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Daisy’s 1972 Datsun 240z

Filed under: 240z,370z,Featured Cars and Projects
by Alvin G @ 4:34 pm on May 22, 2020

 

We had the pleasure of working with Daisy to help get her 1972 Datsun 240z back on the road. Our Z Car Garage Big-Brakes and Z Car Garage CV Axles along with upgraded suspension parts transform this Z into a fantastic sports car.

 

Before we dive in to the upgrades let’s take a look at Daisy’s story:

“My Z history actually started with a 370Z–it was my first car, bought even before I knew how to drive a stick. When I was ready for my next automotive chapter, I tried to think of another beautiful, fun, sporty coupe that wasn’t going to cost 60k, and realized it was my car’s great-great-great-etc-grandmother–the 240Z. So I was on the lookout through Craigslist for almost a year, in search of an S30 that hadn’t had a ton of performance work done to it already, but was still in overall good shape…

… I migrated to eBay and found my car in Texas. I have a vivid memory of standing in a drizzly parking lot a 7AM on a Sunday, watching the car transport guy reverse the Z up a slippery metal ramp to get it off the truck. I chugged it around the parking lot to get a feel for everything, couldn’t get the seat close enough to the wheel and had a TERRIFYING drive back to San Francisco. But I was obviously, already in love…I spent a couple of years really doing the bare minimum to get the car roadworthy, and it was a real champ, flawlessly performing on one very hot and sweaty drive to and from SoCal, but it started to feel like I wasn’t using the car as much as I’d like because it simply wasn’t practical–the suspension was super soft, we were getting tons of cabin fumes, the brakes made my parents incredibly worried (ha!) “

 

Daisy was looking for a shop to take care of her 1972 Datsun 240z  and heard about ZCG from a few different sources–the Z Car FB group and from following Courtney Frisk (Cutchen) the automotive photographer, who’s also worked with us:

“I knew that it was time for some more significant work, so I got in touch with Rob. Ultimately, the goal was to make this a capable daily driver (though I only really use it on the weekends)–not super powerful, just safe(r), reliable, capable, reasonable to drive on contemporary streets–a joy to drive.” 

Daisy brought the Z in late last year and we performed a full inspection.


The inspection revealed many items to be addressed from brakes, suspension to carburation which was really off. Initially we spent a few hours getting it driveable while we put together a plan to add some ZCG touches to her S30.

ZCG Big-Brakes and CV Axles

We handed Daisy the keys to “Mrs. Butters”, our 1971 Series 1 240z shop demo car and she was sold on our Z Car Garage Big-Brakes (for small wheels) and Z Car Garage CV Axles! Butters has a way of doing this to our customers 🙂 Read below for a brief description of these parts:

    
 

As fellow S30 owner/racer Glenn C mentioned in his review, on top of braking performance, pedal feel is extremely important and our Big-Brakes deliver. This is a direct result of working with engineers at Stoptech to create a totally bolt-in solution requiring no M/C change or additional proportioning valve/adjustments. All fitting behind a 15″ Watanabe or Panasport wheel (and some 14″ wheels) and retaining factory emergency brake lever! A few details below:

Calipers: Stoptech ST42 4-piston front & rear race calipers (Alum 6061 mil-spec Type III anodized)

Rotors: 280mm x 20.6 with Alum 7075 hats

Pads: Stoptech 309 sport street pads

Blog posts documenting all of our customers running the ZCG Big-Brakes can be found HERE.

A few closer detail shots of the calipers, rotors and hardware:

 

We removed Daisy’s stock brakes and installed our ZCG Big-Brake kit. The chassis was treated to a full suspension rebuild with new parts, bushings and a full coil-over (Koni) suspension from Techno Toy Tuning. T3 finishes the suspension in our signature color and we really appreciate Gabriel and his staff. They make some of the best suspension parts out there for Z cars.

 

ZCG Big-brakes and T3 coil-overs replacing stock setup up front:

    
 

More pictures of the front suspension refresh with T3 T/C rods and lower control arms, ST sway bars, rack bushings and f/r wheel bearings. We also replaced the steering coupler:

 

At the rear, the factory drum brakes were replaced with our ZCG Big-Brakes. Factory handbrake functionality IS retained!

 

Rear T3 lower control arms, and more refreshed suspension parts and rear Big-Brakes also shown:

 
 

We replaced the brake booster and master cylinder with NOS parts: our Big-Brakes require nothing more than the factory hydraulics!

 

Daisy really wanted the look and feel of Mrs. Butters Z without being too low or riding rough. Mission accomplished: the Z looks fabulous from any angle:

 

Our Z Car Garage CV Axles help transmit power to the ground and ensure smoother operation compared to your standard half shafts. We have over 90 CV axle kits on customer cars and we are stoked with all of the positive feedback.

