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Originally Posted by Dysan911
I can only assume the PD type superchargers would push you back hard down low and as you get higher and higher in the RPM begin to feel like it's letting up.
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The PD style slams you back and loses it's umph as you drive through your RPM's, it's not drastic, but you can tell it isn't pulling as hard as you get to the top end. Still a nice feeling, but nothing like I experience with the Centri and turbos.
Quote:
Originally Posted by Dysan911
Question: Would the PD Type blower be harder on the pistons/rings vs Centri given that the PD is a constant 7-8psi or higher through the entire RPM Range as well as typically having higher IATs? The Centri builds boost as it rises through the RPM and quite a bit lower IAT's but my understanding is the PD is full boost immediately until you let off.
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The pressure on the pistons is really coming from crankcase pressure which obviously is coming from the boost. It's hard to say for sure if it's harder on them, but it does smack a lot of load to the engine early. At higher RPM it's not as big of a deal as lugging back and letting that valve open under low rpms.