Bryan;
I suspect that part of the difference between marine and motorcycle engines
is due to their intended application. A marine engine is designed for
continuous high output power while a MC engine is designed for short bursts
of power.
I'll bet the marine engines are de-tuned intentionally to preserve their
reliability. ... Just my take on this.
Regards, Neil Tucson, AZ
-----Original Message-----
From: Bryan Savage [mailto:basavage@earthlink.net]
Sent: Wednesday, October 01, 2003 1:53 AM
To: Russel Mack
Cc: John Beckett; Dana; Land Speed
Subject: Re: V-Max and other odd motors
Russ,
Motorcycles are what I was thinking about. What size 4 cycle will keep
up with a 500cc GP
2 stroke. The outboard is restricted in RPM and power by the restrictive
exhaust (under water)
system. Using 6 good expansion chambers and alky & 30-60% nitro I think
the power would
be limited by the strength of the parts. I COULD be a very potent NA
fuel motor but I'm sure
a pare of Suzuki Hiya..whatevers, producing about the same power would
cost half as much or less.
It's just an interesting thought,
Bryan
Russel Mack wrote:
>Bryan--
>like I said, the figures they give for the outboards are surprisingly
>puny.
>
>for $1000 (or so), you can get a low-milage salvage liter-bike engine--
>half the displacement-- with 140 (or more) HP, STOCK.
>
>(That's $7 per horsepower-- including an excellent transmission. That's
>2.3 HP /cubic inch, without any special race buildup!)
>
>That exotic racing Mercury's 180HP is easily within reach-- on gas-- on
>half the displacement. A good hot-rodder could probably find that 40
>more HP for less than $500.
>
>Because of these figures-- as much as I like 2-strokes, I think the
>outboard motor idea seems not very competitive. Russ, #1226B
|