From digest.v4.n771 Tue Jun 25 19:45:45 1996
From: Jeff Tarr <jtarr_at_panix.com>
Date: Tue, 25 Jun 1996 21:22:13 -0400 (EDT)
Subject: Re: E36 Superchargers
I thought I'd jump in on this E36 M3 supercharger thread since I just
got one from Turner Motorsports...
> Previously, Charles Quarton <chazq_at_ix.netcom.com> stated:
> The Turner unit uses higher fuel pressure to achieve a higher fuel
> injection. This technology lacks the precision of the higher capacity
> injector with electronic control. It may well be that the less
> sophisticated design of Turner takes less time to install but it is still a
> major job.
This is not true. The Turner unit does similar things as Dinan:
relocates the cruise control and filter canister, new drive pulley for
the blower, the fan shroud is cut away to clear the more forward fan
location, new higher capacity fuel injectors, and new chip. The Turner
unit does not require the added electronic unit to measure the air
and injectors as the Dinan unit does. (My own personal understanding is
because Turner's unit has a more developed chip which can handle everything.)
Additionally, Turner's unit includes a larger air mass meter which
is also handled properly by the chip (you can't run a larger air mass meter
on a regular chip.)
Having driven the car a thousand miles over the past few days I can
say that Turner's unit is excellent for all around driving. Driving
in the city is simple - the power delivery is totally smooth. On the
highway things are equally smooth. However... when you go to pass someone
and the tach hits 4500 or so the power gain is phenomenal and the speed
gets up there real quick! The first few passes I made after picking up
the car were unreal. Now that I'm getting used to it I can't believe
how slow the car used to be!
> I understand that the Turner unit is very fast too but it has drivability
> issues. The design goal was power with less emphasis on the "without
> sacrifice" factor. The unit does not come with a warranty and the
> reliability is for you to test.
Having spoken to Turner about this, as well as ERT (the people who
developed the kit), this is defintely not true. Their kit was
designed for the driver who does everything from city to country to
track. There is a one year warranty.
> My opinions: if you want performance and reliability choose Dinan. If you
> want to spend less and test a potential hand grenade choose Turner.
My opinion (since you asked! :) ): Both companies sell great products.
Turner Motorsports tests all of their products on the street and on the
track. At any time you can call up Will Turner himself and ask him
anything you need to know. Whenever Will is at the track people are
always asking him for help with repairs and upgrades - everyone in the
north east agrees he knows what he is talking about. His supercharger
kit costs less than Dinan's and gives about the same power (I have
not seen any official Dyno results for Dinan's. My car put out 350 HP
on the dyno (and I've got the print out to prove it!)).
One last note: Turner's supercharger kit is black. When installed
it looks factory! The picture's I've seen of Dinan's kit show a
silver blower which stands out.
From digest.v4.n770 Tue Jun 25 17:44:51 1996
From: Charles Quarton <chazq_at_ix.netcom.com>
Date: Tue, 25 Jun 1996 15:14:03 -0700
Subject: Re: E36 Superchargers
>From: Armand_Aquino_at_mc.xerox.com (Aquino,Armand)
> throttle body and exhaust. They [Dinan] claim installation just for the
> supercharger to be 20 hours, while Turner claims about 6.5 hours.
> Seeing the installation myself, I would tend to believe Turner.
I think that the installation time for the Dinan unit is a fair time for a
skilled installer. More is involved in the installation of the Dinan than
just "bolting on" the supercharger. The Dinan installation relocates the
cruise control and a filter canister from the left front of the engine
compartment to the empty battery mount in the right rear. The radiator is
removed to install the drive pulley and a portion of the fan shroud is cut
away to clear the more forward fan location. New higher capacity fuel
injectors are installed with the injection dwell controlled by the chip. An
electronic unit is installed to translate the new fuel injection
characteristics for the O2 sensors etc. Some fabrication is required to
route the air intake for the supercharger downward to receive air from the
lower part of the air dam.
The Turner unit uses higher fuel pressure to achieve a higher fuel
injection. This technology lacks the precision of the higher capacity
injector with electronic control. It may well be that the less
sophisticated design of Turner takes less time to install but it is still a
The Dinan unit is engineered to have excellent drivability characteristics
and reliability for street use. Their motto is "performance without
sacrifice". The unit went through extensive testing and it has a 2 year
unlimited milage warranty. Dinan's view is that engineering for street use
includes track schools and hooray for that. :)
My experience with the Dinan M3 supercharger, basically the same unit as the
325, confirms the excellent drivability. In normal street use there is no
change from stock. However, when you add lots of throttle and the revs are
above 3500 it is a rocket. The dyno results, both butt and data curves,
show large torque gains from 3000 to red line. The unit is tuned to run on
92 octane gas (highest available for the street in CA) with no
pre-detonation. I have never experienced any pre-detonation with the 92
octane CA fuel.
I understand that the Turner unit is very fast too but it has drivability
issues. The design goal was power with less emphasis on the "without
sacrifice" factor. The unit does not come with a warranty and the
reliability is for you to test.
For me, the Dinan unit was well worth the money. Before I purchased, I
talked with several Bay area BMW owners running Dinan turbochargers, this
was the first supercharger unit. The report was unanimous that there were
no reliability problems. Adding forced air induction is a major step that
can produce huge gains. It can also blow a very expensive motor if it is
not done right. There is no way I would take the plunge with a unit of
My opinions: if you want performance and reliability choose Dinan. If you
want to spend less and test a potential hand grenade choose Turner.
The Dinan package has to be stout before I would risk letting a doofus like
Rich B. run a test drive at our M3 gathering :) That man is an animal that
loves full throttle to the red line. Of course he was never observed
exceeding the posted speed limit, posted in Montana that is.
By the way, the highest placed BMW in the One Lap of America was a private
entry M3 with a Dinan supercharger. The motor performed with no problems in
an event that is hard on cars, basically race at the track and then rally
stage to the next track. The finish was particularly good when you consider
that this was a private entry competing against factory sponsored machines.
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'95 M3 Dinan suspension and supercharger