Twin Turbo (CARB Legal) 2018 370z NISMO

KarlKFI

I finally did it.

I've wanted to get my car supercharged for years (see Supercharging in Cali), but was worried about voiding the warrantee and making the car less reliable. But my warrantee is expired now (early 2018 model) and earlier this year, Eugene Turkov (ByThaBay) got his Twin Turbo kit CARB tested and approved. So it was time!

It's not the cheapest forced induction option, but it is pretty competitive with the other twin turbo kits. I can’t legally crank the boost up as high as those of y’all outside of cali, but it’s still pretty quick, and hopefully a bit more reliable than the old stillen kit, which is the only other kit that's CARB exempt.

- kit: https://vq37tt.com/products/eac-twin-turbo-kit
- install: https://vq37tt.com/products/eac-twin...t-installation

It's got:
- 2x Nissan R35 GTR Turbochargers (re-built by PT Turbo)
- Turbowerx Exa-Pump Oil Scavenge System
- Z1 Urethane Adjustable Engine Mounts
- Denso R35 GTR 650cc Fuel Injectors
- AAM Stage 1 Intercooler
- Omni 4 Bar Map Sensor
- Custom fabricated aluminum piping + black powder coat
- Z1 Oil Pan Spacer
- Z1 Oil Cooler

I just got the car back today, just about 3 weeks after I dropped it off. Pretty quick turn around!

Still need to dyno it and get the final tune.
But so far the car runs pretty great!
It's definitely got a monster under the hood waiting for me to let it out.

Worth noting, we had to delete the NISMO body damper bar, because it overlapped with the oil cooler and pipes. The intercooler might have a little bit of the same effect tho. It's unclear if the bar is necessary off the track, but it's a bummer to lose it (it's not cheap).

Will add some more pics soon!

Attached Images

370z-nismo-twin-turbos-medium.jpg (82.6 KB, 21 views)

KarlKFI

Waiting for the dyno (pre-install)


On the dyno (pre-install)


Bumper, cover, and stock intakes removed (pre-install)


Engine out. It's happening!


Manifold replaced and wrapped


Heat shield installed


Driver-side piping


Passenger-side piping


Spinny boy!


Cats & transmission re-installed


Oil cooler mounted


Oil cooler hoses & hardware


Lower piping fabbed


Upper piping fabbed and powder coated


Intercooler installed


Engine bay (post-install)


Special thanks to Eugene for keeping me up to date on the install with pictures (most of the above are his).

Been loving it this weekend! Can't wait to get it on the dyno and see what this baby can do!

KarlKFI

Well, the kit makes more power than the stock Exedy clutch can handle!

Surprisingly, the car still hit the advertised peak numbers (430/400):
- 427 whp @ 6220 rpm
- 406 ftlbs tq @ 4270 rpm

It could have made more, even with the stock nismo exhaust, on pump 91 octane, with the cats still installed, but we found out that hard way that the Exedy clutch is only rated for 383 ftlbs torque. The power curve hits that and the clutch slips. It’s still totally drivable day to day, but it slips if you floor it. Honestly, I drove it around town for a week and never had enough road in front of me to floor it, so I didn’t notice. But I’m probably gonna have to get the JWT clutch, rated for 600 ftlbs, to get full value out the kit, especially if I want to track it.

NissanParty

I just found out about this kit today, I will be following this thread. Are you driving the car now or waiting for the new clutch? I am really glad to see another CARB approved option for us, I didn't think it was possible!

ZontheRocks

Slipped under my radar as well. Keep us up date in the progress of the build!

__________________
'16 Pearl White Sport | Stillen Gen. 3 | Motordyne ART | Motordyne Shockwave | ZSpeed | Powertrix | EVO-R | Aeroworkz | Nismo | Z1 | EcuTek | Tuned by Seb @ SpecialtyZ

KarlKFI

The JWT clutch is installed and works like a charm! It handles all the kit torque just fine. It's a little stiffer, a little heavier, but not too bad.

I just got back from a road trip up to Oregon and Washington. Put another 2.5k miles on the Z. lol, it needs another oil change now.

