Gerhard. Wiederholl writes:
>It=B4s hard to estimate the number of HPs of a modified engine but you c=
an
check
>Kastners competition preparation manual to see the power gain that come=
s
only
>from a 10:1 compression and a S 2 cam.
>However I found the formula to calculate the HPs on the clutch of a TR 6=
.
All
>you need to know is the exact top speed of your TR 6. You can also use i=
t
to
>calculate the HPs you need to get a desired top speed.
>HP on the clutch =3D (speed in km/h) EXP 3 / 37 EXP 3
>(37 is the product of all the drag factors of a TR 6 with cw, front are=
a,
drag
>from tires, gearbox and wheel bearings etc. considered . Ragtop up.)
>
>Example for a TR 6 PI:
>POWER (HP) =3D 193 km/h EXP3 / 50653 =3D 7189057 / 50653 =3D 142 H=
P
>In a motor magazin a 1969 TR 6 (German version) was measured 193 km/h or=
121 mph
>and the claimed HPs were 143.
>Example for a US TR 6:
>POWER (HP) =3D 174 km/h EXP3 / 50653 =3D 104 Hp
>(R&T Feb.1969 maesured a TR 6 109 mph or 174 km/h and the HP number the=
y
gave
>was 104)
>Regards
>Gerhard Wiederholl
>CC 31998 LO
This may not be perfectly accurate but it is certainly close enough
for our purposes. This also raises a possibility for a new competition
at the VTR events:
The Brake Horsepower competition. Participants will compete for
horsepower ratings and will use as proof of actual horsepower their
speeding citations. Of course the participants will need to request
the officer to document the prevailing head/tail wind.
Dave Massey
P.S. JUST KIDDING! I'm not advocating top speed runs on public roads
(unless you are on the autobahn where the other motorist are expecting
it)
|