
also make sure that the inside "service connector" is jumped with a paper clip and the engine is idling around 700 rpm. 16 degrees BTDC is the stock setting, but you have to take into consideration a chipped ECU (with possible ignition timing advace), the C/R of the motor and the cam timing settings (if you're using adjustable cam gears not at 0/0).

if you're running 0/0 cam timing, moderate C/R (11-12:1), a stock ECU program and 91-94 octane, you might only need 1 or 2 degrees of ignition retard. but every setup varies a bit.

for calculating C/R's when using different pistons, go to c-speedracing.com.
there you can calculate the C/R change when swapping pistons from one motor to another and when using aftermarket domed/dished pistons etc. if you know the dome CC of the piston then you can figure things out.

 

That sounds pretty good. Thanks alot.

 

no problem at all.

hope things go well for you.