Thank you for the info Ali!all the vvti motors are the same, so its like an IS300 basically, yes.
vvti has crappier pistons and pencil thin rods, otherwise the block itself is the same block with some small differences.
your options depend on what you want to achieve. if you just want to rebuild as in yours has a lower end problem a is300 motor would do the trick.
A lower mileage one won't help though if you want to turbocharge it and run more than low boost, for that you will need pistons and rods and probably just install to your currrent motor, or you could swap in a non-vvti block and use your current head and electronics (the oil pump and crank sensor would need to be installed onto non vvti block along with other little stuff).
if you can live with low boost then you can na-t your current motor as is but the key is a solid tune.
if you want to swap that is an option as well. really depends on what you are looking to do.
I've heard and read its a nightmare of a swap.. I feel I am better off going NA-T.I would even look at a GTE VVTi for mild boost, I paid $1300 for mine and dropped it in the IS and had no problems out of it. Not sure if you could use the aristo ecu though without a patch harness.
I've swapped a '98 n/a to 2jzgte non vvti. Things I learned:
The swap really wasn't hard, I used a brand new harness, not sure if they are even available now.
I went single, stock twins would have been just as easy. There was a ton of stuff to swap to make it a true turbo car, I used a combo of used and new parts.
1. Won't pass emissions since I swapped to OBD1, probably could get a OBD2 ecu and then could maybe pass emissions.
2. Cruise does not work, the '98 vvti uses cruise through the ecu, this was a surprise, I'm sure I can get around it with some wiring.
Everything else works and the car runs great.
I just picked up another '98, this one is hardtop. I'm going to swap all the 6-speed stuff first and leave it n/a for a bit. Then I will swap vvti gte or might go na-t but will need to change pistons and rods. The rods are tiny in the '98 vvti motor and heard will fail around 400 rwhp.
What are your goals? Are you going to run the n/a auto transmission, if I remember correctly your '98 is also a hardtop?
Thanks for the input, so non-vvti swap is the way to go!? What did you do to the wiring harness?I have a 98 na, I did the whole nat and Tt swap.
I recommend the gte swap non vvti. Going nat will be difficult to tune since its obd2.
Some 98 na's have lsd as an option, ask Toyota to run your vin to see if yours does.
I also have a '98 Sc300 that I bought that was already swapped v160 6-speed and Vvti 2jzgte. Its running on the stock ecu with a single turbo at 14 psi. I haven't had it dyno'd yet, seems like its still pretty rich so can probably up the boost some.Ali_Sc3 would your opinion change on going 2jzgte vvti over 2jzgte non vvti if the op was going to stay on the stock ecu? Every example I have seen where vvti was chosen the car was going stand alone. I am wondering what your opinion would be if the end goal was to stay on the stock ecu.
Yes vvti is all around better, unless you don't like having more power...^ Thanks for the info. Just to clarify non vvti and vvti are the same price here in LA. With that being said, would you still recommend going with VVTI?
what do you mean by stock ecu, like the stock ecu the vvti motors come with?Ali_Sc3 would your opinion change on going 2jzgte vvti over 2jzgte non vvti if the op was going to stay on the stock ecu? Every example I have seen where vvti was chosen the car was going stand alone. I am wondering what your opinion would be if the end goal was to stay on the stock ecu.
Not to thread jack, but if I have a harness made by tweaked could I run the VVTi ecu that comes with it? More in depth, would my gauges still work or would I need to look at some 98+ supra gauges and dash harnesses? Dakota box?If I had to choose a stock motor to put in an n/a mk4, hands down its a 2jzgte vvti. Its the latest revision of the best engine ever and it makes more power with no negatives with regards to making huge amounts of power either. I even like the 1jzgte vvti. you can get those these days with a remote shift r154 for 3500 and that is a mean combo, you wont break any dyno's but it spools fast and makes good power.