Andrew et al,

I'm taking this discussion off list as it is OT... email me if you'd like
to receive our correspondence!

-Jim

At 07:32 PM 2/2/2006, Andrew Grebneff wrote:
>>The roots is a decent blower, not my favorite, but perfect for
>>making lots of low end if you don't have a screwcharger option. Not
>>sure what you'd imagine a "good" blower to be for an SVX, since a
>>roots or screwcharger for the SVX run $6200+ for the kit alone...
>>and since if you went centrifugal you'd be fabbing a custom setup
>>anyhow, for all the work and money involved you're better off with a
>>turbo,
>
>I was offered a NOS Whipple-made Lysholm for $1580US, WITH
>intercooler (not that an intercooler is needed with Lysholms, but it
>couldn't hurt. It would have been custom-fitted.
>
>>and a weddle for when you chunk your tranny :)
>
>I have a G50 Turbo trans, so not much chance of that in my case...
>
>There's a lot of crap flying about regarding superchargers... such as
>Paxton claiming that theirs is not a turbo and that turbos are not
>superchargers... and which are best.
>
>Exhaust-driven turbos make for good outright power but don't boost at
>low rpm and indeed, even with sequential setups, can't restricted
>boost-range are unsuited for aluminum-head diesels (the heads
>inevitable crack). The exhaust can also be tricky to set-up, is very
>bulky and heats the engine bay.
>
>Roots & Eatons, from what I have been able to discover, both have
>serious blowby and turbulence problems, and heat the inlet charge
>considerably. They were designed in the 1800s (!) as foundry furnace
>blowers, and are FAR from hi-tech.
>
>Paxtons are belt-driven turbos, with worse revband problems than
>exhaust-driven turbos. At least they don't heat the inlet charge
>much... but that's their ONLY advantage.
>
>Lysholms (slang: screw-type or twinscrew), now licensed to Whipple
>and Eaton to produce, boost right through the rev-range, suffer no
>blowby or turbulence problems, and produce minimal heating.
>--
>Andrew Grebneff
>Dunedin
>New Zealand
>Fossil preparator
><andrew.grebneff@stonebow.otago.ac.nz>
>Seashell, Macintosh, VW/Toyota van nut
>
>HUMANITY: THE ULTIMATE VON NEUMANN MACHINE
>
>DEMOCRACY: RULE BY THE LOWEST COMMON DENOMINATOR
>

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