1JZGiTE Head swap onto 2JZGE block

[soarerflame]

Has anyone ever done this? How feasible is this type of swap. I know you still need turbo feed and return lines but still the 1JZ head supposedly flows better. I have come across a great deal on the 1JZ motorset (motor, tranny, wiring harnes) Its got no turbos but that means I can go use my current single and get a new manifold to fit everything. Also have to get new intercooler pipping to fit it all together. Please give me some info or direct me. Some suggestions would also be nice.

[Bean]

talk with brown duckz and got_trd... BOTH of them are going about this swap
its the same swap as the 2jz-gte block... its call the 1.5jz swap... only difference between the GE and GTE block in this aspect is needing the thicker headgasket and getting the oil and waterlines done properly...
its been done plenty of times in australia too

you can use MKIV TT intercooler piping and intercooler... and there's a 1jz single manifold floating on ebay all the time... its some guy that posts on clublexus or supraforums ( icant remember his name)

TONS of info in the MKIII section on supraforums under 1jz/2jz swap... just look for info on 1.5jz...
I also made a post on this very forum about the possibilities of the swap, and little did i know there were people secretly plotting to do it already :)

[soardrft]

bean told me about the 1.5 swap and after reading for about two hours i want to try it also. i have most parts just need the hg and timing i use the 2jz parts for that right? since its a single upgrade as well no problem with the lines correct? but do i need the 1jz wiring harness and ecu? does anyone have any numbers posted yet?

[Brown Duckz]

bean told me about the 1.5 swap and after reading for about two hours i want to try it also. i have most parts just need the hg and timing i use the 2jz parts for that right? since its a single upgrade as well no problem with the lines correct? but do i need the 1jz wiring harness and ecu? does anyone have any numbers posted yet?Basically you will retain the 1JZ head and EVERYTHING that controls the engine itself [ecu, harness, sensors]. None of this should be affected in increasing the displacement. I'm still unsure of exactly what is the best headgasket to use...... I'd guess a stock TT gasket, or aftermarket equivalent. Chino will beat me to it [more than likely], because he is one step ahead - he has the 1JZ installed. In my honest opinion, I think this may be a beast....... all the rev with 3.0 liters of displacement. We will see how it goes....... :fingersx:

[soardrft]

which hg are you going to use? i am starting to think it may be a good idea to go 1.5 since i have everything but the timing, hg, and ecu. its sounds like a day job. are there any sites that have this swap in detail? any pics of the finished product i saw one but it was a distance away. this would be very interesting to see done. to me atleast.

[Bean]

I will recommend the Boostlogic headgasket :) Its affordable and its a 2.5mm which offers 8.5:1 CR on a 2jz-GE block

the 1jz-gte and 2jz-gte have nearly identical combustion chamber volume from the head. Their CR is 8.5:1 and they both use the same pistons and rods... AND their stock headgaskets are interchangable. This means the headgaskets made to lower the compression of the 2jz-ge (hi compression because of slightly different pistons and thinner stock headgasket) will work with the 1.5jz project.

I wouldnt say this is a day job... more like a week job. Pulling motors is easy and usually takes a day (from prepwork to pull and clean) when you havent done a particular motor before. The part that takes the longest is stripping down both motors so you can switch the parts. (and prepping the 2jz-ge block)

EASY SUMMARY:
Buy a 1jz motor setup... do everything how the 1jz swap works on the SC... but instead you're prepping the motor first by swapping blocks and drilling a few lines. Use the 2jz-style timing belt since its setup for the taller deckheight of the 2jz block.

[got_trd]

Their CR is 8.5:1 and they both use the same pistons and rods...

I thought the 2jz-gte had a longer stroke, thus meaning the rods are longer?

[Bean]

I thought the 2jz-gte had a longer stroke, thus meaning the rods are longer?

nope, used to think this myself... but the part numbers are the same

the way the stroke length is obtained is that the 2jz block has a taller deckheight and a different crank (crank pushes the rods out farther away from the center to achieve a longer stroke)

Its been discussed in Supraforums MKIII section a few times, and I did a little research on the australian forums once to check into it even more

[Brown Duckz]

1.5JZ will own ALL. Join now or forever see my tail lights :thumbup:

[soardrft]

thanx for the input it seems like 1.5jz single turbo will work for me. just waiting on the manifold and hg. what holes do i need to drill in the 1jz head? i can start there and by the time the manifold comes in i should be ready. should i use the 1jz injectors or the 2jz injectors? i have the afc for minor tunning right now, but should i invest in the sc400 afm? thanx for the input guys makes this so much easier for me. does anyone know the torque on this motor setup?

[Bean]

You REALLY REALLY need to do some research before you do this, your responses here show that you arent prepared for this venture.

1) You dont need to drill into the 1jz head... its the BLOCK you need to setup for oil feed and oil return since the 2jz-GE doesnt come with those provisions.

2) Do you know the differences between 1jz, 2jz-gte (JDM AND USDM are different), and 2jz-ge injectors? 2jz-ge injectors are completely incompatible btw with the 1jz fuel rail. The 1jz-gte has sidefeed high impedance 370cc injectors. The JDM 2jz-gte has side feed high impedance 440cc injectors, and the USDM 2jz-gte has side feed low impedance 550cc injectors and utilizes a resistor box to keep their impedance high. All of the sidefeed varieties are interchangable... however, using the USDM injectors on the 1jz motor will require you to use the resistor box.

3) The 1jz-gte motor uses a MAP based system so using a SC400 AFM would get you absolutely nowhere because you wouldnt have a place to plug it in and the ECU wouldnt know how to handle the signal even if you did.
The 1jz map sensor is a 1 bar sensor while the JDM 2jz-gte map sensor is a 1.3 bar. It is said that one can use the JDM 2jz injectors and map sensor together and it will not require much tuning plus be a direct drop-in. The reasoning behind this is beyond the scope of this post, but its very similar to how the V8 AFM trick works on the 2jz-ge motor.

These are basic things one should already know about the 1jz.

got_trd, I think we need to have a 1jz basics thread

[Brown Duckz]

got_trd, I think we need to have a 1jz basics thread+1 to that.....

[soardrft]

i personally won't be doing the swap. that's why they have shops, however if i were to be approached by someone i want to have some knowledge of this swap instead of sitting around scratching my head. so before i suggest this swap to a shop i just needed a few things answered. just so me and others much like myself understand doing this swap is fairly easy to someone with knowledge. if i were to suggest this swap to the shop of my choice would i tell them:

use my 1jz
head
harness
ecu

use my 2jz
hg
bottom end
timing belt

the turbo fittings and feed lines would be custom due to the single turbo install so is that all that needed? if so it seems easy if you have all the parts already. sorry for my ignorance on this subject it just seems to good to be true. i had a 1jz before in my old sc and its just sitting collecting dust. can you guys please send me links about this setup so i may not ask any more questions? i am interested to see it actually installed. Thanx in advance.

[Bean]

Thats about right actually.