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Location:
wollongong
Registered:
October 2002
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1j cressida
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Mon, 23 August 2004 00:45
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ok, i have read that u should only buy a jzx81 cut for the mx83 conversion but they seem to be very hard to come buy at the moment.
If i did use the jzx90, jzx100 or a 2j then is there heaps extra to do?
any other models bolt straight up mount wise?
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Location:
Brisbane
Registered:
May 2002
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Re: 1j cressida
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Mon, 23 August 2004 01:33
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| Chr!s wrote on Mon, 23 August 2004 10:45 |
If i did use the jzx90, jzx100 or a 2j then is there heaps extra to do?
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Yes, heaps. Wait for a JZX81 cut or you'll really regret it!
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Location:
Brisbane
Registered:
June 2003
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Re: 1j cressida
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Mon, 23 August 2004 03:44
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if you know how to weld, make your own brackets and mount and know someone who could fabricate you a new sump and oil pickup then theres not "that" much different.
Having said that, i know where there is a 1jz with a front sump..i dont think theyd seperate the sump and pickup though 
Blake
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Location:
Brisbane
Registered:
June 2003
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Re: 1j cressida
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Mon, 23 August 2004 03:47
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or alternatively, you could always buy the soarer/ supra one with mid sump, and do as much work fitting it as possible and then wait until a chaser one comes in and ask if you can swap them. I doubt many wreckers would think twice if a bit of cash was thrown in with the swap!
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Location:
Perth
Registered:
October 2002
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Re: 1j cressida
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Mon, 23 August 2004 04:38
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[quote title=Norbie wrote on Mon, 23 August 2004 11:33
Yes, heaps. Wait for a JZX81 cut or you'll really regret it!
[/quote]
Or, you could use the JZX90 with a manual gearbox and aftermarket ECU - not that hard.
Justin
JZA61
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Location:
Brisbane
Registered:
May 2002
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Re: 1j cressida
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Mon, 23 August 2004 05:14
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Of course it can be done that way, but after you've scrounged all the necessary parts, wired up your custom ECU and got it tuned on a dyno, it's cost you a lot more and taken shitloads more time than the practically bolt-in JZX81.
But hey, I'm just a lazy bastard, I always take the easiest route!
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Location:
Sydney
Registered:
May 2002
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Re: 1j cressida
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Mon, 23 August 2004 05:18
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conversion are pricks and not easy. anyone who has done one was definatly at the point that they wanted to torch it rather than finish it. if there is an easy route... go the easy route. dont make things harder for yourself.
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Location:
Brisbane
Registered:
May 2002
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Re: 1j cressida
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Mon, 23 August 2004 05:20
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Couldn't have put it better myself. 
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Location:
Perth
Registered:
October 2002
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Re: 1j cressida
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Mon, 23 August 2004 05:25
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| Norbie wrote on Mon, 23 August 2004 15:14 |
Of course it can be done that way, but after you've scrounged all the necessary parts, wired up your custom ECU and got it tuned on a dyno, it's cost you a lot more and taken shitloads more time than the practically bolt-in JZX81.
But hey, I'm just a lazy bastard, I always take the easiest route!
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Fair call But if you make the mistake of starting with a JZX90, then you're definitely better-off forgetting any bolt-in ideas. In fact, I'm about 80% sure than the auto requires an ECU (along with the 7 other ECU's throughout the frontcut) to control shifting - that is located BEHIND the rear passebger seat (ie, you probably won't get it with your half-cut!).
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Location:
wollongong
Registered:
October 2002
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Re: 1j cressida
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Mon, 23 August 2004 07:59
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the thing is, is that i can get a single turbo 1j engine package for a heap less than a jzx81 because all the importers know they can sell them so they are so expensive. AND hard to get!!!
if i got a jzx100 would the engine mounts be the main thing in the way?
how many computers to run that model?
im thinking:
jzx100 engine package (must have pwrst pump air cond etc)
make my own engine mounts (im confident in that)
custom intercooler
put it all in, got a auto electrician who can wire up power to computer, fuel speedo sensor etc...
gearbox shoould still bolt up fine
all im scared about if there is more than the two computers and anything else which would be different to the jzx81.
anyone?
trust me it is looking tempting considering the price for a older jzx81 compared to a newer and better jzx100...
