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Toymods » Tech & Conversions » 1JZ MX83 Cressida.... questions... ?? Show: Today's Posts  :: Show Polls  Email to friend

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BabyZ Regular Location: Armidale Registered: January 2003	Re: 1JZ MX83 Cressida.... questions... ?? Mon, 02 August 2004 07:16 I am in the process of doing exactly the same conversion. However, I am a step ahead of you, as I already have a JZX81 half cut sitting in the shed 1. Am I chasing preferably a JZX81 or JZX90 Chaser 1/2cut? I would recommend a JZX81, if you can get one in good nick. These are (mechanically) a bolt-in swap for the MX83. Literally a weekends work. JZX90/100 are more likely to be a good motor, but there is more work to be done getting them to fit (cut/weld engine mounts, etc IIRC). 2. Do I swap the complete Chaser ECU&Loom into the cressida? Is this relatively easy to do - by someone qualified to do it? Yes and no - the chaser loom (JZX81) will nearly plug into the MX83. You need to remove (unpin) 2 of the plugs that interface to the body loom, and repin them into the corresponding plugs salvaged from the Cressida loom. The other plugs need repinning too. Following the wiring diagrams should enable you to do this yourself, judging by the level of competence you have expressed. PM me if you have trouble tracking down some diagrams. That being said, I am still seriously undecided as to whether I will do mine myself or hand it to an expert with a cheque for $600!! 2a. I plan to upgrade to an aftermarket ECU at a later date - should I just got aftermarket ECU first time? No benefit that I can see - make it cheap'n'easy for now, once it is running ok, start fiddling 3. Will I need to swap the 7m g/box speedo sensor into the 1jz g/box? Sort of - I assume your MX83, like mine, has a mechanical speedo. Use the MX83 speedo cable in place of the JZX81 electronic sensor. The speedo itself has a pulse generator that you can feed back into the ECU - via SP1 in the wiring loom. 4. I have a 1 piece tailshaft (I've replaced the stocko as it too died), will it bolt straight up with the 1jz auto? Probably - I have been told that the stock tailshaft will bolt straight up, so assuming yours is the same length, it should be fine. 5. Will the g/box crossmembers line up? Should do, if not the one from the half-cut will be a bolt-on for the MX83. 6. Will the stock fuelpump be upto the task of supplying fuel? Barely. I ordered a high pressure 255 ltr/hr Walbro unit from the USA - should cost you under AUD$200 landed here, and it is a straight swap for the in-tank pump in the MX83. PM me for details if you need them. 7. Is there anything else I'm not considering? Probably, but nothing major that no-one else hasn't mentioned. I suspect your hardest part will be finding a decent JZX81 half cut. That being said, CelicaMad was selling a pranged cressida with a 1JZ in here very recently - would be an ideal and reasonably economical option for you. Take a look: http://forums.toymods.org.au/index.php?t=msg&t h=40296&start=0&rid=&S=c3798c8bc64569c bf1b3b2f2a68c392e Cheers. Another snippet f info I've found is this: ..basically, if you buy a 1JZ front cut from the equivalent Chaser, then all you need to do is use the chaser loom. apparently in the 7MGE cressida (MX83??) the loom is a direct plug in swap. Can anyone prove/disprove this comment? Dunno about disprove, but it sounds mighty optomistic to me The brakes have recently been replaced, same with the radiator. Pity - the half cut should come with another radiator, but no reason not to use your newer one. Similarly, the brakes on the JZX81 are being bolted into my MX83 - bigger pads and rotors can't hurt! How does the aircon/power steering etc bolt up??? Any problems? Looks like an easy-peasy mix-and-match job to me, apparently the plates from the cressida hoses will fit the chaser A/C comp, or you can switch over all the chaser gear which will be R134A, rather than the Cressidas adapted gear. The JZX81 power steering has a solenoid, apparently for speed sensitivity or something. There is a box under the ECU that looks like it controls it, but I haven't quite figured that out the wiring yet - I reckon I'll move it over as a unit and see what happens! The Chaser crossmember should bolt right in? Same with the gearbox x-member or will this need fabricating? Will all fit just fine. You will be amased at how 'identical' the two cars are when you sit the JZX81 next to the MX83! That'll do from me for now!! There is probably more, so ask away if you feel the need. Disclaimer - my conversion is a work in progress, so some bits are 'hard fact' while the rest are 'pretty rigid', cos I've researched them thoroughly and confirmed as best I can with the MX83 and the JZX81 sitting in front of me! Cheers, Adam. [Updated on: Mon, 02 August 2004 07:47] [Report message to a moderator]

