[Roadsters] Differentials

[Jerry Krakauer]

I agree with Dave.  When I bought my 67.5 new, the torque curve of the Solex
cam combined with the 3.7 rear and the tall 1st gear ratio of the 5 speed
was not a good combination off the line. The first modification I made was
to install the Datsun LSD with the 4.38 ratio. It was like night and day.
Surprised a lot of guys in Detroit iron machines. Never thought the revs too
high in 5th at highway speed.  Later when I went racing I installed a
Detroit Locker with 5.62 gears. With that combination could do 1/4 mile
under 15 seconds. (Of course that included some engine mods too). If I ever
put it back on the street I'd again go with the 4.38. BTW, still have the
original complete 3.70 in storage with less than a 1000 mile on it.

Jerry Krakauer
SRL 311 00099



-----Original Message-----
From: datsun-roadsters-bounces at autox.team.net
[mailto:datsun-roadsters-bounces at autox.team.net] On Behalf Of David Patten
Sent: Friday, February 14, 2014 8:21 PM
Cc: Datsun
Subject: Re: [Roadsters] Differentials

If you really want some stump pulling acceleration find a center section
from a 521 or 620 pick-up. The L16 to L20B trucks came with 4.375 gears.

You will need to swap the side gears from your Roadster diff, but it is a
simple process.Mike Klotz posted a thread on Ratsun with video showing the
details.

Mike's Ratsun H190 Side Gear
Swap<http://community.ratsun.net/topic/10748-h190-spider-gear-swap/>


Thank you,
Dave Patten, Owner


*FutoFab, LLC*
199 Stark Hwy So
Dunbarton, NH 03046

Website - www.FutoFab.com <http://www.futofab.com/> e-mail -
dave at futofab.com Facebook - FutoFab
LLC<https://www.facebook.com/pages/FutoFab-llc/150721408419667>




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