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I supported Toymods
Location:
south of the big smoke
Registered:
May 2002
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Re: 1j cressida
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Mon, 23 August 2004 10:32
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does the jzx100 have a seperate engine loom like say the 1g? or is it like the 2jzgte??
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Location:
wollongong
Registered:
October 2002
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Re: 1j cressida
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Tue, 24 August 2004 03:01
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ive searched everywhere and made alot of phone calls and still no one yet can tell me if the jzx90 or jzx100 will be just as simple as a jzx81 to wire up. can anyone help?
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Location:
Brisbane
Registered:
July 2002
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Re: 1j cressida
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Tue, 24 August 2004 03:19
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id say the 100 would be a different or partly changed chassis(dont quote me though).. plus its also VVTI single turbo 1jz gte=exxy
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Location:
Adelaide, SA
Registered:
May 2002
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Re: 1j cressida
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Tue, 24 August 2004 03:34
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| Chr!s wrote on Tue, 24 August 2004 12:31 |
ive searched everywhere and made alot of phone calls and still no one yet can tell me if the jzx90 or jzx100 will be just as simple as a jzx81 to wire up. can anyone help?
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I'd say of course it won't be as simple - the jzx81 is the same body shape as the mx81 and as such would share a very similar body loom - something you won't find with the jzx90 or 100. A halfcut is almost ALWAYS preferable to an engine package, especially for the conversion you want to do was you can see how it all fits together in the halfcut, plus it provides all the little things you never thought you need but do! That's not to say a later generation 1jz wouldn't be good in the Cressida, but it's likely to have a larger degree of difficulty.
Find the wiring diagrams for mx81, jzx81 and jzx100 and check it yourself. If you think it's do-able, than go for it. Keep in mind that it's always the little things like air-con sensors, ABS sensors, connectiing the right inputs to the dash loom etc etc that are the biggest PITA.
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Location:
Brisbane
Registered:
May 2002
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Re: 1j cressida
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Tue, 24 August 2004 04:34
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JZX90/100 will have a similar level of complexity as my JZS147 Aristo frontcut, ie major headfuck. There were no less than 11 electronic modules attached to the loom, and all but one had to be painstakingly stripped out, one wire at a time, until I was left with the engine ECU and relevant wiring. Certainly not impossible but it's a BIG job, especially if you're not an experienced auto sparky (which I certainly am not).
Once again, I think you'd be nuts to do this with anything but a JZX81 frontcut. Why make an already difficult job ten times more difficult to get much the same result?
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Location:
wollongong
Registered:
October 2002
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Re: 1j cressida
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Tue, 24 August 2004 06:02
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a good point, and yes i can see why the jzx81 would be far easier.
two reasons why the 100 might be a good option for me personally: no 81 available for a couple of months at least and the 100 is a newer, better engine.
hmmm
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Location:
Adelaide, SA
Registered:
May 2002
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Re: 1j cressida
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Tue, 24 August 2004 06:11
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I'd go for the jzx100 engine if I had the time, energy and patience to muck around with it. You don't see too many of these engines around yet. But it's not the easiest way to go.
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Location:
Perth
Registered:
October 2002
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Re: 1j cressida
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Tue, 24 August 2004 06:50
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Just a few more thoughts to consider:
Conversions take a LONG time - even if you are getting lots of help from others. A couple of months wait for a JZX81? Keep that time in perspective with the conversion time and the many years you'll be happily driving your JZ for.
