Crank Trigger

[SStockDart]

Originally Posted by SuperStock 1890

Maybe I can talk about my experience with switching from a billet MSD optispark to a crank trigger while on the dyno. This may not be exactly what you are looking for but since you guys are throwing daggers back and forth maybe something about the topic would be helpful.

I was chasing a top end miss and changed all kinds of crap and it was still there. I had a new crank trigger in the box so I decided to see if it would help clear up the miss. I never even unstrapped the car from the dyno. Got everthing together and set the timing where it was in about an hour and was ready for a pull. There were no other changes. Guess what. I still had the miss. Still scratching my head I pulled up the data. From 4500 to 7400 I picked up 10-14 hp on a stocker except at the points of the miss. I rechecked the timing to make sure I did not find out something by accident. Still where it was with the optispark. Still had the miss but got a little more power. Cooled it down and did it over and same result.

Valve spring causing the miss?