Flywheel pin information for KH motor

[Eric]

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Well the flywheel is still at the machine shop.  I was talking to the owner=
 and he said he could easily get 2 lbs or so out of it.  I may see how much=
 $$ he wants to do that.  That might be a good compromise.  Either way I wi=
ll be able to add another data point to the collective knowledge.

Thanks for the info
Eric

Original message attached.
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Eric, I think the key here is that "heavier isn't better",a but the right
weight flywheel will definitely wake up the motor.  I've run 11lb alum
flywheels, the car is still very driveable, revs noticeably faster in lower
gears (which is really nice is 2nd and 3rd, 1st doesn't really need to be a=
ny
faster), turbo spoolup isn't noticeably different.  Some who've said they've
removed about 3lbs from the outside of the flywheel are definitely on the
right track too, the factory definitely went overboard with the weight of t=
he
flywheel on these cars.
Javad
In a message dated 8/6/2003 11:39:48 AM Pacific Standard Time,
eric_audi.ql at mindspring.com writes:

Yes I understand that every bit of inertia robs torque during acceralation.=
  I
have never driven a turbo motor with lightened flywheels so you are correct=
 I
am working on theory in that regard. I have driven wild NA cars with alumin=
um
flywheels and multi-disk small diameter clutches.  One accelerated so quick
you had to leave your hand on the shift lever until you were in 3rd gear or
you would slam the 9000 rpm readline.  VERY fun, but I think I would last
about 1 day before I was in jail with that particular car.
My point with the street turbo is the extra inertia of a stock flywheel,
although not idea, does have a nice side effect of spooling the turbo faste=
r=2E
I am curious to those 4kqt owners out there with lightened flywheels.  From=
 a
rolling start of say 1500 rpm do you build full boost in first gear?  Javad=
 I
may be way off base as the wieght of the car may still be plenty to build
boost with the low gears.  The 4kq is a lot heavier than other things I have
built in the past.
I do agree the JT flywheel certainly is a pig though.  Todd I got the same
weight when I measured the flywheel.  I got another 13 lbs for the clutch a=
nd
flywheel (on my $6 bathroom scale).  Worst of all a lot of the wieght is at
the rim.  Worst of all my crank rang up at 60 lbs.
Back on the original topic does anyone have ideas on the diameter of the pi=
n?
Luke said about 3/4" long.  I think I will just use what I have available f=
or
diameter since the sensor is just looking for a transient.  I just don't ha=
ve
any 5k parts to reference.
Thanks
Eric


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