Questions about the 1jz motor

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vash_vts

New Member
Dec 24, 2005
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St. Louis
Hey,
I used to have an 88 7m-gte, which i ended up spending an arm and a leg to re-hab, so i had to sell the car, and i am looking to get another MKIII b/c i love them so much. Now I know i'm going to do a 1jz swap, but i just need a few questions answered first. What is the general strength of this motor ie: when is a good time to forge, and sleeve the block? What is the difference b.t a "soarer" type motor and a regular 1jz-gte? Are the 1jz's as strong as the 2jz's from the factory? To be honest i think thats what i want to know the most! What will i need for this swap besides, ecu, wiring, tranny, motor, turbos, exhaust, and intakes? Also, i'm shooting for a modest 500whp on this engine, what would be the most critical parts needed to modify? I have my own tuning shop so getting the parts is not the issue, i just have no personal experience with the 1jz, and have never taken the time to learn about it! Thanks for the help in advance!
and MERRY XMAS!
-Ryan
 
ToyoHabu

ToyoHabu

New Member
Jun 25, 2005
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Huntsville, Alabama, United States
CC for CC the 1JZ is as strong as the 2JZ so 500 HP will not be a problem. Just dont boost above 23 PSI on stock HG. The number I hear most is about 6-700 HP on stock internals. You will of course hace to upgrade fuel and air delivery and exhaust to see 500.
 
V

vash_vts

New Member
Dec 24, 2005
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St. Louis
^^^ of course, so internals are not the issue its the head gasket on these, wow 23psi, blows away the stock gasket on the 7m's! Ok, next question, is it worth the extra cash to go 2jz instead of 1jz, or would that just be extra money and wiring for no reason? Also do you know what the peak effeciency of the turbo chargers are?
 
ToyoHabu

ToyoHabu

New Member
Jun 25, 2005
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Huntsville, Alabama, United States
You will find that there are more Upgrades and spare parts laying around for the 2JZ compared to the 1JZ. The initial outlay will be less for the 1jz but when you start looking for go fast parts the 2JZ starts to win.

typically engine ecu harness + tranny will go 1jz $1500- $2000, 2jz $4000-6000 with front cuts going for about $1000 more
 
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vash_vts

New Member
Dec 24, 2005
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St. Louis
Yeah i figured that much, who makes forged pistons, cranks, and rods for the 1jz? Anyone know? Plus, getting performance parts isnt a problem and customs fabrication isnt a problem either, I'm just worried about things like internals, and engine management software. Who are you guys using for engine management? Who makes cams for the 1jz? And what is the highest revs you guys would ever build the 1jz to take?
 
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suprastanger507mgte

2x88+2x89+1x91+2x92=ME
Apr 5, 2005
3,148
6
38
Hayward , Ca
vash_vts said:
Yeah i figured that much, who makes forged pistons, cranks, and rods for the 1jz? Anyone know? Plus, getting performance parts isnt a problem and customs fabrication isnt a problem either, I'm just worried about things like internals, and engine management software. Who are you guys using for engine management? Who makes cams for the 1jz? And what is the highest revs you guys would ever build the 1jz to take?
Click to expand...

Actually i have just turned to 1jz recently and I just love it.
It is an aweome engine no doubt and loves to rev.

The parts are not that hard to find. If you are looking for internal parts, try one of the sponsors on this site .
I know that Driftmotion.com has internal parts as well as Ijz Bell housing if you need that to mate your r-154.

Crower and HKS also makes the cam.
A few guys have used the 2jz wiring diagrams to run AEM as a stand alone.
Most are also using the E-mamage Ultimate / emanage blue/ safc to to tune, but the emage and AEm works best.

I lot of guys are also going with singal turbo setups for high horsepower as well.
 
S

suprastanger507mgte

2x88+2x89+1x91+2x92=ME
Apr 5, 2005
3,148
6
38
Hayward , Ca
vash_vts said:
Yeah i figured that much, who makes forged pistons, cranks, and rods for the 1jz? Anyone know? Plus, getting performance parts isnt a problem and customs fabrication isnt a problem either, I'm just worried about things like internals, and engine management software. Who are you guys using for engine management? Who makes cams for the 1jz? And what is the highest revs you guys would ever build the 1jz to take?
Click to expand...

Some info here as well :

http://www.jza70.com/articles/faq/index.html#q2
 
drunk_medic

drunk_medic

7Ms are for Cressidas
Apr 1, 2005
574
0
0
Woodstock, GA
There is a decent alternative - 1.5JZ. Just get a new 2JZ shortblock from Toyota and put it under that 1JZ head!

I think a 2JZ would be better, though - can't easily get new 1JZ parts in the USA, and if you are wanting to push out some power, things are going to break.
 
