Topic: timing advancer mod

[Don R]

 Here's what I noticed when I was making sure the Gerex ignition had advance and it was working. It needed a clean and lube. It's an 836, high compression, RC315 cam, 4-1, smoothbore carbs. 323 advancer and a welded weight. I think the springs need tightening also.
 
  It was sticky, it would advance and then just hang there. Now it at least returns on its own. If I can cure the engine rattle I'll work on the advance.

[Tracksnblades1]

Alcohol ?

[Don R]

 No, but it was street/track driven up until 1987 so maybe he limited timing due to poor gas. It is possible it had the turbocharger on it at least for a bit. I got a 64mm burned RC piston and it's three brothers in the stash. It's a 71 motor so probably wasn't born with the 323 TEC advancer.
 I probably have one of every advancer made. There's an old advancer thread around here with some good info.

[Don R]

 I read everything I could find and got a lot of info about advancers and springs, not a lot about what total timing and curve rpm is desirable in a modified engine. It seems the older 300 hitachi advancers worked better for performance then the 323 TEC. I however don't have points to bounce so the advantages would be in total timing and all in rpm.

[Don R]

http://forums.sohc4.net/index.php/topic,113338.0.html

 Advancer information. Google turns up the best sohc4 threads.

[PeWe]

I can recommend to cut the springs 1/2 wound!
Idle will be more stable and advance will not kick in too early.
For stock and modified engines.

[Don R]

Agreed on the springs, the advance cam has been replaced by the Gerex rotor. The 323 advancer may be a part that was modified by Gerex. The PO does not remember modifying it, so I won't tempt fate by swapping it out without more information.