	Subject	Poster	Date
	1JZ MX83 Cressida.... questions... ??	Sunny310	Sun, 01 August 2004 03:05
	Re: 1JZ MX83 Cressida.... questions... ??	SIMDOG	Sun, 01 August 2004 03:27
	Re: 1JZ MX83 Cressida.... questions... ??	Sunny310	Sun, 01 August 2004 03:35
	Re: 1JZ MX83 Cressida.... questions... ??	SIMDOG	Sun, 01 August 2004 06:17
	Re: 1JZ MX83 Cressida.... questions... ??	samdowning	Sun, 01 August 2004 11:27
	Re: 1JZ MX83 Cressida.... questions... ??	Southo	Sun, 01 August 2004 07:53
	Re: 1JZ MX83 Cressida.... questions... ??	samdowning	Sun, 01 August 2004 11:32
	Re: 1JZ MX83 Cressida.... questions... ??	SIMDOG	Sun, 01 August 2004 11:41
	Re: 1JZ MX83 Cressida.... questions... ??	cseufert	Sun, 01 August 2004 11:51
	Re: 1JZ MX83 Cressida.... questions... ??	sideshow	Sun, 01 August 2004 13:05
	Re: 1JZ MX83 Cressida.... questions... ??	Sunny310	Mon, 02 August 2004 00:39
	Re: 1JZ MX83 Cressida.... questions... ??	BabyZ	Mon, 02 August 2004 07:16
	Re: 1JZ MX83 Cressida.... questions... ??	cseufert	Mon, 02 August 2004 09:48
	Re: 1JZ MX83 Cressida.... questions... ??	BabyZ	Tue, 03 August 2004 09:18
	Re: 1JZ MX83 Cressida.... questions... ??	BabyZ	Tue, 03 August 2004 10:44
	Re: 1JZ MX83 Cressida.... questions... ??	sideshow	Mon, 02 August 2004 13:20
	Re: 1JZ MX83 Cressida.... questions... ??	sideshow	Tue, 03 August 2004 10:09
	Re: 1JZ MX83 Cressida.... questions... ??	sideshow	Tue, 03 August 2004 11:01
	Re: 1JZ MX83 Cressida.... questions... ??	Southo	Tue, 03 August 2004 14:46
	Re: 1JZ MX83 Cressida.... questions... ??	SkiDMaN	Wed, 04 August 2004 00:28
	Re: 1JZ MX83 Cressida.... questions... ??	Norbie	Wed, 04 August 2004 00:46
	Re: 1JZ MX83 Cressida.... questions... ??	Sunny310	Wed, 04 August 2004 04:01
	Re: 1JZ MX83 Cressida.... questions... ??	Norbie	Wed, 04 August 2004 04:37
	Re: 1JZ MX83 Cressida.... questions... ??	SkiDMaN	Wed, 04 August 2004 04:04
	Re: 1JZ MX83 Cressida.... questions... ??	CrAiGzEE	Wed, 04 August 2004 06:16
	Re: 1JZ MX83 Cressida.... questions... ??	SkiDMaN	Wed, 04 August 2004 06:27
	Re: 1JZ MX83 Cressida.... questions... ??	Sunny310	Wed, 04 August 2004 07:38
	Re: 1JZ MX83 Cressida.... questions... ??	SkiDMaN	Wed, 04 August 2004 07:43
	Re: 1JZ MX83 Cressida.... questions... ??	sideshow	Wed, 04 August 2004 09:37
	Re: 1JZ MX83 Cressida.... questions... ??	Grant	Fri, 06 August 2004 05:33
	Re: 1JZ MX83 Cressida.... questions... ??	BabyZ	Sat, 07 August 2004 02:01
	Re: 1JZ MX83 Cressida.... questions... ??	Grant	Sat, 07 August 2004 22:26
	Re: 1JZ MX83 Cressida.... questions... ??	cseufert	Wed, 11 August 2004 13:46
	Re: 1JZ MX83 Cressida.... questions... ??	sideshow	Wed, 11 August 2004 22:57
	Re: 1JZ MX83 Cressida.... questions... ??	manmx83	Thu, 02 September 2004 17:32
	Re: 1JZ MX83 Cressida.... questions... ??	sideshow	Thu, 02 September 2004 23:10
	Re: 1JZ MX83 Cressida.... questions... ??	SoarerFury	Thu, 02 September 2004 23:40

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