 

Daisy has CV Axle set #329. Stock half shafts (L) and ZCG units:

 

More pictures of the ZCG axles installed, also visible are the T3 control arms and re-sealed diff:

 

Engine

With suspension sorted, Daisy signed on for a major service tune since we had trouble getting it to run correctly. We replaced the plugs, plug wire set, cap/rotor, fuel filter, replaced VC gasket, installed a MSD blaster2 (black) coil and performed a valve adjustment and oil/filter change.

 
 

We replaced intake and exhaust manifold gaskets with factory Nissan parts and few ZCG tricks including a certain exhaust nut and exhaust stud.The exhaust manifold was replaced with an MSA 6-1 coated header and our ZCG exhaust system with stainless resonator and slash-cut tip

 

Details


A few more items were sorted:  the differential was resealed with new front/side seals:

 

The Z was cut/buffed with a detail. Finally, the tension springs for hood were replaced and the Z now ready for Daisy to pick up.

 

Driving is Believing

When Daisy and her fiance picked up car, they were blown away:

“I’ve only had the Z back for a few days, but it’s incredible! I knew Rob’s tuning was great from the first “check-up” he did on the car, but getting the car back with the Big Brakes, the new suspension, and axle kit–it’s honestly like a new car. My fiance and I were finding ourselves bracing for the bottoming-out-scrape we’ve become used to from the old suspension, and the Z now just sails over them! The exhaust note is beautiful, I can stand behind the car without choking on fumes, and it’s what I really hoped it would be–both practical, and a joy.”

 

The Z was a big part of their engagement photographs in the hills above Bolinas (photographer, Helena Martin)

 

We enjoyed working with Daisy and she’ll be back for either triple-Mikuni’s or rebuilt SU’s and some dyno tuning:

“Working with Rob and ZCG in general is what working with a shop should feel like. When I first got in touch with Rob, we had a detailed “intake” conversation about what I was looking to accomplish with my Z. This was an early, awesome indication that ZCG really values listening to what customers want, not just churning out identical builds or upgrades, or pushing one kind of perspective. While I’d heard that lead times working with ZCG could be long, Rob was always available to chat and check in, answer a question about the work, or listen when I found a new nit to pick about the car. Rob is also just an excellent guy–It’s clear to anyone who’s met him that he’s deeply passionate about this work, and it’s infectious, even for folks who have already caught the Z bug.

Thank you for entrusting us with your S30, Daisy. We are so fortunate to work with owners that appreciate the Z and believe in our ability to make them better! LONG LIVE THE Z!

More pictures in the gallery below:
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Happy 510 Day!

Filed under: 240z,510,Events,Featured Cars and Projects,Performance
by Alvin G @ 4:56 pm on May 10, 2020


Z Car Garage wishes you a Happy 5/10 Day and Happy Mother’s Day! We enjoyed driving our 1971 Datsun 510s on a beautiful day in San Jose. Turbo6, our 80’s revival, is back on the road and running great with its turbocharged 6-cylinder L-series. Look for a full report soon:

 

Rob, Meghan and Tank were in the SR20DET-powered 510:

 

A few photo-ops in Downtown San Jose:

 

We got the Bay Area Datsun Dealers race 510 out too!

 

Enjoy The Boost in this video of the 510s in action. We hope you can Do It In A Datsun today too!




Efrain’s Q60S

Filed under: 370z,Featured Cars and Projects,Performance,Q50
by Alvin G @ 4:22 pm on May 5, 2020

 

At Z Car Garage we have been maintaining and modifying late model Nissan/Infiniti sports cars since 2004. From Z cars (Z32, 350z, 370z) and R35 GT-Rs to G35, G37, Q50/Q60 cars we look forward to working on your vehicle. Efrain S visited us from Sacramento with his 2019 Infiniti Q60S Silver Sport for basic performance upgrades from AMS Performance including their AMS Heat Exchanger and AMS Air intakes and a Z1 Motorsports Blow-off Valve kit:

 

The new heat exchanger compared to the stock unit and installation:

 

AMS air intakes:

 
 

Z1 BOV Kit with red couplers:

  
 

Dyno Tuning

 

Straight from the factory, the VR30DDTT is an impressive motor. The Hi-Output version is rated at 400 hp and 350 ft-lbs tq, underrated as we have seen with dyno testing. With a few bolt-ons and tuning, even more power can be unlocked from the VR30. Rob dyno tuned the Q using EcuTek. Baseline power was 333hp/314tq at the wheels. With the AMS parts and tuning final numbers were 412hp/452tq, gains of +79hp/138tq:

 

The VR30-series responds so well to bolt-ons and gets us excited. It’s almost like Nissan has comeback full-circle as the VR reminds us of modifying Z32TT’s in the 90’s:  big gains with just few upgrades. The Q-series cars are really well-suited to the upgrades too with a very comfortable ride and massive hp/tq when you want it.

