It's been a few years now since I've taken ownership of my '70 Datsun Z.

I can't tell you how much a gear ratio change has improved the car.

I went from around a stock 3:4 to 4:10 rear gears .

The car is now ''awake'' and lives right in the best powerband/rpm situation.

I have a 5 speed from around a '78 280z . A single 2'' Jaguar SU carb with 

a Crown Maunfacturing turbo kit , period correct .

 

This car is now a real fun street car ! Do you have any single upgrades to share ? 

2.5" exhaust.

It may not run better but you'll think it does.

Edited August 4, 20159 yr by siteunseen

i just did the ZX distributor upgrade on my early 260z.  For a $100 part it made a pretty big difference in performance, especially in the higher RPM range

Lowering my 76 ~1.5" had a major affect on handling.  Much improved.

 

And a differential mount of the RTz design made the overall gear-shifting operation much more solid and pleasant.

Numbers on the doors!  

Numbers on the doors!  

I was just about to post, Stickers under the hood, but yours is better.

Lowering my 76 ~1.5" had a major affect on handling.  Much improved.

 

And a differential mount of the RTz design made the overall gear-shifting operation much more solid and pleasant.

I am having gear change issues .

Frequently at a stoplight and in neutral , I find the trans is locked and won't shift out of neutral 

into gear without a big fight. Also the third to fourth shift can be notchy unless done slowly. 

Can this diff mount help ? The car is lowered 1.5'' with koni adjustable shocks.

I am having gear change issues .

Frequently at a stoplight and in neutral , I find the trans is locked and won't shift out of neutral 

into gear without a big fight. Also the third to fourth shift can be notchy unless done slowly. 

Can this diff mount help ? The car is lowered 1.5'' with koni adjustable shocks.

That sounds more like a clutch issue.  It's not disengaging completely.  If you're lucky it just needs adjustment at the pedal.  If you're not lucky, one of the hydraulic cylinders is going bad.  Start a new thread about the problem.

 

The RTz diff mount just stops the clunking noise that can happen with a loose stock mount. 

Best mod (about $2): a potentiometer in the CTS circuit to correct the fuel/air ratio.  Engine fires right up and runs pretty well.

 

Second best mod (about $10): headlight relays.  It's NICE to have bright lights!

Wheels and Tires. Going to 15x7 Konig Rewind Wheel with a 205/60 Tire transformed the way the car handles and looks.

Edited August 5, 20159 yr by inmocean

New rubber bushings.

Major improvement in ride quality, especially for a daily driver

;0)

Sent from my SAMSUNG-SM-G890A using Tapatalk

Bigger front sway bar and poly end link kit.... like a shark finning on the surface.

Limited Slip Diff.  The best bang for your buck handling and performance modification.