thanks maybe that's the issue

You shouldnt have any start retard with that curve. You can enable start retard with a custom timing map.

What kind of cranking psi do you have when doing a compression test ?

Exactly what I was going to get to depending on his answer. Good to see I was thinking along the lines of others.

To the OP: The rotor is phased different from how the OEM rotor comes new. You can either do the modification yourself (Daytona has instructions for this) or you can simply by a modified rotor from them.

​​​​​​​Did you buy one from them already modded ? Did you do it yourself ? Or did you not know this ?

You know we're a Daytona Sensor Dealer and we use their products daily but we dyno every engine we build so it's a fool proof system you may want to give them a call about the proper set up those guys are super sharp and I'm sure they can point you in the right direction call Allen or one of the tech guys. You've got a great product and they'll be happy to help. Good luck Sincerely Laz Mesa

Icdedppl isnt running a mercury distributor.

the reason eddie mentioned rotor phasing, is because the boxes remove timing electronically. You can only pull so much timing, before crossfiring in the cap becomes an issue, because the rotor to terminal relationship grows . Especially with a small cap distributor.

Crossfiring while cranking the engine , can certainly cause starter kickback.

Every 4 pulses, equals 1 revolution of the engine. In custom timing mode, you can adjust this. I wanna say max is 12 pulses if i recall. That would be 3 complete revolutions of the emgine before spark ignites.

I think I just realized the retard feature was turned off on my boxes. I should be ok now. Too much timing at start up I believe was causing the kick back. They have great features with those ignition system s. Stupid me confused on all the dials that control that issue. Otherwise I would have to use kill switches to turn over then light it like the race car guys etc.... Friggin A. Thanks for all the help.

Btw I use an MSD zero advance mag p/u dist. So the rotor phase process does not apply

What do you have for initial advance as seen with your gun ?

great mine too .. changed msd distributer ,to a mercury . thought my starter came loose . checked that . I was like wtf .. mark from mer came had issues with computer , never really got the full benefits of the boxes .really bums me out .. now this great ... thanks for the tecknicle knowledge of this issue .. hate to wreck a ring gear ;; sure nasty sounding when she grinds lol

I think 20 degrees but the anti stall feature changes it.