Here is the Q on the dyno:

 

Efrain was very pleased with the power gains:

 “Honestly man my experience with Rob from start to finish was amazing. I could tell he loves his job, loves what he does and energy was on 100%, 7 days a week. Once I got the results back from the tune I was blown away I thought I was maybe going to see about 400 horsepower to the wheels at the most and he got it over to 412 with 450 torque, I couldn’t believe it. My bolt-ons are flawless, could not be anymore happy with the work from you guys and the whole experience I love the car thank you guys.”

Enjoy The Boost Efrain!

Are you ready for upgrades on your late model Nissan/Infiniti? Give us a call or e-mail!

 

 





 

Last week we had the pleasure of dyno tuning Eric Straw’s magnificent 1969 Datsun 2000 Roadster. Eric is a long time friend of Z Car Garage and we  first dyno’d this roadster in 2012 while a few years later we enjoyed tuning his RB26DETT powered DR30 Skyline. In addition to being a talented fabricator it is clear that Eric has a penchant for white paint, red valve covers…and turbocharged Nissan powerplants!

 

SR20 Roadster: Version 2

 

After restoring his roadster with an S13 SR20DET drivetrain a decade ago, Eric started working on the next evolution with a totally revised chassis and new engine (the previous setup sold for a customer’s roadster).  The new drivetrain consists of an S14 block (JE pistons, K1 rods, P12 oil pump) with a P11 VVL head (Kelford turbo cams, Tomei cam gears, Taarks VVL relocation kit, R35 coil packs) all mounted to the roadster frame using a Spriso Motorsports HD motor mount kit.

 

Providing boost is a GTX3071r turbo with Tial exhaust housing mounted to a Straw-fab’d custom tubular manifold with CNC 1 piece collector. On the cold side is a custom intercooler with Garrett core and custom intake manifold. It’s both pretty and functional considering the roadster’s tiny engine bay:

 

Backing the SR20VE-T is a 6-speed (CD009) transmission normally seen in the Nissan 350z. The SR mounts to the tranny via a Mazworx bell housing with an OS Giken Twin disk. The shining star in Eric’s craftsmanship is the chassis preparation with a heavily modified frame with tubular x-member and bolt-in reinforcements.

 

It would take another blog post to dive into the suspension but if you are curious about the restoration and more please check out Eric’s roadster featured in this Speedhunters article by Naveed Yousufzai HERE.

 
 

Dyno Tuning

 

The tuning session was conducted with driveability and longevity in mind. Outright peak power numbers were not a priority. Eric’s hometown in Salem, Oregon is where this car would be enjoyed with premium fuel and the occasional 100 octane splash.  Surely more power could be extracted with E85 but Eric is 50 miles from nearest station. Rob comments on the choice of engine management for the SR20VE-T:

“When Eric contacted us about about building the SR20VVL we discussed EMS, and ZCG is a Haltech Pro Tuner. We really like how user-friendly this product is for a tuner. It’s perfect when you need to map out all of the different phases, complete control of ignition/fueling, cam control, idle air…everything to take this car you’ve dreamed of and make it drive like it came from an OEM factory.”

 

Rob dyno tuned the SR equipped with a Haltech 1500 Elite. Initial passes were performed on 92 octane. The plots below show without a boost controller (387hp/287tq) and with a boost controller, making 425hp/331tq to the wheels:

 

Of note is Nissan’s wonderful variable valve timing (VVL) at work with a very flat torque curve and incredible, spine-tingling cam changeover sound. See video below! Eric and Josh drained the fuel tank to add 100 octane for the next passes.  Fueling is supplied by a custom stainless tank (Aeromotive hangler/bladder), custom stainless lines all dash 6, 1300x Injector dynamics and a Radium Fuel rail:

 

On 100 octane the SR20VE-T made 491hp/393tq at the wheels. That is roughly 570hp at the crank. Keep in mind this little Datsun roadster weighs 2250lbs with a hardtop and 14 gallons of fuel!

 

Driving Impressions

 

Following the dyno session we had to take the roadster out for a drive. This video shows multiple dyno passes and test drives, volume up!

 

 

Here are a few driving impressions from the three of us, enjoy!