If you can get the JZX100 engine cheap enough, as someone in Perth did recently, then going aftermarket ECU and manual gearbox often isn't that much more than an over-priced JZX81 halfcut.
Either way, you're in for one ripper of a car!
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Location:
Brisbane
Registered:
May 2002
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Re: 1j cressida
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Tue, 24 August 2004 07:07
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One more thing: if you get a JZX100 cut, it won't be any easier (and probably no cheaper) than a 2JZ conversion. That being the case, why would you bother with the girly 1JZ? Be a man and get a 2JZ! 
Seriously though, the Aristo 2JZ is front-sump (no need to swap sumps) and is relatively cheap (less than $4k for a front cut). Makes sense to me, and the extra pain and expense over a JZX81 conversion will be justified by all that 2JZ POWAH.
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Location:
Brisbane
Registered:
July 2002
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Re: 1j cressida
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Tue, 24 August 2004 07:49
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| Norbie wrote on Tue, 24 August 2004 17:07 |
One more thing: if you get a JZX100 cut, it won't be any easier (and probably no cheaper) than a 2JZ conversion. That being the case, why would you bother with the girly 1JZ? Be a man and get a 2JZ!
Seriously though, the Aristo 2JZ is front-sump (no need to swap sumps) and is relatively cheap (less than $4k for a front cut). Makes sense to me, and the extra pain and expense over a JZX81 conversion will be justified by all that 2JZ POWAH.
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when was the last time u checked that price?.. last i searched they went from 6k
and thats only auto
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Location:
Brisbane
Registered:
May 2002
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Re: 1j cressida
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Tue, 24 August 2004 08:08
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This was 2-3 weeks ago. Prices vary greatly, you have to shop around! Also be aware that quoted prices don't mean much; if you wave a wad of cash in their faces they'll usually take it (within reason of course).
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Location:
On your mum!
Registered:
May 2002
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Re: 1j cressida
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Tue, 24 August 2004 08:35
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Wow, plenty of discouragement for the 1J vvt here.
I have embarked on the JZZ30 vvti into the missus cressida - I realise that it will be tough - but I think it will be worthwhile.
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Location:
Canberra
Registered:
May 2002
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Re: 1j cressida
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Tue, 24 August 2004 08:49
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Just my 2 cents worth, The JZX100 1JZ-GTE VVTi was relativly easy to install electrically. I modded the existing car loom (RA23 Celica) for Starter/Alternator/Water temp/Oil pressure and Ignition. The Computer plugged into the loom, and a few wires from/to the computer to power up Computer, Circuit opening
relay, and Fuel pumps.
regards Chuck.
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Location:
On your mum!
Registered:
May 2002
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Re: 1j cressida
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Tue, 24 August 2004 08:54
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Chuck - are you running manual or auto?
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Location:
Canberra
Registered:
May 2002
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Re: 1j cressida
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Tue, 24 August 2004 10:03
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Hi Jason, manual- JZA-80 non turbo bellhousing, mated to a W58.
It would be a little extra work to hook up the Auto, but not insurmountable. The engine package I got, came with full loom and Auto/Engine Computer. From what i could see, there would have been a couple of speed sensor wires required to make the auto work properly. These wires and their outputs, have been covered on these forums.
regards Chuck.
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Location:
Brisbane
Registered:
July 2002
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Re: 1j cressida
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Wed, 25 August 2004 04:39
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| Norbie wrote on Tue, 24 August 2004 18:08 |
This was 2-3 weeks ago. Prices vary greatly, you have to shop around! Also be aware that quoted prices don't mean much; if you wave a wad of cash in their faces they'll usually take it (within reason of course).
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ahh ok.. cause my front cut which was a jzz30 soarer one
was auto.. but i got a deal
so for 4k i got
1jz gte
r154 geearbox with everything to make it bolt on(but needed new clutch)
front sump
and a 1g gte intercooler(which i sold)
then sold all suspension off for 400 i think
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