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
> >
> >
> >
> >
>
>
>
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