On Wed, 27 Aug 2008, Kendall Larsen wrote:
>>> Just tossing in a whopping cam does nothing until you get to 9:1 and more.
>>> It does a LOT when you get to 12:1, but then you can't drive on the
>>> street.
>
> Hey RML,
>
> What does that really mean. "Can't drive it on the street?"
>
> Won't idle below 1500 rpm?
Depends on the cam. My Piper BP 270 idles nicely at 900 or so.
> No low end torque?
Nope - PLENTY of low-end torque. My race car is set up to pull from 2000
to 7000. Power is everywhere. But I also run gears (4.33 rear witha quaife
and the "triumph close-ratio" setup with the 1.73 1st gear). So with the
gearing, you pretty much have to light 'em up to get a smooth take off.
> Can't drive it until fully warm?
You can, but most racers WON'T. Cold oil means BIG PRESSURE. Also, the
pistons (forged Venolia) rattle a bit when cold.
> On / off throttle response?
This is no prob. The current motor is pretty smooth from slow to fast.
> 106 octane fuel only?
Yep. I ran pump gas with 94 octane one. hammered a rod bearing. I'll never
do that again.
I actully run 110 leaded, but that's because it's all I can get from the
local race fuel vendors. I could get away with unleaded as long as it's 98
or more octane. Otherwise I have to back off the timing a lot.
> did I miss anything?
nope. The fuel is the biggie. If I ran less ignition advance, I could
probably run the 10:1 motor on the street, but the power is overkill.
The "thing" about TR6's is that they handle, not that they take off like a
rocket.
But to make the race car streetable, I'd have to raise it (currently the
front sway bar mounts are 1-7/8" from the ground then the car is level)
and it is really easy to bottom the car out. I also only fit 23x9x15
slicks which pick up everything on the street - punctures are pretty easy
to get. There's also no lights (extra weight - C YA!) and the roll cage is
good for roll overs, but BAD for drivers with no helmet. I can't speak for
all states, but I know that driving a car with a helment is illegal in my
state!
But the car is pretty impractical for the street. It can accelerate pretty
quick and it changes directions extremely fast... it's not a go-kart, but
it's pretty close considering that it weighs 1600 pounds more than one.
> Kendall
rml
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Bob Lang NER/SCCA | This space for rent
Solo Chair 2008 TR6 40 F Prepared | Triumph!
Voice:781-438-2568 FAX: 617-258-9535 | Cell: 339-927-4489
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