I had an expensive independent engineering firm do a survey of the
TR-6 crankshaft in about 1969 or 1970. Their recommendation was that nitride
treatment to the crank would improve the strength (livability) 50%. It proved
true.
----- Original Message -----
From: SHANE Ingate
To: britcars@bellsouth.net
Cc: fot@autox.team.net
Sent: Wednesday, August 17, 2005 9:27 AM
Subject: RE: Rods?
Barry,
The low rpms of the TR6 is due to its rubber-band crankshaft. There are
nasty resonances at around 6200, and then again at 7800 (I think). A
billet-steel crank eliminates that, and the you can wind out the straight
six to over 8000 with safety (so I have been told, but make sure all other
components are up to the task).
Shane Ingate in Maryland
Barry Rosenberg wrote:
>Compare your TR6 rods to a TR4's. Ours are almost twice the size. Wish
>the TR6 would work in a TR4. And with such small rods and pistons, why do
>they say a TR6 will not live at much over 6,800 rpm or are they just
>fibbing? Who would be honest and say how high they actually rev their
>engine. My TR4 limiter is set at 7,200. Barry
|