OK,

I have all the basic knowledge of how the turbo system works, and how to incorperate it with my early Z..

BUT!!!

One Part I just dont quite get......... "Timing".

stock 76' is 8 deg. (+/- 2 )..... 81'-82' turbo 20 deg... and 83' is 24 deg.

1) Why would you Advance the timing on a turbo system???

2) Can someone help me understand why with a system that you dont want detonation!!, would you have the spark start sooner??

3) Is there something about the increased cylinder pressures that slows combustion??? or do I have something wrong in my thinking this out??

Any help appreciated,

aZcarbum

the ecu retards the timing as the rev's increase, there is no vacume advance so it gets full advance at idle and only retards from there, a bud's high compression L28 wouldn't idle with less than 25 digrees advance

The '76 runs a mechanical dizzy.

The '81-82 run a CAS off the crank pulley.

The '83 runs a fully electronic optical dizzy.

They all use different ECU's and the latter 2 have ECU controlled timing.