67 twin turbo dart

Hemirunner said
I run Holley so I’m not familiar with issues that can crop up with MS nor can I diagnose that thing over the Internet from 1000s of miles away but they need to be logging and if the dyno shop can’t log, diagnose and tune, why are they in business? They need to check for any type of configuration issues like a rev limiter Or spark cut safety or coil dwell/ignition setup errors. That graph isn’t even reflective of engine only power so hard to say what’s going on. You got anybody building and tuning big power stuff in your area? They’ll likely know how to diagnose.

True, was just looking for in site. They have sent the tune to megasquirt to look it over and see if he missed anything. When I was there we did log and send some to be checked over to megasquirt as well. Not really they are pretty much the only dyno shop that does megasquirt, all others are the more popular ones like your Holley. I know he kept saying it felt like the brakes were on when driving, engine revs clean he had been tuning that just to clear up the issue of the crank signal drop out which is taken care of now. Rev limiter was set to 6900 where I set it. Unless they did change it here's where I had it. Coil nominal dwell 3.5ms, spark duration 1.0ms. Here's the last I had for settings.