EGAD! 144 at the wheels? I never could find a chassis dyno in the
Sacramento area so I never put it to the test. Yikes.
As to "cheating", Peyote had the advantage of being an old SCCA Modified Class
car. E-Mod to be exact. Let a lot of room for "stuff" to be run. It's the
so-called production cars that run into the old rule books.
BTW, Bill, Gerry Wilburn (Peerless Ambro) probably just had a heart attack.
----- Original Message -----
From: Bill Babcock
Sent: Wednesday, August 08, 2001 4:49 PM
To: GRMTim@aol.com
Cc: fot@autox.team.net
Subject: RE: How much horsepower?
Horsepower = Torque X RPM X C
Where C is a constant derived from unit conversions and money
I got 144 at the rear wheel for Peyote, 131 for the Cheater TR3. Different
dynos, different days. Your mileage may vary, etc.
Peyote has a steel crank, Carillos, 89 mm pistons, no idea what the cam
is, lots of headwork, Webers, very good header (custom) and a very
aggressively shaved head. Absolutely needs o-ringed head gaskets. I
haven't cc'ed it 'cause Baxter did it, but it needs a little race gas
mixed into the premium. I rev it to 6200 and some of the folks like Hardy
say "stand on it, ya big sissy!".
The Cheater has 87.5, Webers, an Erson cam, stainless header, I did the
head porting, and it's shaved minimally (probably .020"). Stock reworked
rods and nitrided crank. I rev it to 6000 and hold my breath.
Both have lightened flywheels, fancy clutches and harmonic balancers
I think the biggest things that helped me get horsepower are: Big pistons,
cam and timing aimed at 5500 to 6000 RPM, compression and head porting.
But you've got the two most knowledgeable Triumph HP guys on the planet on
line here--Hardy and Kas. Shit, Hardy's initials are HP.
As far as money goes, the TR3 motor seems very cheap to do things
to--probably because it's so limited, everything is an improvement but you
can only do so much. What are you going to do to a cast iron, pushrod,
four cylinder engine? I've probably got $6000 into each. In some ways
that's a lot of money. But I spent a lot more doing less with other cars.
Like just rebuilding my old Maserati Mistral motor. Yuck.
-----Original Message-----
From: GRMTim@aol.com [mailto:GRMTim@aol.com]
Sent: Wednesday, August 08, 2001 3:44 PM
To: fot@autox.team.net
Subject: How much horsepower?
Okay, JK and I spent the day at the dyno with the Grassroots Motorsports
TR3.
Remember, this is a near stock engine with the head shaved, a Kastner G3
cam
a decent valve job and reworked SUs and a header and straight pipe.
We started the day with 97hp ((4900 rpm) at the rear wheels and ended up
with
104.5. Torque figures started at around 115 ft-lb. at 4000 rpm and ended
at
120.
JK says we are down nearly 30 hp to the front runners like Mike Jackson
and
Jeff Snook.
Okay, guys, give it up... what should a well tuned LEGAL TR3/TR4 engine
make
for power, and what type of $$$$$ commitment will it take to get there?
Tim Suddard/Grassroots Motorsports
P.S, We are constantly updating our website and making reports in our
magazine about this ongoing project car. www.GrassrootsMotorsports.com
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