Performance Distributor in Stock Engine
Lets go back to the graph I posted earlier. That is a graph of engine timing vs. rpm.
Below is a graph of distributor advance. In this case the Chrysler built MP distributor's mechanical advance.
Degrees are engine degrees, and engine rpm (crank).
If you look in the shop manual for '67, advance is given in distributor degrees and distributor rpm.
Now lets see what Ehenrberg describes.
He says the degrees are distributor degree. OK great. That cross checks with the original cam plate.
He doesn't say if the rpm is distributor or crank.
We can sketch in both and see if either is more likely knowing he has likely contracted to replicate the MP distributor with chrysler advance mechanism.
here's both
My guess now is the rpms are distributor. So double them to get the crank rpm. The dark reddish circles.
That would be OK for a stock engine. Might even be real good if its what it seems to be -the same as the old school P-part distributor.
IMO if it was the pink curve its advancing too quick for use with vacuum advance. Not ideal for street. That's one of the issues with Mallory built MP distributors. Since Rick was promoting these as the replica of the Chrysler built ones, it's almost certianly not got the super fast advance. I bet on an engine with a typical ECU, the actual timing advance will look like the gray line.
Thanks. He's made some changes since I last looked.
Lets go back to the graph I posted earlier. That is a graph of engine timing vs. rpm.
Below is a graph of distributor advance. In this case the Chrysler built MP distributor's mechanical advance.
Degrees are engine degrees, and engine rpm (crank).
If you look in the shop manual for '67, advance is given in distributor degrees and distributor rpm.
Now lets see what Ehenrberg describes.
He says the degrees are distributor degree. OK great. That cross checks with the original cam plate.
He doesn't say if the rpm is distributor or crank.
We can sketch in both and see if either is more likely knowing he has likely contracted to replicate the MP distributor with chrysler advance mechanism.
here's both
My guess now is the rpms are distributor. So double them to get the crank rpm. The dark reddish circles.
That would be OK for a stock engine. Might even be real good if its what it seems to be -the same as the old school P-part distributor.
IMO if it was the pink curve its advancing too quick for use with vacuum advance. Not ideal for street. That's one of the issues with Mallory built MP distributors. Since Rick was promoting these as the replica of the Chrysler built ones, it's almost certianly not got the super fast advance. I bet on an engine with a typical ECU, the actual timing advance will look like the gray line.