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Re: Supercharged LBC

To: "Michael F. Adamson" <>
Subject: Re: Supercharged LBC
From: Mike Lishego <>
Date: Sat, 03 Jan 1998 02:47:57 -0800
> >The technology has been around for ages.  Has anybody out there
> >supercharged a B?
> >
> >Regards,
> >Michael.

Oddly enough, I was recently thinking about trying the same thing for my 'B.  
my idea:  I have a set of hopeless dual SU's.  Use each dashpot as the housing 
for the 
turbine.  Find or fabricate a turbine from aluminum and modify the dashpot to 
suck in 
air from a side port.  The top of the dashpot would face the radiator, and each 
dashpot would be mounted side by side and driven by a single pulley, with the 
connected by gears.  This assembly would be mounted below the carbs, by the 
water pump 
pulley, and wouold be run by a longer v-belt.  The air would travel from the 
turbines to the SU intakes by means of aluminum or steel pipe that is custom 
for the application.  The air intake tubes would be mounted to the old SU 
which would be mounted to the SU's where the air cleaners went.  I would also 
fit a 
screen mesh between the turbines and the intake tubes, along with a cone air 
filter to 
the end of each air intake.  
        OK, here's the tricky part:  This setup needs to negate the car's 
vacuum to be of any use, and it should actually be somewhat higher than the 
vacuum to 
see any real boost.  I seem to remember that Dodge vehicles use a turbo boost 
5-8lbs, while the earlier Saab turbos could run as high as 20lbs.    
        Obviously, the turbines would be spinning full-time, so tests would 
have to be 
made to ensure that the turbos didn't hit their peak at say, 4000rpm.  If this 
happened, the engine would be choked.  On the contrary, the turbos shouldn't 
put out 
too much boost at low RPM's either.  
        As for lubrication, I dunno.  I was thinking of fitting a roller 
bearing to 
the tip of the turbine where the shaft fits in to the dashpot, but I don't know 
how I 
could lube it.  I'd have to fabricate the mounting bracket, the drive gears, 
pulley, and each turbine.  That's alot of work, especially if the boost doesn't 
cover the vacuum pressure!  I thought of using the gear from an old camshaft 
(the gear 
that turns the dizzy) for a turbine, but I don't think it would be large 
enough.  My 
best bet might be to have a machine shop mill one for me from a block of 
aluminum.  I 
also thought about stacking three or four old electric fan blades from the 
MGB's, but I dunno if the plastic blades could stand up to a hellacious boost 
without disintegrating.  Of course, I couldn't use the SU bodies for this, but 
it's a 
thought though...
        So, my first step would be to create one of these contraptions and 
figure out 
what kind of RPM's the turbine would be spinning at, then bench test it, if 
to assimilate the boost values, then compare them to the vacuum values from my 
>From there, it might be feasible to mount them to the car and test their 
>effects on 
the engine at different RPM's.  However, this is just an idea that came upon me 
my North Carolina history class.  
        OK, for anybody who has read this crazy scheme to the end, what do you 
 I'd especially like the advice of the self-named Old Farts who have been 
superchargers and turbos for a while and know their characteristics.  I'd also 
like to 
know what effects this would have on my engine.  Would I have to upgrade my 
lifters, rockers, crank, etc?  Would I run the risk of detonation, or even 
seizure?  Keep in mind that I really don't have the time/money to pursue this 
at the 
moment, but it's something that I've been refining in my head.  It might become 
project this summer, if the laws of physics don't disagree with my ideas!  
        Thanks in advance for any advice, criticisms and flames.  Yes, the 
flames will 
be handy when I decide to roast some chestnuts...8-)

Michael S. Lishego
St. Andrews Presbyterian College
Elementary Education Major,
English Minor, Class of 1999
R.A. of Winston-Salem Hall

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