Destroyed a Challenger in the norcal mountains. Good times! It's great having the torque to pass just about anyone, even going up hill, and still have more to spare. The KW v2s and Potenzas did a lot of the leg work keeping me from flying off a cliff, I'm sure.

The dyno trip got delayed, tho, along with a chance to film a few drive-bys. I'll post the new numbers when I have them.

husam2012

Glad to hear you're enjoying the car! Hope we can meet up next time I'm in the area.

__________________
Creator of the GTR TT Conversion Kit, NA Record Holder (401WHP)
Ecutek Master Tuner (VQ37, VR30, VR38, B58, S55, S58)
BTWTuning

KarlKFI

New oil can and washer fluid reservoir are installed!

The turbo kit originally came with 2x prototype oil cans, one on each side. The turbos are too low to drain straight into the engine oil pan, and the kit comes with a scavenge pump, but the oil cans add a little extra buffer so the oil can expand when hot or collect if the scavenge pump isn't running, without backing up in the turbo and coming out the exhaust.

Anyway, the prototype cans were temporary and the new oil can is a single larger can that sits up front behind the intercooler. This way there's only one place to service that's easier to access and the piping to the scavenge pump can be more efficient.

I don't have a side pic, but here's the underside.


When the turbo kit was first installed, we had to delete the washer fluid reservoir to make the new piping fit. This seems pretty common with other kits too.

So Eugene's been working with the guy from 370zed.com, who designed a new smaller washer fluid reservoir, and it's finally ready. Smaller than the original, but nice to have!


Both of these will come standard in the full turbo kit going forward. And it sounds like Eugene will soon be offering a smaller "tuner kit" without these and other supporting parts, for those looking for just the bare essentials.

Heading up to Mendocino next weekend to get new numbers now that the JWT clutch is installed. Stay tuned (pun intended) for results from the dyno!

2011 Nismo#91

Nice work, I'm interested in that washer bottle. They don't seem to have anything up on 370zed.com yet unfortunately.

__________________
GTR TT 493Whp/431lbft, Ecutek, Southbend 6puck,Quaife, RPM RollBar 4Point, R888R, JRZ RSPro F(10R/10C) R(10R/6C) 1000f500r inlbs+150inlbs Tender, SPL everywhere.Full Specs

ByThaBay

The washer tank is an exclusive EAC product and can be purchased through VQ37TT.com website https://vq37tt.com/products/windshie...or-eac-tt-kits

Clippers_FTW

Nice build! I just finished up my build this weekend and hit the dyno! Interested to know what kind of money you spent on your build. mine is A LOT lol

NissanParty

Did you get the CARB approved kit or a different one?

KarlKFI

Yeah, I got the "EAC Twin Turbo Kit" I linked in the first post that has the CARB exemption (EO# D-873). I also had Eugene install it.

Prices were as listed on his website for the kit + install + tax (around $21k in CA).

Then add some other odds and ends on top, like oil, oil filter, brake fluid, coolant, etc.

Then I also replaced my 2018+ OEM Exedy clutch with a stronger JWT HD Clutch, along with a new JWT CSC, and resurfaced my flywheel. All together the extra parts and labor there were around $2k. But if you have an pre-2018 model, the stock clutch should be fine with the kit.

Bonus: The kit was recently featured in MotorTrend: https://www.motortrend.com/reviews/e...infiniti-vq37/

The headliner pics are other cars, but if you scroll down a bit, that pic of the nismo engine bay is my car.

KarlKFI

Here’s the car on the dyno:

https://www.youtube.com/watch?v=Ix6lFG8EHiI

In 4th gear, the curve looks nice and smooth and peaks at 427 whp and 407 ftlbs.


You can see that the torque is much higher than a supercharger at much lower RPMs. So it’s a lot of fun on the road!

In 5th gear, it hits 435 whp and 416 ftlbs.


For comparison, here’s the stock Dyno sheet:

Clippers_FTW

Oh no.. I went with a completely different non ca carb legal kit. I was just saying i just finished up my build and im loving it. I missed boost "coming from a evo 8" and then a v2 cts-v. this is by far my fastest car ive ever had. I absolutely love it. Something about boosting and making fast something that isnt made to be fast that is so rewarding.