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Re: Super or Turbo Charger kit. (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by Eric on February 29, 2000 at 21:27:38:

In Reply to: Re: Super or Turbo Charger kit. posted by Brock Fraser on February 26, 2000 at 01:00:44:

: Eric,

: I think the cost estimate is on the high end of what it could actually be. Done right, the engine life impact due to supercharging should be negligable since the on-boost duty cycle is so low.

: Where do you live? I don't think I need a Guinea Pig, since I own one of these cars myself... but who knows... maybe there would be "beta" kits that would be sold at a lower price in exchange for detailed initial feedback about the kit's performance and durability.

: The other benefit of this whole deal over the turbocharging concept would be the ease of installation. I'm thinking that an electric radiator fan is an essential part of the kit to make an acceptable belt drive for the supercharger.

: : Cost sounds about right. I own a 91 535 5-speed and I can tell you there are very few options out there for easy HP. I think about trading up for a used M3 but I like the space in my 5. One concern I would have is how long an engine with 68,000 miles would last after supercharging. Need a Guinea Pig?

:
: : : I have been considering developing a supercharger kit for the E34 535i. I'm typically more involved with turbocharged engine development, but my take on driving the E34 (as an owner) is that a twisted-roots or screw supercharger would be a better mate than a turbo. I think an inexpensive low-boost (5-7psi) non-intercooled system might be best, since these cars are coming down in value and nobody wants to get too upside-down on what they have invested in a car. What are some other opinions? Would a 100-125hp kit be attractive in the $3,000-$3,500 range? Is there a market? Does anybody know how many M30 equipped E34's were made?




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