Re: GM Forged Rods on Turned 401 Cranks

[lynn peterson <kustomkemps@xxxxxxxxx>]

You can't get down on me because you haven't got a
clue. Everyone knows you have a vested interest in
your rods and pistons, so goodie for you. Actually, it
was nice of you to take your time to get some AMC
parts made, but I can do just as well or better for
the same or less money. How about a a 410 CID engine
that uses 5.85" long 2.1" journal Scat rods ($350),
455 forged Pontiac pistons, .060 over (4.21" bore,
which is only .045" over the stock bore.) with a 1.497
CH ($307). The crank is not offset ground, but is
ground dowm to the SBC journal size. Not only do you
get a lighter reciprocating mass, but there are better
rod bearings available for the SBC rods than we can
get for our AMC's. By the way, anyone who does not
think the rotatiing mass of a 390/401 is a problem,
just look at the Donahue NASCAR effort, and you will
see they could not run the factory rods and crank,
which was not competitive, and broke in any event.
With all the oiling mods and machine work, this setup,
in short block form, costs ~$1600 to build. If you
read my post you will see it was ONE OF MANY EXAMPLES.
Yes, it did cost $8,000 to build this particular
engine, but it was a 10 hour road race DRY SUMPED
enduro motor. We could have saved nearly $2,000 if we
had not had to totally re- engineer the dry sump setup
ourselves, which cost extra machine shop time.
However, I have now tired of explaining myself and
giving my information away for free. Therefore, ANYONE
who might like information on how to build stroker
motors, oiling systems, ect. send a SASE envelope
along with a $10 postal money order to:

Lynn Peterson c/o
Kustom Kemps
6122 SW 36th Ave. 
Portland, Or. 97221

If you have a request on a SPECIFIC CID or other
setup, include that information and you will receive a
customized report for your project. If you would like
a quote on an engine build by our company, that quote
is free. Just send the SASE.

regards,

LEP 
--- Nick P Alfano <nick.alfano@xxxxxxxxxx> wrote:

> We built a similar combination to this about a year
> ago and yes it is a 
> great combination but saving a ton, compared to
> what?  Please tell the 
> rest of the list what the customer had in this
> engine when they were 
> through.  This is not your typical $3000 engine
> rebuild folks.  You are 
> looking at anywhere from $7000-10,000.  You don't
> build an engine like 
> this cheap.  If you do, it will break!  This is a
> long stroke, big bore 
> engine that requires a lot of work to make it work
> right.  Not getting 
> down on you, but saving money was the whole premise
> behind the post.  The 
> only thing you might have saved a dollar or two on
> where the rods and that 
> is only because you wanted a 6" rod for the project.
>  Every thing else was 
> increased in price to do this.  Also, consider the
> bore size, 4.280 is 
> .115 over bore.  How many blocks out there can go
> this big without filling 
> the water jackets with cement. 
> 
> Nick Alfano
> 
> 
> 
> Message-ID:
> <20050129232545.76397.qmail@xxxxxxxxxxxxxxxxxxxxxxx>
> Date: Sat, 29 Jan 2005 15:25:45 -0800 (PST)
> From: lynn peterson <kustomkemps@xxxxxxxxx>
> Subject: Re: GM Forged Rods on Turned 401 Cranks
> To: mail@xxxxxxxxxxxx
> 
> Not only do you save a pile of money, you reduce the
> bearing speed, reduce reciprocating weight, and
> increase the stroke all at one time. Just takes a
> little math work to figure it all out. For example,
> a
> 401 crank cut to a 2" SCB small journal size will
> offset grind to ~3.92, somewhat less if it has been
> previously ground. With a 4.28 overbore, custom
> pistons with a CH of 1.123", and 6" rods, a 451CID
> engine results. We have built several of thses with
> great success. Of course, there are many other
> possible combinations. 
> 
> regards,
> 
> L. Peterson, 
> 
> president, Kustom Kemps. Portland, Or
> 
> 
> 
> 



		
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