Quote:
Originally Posted by Gaz64
With an MSD programmable such as a 6530, you would check rotor phasing by drilling a large hole in an old cap, and use an adjustable rotor.
I would assume your new distributor takes this mostly into account, since the manufacturer has set the minimum at 10BTDC.
Sounds like you are on the right track.
Looking forward to your screen shots.
Gary
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+1^ on what Gary is saying. If the rotor phasing is off and your advance table gets the rotor far enough away from the intended cap terminal, the spark can intermittently decide it is easier to jump to a different terminal. The moment that occurs the correct cylinder doesn't misfire is just doesn't fire at all. The effect is a nosing over of the engine torque curve that you feel as the phenomena you have reported experiencing.
You will use up one cap to correct the phasing but it is worth the price of a cap. The other thing you need is an adjustable rotor to allow correctly repositioning the tip of the rotor. I am not sure if their rotor is custom to their ignition system or if it is generic and possibly has an adjustable cousin available that you can buy. In a worst case scenario you can always modify your rotor to make it adjustable but it is much easier to just buy one if they are available.
It is worth a call to PI to see if they offer one or can point you to one. It is also possible they have built into their unit an adjustment to accomplish the same thing by another method. Definitely give them a call and listen to what they have to say.
BTW that is a waaaaay cool distributor. It gives ignition map control capabilities just like ECU controlled coil on plug systems — very nice! And I love the smart phone control system.
Ed