AHAH!!
I remember being at a national in Dallas circa '73
and watching and listening to Swanson beat the crap
out of alot of American heavy metal. That motor was
wound TIGHT. Never before or since did I hear a
TR6 wound that tight. Still have a nice but fading color
pic of the Kastner Brophy TR6 that day.
art de armond
----- Original Message -----
From: "kas kastner" <kaskas@cox.net>
To: <FOT@autox.team.net>
Sent: Friday, August 19, 2005 8:30 AM
Subject: Re: Re:rods
>I finally have to add something here on the crankshaft business. I finally
> got a stock crank to last and last and last. I used it for the final two
> years of my contracts with BL. I used a rev limit of 7500 as the 8000
> engine
> was just too peaky and unraceable.
>
> Okay, how did this happen?
>
> I figured that the only way to fix this problem was to change the place
> where
> the harmonic fell in the rev range while racing. Normally there are three
> amplitudes where the third goes straight up off the page. The second is
> the
> toughie and falls right at the range you want to run the engine. Everyone
> know this. To change this I tried both a much lighter crank, then when
> this
> was a failure, I made a much HEAVIER crank. The crank had all the heavy
> pellets that the crank people could place into
> the counter weights, then I MADE BRASS PLATES that were attached to the
> sides
> of the counter weights. The ultimate weight was up about 10 pounds (please
> don't ask the specific cause I do not remember). The brass plates were
> very
> close to the rods in the end that clearance was plenty close. I then had
> the
> crankshaft balanced and it went for years at really high revs. We tested
> many
> hours on the dyno at over 7500 with this crank and raced it for two years.
> The harmonic was raised to way out of the range we ran the engine thus
> allowing us to keep it together. The only problem was the first harmonic
> was
> also raised right to 4000 and that was the point generally run on a pace
> lap.
> It took a bit of doing to keep out of that range.
>
> The funny part is when I sold this car to Jim Ray in Texas he mgnifluxed
> the
> crank after few races and found a hairline longitude crack in one of the
> throws and so made a lamp out of this crank and then went on to blowing up
> engines with a stocker. Had he just called me on the phone I could have
> told
> him that the little hairline crack was surface deep and had been there all
> along. Oh well.
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