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Re: TR6 engine blueprinting

To: Rob Christopher <robc@cisco.com>
Subject: Re: TR6 engine blueprinting
From: Joe Curry <spitlist@gte.net>
Date: Mon, 08 Apr 2002 20:09:48 -0700
Cc: Triumph List <triumphs@autox.team.net>
References: <3CB25C21.8B4961D0@cisco.com>
The term implies that the engine is built to the "blueprint" specifications.  
In other words, all the components are exactly as the design was drawn
up.  Manufacturing specifications for mass produced engines have built-in 
tolerances over and under the blueprint specs.  These variances will cause
the engine to perform at a level less than what it is capable of.  Therefore, 
"Blueprinting" simply enables a stock engine to perform at its greatest
potential. 

Joe

Rob Christopher wrote:
> 
> Hey everyone,
> 
> I'm looking for a definition of 'blueprinting' an engine.  In my
> understanding, it involves several things:
> 1) Ensure all pistons are the same weight
> 2) Ensure all rods are the same weights at both big and little ends
> 3) Spin the crank/flywheel/pulley and remove material until all
> vibrations are removed up to say 6k rpm
> 
> Is this an accurate description?  If I went to a machine shop and just
> asked to have the engine 'balanced' what would I get, just #3 above?
> 
> Rob in Ottawa (Still with a pile of parts that will some day become an
> engine again)

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