Roman C came to Z Car Garage earlier this year to have his 2008 Nissan 350z inspected. After going over the car he expressed his goals and one was full suspension upgrades. We installed KW V3 coil-overs and replaced bushings throughout with Whiteline parts. ZCG has performed many KW suspension installs and we really like how they work, using them exclusively on the 300zx(z32) and 350z models.
OEM vs KW coil-overs front and rear:
Whenever we do a coil-over installation and lower the ride height we always use the SPC front and rear camber arms. This ensures that a customer gets the desired ride height, handling and tire wear:
Stock vs SPC upper control arms, with a full alignment following installation:
OEM sway bars were replaced with our favorite units from sway bars from Hotchkis:
OEM vs Hotchkis front and rear:
A common upgrade/maintenance item we routinely perform is differential bushing replacement. Here, again we use Whiteline bushings:
Roman had a few bolt-ons like intake and exhaust so we UPREV tuned. Peak numbers of 304hp/260tq to the wheels was achieved but more importantly the power gains are seen throughout the rev range:
Roman was super stoked with the results. We took care of a few maintenance items like replacing a drive belt and peforming a coolant flush. Finally, he had he bought some new wheels/tires so we mounted and balanced them for him.
This 1972 Nissan 240Z-L however is “the list” car for Glenn that started his Datsun passion. Glenn has owned it for several years, enjoying it as a back-road burner on the street and rallye events.
Find out more about the story behind this right-hand-drive survivor over on Petrolicious and also watch this great video:
We’ve known Glenn for many years and we actually tuned his Fairlady back in 2012. The 3L stroker produced one of the highest dyno numbers we had seen!
Big Brakes for Glenn’s S30
The Z clearly had more than enough power, but braking was always something Glenn wanted to improve and once he heard about our latest Big-Brake Kit for small wheels he became a believer after test driving them. Rather than tell you how we feel about this product, let’s hear Glenn’s experience.
Throughout my years of Z car ownership, I have run a variety of brake setups. My Z cars have seen everything from restored OEM Sumitomos, Toyota 4×4’s, trick Wilwood setups, even frankenstein’d Baer calipers. There is no doubt that it has been one area that I have never been completely satisfied with. Over time, after many years and attempts to find the ‘perfect’ setup, I had given up and just settled for what I had.
The most important aspect to me when it comes to braking on a street driven car is feel. Yes, stopping power is extremely important, but also is not that difficult to achieve on an early Z car that is naturally light to begin with. Feel, however, is something that has always managed to escape me. On my vintage 240z race car, we use multiple master cylinders, swap them in and out, fiddle with our brake proportioning valves, fine tuning them to fit our driving style and preference. We are trying to find that “racer’s edge.” In all honesty, when it comes to a street car, I want nothing to do with all that.
Wheel sizing and style was also extremely important to me. I love old school wheels and the sizes they came in. I needed a brake caliper that would fit under my 15” Watanabe RS wheels without having to shave or drastically modify my setup. If it was not for being in love with these wheels, I would have opted for Z Car Garage’s larger big brake kit.
A few words about our latest big-brake kit solution. Our successful, larger ZCG BBK utilizes 328mm rotors and 4-piston calipers requiring a 16″ or 17″ wheel. This kit was made with our friends Tyler and Eric from Stoptech over ten years ago. Recently our customers asked us to make a BBK for smaller wheels so even a guy running 14″ vintage 5-slots slots could brake like a modern sports car. Typical big-brake kits use a 4-piston setup up front and a ZX in back; Proportioning is hard to get right, varying from car to car. We wanted a brake system that suited the car and totally bolted in, no M/C change, no proportioning valve, no booster change.
Working with Stoptech again, we developed this smaller BBK as a direct bolt-in solution for the 1970 to 1978 S30 Z cars. We’ve been with Stoptech since the beginning and love their products. We aim to release this product to the masses once our local installs are completed. Let’s get back to Glenn and hear his initial impressions of the big-brake kit:
Rob informed me he was working up a solution and he wanted me to be test the brake kit. Rob promised three things – they would brake amazing, they would fit under my 15” Watanabes, and they would feel as if they belonged on the car. Did I doubt it at first? Sure, a little. However, I also knew that the fit and finish of all products that came out of ZCG were top notch, and that Rob thoroughly tested all his products against his own standards. Which I’m sure everyone knows, are extremely high.
