Need help with advance curve for a 3.2
 

Hi
I recently bought a ROW 3.2 -85 long block. Until I get the funds for carbs or an ITB efi I will use a CIS system on it.
I've read that I can use a pre SC distributor instead of the original 3.2, and I might have one from a 71, but that I need a new advance curve on it.
The engine is stock otherwise with a 10.3:1 compression ratio and will run on equivalent 94-95 US octane gas.

I'm hoping someone here could suggest an appropriate advance curve?

Magnus,

The distributor will have to be a 2.4 or later unit due to a larger bore in the case for the '72 models and forward.

The choice of a stock advance curve seems to be problematic, considering the 10.3:1 compression ratio ... maybe a 1969 911S derated, or retarded 3° - 5° could work?

OK, a 2.4 or a 2.7 distributor then. I didn't know they changed the bore in the case, thanks.

It doesn't need to be a stock curve, just one that will work, I can get it recurved locally but the guy needs to know what curve to use.
I was looking at what curve the motronic uses at full load (http://www.911chips.com/ignition.htm) and thinking that maybe around 25 degrees of maximum advance would work and give me some margin.

bump, anyone else?

here's a look at a stock map, don't know if this helps or nothttp://forums.pelicanparts.com/uploa...1193094595.jpg