1jzgte into 4x2 RN90 spacecab info plz?

[JayZeeX83]

As the title says i'm doing a 1jz into my 4x2 rn90 space cab hilux. The old 22r shat itself and i always had plans to convert it from auto to manual plus i was looking to do something different to the usual SR/RB conversion and i wanted to stay Toyota... The 1j's out of a jzz30 soarer with a r154 box attached.

I'm after any info i can get for the main stuff like clearance issues, any engine bay mods needed, engine mounts (custom or substitutes), brake upgrades (because i don't want problems pulling up), sump front or rear (i have a front), wiring issues etc. I really dont want to chop anything if it can be avoided. Trying to do it right the first time.

I'm not after any crazy horsepower just around 200+/- because i know traction is going to be an issue, so the twins will stay. Just wanted something different and fun. Trying to be as sleeper as possible... So far i've bought the half cut and stripped the engine and anything that could possibly be used or sold to aid in the conversion. The engines out of the hilux as well as the tailshaft and the old auto box...

I've read through most of the threads involving this conversion but they're mostly done to earlier model hilux's, so the engine bays are a bit different. Any help is greatly appreciated cheers...

[2jzhilux]

You will need a rear sump, front sump will fit but needs to be modded to clear steering , will also have to custom make the mounts( not that hard), you will also need to set up your fuel system for efi either a surge tank lift pump and pressure pump or just do an intank pump.
I also needed a massive hammer to smash the firewall but i have a feeling the 1jz and r154 will fit easier than the 2jz auto im using so maybe no bashing needed.

I also think depending on how far back you want the motor your raer heater pipe will need modification, mine sits quite far back so i had mine modded.

I would probably go single turbo even if its a cheapy and just fab up a y pipe to make it fit just to clear up some space because it sure gets crowded.

[mick08]

I would say that you'l need to retain that front sump, i have done a 1uz into an RN90 and the sumps are almost identical to the 1jz, you will need to mod it slightly to clear the draglink but its minimal compared to a rear sump application in your chassis. You will have clearance issues for the radiator i would say as mine is pretty tight with 2 less cylinders in length,it has all been done before though so there is info about,i wouldn't use CRS for mounts or anything for that matter, guaranteed youl have probs and have to mod them(been there done that) They will tell you that the guy that used to do the mounts and stuff has left but they can still contact him, then they will send you mounts that don't fit and this will not only waste your time but when they tell you to send them back for mods your up for multiple freight charges and when you finally tell them to jam it they will only refund the purchase price, sux ass. The wiring side of things seems to be fairly basic and only about 6 wires to make them run, i do have some bits left over from my conversion, i basically did the opposite to you,i ripped out the 22r and 5speed and replaced it with a UZZ30 driveline(1uz V8 and A340 auto) so i've got clutch pedal assy, clutch master and slave cylinders and some other stuff if you need it.

[87lux]

If you keep the standard twin turbo setup you'll need to relocate the handbrake mechanism to behind the firewall or go with a floor mounted unit. rear sump setup will work nicely

[2jzhilux]

I'll try to get some pics tomorrow of my sump clearance with the rear sump with no modding needed.

I tried the front sump and when you mod it you end up with about 3/4 litre less oil capacity which i didnt like.

Keep in mind when making the mounts you want to keep a decent angle on the driveline or you will introduce all sorts of vibrations that shouldnt be there.
I measured the stock angle of the 22r and it sits at 4 degrees so you want to get it as close to that as possible.

I have 130mm clearance from the front of the motor to the radiator support here should be enough for a radiator im hoping.