In preparation for the Monterey Historics last year, I had brought the Z race car to the shop for dyno time. Rob gave me the keys to his Butters Z and said “Go drive it.” Under 14″ wheels sat his brand new ZCG brake kit. I gladly accepted and took the car for a ride.
WOW, what a difference. The feel, modulation, power, sharpness was amazing. Hands down the best brakes I had ever driven on a Z car, and these were on a car with stock suspension, tires and probably cruddy tires! I told Rob, “sign me up!”
Glenn wanted to run the brake kit on his Fairlady and we happily obliged. He had also been gearing up for a road rallye so the braking system would be throughly used. You can see his Z (top left) along with his buddy Erich C’s S30 (top right, also getting a ZCG BBK!):
Then came the day Rob called me up and said they were ready to rock and roll. Lucky for me, I was just about to head out on the 1000-mile Coastal Range Rally! The kit came with beautifully anodized front and rear calipers, hats, rotors, brakes lines, reversible brackets (for early and later Z offsets), and a factory ⅞” master cylinder. Read that again… Yes, a proportioning valve was left out from that list! The brakes were a straight bolt on and ZCG did all the math to get both the master cylinder size and piston sizes correct. We brought the car in for install and within a day the car was ready to rock.
Glenn’s 240z now had 4-wheel disc brakes ready to tackle the street and rallye:
And of course, the brakes fit beautifully under the 15″ Watts. Kane approved, and Glenn was stoked:
I could hardly wait to jump in the seat of the car and take it for a spin. The brakes were now on a car with suspension, tire, power, and a proper alignment. It was everything I had remembered from driving the Butters Z and MORE. The brakes performed flawlessly on the Coastal Range Rally, taking abuse from California’s most challenging roads:
Attention to detail goes a long way. This is exactly what these brakes delivered, and what continues to be delivered by ZCG.
LONG LIVE THE Z!
We are happy to report that Glenn is still braking late and still braking deep all while Enjoy The Ride! You can find him carving through the Santa Cruz Mountains:
Big thanks to Glenn for letting us work on your Fairlady! We also thank Eric and Tyler from Stoptech for supporting us and our precious Z cars!
Kyle B visited Z Car Garage in last summer when he purchased a Concept Z Performance Akebono big-brake kit from us. The kit included red calipers, Stoptech slotted rotors, Stainless lines and our favorite 309 pads:
We installed the brake kit on Kyle’s 2008 350z:
Stock vs Akebono:
Rear calipers, and they look fantastic behind the Enkei GTC01-RR wheels:
Since this is a base model Z33 it had an open diff. We installed a Quaife LSD assembly and while the diff was being prepped we installed Whiteline diff bushings, a common practice for ZCG:
After the summer Kyle said he would be back for more and his next visit was in January of this year. We had talked about doing KW V1 coil-overs, and eventually upgraded to V3s. ZCG has performed many KW suspension installs and we really like how they work, using them exclusively on the 300zx(z32) and 350z models. Whenever we do a coil-over and lower the ride height we always use the SPC front and rear camber arms. This ensures that a customer gets the ride height, handling and tire wear:
It was time for a clutch upgrade and we installed the JWT HD/clutch and aluminum flywheel. We also replaced the clutch master cylinder, using the CMAK upgrade from ZSpeed to delete the internal slave cylinder:
Finally, we installed some ART pipes so tuning will be the next step for Kyle.
Z Car Garage is proud to offer a CV axle conversion kit for your Datsun S30 and 510. For years we have used aftermarket CV axles that utilize an aluminum adapter prone to loosening up over time. Despite efforts to keep things tight (Loctite, hardware changes) we had to keep an eye on them. We developed a better solution that eliminates the need for aluminum adapters and remains 100% bolt-in like a factory half-shaft.
Designed and manufactured locally with KAD Models, the ZCG CV axle kit works in both R180 and R200 configurations.
