Timing question...

[Moparlike]

Hey.
My new MSD Pro Billit 8546 distributor is arriving tomorrow.
I’m looking for opinions regarding initial/total timing settings.... springs, bushings, spacers.
My info:
69 RR 440-6
506 stroker motor
10.5 compression
Cam is .600 lift/256 duration
Manual transmission

Thanks!!!

 

[Frank Mopar]

Bushing for 18 or 20 advance. I forget which one comes with it. Both light springs and set initial at 14 to start

 

[dvw]

What heads?

 

[coloradodave]

What rear-end gears and what octane gas is available in your area?

 

[Moparlike]

What rear-end gears and what octane gas is available in your area?

The 9” rearend is 3.54; I usually run a 2/1 mixture of 91 and 112 race gas, avg 98 octane.
Thanks!

 

[Moparlike]

What heads?

Edelbrock Performer ported heads.
Thanks!

 

[dvw]

I'd be surprised if it needed more than 34 total. As much as it will take initial, some where around 20.
Doug

 

[coloradodave]

I'd be surprised if it needed more than 34 total. As much as it will take initial, some where around 20.
Doug

I agree. As long as you keep the octane level up, the lightest MSD springs and as much initial as it will take without hot start problems. Total 34-36 should be very close.