[Limey tri Chevy]

I have all the mechanicals done but the MSD literature re actually setting up the crank trigger with the 7531 for initial fire up is not that great. Can anyone take me through what has to be where for the engine's first fire up.
Thanks

 

[pat565]

If you do a search on crank triggers, there is some info I put into a thread last week on how to do a setup.

 

[Limey tri Chevy]

Thanks
I had a look but couldn't find your relavent posts. What I am after is how do i set up the inital 32/34 degrees that I want. I have the motor on TDC. The air gap is fine. The pick up is directly lined up with the magnet on the wheel. Maybe I have mislaid some of the instructions but after that I have no more info.

Do I get the inital advance from the 7531 or is it moving the position of the pick up. I have the retard per # of boost and rev limits sorted it's just this one issue I can't get my head round.

 

[pat565]

The distributor needs to be locked out. The engine needs to be turned until the 32 degrees that you want, is lined up to the timing pointer. When that is set, then move the mag pickup to line up with the wheel magnet. The main problem you're going to run into is the rotor phasing. It needs to line up at full timing, but be close to still work when your timing gets pulled out. If you don't pull a lot out, you should be able to find a happy medium.

Rotor phasing-
When the mag pickup lines up with the mag on the wheel, the cap and rotor need to be lined up to the cylinder that is firing. If you do this with the crank at 32 degress (reading at the timing pointer) the engine should be firing #1 or the cylinder that is half way through your firing order.

Hope this is what you were looking for.

 

[68Bird]

The 7531 will not ADD timing....ever.....it will only PULL timing. Set your base (max) timing with the trigger on the balancer. Put the pointer on 32 and line up the magnet with the sensor and you should be -close- for starters. Then dial it in using a timing light. The Digital 7 boxes are usually 5-8* slow thats why its important to time it with the light.

Craig

 

[Limey tri Chevy]

Pat, Craig
Thanks to both of you, thats exactly what I needed. I'll play with positioning the crank wheel so I get the best position for it. I have already locked out the distributor so hopefully I'll be good to go.
Thanks again.