There is so much to consider when swapping one of these into a vehicle that most advanced swappers would still choose another engine. I didn't see anything about the oil pan setup and that is one of the larger problems you will have to deal with as they are not rear sump from the factory and your mk4 will need a rear sump setup (spoiler you can't really do it easily due to the oil pump) or a dry sump setup to just physically get it in there.

This is a good read, there is a member who has been swapping one into a SC which is going to be eerily similar except for some wiring parts. Hasn't posted in the last year so can't say how far they got past what is on there.

Maynanators 1gz swap project - ClubLexus - Lexus Forum Discussion

Build Threads - Maynanator?s 1gz swap project - https://cimg9.ibsrv.net/gimg/www.clublexus.com-vbulletin/1125x984/b4703072_206e_4dee_91ce_1c88bea4b036_a62e7431711340dc2401837469a371277c6ffc2c.jpeg...

www.clublexus.com

 

Def drysump.

 

Hi,

I've loved my na supra for a long time in its stock form. The 2jz is a beautiful utterly fantastic inline six engine. Around 3500rpm in 3rd gear is so enjoyable without breaking the speed limit.
BUT..
The time has come for my ultimate dream of v12 swapping it. This has been a long time dream project.

This is the plan it will be clear where advice is needed for this project.

-1gzfe naturally aspirated build
-ITB setup
-500whp
-Full internal build
-Equal length exhaust headers MUST.
-It has to remain manual (if possible someday a custom gaited shifter setup who knows that's not important rn..)
-will consider an automatic setup (like a dct setup) if cost and ease of install is significantly better.

Thats it!. That's my dream build.

Step 1 is complete which is to buy an na supra. I have a fully running na mkiv jza80 with a w58.

I'm on the hunt for a 1gz now.

Are there 1gz experienced folks here who know how na tuning works for this platform? I saw Hartley engineering made a 750whp crazy custom 1gz but that's way too much. I want 500whp or even 440whp is perfect. It just has to be naturally aspirated and ideally high revving with equal length headers for sound.

Let me know any experienced input is appreciated very much👍

WTF Auto in Australia offers a 1GZ-FE swap kit that includes absolutely lovely billet parts to include the oil pan assembly, oil pump, engine brackets, etc.

JZA80 Supra V12 Conversion Kit Complete

*** Prices do not include GST. Taxes where applicable added at checkout. Backordered Sump, engine mount & oil pump conversion kit for the 1GZFE V12 engine to fit neatly into the JZA80 Supra engine bay. Kit requires some additional donor components including a 2JZ original dipstick and tube...

wtfauto.com.au

Not cheap though. Also note that it doesn't include any provision for a transmission - If I were starting on this on my own, I'd probably go Nissan CD009 using one of those kits that uses an A340E auto bellhousing. If you source an earlier 1GZ-FE engine set it'll come with an A340E auto trans and hypothetically you could use that auto bellhousing for the 1GZ and get a custom flywheel done for the 1GZ bolt pattern and sort out a custom clutch, etc from there. Gated 6-spd isn't going to happen unless you use a Ferrari gearbox or get really weird and sacrifice a lot of shift quality for the sake of a Ferrari wannabe shift plate. I'd just keep a shift boot.

ITB's I'd probably find two sets of I6 ITB's from a BMW E46 M3 and sort out adapter plates and throttle linkages and synchronization hardware from there. Alternatively, four sets of Triumph T595 throttles could possibly work, or any four sets of 4 cyl motorcycle ITB's just chop off the #4 throttle on each one I'd go BMW I6 throttles just out of simplicity.

ECU, almost can't overspend on this. Syvecs, Motec, Emtronic, something like that. Expect the custom wiring harness, injectors, fuel system, etc to cost $$$$ plus tuning.

Top end performance offers forged rods and pistons for the 1GZ - they're not cheap. But the stock internals will not support very much HP when turbocharged or otherwise, so it's likely to be a requirement. Camshafts basically don't exist, I'd contact Hartley and beg them to sell what you need separate from a whole engine. While those engine packages are expensive, there's a ton of value in having ALL of that stuff already done and engineered and sorted out, leaving you with only to figure out how to install it in your car.

Longtube headers, I'd expect that to be very expensive and problematic to sort out on the driver's side with the steering shaft. If there's any one aspect of your dream goals here that likely have to be compromised a bit, I'd bet on the headers. A V12 will sound glorious regardless so I wouldn't worry about that too much.


Overall I'd buckle up for spending at least $40,000 USD on this between the 1GZ engine, trans, custom parts, custom fabrication, engine building, tuning, and everything else. I hope you manage to make this happen!

 

That's neat didn't know they had a kit. Very shiny!!
I'll also add with the auto bellhousing route they don't all have the same spacing.
I know the adapters work on a 1uz bellhousing (which came with the 4speed auto), but they don't work on the later 2uz bellhousings (with the 5speed auto) as the bolt spacing is different.
I have no idea which spacing the 1GZ has, but maybe go for an earlier year to have a chance at being the same pattern.
If it is a Soarer R154 might be a good combo behind it that would bolt to the adapter.

 

That's neat didn't know they had a kit. Very shiny!!

