Home » This Twin-Engined Nissan 350Z Is An Extreme Way Of Solving Some Big Z33 Problems

This Twin-Engined Nissan 350Z Is An Extreme Way Of Solving Some Big Z33 Problems

Nissan 350z K Swap Ts
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The SEMA show has always been about pushing the envelope of custom cars, and what’s more envelope-pushing than adding an entire extra engine? This twin-engined, Honda K-Series-powered Nissan 350Z on the ENEOS stand at SEMA is a radical project, and it should resolve some common issues with the Z33 platform, all while bringing all-wheel-drive to the party.

I like the VQ35DE, but I must admit, it has some problems. Oil consumption is a real issue for these engines, to the point where checking oil levels at every fill-up is critical to avoid coating a local highway in a chunky layer of metallic detritus. You can’t spell Superfund without ‘super fun’, right? Oil consumption is a frequent topic of discussion on 350Z owners forums, to the point where eating a quart every 1,000 miles is common. While a re-ring and new valve stem seals usually fixes this issue, swapping in two Honda K24s is certainly another way of remedying an oil-burning VQ.

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K Swapped 350z Engine

This family of 2.4-liter four-cylinder engines found in everything from the Acura TSX to the Honda CR-V is fairly stout and an increasingly popular engine swap option thanks to massive aftermarket support, such as the Hondata ECUs this car runs. Of course, putting a K24 at each axle on a 350Z will require some serious fuel system updates, but that actually remedies another 350Z issue.

See, the factory fuel tank on a 350Z sits around the rear differential snout like a saddle, and that can create fuel starvation problems. With sticky enough tires and high enough sustained cornering forces, the little siphon feed in the tank can’t keep up, and flow to the fuel pump can be interrupted. Z1 Motorsports, a reputable Nissan Z aftermarket specialist, claims that fuel starvation can happen “when making long sweeping right-hand turns at speed with as much as 3/4 tank of gasoline on R-compound tires.” That’s, uh, not good. I only experienced this once in my Infiniti G35, which shares a platform with the 350Z, but it was a good reminder to keep the tank well-filled. This twin-engined car uses a Nuke Performance surge tank to run two fuel tanks, but the surge tank also prevents fuel starvation. Needless to say, this is an expensive but awesome piece of kit.

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K Swapped 350z Rear

Even setting aside the unorthodox fixes for common stock 350Z problems, this twin-engined K-swapped 350Z is a fascinating and extensive project. The fabrication work needed to fit two transverse powertrains in a sports coupe that came with a longitudinal V6 is remarkable, with everything outside of the passenger cell tube-framed by builder MLZ Garage. Fitting Brembo calipers from a Genesis Coupe on the front axle is ingenious, and blending a 370Z Nismo bumper in with 350Z coachwork takes a remarkable amount of skill. It feels like the internet age meeting the glory days of Car Craft, and I’m 100 percent here for it.

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Maxzillian
Maxzillian
7 months ago

Biggest hesitation I have to twin engine cars is the amount of rotational inertia the chassis has with engines at both ends. Great for straight line performance, but really kills how nimble a car can be.

You kind of see it all the time with people who focus on making a car have a 50/50 balance, but they don’t focus on where that weight is distributed. Weight balance is definitely an important factor, but doing something like relocating the battery from the front of a car to the very rear can have unintended consequences along with the gains.

TOSSABL
TOSSABL
7 months ago

I want a transcript of the birth of this idea
”What are we gonna do for SEMA this year?”
”How about dual twin turbos?”
{sounds of tape measure in the background}
”Hey, you know that Honda you just bought?”

Andrew Wyman
Andrew Wyman
7 months ago

I don’t know much about twin engined setups, but I need some help understanding how the transmissions are linked and don’t cause hell when trying to shift.

Andrew Wyman
Andrew Wyman
7 months ago
Reply to  Andrew Wyman

Also I searched all over but could only find videos of a single shifter. Their tiktok has the most content.

Rust Buckets
Rust Buckets
7 months ago
Reply to  Andrew Wyman

Since it’s cable shifted anyways just hook up both cables the same, so both transmissions will be shifted the same. Gonna increase shifting effort and maybe make it a little mushy but that’s the sacrifice you have to make.

AC2DE
AC2DE
7 months ago
Reply to  Andrew Wyman

Imagine trying to get both clutches to bite at *exactly* the same point.

Hugh Crawford
Hugh Crawford
7 months ago
Reply to  Andrew Wyman

If I were doing this, I would go with automatics.

Pappa P
Pappa P
7 months ago
Reply to  Andrew Wyman

I’ve seen this done with some trick shift linkages.

Jeff Hager
Jeff Hager
7 months ago

I’m here for the burnout caused by 1 transmission in 1st and the other in reverse.

Last edited 7 months ago by Jeff Hager
Buzz
Buzz
7 months ago
Reply to  Jeff Hager

“As God as my witness, he is broken in half!”

TOSSABL
TOSSABL
7 months ago
Reply to  Buzz

“It’s just a flesh wound!”

Whynotsharks
Whynotsharks
7 months ago
Reply to  Jeff Hager

I feel like they did that with the Twinpala or at the very least talked about it before they grenaded an engine.

Jeff Hager
Jeff Hager
7 months ago
Reply to  Whynotsharks

Yes, and SCC had a Hyundai Tiburon that did it too. I feel that any car with 2 engine/trans combos should always do this!

Captain Muppet
Captain Muppet
7 months ago
Reply to  Jeff Hager

The production spec twin-engined 2CV Sahara would struggle to do a burnout at either end.

I had a single engined late spec 2CV with the “big” engine (602cc and 29bhp) and hooligan 17 year old me couldn’t do a burn out.

Crimedog
Crimedog
7 months ago
Reply to  Jeff Hager

Came here to say this. I am pretty sure it was the first “Ultimate Street Car Challenge.”
Dude claimed to win 10k a night street racing, but whatever.
He did the Drive/Reverse thing in “Gross Display of Horsepower”

Pappa P
Pappa P
7 months ago
Reply to  Jeff Hager

That car was shocking!
I think it had about 700hp total and it was a pure sleeper

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