yet another crank trigger question

[mbrooks]

i did a search and read all the posts and just want to verify...

when using a cank trigger, the dist. is locked out so no advance, so the timing is set at max advance and started and ran from there?

why couldn't the dist. be used with the weights and springs for advance?

thanks

[dragv6]

The dissy is only the pointer to which cylinder.
The crank trigger determins when to fire.
Advance weigts are pointless with crank trigger ignition.

[mbrooks]

thanks, that is pretty much what i thought. i'm taking efi off and retaining the crank trigger.

[David Redszus]

why couldn't the dist. be used with the weights and springs for advance?

It certainly can be and might even be much better than crankfire.

If an engine were required to operate over a wide range of speeds and loads, a variable ignition advance is best. Even point based systems have been successfully used when properly designed. But racers got away from distributor based advance curves because they could not figure out how to change the ignition curves properly.

If the engine is to operate only at full load over a limited speed range, a crankfire (or any other type of trigger) could be used.

Some systems will use a sensor for crank position only and use the EFI to define the actual ignition advance curve based on operating conditions.

[jeffmckc]

I have used a HEI to tigger a Msd a lot of times for this reason.

If not using it and using a crank trigger be sure to phase the dist. on number one when done

[mbrooks]

roger, i'm giving the efi one more chance with a rewire to take out some rfi and will see how it goes.