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Old 01-08-2004, 08:04 PM   #4
Slow in, slower out
Join Date: Dec 1969
Location: Awesome, NJ
Posts: 4,646
My Ride: 325it
Originally posted by tim330i
a bunch of different tuners have been trying this idea and have dropped it....makes me wonder why.


A positive displacement blower is the most difficult to package under the hood of a tightly packed E46 because it is larger than a centrifugal supercharger. The pushrod crowd has traditionally mounted a positive displacement blower on top of the lower intake in the lifter valley between the cylinder heads at the expense of intercooling. In recent history, Ford managed to put an intercooled Roots blower in the lifter valley of the 3.8 V6 Thunderbird SC by routing the outlet out the back of the case and around the motor to the front of the car. Cooled air then entered the intake manifold just in front of the blower. This method used up a ton of space in the T-Bird but the car had space to spare with that long hood.

FWIW, I have an Eaton M60 blower from alow milage T-Bird that I was going to retrofit to my old E28. Removing the AC created gobs of space under the block on the passenger side. I sold the car before I was motivated to start making brackets. One of these days I'll pick up a nice E12 and boost the snot out of it.

Mod the driver. Participate in your local BMWCCA autocross or driving school. Have you joined BMWCCA yet?

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