im spinning my 1071 blowers 2% over driven and making 5lbs of boost. i realize boost is flow related and im running a large duration 720 lift solid roller with 355 cnc cainfield heads on a 598 ci engine 4.530 bore X 4.625 stroke. i was wondering at what precent over driven does a roots blower start to loose its efficiency. how much are you over driving your roots blower and how much boost are you making? what size blower on what size engine? how much hp are you making. thx for any info, rm

24% over 9.5 lbs boost
4.625 bore 4.5 stroke 604cid
.670 lift 272 deg on intake, 280 deg on exh
big heads and real high static compression
1100hp

whats your static? i running 8 3/4, wow dude 24% over thats serious dude! your running 93 octane correct? what type of inter cooler are you running. i wish i was running less cam and more boost to make my 1000hp, i think the valve train would be a lot happier, it was mty engine guys call. what type and size blower are you running? thx for sharing, rm

AV gas.... my cam is hyd also
#'s on the true static I'll have to find
10-71 Mooneys with super chillers

4.600 X 4.500
1471 / superchiller ,littlefield blower
8 lbs @ 4%
.772 intake
.763 exhaust
solid roller 1200H.P on 93 octane