It sure is! But the costs of a 1GZ.. boy they add up quickly. ~$4500 USD for the used engine and trans, then ~$5k USD for that swap kit, then ~$6500 for the Top End Performance JE pistons, Pauter rods, and ARP hardware and bearings. Over $15k USD and still no engine assembly or machine work, no transmission, no ECU, no valvetrain or camshafts, no ITB's, no headers or exhaust...

It'd be an awesome swap, but it'll sure melt down some credit cards in the process.

 

I'd say another 10k for wiring and ecu tuning, 10k for custom headers and ITBs, 5k for transmission and driveshaft. Good luck on the cams, maybe have some adjustable gears made so you can at least move the powerband up.
One thing to consider is the guy on instagram making a 4.8L V8 based on the Honda K-series. Maybe see how much that unit would cost (much smaller, but revs to the moon and will easily make this power). I don't know where he was at in the project now, haven't looked it up in a while.

 

I'd say another 10k for wiring and ecu tuning, 10k for custom headers and ITBs, 5k for transmission and driveshaft. Good luck on the cams, maybe have some adjustable gears made so you can at least move the powerband up.
One thing to consider is the guy on instagram making a 4.8L V8 based on the Honda K-series. Maybe see how much that unit would cost (much smaller, but revs to the moon and will easily make this power). I don't know where he was at in the project now, haven't looked it up in a while.

They’ve been doing these motorcycles v8 engines for years. They have two busa motors put together also. 2.8L FI and 3.0L NA. Both spin to around 10,500RPMs. Crazy little suckers. The FI one would be righteous, think it’s about 700ish hp 500ish tq. Dunno haven’t really read up on them on a bit.

 

This sort of project would drain some serious bank accounts. I note you're a fellow aussie so I would suggest getting on the phone to WTF Auto (who make the kit Wreckless posted above) as they were working on their own V12 MKIV project a few years back. Not sure how far along they are with it but they could give you a reasonable estimate on the job and cost. I'd honestly be surprised if it comes under 80-90k AUD done right though.

If you're ok to lose a few cylinders but keep with the all motor ethos I think Ed's old 1UZ was one of the best NA Supra builds Australia ever saw. 310rwkw is pretty insane for something as responsive as this thing was. The engine and parts are much more easily obtained. Here it was here:

UZA80 Photos they *should* have printed but didnt... - A80 / MKIV Discussion

UZA80 Photos they *should* have printed but didnt... - posted in A80 / MKIV Discussion: well 10 months later and HPI finally sent me the photographer's disc of images...what can i say other than, man! am i disappointed with the ones they actually printed! the article was embarrassing enough, but...

www.supraforums.com.au

I know after the 1UZ Ed then swapped in a 2UZ block (4.6 litres) and then shortly put the car up for sale (EOI). It was an absolute steal back then (12 years ago) but I'm not sure if ever sold.

Eds uza80 supra: eoi @ 29,900 ... *cry* - Cars - For Sale

Page 1 of 2 - Eds uza80 supra: eoi @ 29,900 ... *cry* - posted in Cars - For Sale: with included sads, heres the full ad.http://www.v-eight.c...ZA80 Hi Res.pdfplease direct enquires directly to ed@v-eight.comcheersed

www.supraforums.com.au

If I was going for an motor Toyota (no LS or K swap) build today I'd be using that car as a baseline.

Wish I knew where it ended up. Was an amazing car.

 

Wish I knew where it ended up. Was an amazing car.

I remember seeing a video of this on YouTube. Sounded absolutely insane, but didn't seem to idle very well. Always wondered if there was a spec sheet laying around somewhere for that car, thanks for the link👍.
Here's the YouTube for anyone interested:

 

I was more active on V-eight.com back in the day than here. I understand there was some drama involved with the two and some of the members.

 

All I can say is, make sure you have lots of money to throw at this. This conversation is not for the weak hearted.

We had a customer spec one of these projects up with us but with twin turbo for 1000hp and the budget was over 100k. Will be cheaper NA, but you will have to build the engine as they are fairly shit stock for making any sort of high end power. Pistons and rods are limited and big cams are basically non existent, have to weld and grind stock cams to new profiles and port the heads for any major power increases.

I’ve got an engine we bought for said customer but won’t be going ahead with it now so looking to sell in the motor if you are still feeling brave.

 

This some random dude making something in a shed, or is this something you can buy?

Some guy that's got some terminal illness or something that's designing everything in CAD and having parts prototyped. Think he had the crank done and some other stuff, let me see if I can find it.

 

Amazing how inexpensive the engines are when used. Would be great just for the sound.

 

This some random dude making something in a shed, or is this something you can buy?

Neutron Engines' Honda-based K48 V-8 promises to be a pint-sized screamer - Hagerty Media

With a goal of 10,000 rpm and over 700 hp, the K48 should be a real screamer for its 5.0-liter package. Read the story of this V-8's unlikely birth.

www.hagerty.com

That's the company and engine.

Amazing how inexpensive the engines are when used. Would be great just for the sound.

They sound good, but I don't think it's cheap to make them sound good.

 

@signalpuke Thanks for the link, I'll read up on that.