Shop Talk for
|
|||
 |
|
||
Hagerty recently produced a video featuring local Bay Area Datsun owners Courtney and Dustin Frisk. The couple got married last year and Z Car Garage prepared Courtney’s 240z in time for their special day. Check out the video below and find out more about their love for Datsuns in Hagerty’s article HERE.
Learn more about ZCG’s work on Courtney’s 240z HERE. Enjoy The Ride, you two!
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 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!
Randy Jaffe’s #46 BRE Datsun 240z received the very first set of ZCG CV axles: Serial # S30-000240!
The Bluebird SSS Coupe and Hakosuka Skyline are both running ZCG CV axles on the race track:
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:
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
Rob drove his Datsun 510:
Lou drove his 1970 Series 1 240z:
Ty and Christine also joined us in their 991 Porsche:
Naveed has a cool collection of sports cars including an Nissan R32 Skyline and recently acquired this Fairlady Z:
We stopped at a vista point just after the 9/35 junction and headed to Alice’s:
From Alice’s we drove down 84 and to the coast via Pescadero Rd. Though foggy it was quite warm and we had fun staging the cars for photos.
Naveed’s RHD S30 sported a triple-Mikuni carb’d L20A with a full Fujitsubo exhaust. Stay tuned as we report on the dyno performance of the Fujitsubo exhaust system on our shop S30:
Naveed’s Z sounded wonderful echoing off the forest-lined roads. Listen to the exhaust and watch a short sample of the fun run in the video below.
We had a blast, thanks for inviting us Naveed!
Enjoy more pictures from Naveed and us in the gallery below:
Each year the Historic Sportscar Racing association (HSR) organizes the largest and oldest event for Historic race cars on the East Coast. It’s called the Classic Motorsports Mitty and it took place at Road Atlanta, GA from April 27-29. We attended The Mitty to provide race support for Randy Jaffe’s #46 BRE Datsun 240z (driven by our hero John Morton) and Alex McDowell’s Datsun Bluebird Coupe and Hakosuka Skyline.
Nissan was the featured marque for the first time with John Morton serving as Grand Marshall so naturally every Datsun-fan was drawn to The Mitty. I took a Thursday night red-eye flight from San Jose with part of the ZCG crew and when we arrived at Road Atlanta our paddock was an absolute feast for the senses. Nestled primely across from the front-straight footbridge, we had an impressive display of West-Coast racers, from L to R: The BRE Datsun 240z, BRE 370z, Comedian Adam Carolla’s #44 Frank Monise Datsun 2000 Roadster and Bob Sharp 610, Alex’s Hakosuka Skyline and Bluebird Coupe, the Friselle GTU 240z, Dave Stone’s Frellsen B-sedan 510, Jim Froula’s (Racecraft) Datsun 260z, our friend Glenn Chiou’s VIPS/Loren St. Lawrence 240z and Bob Clucas’ IMSA GTU 240Z.
At 76 years of age John Morton is still formidable behind the wheel. Here he is piloting the #46 BRE 240z that we prepared around Road Atlanta; the very same track where he won the 1970 and 1971 National C-Production Championships!
The sweet smell of race fuel, frantic adjustments, checklists, and engines blaring to warm-up for the next session all reminded us how much we love racing! From the on-board video above, you can see the BRE 240z performed well with John Morton at the wheel but what it does not show viewers is the not-so-glamourous side of racing: part failures. The Z ran great in Thursday’s practice but when we arrived at the track Friday morning, Rob told us the engine failed during the first session. He needed all hands on deck. What followed absolutely humbled me; the ZCG crew went to work in a supreme effort to get the #46 BRE 240z alive again for Saturday/Sunday’s races.
To get a first-hand perspective of the Z’s revival I asked ZCG Lead Technician, Josh Corwin, to give us the play-by-play of the heart transplant. Please read on to see a video chronicling the events!
1) How, when and why did the engine fail?
It is still too early to know exactly what went wrong with the engine. A complete teardown will be performed to isolate the root cause. I can tell you that during Friday practice, John Morton was accelerating up Road Atlanta’s back straight coming up the hill before turn 10, in top gear at wide open throttle well over 100mph. That is when a major engine component let go resulting in multiple holes being punched through the engine block, affectively turning the engine into a boat anchor.2) What was the plan to get John Morton back on the track?
