Originally Posted by Grinder

Stock TZ.18 timing is as follows:

Crankshaft open 38 degrees abdc
Crankshaft close 60 degrees atdc
Crankshaft total open 202 degrees

Transfers, and boost are open for 120 degrees. Open 115 atdc.
Exhaust open for 168 degrees. Open at 95 atdc.

I don't want to disclose my exact crank numbers for my modified TZ.18, but you should start by removing .75mm from opening, and closing.

You should also enlarge the bore of the crankshaft, and add a tungsten weight to the crank.

How I balance is something I will keep to myself. Sometimes crankshafts need weight removed from certain areas. Sometimes I need to add tungsten weights to certain areas. A lot of the time, I do both.