[Roadsters] 2350 stroker (was "Best bucket seats for a roadster?")

[Keith0alan at aol.com]

One of the biggest changes with most everything is that technology used to  
be very expensive and labor very cheap. Now technology is very cheap and 
labor  very expensive. Welding cranks used to be very common. Now the labor 
involved  exceeds the cost of a new crank. The whole CNC thing has made one 
off parts much  more reasonable. I find the whole "billet" parts thing 
amusing. For a lot of  things a cast or forged part is a better choice. However, 
throwing a block of  metal on the CNC machine, pushing the button, and going 
home for the night is  much cheaper that all the labor involved in a casting 
or forging. 
 
keith
 
 
In a message dated 8/8/2012 9:01:07 A.M. Pacific Daylight Time,  
nolan at mortarsprayer.com writes:

Good  morning Keith and Tim.

Yes it is kind of funny that a few decades of  technology have passed.  I
feel like an old timer talking about back  in the day..    J

Now it is probably easier to design what  you want in AutoCad and send out
the drawing to a crank  manufacturer.



I know that Vern built several stroker cranks for  roadsters. It was a long
process but the only reasonable way to get more  stroke out of a U20.  In 
the
L series there were easier choices like  fitting a NapZ 2.4 crank into a 2
liter block.



After the  dimensions were set, the cranks would be cleaned then welded. The
welding  was a slow and carful process that minimized warping. Then there
were many  steps of measuring, cross drilling the oil holes, grinding,
polishing, shot  peening and hardening with a nitriding process. I'm sure I
have forgotten  steps. It was a long project.



As I look back, I am very  thankful to have had a little time as the shop 
boy
in Vern's shop.  I  can still remember watching him machining parts on the
lathe that he built  himself. One cool feature of the lathe was that it had 
a
syncro 4 speed  transmission.  I can close my eyes and see the grin on his 
as
he was  power-shifting the lathe. 



All my  best,

Nolan



From: Keith0alan at aol.com  [mailto:Keith0alan at aol.com] 
Sent: Wednesday, August 08, 2012 6:24  AM
To: tputland at charter.net; nolan at mortarsprayer.com
Cc:  datsun-roadsters at autox.team.net
Subject: Re: [Roadsters] 2350 stroker (was  "Best bucket seats for a
roadster?")



At one time it was not  uncommon to take a stock crank, weld up one side of
the journal, regrind  them offset and increase the stroke. I haven't heard 
of
anyone doing this  in years. 



keith



In a message dated 8/8/2012  4:34:24 A.M. Pacific Daylight Time,
tputland at charter.net writes:

You  stroked a U20? What crank did you  use?
tim
________________________________________

datsun-roadsters at autox.team.net

Donate:  http://www.team.net/donate.html
Archive:  http://www.team.net/archive
Forums:  http://www.team.net/forums
Unsubscribe:  
http://autox.team.net/mailman/options/datsun-roadsters/keith0alan@aol.com