I agree I think mine was less the 60 bucks to shorten and balance ,nice
paint too rob>> Is tewenty K alot? thats barley a match book cover
----- Original Message -----
From: "Bill Babcock" <BillB@bnj.com>
To: <BillDentin@aol.com>; <Kaskas@earthlink.net>
Cc: <fot@autox.team.net>
Sent: Monday, February 04, 2002 6:37 PM
Subject: RE: tolerable DRIVE SHAFT run out?
> There are lots of driveshaft shops that will check and dynamically balance
> your driveshaft.
> I've had several made from bits and pieces. When the pros finish with them
> they are pretty, straight, and perfectly balanced. Don't even mess with
> measurements, it's cheap to get it done.
>
>
> By the way, unless you have true overdrive, I doubt your driveshaft is
> getting to 13K.
>
> In my humble experience, high end miss is usually caused by the familiar
> old bugaboos--fuel or spark, most likely spark. Even if it doesn't happen
> in the lower gears. High gear, high RPM is the highest load your engine
> sees, which means highest combustion chamber pressure and highest voltage
> required for the spark. It's also frequently caused by too lean a
> mixture--same root cause. I'd try closing the plug gap to .010" and see if
> that has any effect. If it does, it's your sparks--and it doesn't matter
> what kind of system you have, you can have something truly bodacious and a
> weak coil at high RPM will let you down.
>
> The second thing to try is going up big on the main jet. I don't know
> whether you have SUs or Webers. If it's webers, go up four or five steps,
> and see what happens. It won't be optimal, but it'll tell you what's going
> on.
>
>
> -----Original Message-----
> From: BillDentin@aol.com [mailto:BillDentin@aol.com]
> Sent: Monday, February 04, 2002 3:15 PM
> To: Kaskas@earthlink.net
> Cc: fot@autox.team.net
> Subject: tolerable DRIVE SHAFT run out?
>
>
> Hi Kas:
>
> Hope you are well!
>
> We are still working on 'high end break up', and John Reimer, a very
> successful local ROAD/ROUNDY ROUND/DRAG racer friend (from the old days)
> something to the effect of, "If you don't have similar symptoms in other
> gears (at top RPMs)", he would be looking at something spinning that is
> out
> of round, and at top speed perhaps we have past the tolerable limits. He
> said he would look first at the drive shaft. the Thunder Bolt has a one
> off
> drive shaft. Using less than laboratory equipment in our own shop, we
> suspect we have 20,000ths out of round at one end. Is that too much when
> we
> get to 13,000 rpms (read 6,500 actual)? Any idea what tolerable limits
> might be?
>
> Appreciate any thoughts.
>
> Bill Dentinger
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