On Wed, 13 Nov 2002, Glen Johnson wrote:
> Hi guys,
Howdy.
> I couldn't help but get interested when Shane started talking about
> engine notes and going hard on the tacho.
Oh yeah!
> My Car is fully detailed on www.triumphowners.com.
Kool. Interestingly, I was thinking just this weekend past how nice a 2500
saloon car would be in my stable. Now all I have to do is find one here in
the USofA and come up with some funds to acquire same.
:-)
> I have (in short) a fully balanced, injected motor with extractors, K&N,
> custom ignition and so on.
Kool.
> I took the old girl out for a quick bash last week and pulled 7200RPM
> (well the tacho just didn't go any further so it may have been more) and
> DAMN it was nice. The noise was quite insane - smooth but a scream -
> and it wanted to go harder. I've been going easy on the new motor and
> only going to 6500RPM but I had a passenger and he needed cheering up so
> I dumped it at an intersection in 1st and just kept the foot down until
> I got scared.
Keep going 'till you see GOD, then brake!
> I wouldn't do this for very long as I reckon the crank will let go but
> for anyone that wants to rev hard I suggest they check over my motor at
> the link below - because I've successfully got it revving.
I need to comment on this. A properly tuned TR6 motor will turn lots of
RPMs. There is a problem though - there is a harmonic resonance at 6300
RPMS (more or less) that wreaks havoc with the crank... over time, you
will get strees cracks on the crank throws.
If your goal is to turn your motor like this frequently, you should
consider getting a harmonic dampener (better than the stock unit) and you
should balance to a very high level (like within one gram or so). You
should also nitride (tuftride) the crank to get more strength.
Finally - if money is no object, a billet crank (aka "a steel crank")
would be better for this task, but a TR6 motor turning 7k rpms will really
strees the crank.
Kastner quotes a motor (2.5l bored .040 over, PI and over 12:1) as turning
252 HP at 8000. WOW. Expect to replace a lot of cranks if you use the
motor like that.
> Regards,
>
> Glen Johnson
C ya,
rml
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