[TR] Building a 150 hp engine

[Joe Curry]

You have to be very careful adding a supercharger to an already prepared
engine because the equivalent compression ratio increase may push the engine
over the top as far as reliability is concerned.  I am not all that sure
that a stock engine would be very reliable with the added boost of a blower.
The lower end of our little engines is pretty weak by comparison to the
engines that come equipped by design for blowers or turbos and unless you
actually lower the standard compression to offset the increase caused by the
blower, you may end up doing a lot of damage to the bottom end.  Things like
rods through the block or broken crankshafts.

My 2 cents worth


Joe C.

----- Original Message ----- 
From: <Chip19474 at aol.com>
To: <triumphs at autox.team.net>
Sent: Friday, July 13, 2007 10:22 AM
Subject: Re: [TR] Building a 150 hp engine


> In a message dated 7/13/2007 1:05:08 P.M. Eastern Daylight Time,
> tr3driver at ca.rr.com writes:
>
> Which is  ironic, since it's reputedly easy to get that much using the
> ordinary (and  less expensive) mods : camshaft, compression & breathing.
Kas
> Kastner claimed he could get more power with the ZS carbs than with  the
> Lucas PI.
>
>
>
> I have theoretically (by calculation versus actual dyno) obtained at least
> that much horsepower following Kas Kastner's race prep guidelines for
cylinder
> head prep, etc; advice from Richard Good from Goodparts on
camshaft/rockers,
> advice from Dick Stockton on carb tuning, ignition.......all from using a
> triple ZS carb setup with B1E Jag needles.
>
> I've seen the Moss supercharger installed on a TR6 - it looks pretty slick
> and I'm told it runs very well and I suspect that it wasn't as difficult
to
> "dial -in" as my setup was.  The supercharger wasn't available in 2002
when the
> bulk of my engine work was done as part of the restoration so I can't
speak
> to cost comparisons but, from what I've read and seen, the  supercharger
kit
> seems to be a very nice power adder.  One thing that  appears to be
evident
> with the supercharger is that the engine note in the  exhaust isn't as
"TR6" like
> as stock or modified TR6's....it  sounds more "modern" - don't know how
else
> to explain it!
>
> Chip Krout
> Delaware Valley Triumphs, Ltd.
> Skippack, PA   USA
>
> '76 TR6 CF57822U