----- Original Message -----
From: "Richard Fox" <v4gr@rcn.com>
To: <land-speed@autox.team.net>
Sent: Thursday, June 05, 2003 09:22 PM
Subject: Re: to buy or not to buy??????
> List; I ran many times with the rods that came in my 270 GMC when it came
> out of the dump truck. I don't know how many cycles they had on them but
it
> was just as many as the roofer could squeeze out of it. I ran 17 - 21
pounds
> of boost and set my first Bonneville record with that motor. Likewise El
> Mirage. My first motor to go 200 (in Bob Daltons 'liner). Never had any
> broken GMC rod.
> Went thru a couple of 460 Ford rods but that was an oiling problum
traceable
> to the engine builder. If I ever do another I'll gring the throws to BBC
> size and use good, stock 454 rods.
> The 455 Pontiac has made a lot of passes with BME aluminum rods with no
> trama, as has the 392 with Howards rods.
> Makes me think for an unblown gas motor with decent stock rods (not '32
> Plymouth) most of the time you will be OK.
> Nothing wrong with Carillos, I have 2 sets of them. One for the Ply and
one
> for the 907 Lotus. Just never used them. I do like my Crower rods in the
> Ply. and one long set for a GMC that has many 8 second runs on it.
> Rich Fox
> > Bill:
> > I think one thing you can read between the lines in what Neil wrote is
> that
> > most of out LSR efforts stress most kinds of rods well above 60% of
yield.
> > (Super rods-- like Carillos-- may be an exception, in all but the most
> > powerful engines).
> >
> > In classes that allow enough power to be produced that engine parts
often
> > approach overstress-- rod strength is typically a key limiting factor.
> I'm
> > no expert in flatties or Arduns, but I've learned enough from you to
know
> > that the block simply won't hold tremendous horsepower-- so in that
case,
> it
> > probably doesn't take very exotic rods to avoid overstressing those
parts.
> >
> > Russ, #1226B
> >
> > p.s.: I think IT IS possible to predict the useful life of a set of rods
> > with useful accuracy, if one is willing to prioritize the time to
collect
> > the data and to do the calculations. Neil has told you exactly the
> > methodology that Reliability Engineers use-- and they make similar
> > predictions routinely, for a process called "predictive maintenance".
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