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433 Posts
If you've installed Cudney pistons, can you post your compression
with the Doo pistons when the sled was new and with the Cudney pistons new?
For example when my sled was new with doo pistons and rings compression was 137 ish. With the Cudney's using the same guage, its 150-152 using 5 good pulls on a cold motor.
I want to see if there is a trend that the Cudney's are giving you higher compression. Thus if they are, there may be more of a concern to run good gas with Cudney's or jet a little richer. I'm heading to Canada in two weeks and will
probably jet up from 380's to 390's to be safe anyways.
with the Doo pistons when the sled was new and with the Cudney pistons new?
For example when my sled was new with doo pistons and rings compression was 137 ish. With the Cudney's using the same guage, its 150-152 using 5 good pulls on a cold motor.
I want to see if there is a trend that the Cudney's are giving you higher compression. Thus if they are, there may be more of a concern to run good gas with Cudney's or jet a little richer. I'm heading to Canada in two weeks and will
probably jet up from 380's to 390's to be safe anyways.