Z Car Garage is proud to bring this record-setting 1970 Datsun 240Z Bonneville Salt Flat car back to life for our client Randy Jaffe. In 1976, a team of Nissan employees set out to break the land speed record for the stock body F/GT class. They built this Z in their spare time, setting a new record at Bonneville of 166.037 mph which stood for almost a decade. A monumental achievement considering they had no factory parts support.

 

Join us as we revive this historically-significant Z from its slumber with chassis and engine work. We will also look at the story behind the Salt Flat program, with an exclusive account from Bonneville crew member and former Nissan Parts Manager Tom O’Connor.

History and Acquisition

 

This Datsun 240z set the F/GT class record of 166.037 mph at Bonneville with Nissan USA field engineer Bob Stockman behind the wheel. The old record of 153 mph was held by a Mercedes 300SL. Datsun actually set several records at Bonneville prior to ’76, starting in 1974 with a B-210 Hatchback (121.8mph, driver Mike Jones) and twice in 1975 with a 280Z 2+2 (164.3 mph, driver Milan Micka) and 164.6 mph with Nissan Competition Department head Tom O’Connor.

 

A team of six Nissan USA employees, working in the Nissan Technical Center, Competition Department and Service Departments built the F/GT 240Z. From left to right: Frank Honsowitz, Matt Bornyasz, Milan Micka, Tom O’Connor, Bob Whitehead and Bob Stockman. O’Connor was responsible for building the engine, Micka worked on the suspension and created the paint scheme and graphics. Bob Whitehead, National Service Manager, was the man who originated the Bonneville idea at Nissan USA in 1974. Check out the period, Nissan Employee Newsletter chronicling the Bonneville efforts (PDF) by clicking on this link.

 

Bonneville-As Remembered by Tom O’Connor

How did they do it? We reached out to Bonneville crew member and driver Tom O’Connor to gain insight. The team volunteered time after-hours to build the cars and successfully run them. Tom was a Nissan Parts Manager and also built all of the Bonneville racing engines…their success depended on his skills/knowledge and we thank Tom for this exclusive, first-hand account of the F/GT record-setting effort.

 

Bonneville 1974, 1975, 1976 – As remembered by Tom O’Connor

“The story of the record breaking 240Z in the F/GT class at Bonneville in 1976 really began in 1974. Bob Whitehead the VP of the Technical Engineering and Service Support, a hot rodder and Bonneville fan, approached the employees in his department with the idea of running a Datsun B210 at Bonneville. Several of the employees including myself were currently SCCA club racers and we were all ecstatic about building and racing cars without having to spend our own money. We would have to work on the project after hours but the Datsun Technical Center facility was at our disposal and somehow Bob hid our expenses in his budget. The B210 went 121.8 MPH capturing the I Production class record.”

 

“After this first trip to Bonneville the team realized that it was harder to go fast at Bonneville than we thought. It’s over four thousand feet elevation, the salt and skinny Bonneville tires makes it difficult to get traction, and you only have two miles to get up to speed before entering the timed third mile. If you can go over 200 MPH on the three mile “short course” you can then use the five mile course for your record run. After considering all of this and looking at what classes the Datsun cars could fit into, we came up with the ambitious plan to return the following year with a 280Z 2+2 that was allowed to run as a production car, not a GT car. The plan was to build two different engines, one that would fit into the G Production class and one that would fit into the F Production class. What made this plan so ambitious was that to make a record run you must qualify one day by running the course in one direction and break the existing record for the class. You then come back the next morning to make the official record breaking attempt. This time you run in both directions, the two runs are averaged thus eliminating any advantage or disadvantage a wind would give a one way run.”

 

“Our problem was the number of days available to make two record attempts. Luck was on our side and the weather was perfect, the car passed technical inspection and we went to work changing the engine so we could be back the following day to make our qualifying run for the second record attempt. I was fortunate enough to be the driver for the F Production record. The car was so stable and you are so far from any objects that the sensation of speed is not there, but I became a big believer in aerodynamics when I turned off the engine at 165 MPH and the car slows to 90 MPH in what seems like a second. I really realized how much power it takes to push the air. The 280Z 2+2 broke both the F and G Production records. 164.6 and 164.3 MPH”

 

As soon as they came home, the team started looking at what they would do in 1976. They realized the 240Z that Datsun had loaned to famous cam grinder Racer Brown in 1972 to break the F/GT class record was sitting in a warehouse. The red paint can still be seen under the current livery.