V

vash_vts

New Member
Dec 24, 2005
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St. Louis
well right now im considering just getting a rhd clip and welding it to the front of a usdm supra, t'would save alot of wiring time, and fuck who doesnt want a rhd car?
 
drunk_medic

drunk_medic

7Ms are for Cressidas
Apr 1, 2005
574
0
0
Woodstock, GA
vash_vts said:
well right now im considering just getting a rhd clip and welding it to the front of a usdm supra, t'would save alot of wiring time, and fuck who doesnt want a rhd car?
Click to expand...

Right-handed people?
People who don't want a hassle any more than the swap already can be?
People who want to be able to get dash, console and shifter surround parts from a local junkyard instead of online or overseas?
 
T

Troyota

I Love What You Do For Me
Jul 28, 2005
243
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44
Roswell NM
Uh...there are better (safer, cleaner) ways to make your car RHD than to chop your car in half and weld the JDM clip in it's place...all you need is the firewall, then swap all the RHD stuff from the clip to your car...I'm brought back to the episode of "Pimp My Ride" where they had that one Ford Escort that was like 3 different cars JB Welded together. Either way, if you think you won't have wiring issues w/ either option...I think you're wrong.
 
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vash_vts

New Member
Dec 24, 2005
9
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0
St. Louis
i was just kidding about welding the jdm front clip to the usdm front clip! but getting parts and what not like i've said is not a problem, all my suppliers are in Japan so even if i need some basic stuff i can still get it fairly easy, plus this car will only be my weekend car. So i think having it as rhd would be pretty sweet, i've always wanted a rhd car you know so that when i come home i can get the mail out of the mail-box with-out facing the wrong way in the street and what not!

Anywho, what extra (besides like 3 grand) does it take to swap in a 2jz? Also will the Getrag 6-speed bolt up to the 1jz? I figure you'll need a special fabbed drive shaft, 2jz flywheel, 2jz motor mounts, and shifter. What else would it need.

Also how much did the 1jz swap end up costing you guys in the end? And do you think it was worth it to get rid of the 7m?

Is it even possible to put a 1jz head on a 2jz? I thought that was all myth and what not?
 
drunk_medic

drunk_medic

7Ms are for Cressidas
Apr 1, 2005
574
0
0
Woodstock, GA
I don't know, man.. the way I see it, if you are putting a 2JZ in, you might as well upgrade any questionable components.
You aren't going to be using the 7M intercooler, and it would be dumb to adapt the 2JZ SMIC, so you might as well get an aftermarket upgraded front mount and all of the nice custom piping to go with it.
With that piping, you'll probably want a blow-off valve while you are at it.
Then there's cooling - might as well get a radiator.
Gonna need a fuel pump, whether it's a 2JZ's or a Walbro.
Motor mounts
Flywheel
Bellhousing
A decent clutch, for the love of all that's holy!
Custom downpipe
3"-3.5" exhaust
Might as well buy an intake, boost controller and boost cut controller while you are at it!
I would also suggest a USDM 2JZ, as it's better for BPU upgrades out of the box. You can also spend some cash and convert a JDM [cheaper] 2JZ to a USDM 2JZ, but that can get pricey!
You are also going to need preventative maintenance items - bits and pieces like oils/fluids, spark plugs, oil and fuel filters, and a new o2 sensor would be a good idea.


A 2JZ swap might ask for Benjamins in the beginning, but if done right can yield more than 400rwhp at BPU levels to start with and it won't nickle and dime you to death like many 7M stories we've heard.

The 1JZ head on a 2JZ block is no myth, my friend. They share some common components, including headgaskets. Same bore and bore spacing, different stroke. Take 6 coke cans and stand them up in a straight line. Imagine that's a 1JZ. Now imagine the cans magically growing almost another inch in height. That's the 2JZ.
I believe the block height of the 2JZ is 20mm higher, but someone else may be able to correct me on that one.
 
V

vash_vts

New Member
Dec 24, 2005
9
0
0
St. Louis
Trust me i know ALL about the 7m nickle and diming to death. See none of those stock components were going to stay anyways, cant have a project car with stock components! Right now im calculating the costs of and benefits of converting to a 2jz, to figure out how much everything is going to cost me to be where i want to be. I only need like 500 whp, b/c anything higher than that ends up costing way too much in the long run to not only maintain but every single part ends up having to be replaced. I'm not looking for a record-breaking supra (at least not right now) b.c well quite frankly i beleive the supra has been pushed to its limits already as far as power goes, and i think its retarded to spend 25g's trying to get 1000+ hp for a car you can't even drive! Anywho, so yes im only going for 500whp, and maybe even 700whp at the absolute max, plus i'm a person who has to have their car handling good, so i'll end up spending about 4 g's in suspension already. Is the 2jz going to be that much cheaper up at 700whp than the 1jz? and if so what do you base this on?
 
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