[Land-speed] dumb Question # 4856 - Wrist pins

[Justin Calkins]

mayf,
My guess would be availability of parts for GM engines.  Lower end parts for
the early style hemi offers a Chevy rod option, big block I believe.
Everyone make SBC and BBC parts, so the cost to make those parts are much
lower than other makes.  That's my two cents...

Justin Calkins
Cam Spray - Service Department
520 Brooks Road
Iowa Falls, Iowa 50126
800-648-5011  Ext 1232
calkins at camspray.com
http://www.camspray.com


-----Original Message-----
From: land-speed-bounces at autox.team.net
[mailto:land-speed-bounces at autox.team.net]On Behalf Of Larry Mayfield
Sent: Wednesday, November 23, 2011 11:35 AM
To: land-speed at autox.team.net
Subject: [Land-speed] dumb Question # 4856 - Wrist pins


Ford uses a wrist pin diameter of 0.912 inches for the little end of the
rod/piston.  GM has a wrist pin diameter of 0.927 inches. I see a number
of  Ford products whether pistons or  rods offered with the option of
using the GM wrist pin diameter.  I don't know if the Ford pin diameter
is offered as an option for GM stuff though. Don't care, lol...

What's up with that?  Is the GM pin lighter even though it is larger in
diameter? Stronger for sure but is that the reason?

So, the dumb question is:  "why switch from 0.912 to 0.927 inch diameter
wrist pins?

Keep it technical please...

mayf

--
______________________________
drmayf
Worlds Fastest Sunbeam, period.
204.913 mph flying mile
210.779 mph exit speed
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