From digest.v6.n268 Fri Mar 7 16:06:56 1997
From: "Jason H. Leung" <jleung19_at_idt.net>
Date: Sun, 23 Feb 1997 23:55:21 -0800
Subject: E36 powerdyne supercharger inertial belt failure
Charles Quarton wrote:
The Powerdyne supercharger used on the E36 upgrades by both Dinan and ERT
has suffered from occasional reliability problems. The internal belt
drives the induction pulleys (and sometimes an internal bearing) has
in the E36 upgrades. The failure rate was aggravated by track use and
particularly by high temperature days at the track. The same Powerdyne
unit is used on Mustangs and has suffered track induced failures in that
application too. Apparently, the failure rate of the internal belt or
bearing is quite a bit lower for street use.
The Powerdyne unit as modified by Dinan, includes a cooling duct that
supplies air to the formerly sealed chamber for the internal belt. I
that there were also internal changes in the supercharger to improve the
(this is not a complete quote)
Acutally, I believe (correct me if I am wrong) that B&M, who makes
superchargers under both the B&M name and the Powerdyne name,
has redesigned their centrifugal Powerdyne unit under intense
pressure from Dinan, ERT, and Turner to address the inertial
belt failure problem. It seems that one side benefit to this
design is that the supercharger is now much quieter.
I have driven E36s with the old design, and I have have
driven E36s with the new design (MINE! :) ) and the lack
of supercharger whine in the new unit is phenomenal.
In sum, I believe that the redesigned supercharger is not
exclusive to Dinan, but in fact, is avaiable for all tuning
companies to use.
Jason Leung 1992 325iK
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