GM Forged Rods on Turned 401 Cranks

["Nick P Alfano" <nick.alfano@xxxxxxxxxx>]

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