Eric

“The car went from being an impressive car to completely coming alive and becoming a rocket ship that just keeps pulling. The VVL is like another level of performance. The power comes on very progressive and linear to give the chassis the best chance of getting as much as possible out of it. We made multiple setting to help with driving goals based on the roads and situations we are in.”

 

“The suspension has been a lot of work and has really paid off many times over be able to get this power to the ground and drive the car like it was intended. The rear suspension is so predictable and precise that immediately I had a lot of confidence to be able roll some power out of the corner. Rob had truly made this dream come alive and make this car so very impressive.”

 

Rob

 

“The cam control and air flow from the VVL is staggering, just really super cool. I’m not surprised…from being around the DR30 and seeing all the cars Eric and Michael Spreadbury have built over the years.  This roadster continues to evolve as they continue their craft with each chapter revealing a new level like a boost controller: 5 years ago was 10lbs of boost, 2 years ago 12lbs,  and now 22lbs (this roadster should only be driven on high!) Eric Straw isn’t just one man. He seems to be a mass of people to not only design an engine bay and make it work efficiently but also bolt a non-matching transmission, and then that rear end suspension….obviously one of the biggest things when modifying a 50+yr old Datsun with high power levels is trying to put it down. His engineering accounted for enough tire, brake and balance. The setup Eric built for this roadster I could not believe how we could deliver 500+hp/almost 400ftlbs of torque, and yes we were lighting off the tires but…I still felt like I was in control. We were on ice, but I felt like I was on Speedvision from back in the day of World-rallying Championship..with just a slight motion of the steering wheel I could rotate that car wherever I wanted. 

 

Alvin

 

“As a passenger and long-time roadster owner…it’s not easy for me to ride shotgun in a high-powered car but I still can’t fathom how smooth it felt under intense acceleration. These are super tiny cars and to see both Eric and Rob harness it was a testament to Eric’s chassis engineering. I’ve been in other Datsuns with turbo SRs and they will pitch sideways under full throttle but this one was planted even on our rough downtown roads. Watch the video. It’s epic.”

 

All of us concluded and shared similar sentiments: Eric’s suspension enabled this roadster to manage all that power. When boost hits and the tires break loose it can be seemingly glide controllably with steering input…no hopping or skittering. The rear suspension consists of a hybrid rear axle built by Moser based on a Dana 44 with a Torque arm and 3-Link Watts with Ridetech coil-overs. Up front are custom Ridetech coil-overs and sway bar.  R33 GTR Brembo brakes provide stopping power. The Watanabe wheels are wrapped in 225F/245(!)R tires which are massive for a stock-flared roadster body.

 

We had blast spending the day with Eric and tuning his roadster. We can’t praise him enough for the ingenuity and execution of his build. Eric would like to thank Julie Straw, Michael Spreadbury and Rob Fuller.  More pictures in the gallery below and Enjoy The Boost Eric!

 





 

Max Y visited us in 2018 for bolt-ons and returned in 2019 for a Stillen supercharger supercharger and OS Giken limited-slip differential. Power can be addicting so Max visited Z Car Garage recently for more boost and a full Stoptech Big-Brake Kit to reign it all in.

 

Providing more boost is a 9lb pulley and supporting upgrades to the fuel system including a CJ Motorsports return fuel system with billet hat. Injector Dynamics 1050cc injectors and 485lph Wallbro pump.

 

A Soho motorsports air to air intercooler kit replaces the Stillen air-to-water setup:

 

We pulled the transmission to install a Fast Intentions billet flex plate:

 
 

 

Dyno tuning was performed via Ecutek making 447hp/324tq  91 octane and 475hp/349tq 100 octane:

 
https://youtu.be/Z5U_tCjfzlk

 

With more power available the brakes were upgraded to a full Big-Brake Kit from Stoptech:  6-piston calipers with 355mm front rotors and ST22 calipers in rear with slotted rotors :

 

This kit sports Stoptech 6-piston calipers calmping 355mm front rotors and ST22 calipers in rear with slotted rotors, OEM vs Stoptech front:

 
 

The brakes also look great behind those awesome Enkei R05rr wheels:

 

New SPPC front/rear control arms and a full alignment following installation of larger Michelin Pilot SS 275/40/18 F and 295/35/18 R

 
  
 

It was very important for Max to monitor boost,  A/F, and trans temperature so we installed a  PLX Devices DM100 gauge in the factory clock lcoation:

 
     
 

We replaced the headlights with an HID setup(7k), and installed Max’s rear/side diffuser panels:

  
 
 

Zspeed Performance splash shield:

 
Enjoy The Boost, Max!

 

 
More pictures in the gallery below and LONG LIVE THE Z!

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