383 MSD ignition

[68MoparCharger]

Currently I have a 383-originally a 2bbl. I've upgraded to a 4bbl holley 770 with vaccum secondaries, edelbrock 84cc rpm heads, weiand dual plane action plus intake, and tti 1 3/4 primaries 3" collector headers. I just got in the mail my new ignition system consisting of MSD 7al-2 box, a msd ss blaster coil, and msd pro-billet distributor. My problem is determining my timing curves, there are 6 curves to choose from, because it uses advance springs. I'm not sure what to go with so if you know about the timing curves from msd, or about what I should be shooting for, any advice would be appreciated.  Thanks.

[dodge freak]

A great ignition you are going to love it but maybe you should have gotten the 8251 coil but the box is more improtant than the coil that can be change later on easy and cheap enough.
You should try to use the lightest springs that will not cause the motor to ping, start with a strong spring and set the total timing to 36-38 degrees, now all timing lights may not read right so keep that in mind, if its off it be way off. Then drive it and if theres no pinging start putting lighter springs in till you hear it ping like going up a hill in high gear and go back up to the last springs. It depends on your gearing and compression and how good of gas you are using. Make sure you have good spark plug wires, thats the only "problem" with the MSD 7 if the wires are weak the spark is so strong it will crossfire. It start your cold motor great everytime and everyday.

[Chryco Psycho]

i usually start with an agressive curve generally E chart with the shortest or second shortest amout of degrees so you have approx 20* curve with initial timing set at 16-18* & total timing at 36-38* , if it pings you will have to decrease the speed of the advance so it comes in slower with total timing at higher RPM

[deputycrawford]

I like to know the cam size. it tells me what the fuel delivery is and the need for the ignition curve. I would start with around 14 to 16 degrees timing at idle. The maximum mechanical advance should be around 36 to 38 degrees and be all there by 3000 RPMs. Start there and test drive the car. Adjust from there.

[68MoparCharger]

I'll try what ya'll said, thanks for the info.