[DMCForum] Re: Turbos

["M. P. Olans" <mpolans@xxxxxxxxxxx>]

Guys,
     I have the Island Twin Turbo kit.  IHI RHB's.  I've heard newer 
kits come with ball-bearing IHI RHF's.  I have over 30,000 miles on 
my engine with no problems.  Did a valve adjustment in April and 
aside from one being way out, everything looked good on the top 
end.  I only run 6psi at 1500 ft. AMSL to keep everything intact.
     I really like having the extra power at my toe-tips.  I don't 
have to wonder abotut being beat out by a lawn tractor or a Geo 
Metro....:)  It is a fairly straightforward kit to install although 
if you aren't familiar with drilling and tapping it is best left to 
the professionals.  For anyone who has the cash and isn't into an 
engine swap I'd recommend this kit.  Come see me at the AZ-D table 
in Pheasant Run for more information.

Matt Olans
VIN 16816


--- In DMCForum@xxxxxxxxxxxxxxx, "therealdmcvegas" <dmcvegas@xxxx> 
wrote:
>
> --- In DMCForum@xxxxxxxxxxxxxxx, "Josh Porter" <joshp1986@xxxx> 
wrote:
> >
> > I know this comes up alot but I could not find the answer I was 
looking 
> > for in the archives.
> > 
> > Other than the Legend turbos, are there any other brand of 
turbos that 
> > fits on the PRV6? I'm not wanting one right now but would like 
to have 
> > a twin turbo situp in the future.
> > 
> > Josh
> > 10989
> >
> 
> There are the Island Twin Turbos, but while they're are powerful, 
it's
> a crappy desgin IMO. On that car, the turbo charges sit between the
> throttle plates, and the intake manifold. So let's say you're 
stomping
> on the engine hard, and the turbos are running boost. The air 
passages
> after the compressor are under pressure, which is normal. BUT, 
let's
> say you took your foot off the gas pedal. Now the turbo units are
> under Vacuum, which is not a good thing. The vacuum will break the
> seals on the turbo, and allow oil to slowly seep out. Which is why
> some turbo charged DeLoreans with the Island kit have black exhaust
> pipes. It's not any internal damage to the engine, just a problem 
with
> the seals breaking.
> 
> With the Legend design, the throttle plates would close, and cut 
the
> vacuum off from the turbo units. So you didn't really have this
> problem. Many late modem VW TDI cars have this same problem. 
Except on
> their cars, they also have to contend with diesel exhaust, so their
> entire intake manifolds clog up. Just something to think about if 
you
> decide to design your own system later on...
> 
> Otherwise, there is also a single turbo unit as well. But it's 
another
> design that places the unit between the intake manifold, and the
> throttle plates. For those, they've always looked the same to me. A
> welded flange on the turbo, and it mounts in place of the Catalytic
> Converter. The oil feed is tapped directly off the block on the
> drivers side, and is driven by the interal engine oil pump.
> 
> I probably won't get to install the turbos I bought for at least
> another couple of years. But I picked up a couple of IHI RHB-5 
units
> from some Ford Probes. These are almost the same ones that Legend
> used. I say almost the same, because these are also water cooled. 
The
> impellers are visably different too. And on the one unit, I can 
twirl
> the tubine with a single finger, and the compressor will actually 
blow
> a slight breeze out.
> 
> -Robert
>

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