George, I agree with you. The big thing you have to watch out for when
you offset grind a crank is where the oil hole for the rod ends
up. just one of the dougs
George Mitchell wrote:
>
> Wow ,
> If a machinist is trying to charge you 1000 bucks to
> offset grind a SBC crank he just does not want the
> work in my opinion.
> In my mopar (street car) I buy used fueler hemi
> cranks and offset grind the down to BB Chevy size all
> day long. When I worked in Bob Harris' Shop here in MD
> we did it countless times for customers who did not
> want to spend big money on a "real" stroker crank.
> Even the new motor for my VOLVO has an offset ground
> crank in it !( from 2300 to 2770 cc).
> Its true that a high dollar crank will give you knife
> edging ,rifle drilled throws etc ,etc, blah, blah, but
> we had a customer who offset groung a 400 M ford
> crank and put it in his 351 motor and had something
> like 415 inches fuel injection , nitrous, and no
> problems . That's not even a steel crank !! Of course
> the rod ratio sucked and he shifted it at like 5800--
> but that's what he wanted .
>
> If you have the bucks -- spend it , in a pure race
> (like here) motor its probably worth it but if you are
> willing to chance it , I would --- Normally aspirated.
>
> Just my 2 cents in Snowy DC
> George
>
> --- Keith Turk <kturk@ala.net> wrote:
> > Actually a 2.90 crank most often is a 3.00 Large Rod
> > journal crank ....
> > Offset ground to a small Journal ...... That is a
> > you start with a 2.100
> > rod journal and grind , 100 off one side so to speak
> > to create a 2.90 stroke
> > Small journal Crank....
> >
> > If you stop and think a minute about this... the
> > Crank Grinder isn't going
> > to be your average guy... he needs to make sure the
> > Crank is indexed
> > correctly and so on.... I have one and the first
> > time my Machinest saw
> > it... His comments were.... well there is more then
> > a Grand in Machine work.
> >
> > Patterson Racing is a Well Respected Competition
> > Eliminator Motor builder
> > for NHRA drag racing.... and the rules fluxuate
> > enough that some times these
> > little motors are out there reasonably Priced. I
> > talked to them the other
> > day in my search for a 280-285 stroke crank.... and
> > NEW they cost $2700 for
> > the best Patterson has to offer. Cheapest date....
> > was around $1400
> >
> > Keith
> > ----- Original Message -----
> > From: John Beckett <landspeedracer@email.msn.com>
> > To: <LGMCAFEE@aol.com>; <land-speed@autox.team.net>
> > Sent: Friday, February 18, 2000 7:40 AM
> > Subject: Re: cranks and pistons
> >
> >
> > > Larry
> > >
> > > Cranks with a stroke of 2.90" are custom made, not
> > off the shelf, so your
> > > not likly to see them in typical advertising.
> > Pistons, rods and crank will
> > > be easier to find 'off the shelf' if you use a 3"
> > stroke. Your other
> > > alternative is custom length rods.
> > >
> > > John Beckett, LSR #79
> > >
> > > ----- Original Message -----
> > > From: <LGMCAFEE@aol.com>
> > > To: <land-speed@autox.team.net>
> > > Sent: Thursday, February 17, 2000 8:40 PM
> > > Subject: cranks and pistons
> > >
> > >
> > > > Hello list. I`m looking into getting a crank
> > made with a stroke of
> > 2.90.
> > > > How is the best way to go about this for a chevy
> > small block. I haven`t
> > > seen
> > > > any cranks like this for sale in any of the
> > performance books. Do they
> > > have
> > > > to weld up your old crank and turn it down to
> > destroke? Also I called JE
> > > > piston company and they said it would be a
> > special order item. Does
> > anyone
> > > > know of a company that would have 4.030 or 4.060
> > piston to be used with
> > a
> > > 6
> > > > inch rod and a 2.90 crank. Thanks Larry McAfee
> > >
> > >
> > >
> > >
> >
> >
> >
> Do You Yahoo!?
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