Get an engine, put it in the car, put John Morton in the car, and put the car on track. Simple enough, except finding an engine that could perform was the challenge.As word spread through the paddock that John Morton needed an engine, the Datsun Community banded together, and offers of engines came swarming in. Multiple race engines and high performance street engines were all up for grabs. All were seriously built engines, but none of them felt right.
Rob’s ultimate plan to excavate a couple E.B. Parkinson motors, like dinosaur fossils, was crazy to say the least. But, going with his gut, the resurrection of a true vintage race engine was put in motion. Half of the crew went with Randy to his storage to look for a replacement motor, while other half, including myself, received the green light from Rob to began the task of removing the expired power plant in anticipation of the Datsun Relics arrival.
3) Technically, what was involved with swapping parts and prepping the 40-yr old parkinson motor?
The old engine came out quickly, as many hands made light work. It was then tucked away into the back of the trailer, to be disassembled at a later date, as we worked on getting the car ready for its new engine. Prepping the vehicle was pretty simple, but there were necessary steps and precautions that need to happen to make this a successful transplant. We only had one shot at this, so nothing was left to chance.
Below, (L): Gary Brizendine and BRE Engine Chief John Caldwell lend a hand and knowledge: Caldwell is confirming the jetting on the 50mm Mikuni carbs. (R) The original exhaust system from the 1970s is removed from #46. Morton had already blown apart the exhaust tips on the first session!
With any catastrophic engine failure, one of the concerns is metal bits getting stuck in the oil cooler and lines. So, first thing is to remove the oil cooler and hoses and flush them out. Any leftover engine material in the oiling system can destroy a fresh engine in minutes. Luckily, Road Atlanta’s used oil disposal shed also had 2 solvent tanks, which we used to back flush the cooler and clean the lines of any possible debris. While all the reusable pieces were getting cleaned internally, we moved on to cleaning the mess of shrapnel and engine oil that coated the engine bay. Just as we finished, the oil cooler system came back fresh and clean, and shortly after engines arrived. We could finally switch gears to the reassembly of the BRE 240Z.
The crew brought back two “long block” engines, meaning the cylinder head and engine block had already been assembled. At first look they were identical in every way and definitely appeared to have been sitting for 40 years. Looking closer, we found one of the engines did not have the timing chain installed which led us to use the one that was “more complete.” We put a wrench on the crank bolt and it rotated 720 degrees, smooth as butter. The next task was to take all the undesirable accessories from the old engine. The 40 year old water pump, alternator, flywheel, crank pulley, thermostat housing, oil filter adaptor, and valve cover were all tossed. We then tackled a quick clean up, removing years of dirt and grim that had built up while sitting.
[ …[read more]
Glenn is an avid Datsun enthusiast having owned and raced several cars. You might remember his VIPS 240z vintage race car from the Rolex Monterey Motorsports Reunion last year where he ran it alongside our hero John Morton:
We also dyno-tuned the Z in preparation for race week. Look for #39 at this year’s RMMR!
Glenn loves his vintage race cars and he recently added this B-sedan Datsun 510 to his stable. He plans to race it this year with SVRA, and it also got accepted to the 2018 RMMR event!
In preparation for the upcoming RMMR, Glenn visited Z Car Garage to have the B-sedan dialed-in with chassis dyno tuning.
Chassis dyno tuning is extremely beneficial for race cars. You simply can’t run your race car up and down a city street to emulate race conditions and “guess” how your engine settings are performing. In most cases our customers have their engines built and tested on an engine dyno, so it is prudent to confirm performance on the chassis dyno before heading out to the track.
We run a series of dyno tests for the customer, including fully heat soaking the engine to ensure it can perform throughout the rev range. Glenn’s 510 was optimized for drivability in his desired powerband and like all race cars that get dyno’d at ZCG, his 510 left with more hp/tq! Enjoy the video of a few dyno pulls and listen to that L-series sing:
We can’t share numbers as racers like to keep them close to their heart, but you can count on the 510 being ready to rock in the B-sedan group at big race. Thanks for letting us tune your Datsun, Glenn!
