2jz vvti

[neverknowsbest]

just curious what anyones experiences are with using a 2jz from another car like the is300 with vvti and how it feels in the mkIII's, also is there anyone that has turbo'd one. id like to know if it reacts well to boost.

and one more, is there anyone who has put the 1jz head on the 2jz bottom end? id like to know some first hand info on that.

someone said the 2jzge bottom end ie. pisons, connecting rods, arent as strong as the ones in the gte. i know their different but does anyone know if they are weaker for sure?

thanks and sorry for all the questions. i found some info around but id like some frist hand testimonies from people who actually know.

 

[BorHor]

and one more, is there anyone who has put the 1jz head on the 2jz bottom end? id like to know some first hand info on that.

Many do that. It is called a 1.5J, I dont think it will work with vvti though.

 

[neverknowsbest]

yea i know it wont, because to the best of my knowledge they dont have any vvti 1jz heads, but that was just another questions. not related to the vvti part.

i was just curious how easy it was to swap in the head, cuz i found a 2jz that might need at little head work but the bottom end is fine

so i wanted to know if it would be better to get the 2jz head fixed or swap in a 1jz head.

 

[BorHor]

Head will be drop in.

 

[neverknowsbest]

and if i read correctly. and i do that, i can use a 1jz wiring harness instead of having to cut up a few different ones if i used a 2jz head.

the only problem there is i'd have a 1.5jz n/a without vvti so id be losing on both ends. but i just plan on staying that way till i can get enough to turbo it.

which is why i wanted to know about boosting a vvti 2jz. after lowering the compression and everything of course. i just havent heard anyone do it or how it responds to it.

as well as i really need to know abuot the GE's bottom end being strong enough.

 

[The Reaper]

no the 1JZ wiring is direct swap with the 2J ask Tissimo on the boards

 

[RacerXJ220]

Haven't heard of it or haven't searched for it? Search more, all the info you need has already been talked about but I'm going to give you a freebie.

Why would you have a 1.5JZ n/a? If you had a 1JZ to begin with and slap on a 3.0 bottom end, why not rape those stock CT-12's the 1JZ came with?

The 2JZ-GE non-vvti have the same crank and rods as the GTE version. The GE block lacks oil squirters, and the pistons are different, but made using the same methods. Going with a 2mm headgasket should yield somewhere in the 8.5:1 area, and if you used a 1JZ head, you'll need to fabricate a new water neck from the pump to the head that is approximately 4 inches. You'll need a new MKIV TT water pump, unless you really want to keep the hydrofan. You will need the 2JZ bottom timing cover, and a 1JZ upper timing cover, and 2JZ belts all around. If you wanted an oil cooler, just swipe the one off the 1JZ/2JZ GTE model, and the feed/return lines that wrap around the block and install them correctly. You're going to have to drill and tap the block, or buy a oil filter adapter with oil lines that run from one side of the motor to the other and you'll need the fittings. The stock MK3 fuel line is a stretch for a 1.5JZ but it will go onto the fuel rail and function fine. If you are shooting for more than 400whp, stay away from vvti, as the rods are weaker, and this has already been proven.

But yeah, the head bolts right on.

 

[neverknowsbest]

yes i have searched, and found alot of info but not answers or in some cases definate answers to my questions, and thanks for your time but some of that didnt answer some of my questions.

the reason i would have a 1.5jz n/a is because i do not allready have a 1jz, and because of cost id be staying n/a for now. i wanted vvti because if i didnt have boost i figured it'd be at least a little something extra.

the motor i might buy depending on a few things is a 2jzge with vvti from an is300. the owner said the head will need to be reworked and resurfaced. but the bottom end is fine. so my question is would it be easier/more cost effective to either (a) find another 2jz head, be it gte, ge, or vvti. (b) find a 1jz head and go 1.5jz, since i read somewhere that they flow better than the 2jz heads, can someone confirm this? or (c) get the existing head fixed?

so wether the non vvti GE bottom end is the same as the GTE's is of no use to me since ill have one that came with vvti..

but in the end you say the rods on the vvti model is weaker? and shouldent handle more than 400whp?

thank you again.

 

[RacerXJ220]

If you go n/a, don't go with a 8.5:1 compression ratio. I think you need to think about what you want, as the 1.5jz na is not going to make you happy at all. You might make 150whp? I dunno but it's going to be slower than a 7M-GE, that's for sure at the turbo comp ratio.

If you don't already have a 1JZ, gtfo and buy a 2JZ-GE and go to town. there's plenty of info on that engine, and everything you need to do to put it into a MK3. VVT-i is good NA.

Search more.

 

[neverknowsbest]

i wasnt planning on dropping the compression ratio on it unless i was going to turbo it and then only when i was ready to.

 

[supraracer49]

yea i know it wont, because to the best of my knowledge they dont have any vvti 1jz heads, but that was just another questions. not related to the vvti part.

They made a single turbo VVT-i 1jz motor but Im not sure if it was in a JZA70.