Dick wrote,
>I noted with interest, your opinion that 155hp at the rear wheels would
be
>needed these days to make a Alpine competitive in class.
Note: I said 130 BHP at the wheels. (155 at the crank).
If I could make a 1725 make 155BHP at the rear wheels, I'd quit
this Electronics Engineering gig, and start up that race engine
development operation that fills my dreams with smells of
benzene and carbon monoxide.
>I do not argue this opinion but would remind you that acceleration
(torque)
>is what gets you out of a corner quicker than the other guy and if your
car
Torque is cool, but its the torque to the REAR wheels that gets me
going.
If I take a 20% increase in gearing by a 3rd 4th shift, but lose 25% of
my
engine torque, I should re-evaluate why I shifted. Horsepower allows
me to use higher numerical gears to put more torque at the wheels.
>I don't think I could build a "legal" SCCA Alpine engine which would
make
>about 165 hp at the flywheel and deliver 155 at the rear wheels!!!
I am possitive such a beast could NOT be built in any but a modified
class.
Today, the SCCA doesnt allow for bores beyond .040.
If I could bore the motor out to 2 liters, I could make close to 200
BHP.
>Do these 10,000rpm Srites or MGBs etc. really do this output on an
accurate
>chassis dyno?
Yes, chassis dynos.
>I cannot imagine an iron head 1500cc Sprite/Midget engine
>doing this because that means that a 91.5 cu. inch outdated tractor
engine
were talking 1275 A series motors here.
1275 where went an 850 or 950 motor, straight cut gears with gearing
that was not available till 20 years after the car could have raced.
Hence the term "cheaters".
They have new castings for cam-shafts that could not be made in the
60s, roller rockers, trick modified heads titanium con rods, you name
it, they made it, and with so many of them to buy the cheater parts,
the parts were cheap, and of course everybody has them, so you
cant tell who is cheating, now can you?
I think a 1.5 BHP per CID (93 BHP per liter) is reasonable
for an all out 1725.
I have access to both a chassis dyno as well as a stand alone.
When my motor is done in a few weeks, we'll see if this is the
case.
This will make for a motor, that could NEVER be driven on the
street, so the discussion value of such a motor is probably mute.
Jarrid Gross
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