[Demon]

Im droping a 1jz vvti into a 2004 single cab hilux. Iv got to the stage that iv sorted out the wireing and have bench run the motor with the stock ECU. Have read a few post of the guys talking about a tach cut from the rev counter to avoid over boost. Got it in a half cut and picked all the wires i needed from there but the only input i came across was the SPD from the multiplex to the ECU. There are no inputs on the pinouts with regards to this tach which the guys say it will not rev over 3000rpm and it will cut your ignition. Have you guys come across this ? The other thing is if I give the hilux a 30 mm body lift will the front sump work ? What clearence have you guys got ? Also not that crazy about the sump cut, would not like to run low oil. thanks

[Demon]

See you got sum good space infront. What made you smash the fire wall in ?

[mxracer92]

i done the same conversion 6 years ago . listen to what 2jzhilux says , as ive helped him with his build

where we mounted the motor so far back
1. to clear sump position
2. to get weight as far back as possible
3. more room for radiator / cooler etc

yes massage of firewall is required
stock twins i never used as i didnt wanna stuff around to make them fit.
i used a stock 7mgte single and it made 230rwhp at 15 psi. off a dodgey Y section manifold

pics of my build

phase1






phase 2

[Shifty]

haha i think that's the old manifold from my 1jz mx13!

[Demon]

Thats awsome. Your truck must be a wild thing on the road. The front sump would obviously not have worked out for you because of the low rider. What is your handiling and braking like? Myself im looking to keep it dead stock and run at around 280hp. Looking to put the JZX 100 chasers brake booster in and throw out the hiluxes, big size diffrence there. Want to run it with the auto box but also have to watch out for the gear ratios, I could find that it's a bit flat on pull away. I see you worked the fire wall a bit and it seems to have given you sum good space infront. What radiator have you stuck in there ? on my truck my flow lines are on the wrong sides. Also see you have done a huge intercooler there, im looking to go sumwhat smaller and drop it as low as possibel so that i dont block to much of the aircon and radiator. What fan did you go for ? Im looking at the bosch 3 stage fan but not sure if i will get it inbetween the motor and radiator, might have to go on the outside

[mxracer92]

haha i think that's the old manifold from my 1jz mx13!

. i built that manifold many many years ago and sold it to a "old toymods" forum member .. i sorta heard it got Whored around a bit .. but hey it did the job for what i needed

r33 4 spots and rotors almost bolt right on , i think there is a thread on here somewhere about hilux brake upgrade ( again 2wd model ) i used stock booster

radiator is stock jza70

thermo fans were 2x 12" davies craig

handling was not too bad . traction wasnt too bad either .. but i did have 20x10's with 295's on the rear .. i only did about 1500kms with the gt30 then sold it off .. the car was crashed into a pole not too long after i sold ..

[JayZeeX83]

Hey mxracer92 nice looking engine bay man! Hope mine looks like that eventually...
Quick question was there much stuffing around to convert to single setup? If so i might stick with the twins and just make them fit... Also what kind of hand brake setup did u swap to? How far back did u "massage" the firewall?
Cheers for all the help guys this is really clearing up alot of questions/worries I had

[mxracer92]

i never run the twin , so i have no idea on clearance . where my engine sat i doubt that the twins would fit at all ..

went single from the start . much less hassle clearance wise ..

didnt even need to touch anything with the handbrake

massage the firewall was just hitting with a hammer in the right area's it didnt need that much extra clearance , i just didnt want it to touch at all ..

remember i did this conversion back in 2002 think i sold it in 2004 so we're going back a while into my memory back

[2jzhilux]

I got stuck into mine with the hammer as i wanted it as far back as possible because it just saves hassles down the track with the radiator and fans.

I would honestly not stuff around with the twins for the price you could pick up a small internal gate single and a manifold for, stuffing around with the handbrake wouldnt be worth it.

[ra28_miles]

hey martin how come you got crap rep? Your 2jz JZX90 conversion is awsome. Now thats a car.

+1 rep mxracer92

Now i've seen a complete conversion kit that uses stock engine mounts on the hilux crossmember some where. I'm on holidays at the moment but i do have the link saved when i was searching around for 1jz parts. I'll be home again in a week.