Ok, just rebuilt my motor and dropped it in. Trying to tune it but it's detonating under 10 lbs of boost. Checked timing with a timing gun and noticed the leading and trailing are firing at the same time. Any idea's of what could have happened? On the old motor we didn't have any isssues.


I do have a MSD6AL(really a SCI but same thing) with the MSD 2step with 2nd gen leading coils.



Thanks

 

What ecu are you using?

 

Power FC w/ datalogit

 

From what I know the timing is controlled by the ECU. I do not know how you would go about changing it any other way.

 

You can look at this thread...

https://www.rx7club.com/single-turbo-faq-122/how-many-run-no-split-timing-325400/

Maybe that can help?

 

The stock ignition fires both leading plugs at the same time. Not sure how your MSD is hooked up, but that may explain what you're seeing.