 

Tom recalls preparing the 1970 “Racer Brown” Z for the F/GT class:

“The engine we had built for the G Production class was also the correct displacement for the F/GT class. We installed a “G” nose, added a few tricks we had learned, put the distinctive stars paint job on the car and went back to Bonneville to claim our fourth record in three years. It was great fun and really showcased how much talent was in the Datsun Technical Center in the mid seventies. Some evenings we could have as many as ten guys working on different systems that required their particular talent. I think that it is telling that three of us on the team went on to careers in motorsports. Frank Honsowetz would became the Nissan Motorsports Manager, Max Jones would spend much of his career at Rousch Racing and then become the Competition Director at Ganassi Racing and yours truly would finish out his career as a Competition Manager at TRD. Bob Whitehead would move on to Subaru where he used the same model of using enthusiast employees to build cars that broke records. It was also great, back in the day, to have many old Bonneville racers be so open and generous with their encouragement and suggestions to a group of 20 year olds entering their world.”

Out of the numerous trophies that Tom and the Bonneville team of Nissan employees earned, this one stands out:

“Alvin, this is it!! The trophy from ’76 hung in my shop for years, I don’t even remember how I ended up with it. The plaque was given to each member of the team by Mr. Katayama. I have given these to Randy so they will stay with the car.”

 

“Of course my immediate plans were to get the car mechanically sound with a new race motor and aesthetically get the car as good as it can be! Not until I got the Z back to my shop did I realize after scrutinizing old photos with placed decals on the car that this was same Z raced at Bonneville by the famous cam grinder RACER BROWN out of Virginia where he set the record of 152+ MPH in an orange paint scheme that was still visible in certain places all of the car. I understand at one point the car was ordered to be crushed by Nissan but the Nissan Parts and Competition Team somehow skirted that issue, added the G-Nose, painted the car and put it back on the Flats in 1976 with the record that held up for 9 years.”

 

Z Car Garage Revival

 

Randy shipped the Z from Georgia to our shop in San Jose, CA where we were tasked with bringing it back from its 44-year slumber. We admired the many details throughout the car, all designed and implemented by that famed team of six Nissan employees. This is probably the lowest mileage (not sold to the public) S30 in existence with about 2300 miles on the chassis. Immediately we noticed how preserved and rust-free the chassis and bodywork was for being a Salt Flat racer.

 

As you may recall, the standard front nose was run in Racer Brown trim: The F/GT team added this prominent “Grande Nose” for improved high-speed aerodynamics:

 

The “G-nose” was a factory-made, 5-piece kit made for the JDM-only Fairlady ZG (HS30-H). Created for Group 4 racing, it became a dealer option so it was common to see the G-nose on JDM and export market S30s. Check out the stock ducting:

 

One might expect a full roll cage for a Z car destined to run 166mph…here the stripped interior houses a simple roll bar with integrated headrest. It gets better as the steering wheel and seats are straight from the uber-rare Fairlady Z432R (shown as reference below)!

 

Keen observers may note that the steering wheel is an “Ura Mach” unit. This leather/aluminum steering wheel was an available option to all S30s from Nissan sports/race, with the stock wheel being wood composite made by Izumi. Though available as optional parts, these seats and steering wheel were removed from a 432R and installed on the F/GT car as delivered from Japan by Nissan!

 

Chassis

With respect to the ultra-low mileage of this chassis and provenance we performed a “sympathetic” refresh to make it road-worthy. The entire suspension was removed and powdercoated, with all hardware re-plated. Before/after shots below with more in the gallery.

 

 

We rebuilt and replaced all factory brake components including new calipers, rear drums/shoes+wheel cylinders, new wheel bearings front and rear:

 

New drum brake components:

 

Freshly powdercoated suspension and undercoated chassis:

 

New tie-rods, rack bushings an engine mounts:

 

The tubes inside the original wheel/tire setup were replaced. We built another set of wheels with Vredstein Classic tires in stock size with Mooneyes covers for display.