These are the beefiest CV axles on the market. They have been tested on the track by our vintage racing customers and also in high hp* street cars (powershifting, clutch dumps, etc.). Each axle has a serial # for peace of mind:
The CV axle kit is available now from ZCG for 1595.00 + freight and they come with everything you need to install on your car. Contact us at 408-452-0350 or send Rob an e-mail rob@zcargarage.com to purchase. Installation is just like doing a half-shaft: there is even a marking that shows you where to line up bolts and special hardware:
The ZCG CV Axles in action
The video below demonstrates the “looseness” associated with aftermarket CV axles that use adapters compared to the ZCG axles without adapters. Several customer race/street cars running our CV axles are also shown. Enjoy!
S30 and 510s running the ZCG CV axles
Randy Jaffe’s #46 BRE Datsun 240z received the very first set of ZCG CV axles: Serial # S30-000240!
Race car driver and restoration specialist Jim Froula of Racecraft is running ZCG axles in several of his cars:
Set #246 – installed May 2018 on the “Harry Stewart #52” Datsun 510:
Set #247 – installed April 2018 on the 260z
Set #248 – will be installed on Adam Carolla’s “Greg Sorrentino #90” Datsun 510. We are pleased to report that Jim will also be installing a set on his “George Alderman #32” 300ZX! The ZCG CV axles are also perfect for high hp street cars. The following customer cars are all running our CV axles now:
Frank B’s fuel-injected, 6-speed stroker L-series:
Gary’s 430whp LS3-powered 280z:
Scott W’s EFI stroker L-series:
James S’ L28ET:
Finally, Gary’s “Behemoth” OS Giken TC24B1Z powered S30:
Technical Information:
The Z Car Garage axles were designed to help remove much of the backlash aka clunk seen in many older vehicles. Modern technology has given us the ability to create a set of axles to exacting standards. We started with a high quality set of CV joints that were found to be the most consistent in both major and minor spline diameters. We then began to design the axle itself to share the same tight tolerances. We are holding a +/- .01mm diametric tolerance on both the inner and outer spline diameters. This gives us the feeling of direct connection between differential and wheel. The axle shaft major diameter was increased to 28MM to give owners a bit of added comfort in knowing the main shafts are stout. Once the axles are splined they are then heat treated to obtain the desired harness. After heat treat the axles are then nickel plated to add corrosion resistance. The inner and outer flanges are made from 316 stainless steel and mate to the CV joints with tapered alignment surfaces to ensure concentricity is maintained throughout the axle thus reducing vibration. The inner flange attaches to the stock R series differential utilizing the Nissan factory hardware. The outer flange attaches to the driven stub with bolts specifically designed and manufactured for the Z Car Garage axle installation kit. These bolts are manufactured to grade 8. All ZCG axles are manufactured locally which helps us maintain the fitment and quality we require.
Materials
Axles : Hardened AISI/SAE 4340 Alloy Steel, 4340 is a nickel-chromium-molybdenum alloy steel
Drive flanges: 316 stainless steel, Type 316 steel is an austenitic chromium-nickel stainless steel
Outer Flange Bolts: Hardened 4140 Alloy Steel , AISI or SAE 4130 grade is a low-alloy steel containing chromium and molybdenum as strengthening agents
Maximus Y is from the valley and spent the day in San Jose with his wife while ZCG we tuned his 2014 370z. Max supplied the Power Package from Z1 Motorsports, consisting of test pipes, tubular exhaust headers and a modified upper intake manifold:
Since we had not installed these parts from Z1 before, we dyno tested them followed by UPREV tuning.
First, we installed the Z1 upper intake manifold:
Baseline before installation of the Power Package was 297hp/248tq at the wheels. The Z1 intake added ~5hp/6tq:
Next, the exhaust parts were installed. OEM vs Z1 exhaust headers:
OEM vs Z1 test pipes:
From the Z1 intake to headers/test pipes we saw gains of 20hp/13tq to the wheels. The dyno reveals significant mid to high rpm improvement:
Finally, Rob UPREV tuned for even more gains of 10hp making a total of 322hp/256tq to the wheels. An improvement over baseline of 30hp/14tq at the wheels:
We chatted with Max and with 27k miles on the odometer he will be visiting ZCG again to supercharge his Z! Stay tuned!
