Stephen,
How fast are you planning on turning your engine? I may be mistaken, but I
beleive the stock TR6 crank vibrates at around 6K RPM. Sure, you can exceed
this RPM with carb/FI/engine management/cam/exhaust mods, but do you want to
rebuild every year to maintain street reliability? How often will you be
using all 175 horse?
The early European grind cam, mechanical FI, and stock ignition and exhaust
was good for 150 HP. This might be a good starting point for your engine,
less the FI. Kastner used the Strombergs on his Group 44 cars. Then you
could verify/recurve your distributor and get onto a rolling road dyno. You
might find more power in your present engine with a good tuner.
I have found a clear objective makes the task much easier to achieve.
> -----Original Message-----
> From: owner-triumphs@autox.team.net
> [mailto:owner-triumphs@autox.team.net]On Behalf Of Hill, Stephen M
> EDUC:EX
> Sent: Wednesday, May 17, 2000 7:53 PM
> To: 'msecrest@erols.com'
> Cc: 'triumphs@autox.team.net'
> Subject: RE: Looking for TR6 Performance Info
>
>
>
> I am planning on building a relatively radical engine, hoping to
> get to 175
> plus horsepower. I have triple webers, plans on a fast road cam, shooting
> for 9.75:1 compression, lightened flywheel,etc. I think it is possible to
> build this much power and still have it streetable and reliable.
> I recognize
> the rollers won't do a lot for power (maybe 3hp), but I am wondering if I
> will get more life out of the cam, lifters, and guides. Or is it just
> expensive hardware for racers only? I guess I am hoping to
> clearly identify
> the benefits, and find a reasonably priced source. Moss UK wants
> about $900
> US for rollers, which is nuts.
>
> Stephen
>
> > ----------
> > From: Martin A. Secrest[SMTP:msecrest@erols.com]
> > Reply To: msecrest@erols.com
> > Sent: Wednesday, May 17, 2000 4:40 PM
> > To: Hill, Stephen M EDUC:EX
> > Cc: 'triumphs@autox.team.net'
> > Subject: Re: Looking for TR6 Performance Info
> >
> > Other listers might correct me on this, but I don't think roller rockers
> > are
> > going to do much in the way of additional power for your
> engine. They are
> > used
> > primarily in competition engines as a way of reducing stress at
> high revs,
> > but
> > I know one very good vintage Spitfire racer who uses stock
> rockers on his
> > 1147,
> > and regularly turns 7K with no problem.
> >
> > What, if anything, have you done to your engine? There are lots of
> > possibilities; some cost more than others ...
> >
> > --
> > Martin Secrest
> > 72 TR6
> > 73 GT6
> >
> > "Hill, Stephen M EDUC:EX" wrote:
> >
> > > I just subscribed to this list, hoping to find some folks
> knowledgeable
> > > about getting more power out of the TR6. In particular, I was
> wondering
> > > about using roller rockers. How necessary are these, and are there any
> > good
> > > suppliers for them? I am avoiding Moss UK as their prices are
> > ridiculous.
> > > Any thoughts? Thanks. Stephen
> >
>
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