 

Engine

 

Randy wanted to proudly display this historic vehicle in his collection, but more importantly (also why we love him), he wanted to drive it so people can see and hear the F/GT in action. The stock L24 wasn’t going to cut it, this Z was getting the Jaffe-treatment with a famous engine to give it some go…

 “John Caldwell had just built us a back up race motor for the 46 Z and it was on an engine stand in my shop so I decided that would go in the Salt Flats Z. The original record setting motor was prepared by Tom O’Connor and his team at Nissan but was long gone. The original 1976 raced motor and the Caldwell motor both L28’s were built almost identical with 44mm Mikunis and very high compression so it would be back similar to its 1976 build. A motor was in the car when I got it but it was a 1973 L24 with flat top carbs and it was not plumbed up – just sitting in the engine bay. There was no question that the car would go immediately to Z Car Garage to receive its heart transplant along with an overall inspection to get the Z road worthy and running strong! Rob went thru the brakes, hydraulics and made sure the car was prepared to drive as if it was going back to Bonneville.”

 

We installed the Caldwell-built backup engine that was prepared for the BRE 240Z from The Mitty. Randy purchased a set of ph44 Mikuni’s from ZCG complete with Harada intake, velocity stacks, linkages and Z Car Garage Heat Shield. We tried to replicate as much as we could in the engine bay from period photos and history told by previous team members:

 

More drivetrain goodies. The exhaust system includes a ceramic-coated header and side/rear exit all painted white. The engine is backed by a low mileage 280zx close-ratio 5-speed from Rob’s stash of parts with a JWT aluminum flywheel ad HD clutch.  Power is sent through an R180 with 4.11 gearset complete with new bearings and hardware:

 

New radiator hoses and cooling system refurbished. Notice the large hole in the driver’s side radiator support? This chassis was fitted with a Nissan race carb inlet ducting kit! The fuel system got some love as well with all new lines and refurbished fuel tank. More detailed photos in the gallery:

 

The fuel pump assembly was updated while remaining faithful to original system. Before/After:

 

We hid the hid the MSD box by building a bracket and running the wiring into the engine bay. Inside the cabin we cleaned up gauges and made everything functional:

 

A Museum Piece that Moves!

 

How does the reborn F/GT Salts Flat Z sound and feel to drive!? Randy loves it:

“With a 13.5+ compression L28 race motor and straight pipes – well it’s music to a motorsports guy. The car has such little mileage and had several tricks added by the Nissan team that it drives amazing and is a total visceral experience!”

Photographer and ZCG client Larry Chen visited us and did an in-depth look at the Z on Hoonigan Autofocus. We made this video below complete with a dyno run, driving on the street and a few clips to give you an idea of the Salt Flat Z experience, enjoy!

 

We asked F/GT team member Tom O’Connor what power the Z made to achieve 160mph+ at Bonneville:

“I don’t remember exactly but it was a little over 300. Frank Honsowetz and I have discussed it and he can’t remember either, but 300 was our goal and I remember we beat it. We also can’t remember what diff ratio we used but I remember spending a lot of time with the gear ratio/tire size speed calculators.”

Rob dyno-tuned the Caldwell-built BRE motor, making 254hp/212tq to the wheels, not far off from the 300hp mark of ’76 while making all the right noises! Don’t forget to watch the dyno run in the video above!

 

Salt Flat Z wins at Amelia Concours!

 

Z Car Garage finished reviving the F/GT Salt Flats car and shipped it back to Randy in Georgia, just in time for the Amelia Island Concours. This event, like many Concours gatherings are heavy on Euro/US entries with little Japanese classic representation. Randy mentioned the Z to the guys at Amelia and they accepted it!

“After that first call to Rob I tracked down Tom O’conner in the LA area and he was thrilled to know that the car may run again and was kind enough to take the winning plaques off of his garage wall that were there since 1976 and shipped them to me! I then was talking to guys at Amelia about the Z and they said immediately – we want the car on the grass in 2021. The event is usually in early March but was pushed out until early May because of the Covid restrictions. Tom O’conner and I spoke several times and he said he would like to attend the Concours with his wife Sharon. This was huge to me to reunite the team leader back in the day with this car!”

 

Indeed, it was great to see Tom reunited with the record-breaking Z he was part of.

 

Rob Fuller was also present, meeting several iconic racing legends like Trevor Harris and Peter Brock. Icing on the cake…Randy Jaffe won two awards!

 

What a sight to see (and hear) the Z on the grass of the Concours. Here is a video showing it in action and revving up to accept the award. Randy also talks a bit about the Z:

 

Thank You!

ZCG thanks Randy for his unwavering support. We love your passion Randy and how you wave the flag for Nissan/Datsun history. The Salt Flat Z is in great hands for the next generation to appreciate. Stay tuned readers as we feature another cool Z from Randy’s collection on zcarblog. LONG LIVE THE Z!