Thread: Supercharger/blower questions

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Rod, I have a B&M Powercharger 250 on my 406. It is the same blower you are interested in.
My engine is an after market Rodeck block with Brodix Track 1 heads. Crane roller cam. Here are the specs since you were talking about a cam that works in the 3000-7000 rpm range. This one's range is 3000 to 6500 with valve float at 7000. 539/558 lift, 292/300 duration @ .004 lift. This cam is ground on 112 LSA. I'm running dual Edelbrock 650's, one is a 1405 the other is a 1406, that are boost referenced. I also reworked them so the jets and metering rods are all the same between them. This is just for a baseline, I will tune from there. I chose this blower because I wanted it to fit under the hood (if I choose to run one) on my '31 Ford Coupe. I also wasn't interested in the little long snout blowers. This blower looks like a larger blower but fit my space requirements.
If you need a height measurement I could get you the dimension on Tuesday, as I worked all day today (Sunday) and will be working all day tomorrow. If you would like to check out my toy here is the link, Flickr: blwn31's Photostream. There are a few pics of the complete engine.
When I first got the blower and installed it, it was pretty noisy due to the rotor sealing Teflon strips. It quited down after a little run time. I have never had a problem with any of it coming loose. Now I haven't run the motor hard yet. I've put about 2000 miles on the blower so far. The motor will KILL my trans, so gotta upgrade it. My static compression is a approx. 8.52:1. I run this motor on 91 octane. One thing about this blower is it's a 4-71, so on a larger cubic inch motor you need to turn the blower harder to get the same boost. This in turn will limit higher rpm use without some kind of intercooler. I haven't had this motor on the dyno yet, but from what I've read this blower probably is done at about 5500 revs. For me this isn't an issue, no racing here.

Keith