Ive been reading about both of these engines for fun (and because there are several the local salvage yard for cheap) and was wonderi mg what you guys think is better and why?
Im partial to the 2jz because straight 6 and boost but the 1uz is fairly small and can apparently make bonkers power.
2JZs command a premium.
In reply to Appleseed:
Very true but in this case its an NA 2jzge.
you can find a manual trans for a 2jz but you need a $500 adapter for the 1uz.
^ Trans options are definitely something to consider. Manuals for either (W58s or R154s) are starting to get pretty pricey, and you need to piece together a flywheel, clutch kit and adapter for the 1uz.
1uz sounds WAY better, so if you're building something for fun, that could be a big factor. In my opinion, the 2jz sounds a bit like a tractor when it's uncorked.
In reply to JohnyHachi6:
There are options for adapters as well IIRC. I think the 350z 6speed was a choice.
Ive only ever heard a 2jz. Whats the diff between a 2jz and 1jz?
Fitzauto wrote: In reply to JohnyHachi6: There are options for adapters as well IIRC. I think the 350z 6speed was a choice. Ive only ever heard a 2jz. Whats the diff between a 2jz and 1jz?
variable valve timing vs non iirc
In reply to MrChaos:
Would that change the sound that much?
In reply to MrChaos:
Nope, you could get 1JZs and 2JZs in both VVT and non-VVT variants. The 1JZ was the earlier engine, smaller displacement (2.5L versus 3.0L) and less power. Also can usually be had for cheaper and can still make respectable power.
MrChaos wrote:Fitzauto wrote: In reply to JohnyHachi6: There are options for adapters as well IIRC. I think the 350z 6speed was a choice. Ive only ever heard a 2jz. Whats the diff between a 2jz and 1jz?variable valve timing vs non iirc
Kinda. The biggest difference is the 1JZ is 2.5L while 2JZ is 3.0L. The early 2JZ didn't have VVT. Around 1998 VVT-i happened along with distributor-less ignition.
The 1JZ was never sold in the U.S. Smaller displacement (2.5L vs 3L) is the main difference. Neither the 1JZ nor 2JZ had variable valve timing until the late 90's so that is no reason to choose one over the other.
In regards to the original topic, IMO the most important difference between the 2JZ and 1UZ is the dimensions and packaging. The 1UZ will fit a lot of places that the 2JZ won't, the trade-off being that the 1UZ is much more dense and arguably less straightforward to service.
The 1UZ I recently fired up on Megasquirt sounds like the Lexus powered Daytona prototypes I worked on 10 years ago. It only took 1 week for the first noise complaint.
The 1UZ and 2JZ both have their benefits and drawbacks. If you want a 6 then 2JZ, if you want a V8 then 1UZ. Both are very strong mechanically, but may require a bit of searching/fabricating for specific applications.
My 1UZ has a bellhousing from Australia, a 6 speed GM style gearbox, a multiplate clutch, and a custom flywheel. Boost will be added in the future.
In reply to stafford1500:
Oooh tell us more! I just picked up a 92 LS400 that will be donating its guts to my challenge car. What megasquirt did you use?
In reply to singleslammer: I used the MS3-Pro because this is intended as a street car when it's all done. I did convert the dual distributor from the early 1UZ to coil on plug, which meant the cam covers got modified. The internals are all stock and the intake is relatively unmolested at this point. The bellhousing was purchased from Castlemaine Rod Shops in Australia a few years back. The price has jumped a bit since I purchased it but the quality is quite good. Gearbox is a Richmond Gear 6 speed, which seems to be un available thru the common places anymore. Flywheel is a button flywheel behind the flexplate from the Lexus automatic, with a Tilton 7 1/4" clutch.
So far the MS3Pro install has gone quite well and the car is getting some basic tuning done before it sees the road. And some exhaust work to keep the neighbors from complaining.
I believe the JZ is more mass, and because of that harder to place in a chassis
Fitzauto wrote: In reply to JohnyHachi6: Ive only ever heard a 2jz. Whats the diff between a 2jz and 1jz?
Can. Not. Resist.
In reply to EvanR:
Knew somebody would go there.
For all who care: I am entertaining the idea of putting a 2jzge converted to turbo into my 240z. Was wondering about the 1uz as well but seems like it comes down to v8 vs L6 for the most part. Horsepower goals would be 400-450whp.
In reply to Fitzauto: 21st cent Scarab??
In reply to oldeskewltoy:
Could be fun! Still in the planning stages right now however and my love for the straight 6 is strong.
For the 1UZ there's options to use the 350z/370z 6spd, 240sx/300zx 5spd, R154, W5x, and maybe the V160. All require adapter plates and kits. Which can get expensive. Try this place Collins Adapters I had his 1UZFE to z33 6spd kit. BTW the Z33 is a big ass transmission.
The LS400 1UZ is front sump and that's what people usually need for swaps. Of course you can get an SC400 and swap the sump and oil pan.
You can thank the drifters for all these 1UZ goodies popping up, they love using this motor.
Are there any turn-key clutch/flywheel options for the 1uz? Or is everything a one-off custom thing?
Those Collins prices are pretty good. Certainly worth the money for the trouble.
There have been a few efforts made to try and get a typical clutch assembly built up using existing bits (3SGTE flywheel and clutch) but not much headway has been made since everyone wants a slight modification.
I went completely custom right out of the gate and made a 7lb button flywheel to accept the Tilton 7.25 inch clutch housing. That meant a few (a lot) of hours on a friends lathe and mill. The motor revs beautifully. The alternative was a 35lb flywheel that came with the bellhousing I got from Australia. It's still sitting on the shelf and takes a 10.5inch Chevy clutch.
Thats the one downside to the 1uz. Some parts basically have to be custom whereas the 2jz you have choices.
Both are amazingly well engineered though. Which makes choosing difficult.
I have 2 1uzfe's. It is a fantastic engine.
Fitzauto wrote: In reply to EvanR: Knew somebody would go there. For all who care: I am entertaining the idea of putting a 2jzge converted to turbo into my 240z. Was wondering about the 1uz as well but seems like it comes down to v8 vs L6 for the most part. Horsepower goals would be 400-450whp.
Go over to the Chumpcar forums and search for 400SX. Apparently some guys put a 1UZ in a 240sx and cleaned a bunch of people's clocks to the extent that they're all butthurt about it. Rumors (absurd?) that it was clocked at 165mph at Brainerd and all kinds of other lore. It's a veritable Keyser Söze.
I do like the notion of keeping the L6 since it's a Z car, but might as well put an RB in there.
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