DaveD

do you find the 3.7 gearing a bit short? do you have bad traction issues gears 1-3? with 3.7 that just means faster take off compared to 3.26, you get that better power band.

Well I am looking into getting a car directly from Japan, imported. Looks like I have some thinking to do what will be worth it. I can get an RZ for pretty cheap but has fadded paint, riced out body kit so no one wants it, or some body damages. As long as its mechanically sound. Or maybe I can score a deal on one with like 150,000 KMs+ (which go for 550-600,000 jpy on auction), then I could freshly rebuild the engine and go single turbo build right off the bat. If I was to get an SZ-R it would need to be mint.... so with the money for my budget It would go towards the swap. Like I said I'll see what me and my exporter come up with.

what about the wiring harness?

I found a thread over on the American supraforum of someone that documented this swap. It looks like I would need to get the NA wiring harness merged with the Aristo harness, this alone costs $600 USD Also I will need to purchase about $500/600 USD+ in the main big parts such as water pump to complete the conversion. The swap is projected to cost $4000 USD just to get this motor into is car with all the basic/required work. This includes the cost of getting an Aristo motor with ECU and harness. That's how much someone paid just to do it themself. I think I will be better off finding a Supra engine. I know they are out there I just have to do some research and call around. Maybe even get one imported from Japan. Even if I pay 1k full more, at least I won't have to convert any of the parts or the harness... STRAIGHT SWAP!

Problem with that is they aren't as easily to come by ^ and I've done aomd searching and ready around, some say its pretty straight forward and other say its lots of extra parts needed? Aristo motors are also being advertised as low mileage which is a big want for me.

I am looking into getting a 1996 SZ-R 6-speed Supra. The purpose is to do a 2JZ-GTE swap and build it with single turbo. So I see these Aristo motors for sale online (non VVTI). It seems like most come all ready to go with the ECU and a nice uncut wiring harness/loom. So my question is... if I get an Aristo motor will the ECU operate exactly as needed? such as if I plan on adding a piggyback to it. Or is it recommended to purchase a JDM TT 6-speed ECU. If so how much should they generally cost? I haven't found too many for sale. Besides the oil sump location which can be changed... is it a pretty straight forward swap? with the wiring harness from the Aristo engine work as well? I am looking into buying these engines and then making it single turbo for about 550rwhp... then swap it into the SZ-R 6-speed. cheers

one more thing. I pretty much bought this car the way it is with the 2jz-gte 6-speed swap

I wont be the one rebuilding it I'm getting a mechanic friend of mine to do this job. there is a big thread over on US forum, the LSD is a direct swap into the GS400 diff. Many people have done it and its a straight swap. So I don't see why I should have a problem. but I understand what you mean its just better to get a Supra one, I was offered $850 USD for one. But when I use the Supra diff I may need to change the axles.

Thanks for all the help. but I was able to find a 1998 GS400 differential from Lexus. It is a direct swap into a N/A with no modifications. I already have LSD, which will drop right into the GS400. A lot of the guys in the States take this route and seems like people have no problem.

anyone can chim in?

any experts can confirm?

I recently picked up a OEM flywheel which supposedly has 12k miles from the United States. That's about 20,000 KMs. If you run your your finger along some parts its not exactly smooth (bit bumpy), not sure what you wanna call it.. hot spots or stress marks? If I just put it in like this it should be fine? If I have to get it machined that isn't a problem since its cheap.. but I have read somewhere that the OEM flywheel is not that easy to machine? http://img16.imageshack.us/img16/3716/img0383ab.jpg

I have been reading somethings about 200mm vs 220mm. Apparantley the N/A and Auto TT are 200mm, 220mm was only for 1993 - 1996 TT 6speed... But if I swap in the ring gear into my N/A diff, and it has the 3.26 gear ratio. Would it make it pretty much the same performance and so on as a reguar TT LSD diff? besides the ring gear there isn't much inside that makes any difference? and according to this It can be done , just found it - http://94supraturbos.synthasite.com/gs400.php

Okay let me clear some things up. My Supra is originally N/A. It still has the original rear end which is A01B. my Supra has the 2JZ-GTE swap with 6-speed. I would like the same gear ratio like a Supra RZ (3.26). I have purchased a Lexus GS400 open differential pumkin. So I would like to use the ring gear from the GS400 differential and put it in my diff. OR if that does not work I can put my Supra's Torsen LSD into the GS400 differential. So I'm making this thread to find out if these options would be work ^ And maybe I worded it wrong but what I meant is just that the 4.083 gear ratio is very short! it practically has no first gear. thanks in advance! cheers.

I have a NA diff with factory LSD (A01B). All I really want is 3.26 gearing ratio, the 4.083 is too tall for me. I have a swapped 2JZ-GTE 6-speed. I was thinking if its possible to put a 3.26 ring gear in the NA diff? I have a Lexus GS400 open differential I am waiting to do something with. The high gearing is very annoying for a street car. The top end is also 140mph with this ratio. I will be going single turbo soon so the 3.26 gear ratio will be perfect. If I can't do that... Another option would be if I could possibley put the LSD from the NA into the GS400? if I want to swap in the GS400 differential Is there anything else needed to complete this swap? such as the axles? or..? thanks in advance! cheers.