10 degrees btc would be before the leading mark. Efectively makeing it 10 degrees advanced correct!!!! This is on a turbo 12a project and habe been told 10L 20T and even 10L 10T to make them fire at the same time. Now lets say i go with 10L 20T i would need to measure ten degrees clockwise fom 0tdc for the 10L and then 10 degrees counter from 0 for the 20T makeing it a twenty split correct?



SO anything btc means you mark clockwise after 0 and atdc means counter closkwise on the pulley correct!!!!

http://www.yawpower.com/pultime.html

actually jeff20b's method is easier, 1mm = 1 degree....

i read that the other day. so clockiwse from 0 is btdc meaning advanced and counter is atdc from 0 right!!!!!

i cantseem to adjust the trailing at all when i move the pod in and out there is no noticeable diffrence. i locked the dizzy buy pulling springs. With the cap of when i move the pod in and out the plate inside moves. so its hooked up. i have it set dead in the middle of the adjustment for now. How can i get the trailing to fire at the same time as leading. This is a turbo blowthrough app

Sounds like the pod is leaking. you may have to do it by hand which sucks royally. you will need to open the dizzy up move the trailing and lock it in place, then put it all back together and try again until you have the timing right. Thats the way it was explained to me anyways

There is nothing to leak there is no vacum going to it it is locked mechanicly