From personal experience, when you push the stock TR6 motor above ~6000
any length of time things tend to fly off or break. I have broken a crank
and thrown several rods on different occasions. Rods are in my experience
are generally problem from worn bearings, but crank was me racing a high
school buddy in a CRX on I-10 towards El Paso from San Antonio at 100+ mph.
[mailto:firstname.lastname@example.org]On Behalf Of Randall Young
Sent: Friday, June 06, 2003 11:30 AM
To: Keith; email@example.com
Subject: RE: Connecting rods TR6
> > 4/ What hp does the standard TR6 develop?
> 104bhp for the US market, 145bhp for the early PI cars available in the UK
> and also Australia.
Just a side comment on this figure ... the stress on the rods is greatly
affected by engine rpm (square law as I recall, but it might be cube) and
the TR6 is a fairly slow-turning engine. Getting one to be reliable above
5800 rpm is quite tricky, and I've never heard of anyone turning one above 7
grand for any length of time. The rods may not be the limiting factor (the
crankshaft design is weak), but it's something to take into account if your
Ducati motor turns faster than the stock 5k redline of the TR6 car motor and
you're trying to compare rod stresses.
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