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Location:
Ipswich
Registered:
July 2002
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JZA70 Supra questions
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Thu, 30 January 2003 03:37
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Ok as most of u know my celica has gone to heaven.
Now i am really interested in getting a jza70 supra.
What i wanna know is does the 2jz swap over fairly easily?
I would presume it does. Also would it be better to do the complete 2jz or 2jz bottom end and make it a 1.5jz???
Anyone know where there is any jza70 supra for sale in good nick??
Brett.
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Location:
sunny coast, qld
Registered:
October 2002
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Re: JZA70 Supra questions
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Thu, 30 January 2003 04:03
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IMO i wouldn't bother swapping to a 2jz unless you want absolutely crazy HP! the 1jz is very strong as you probably know and can get some very good power with a single turbo kit. However, if you really want a 2jz, i would start with a 7m supra as these are much cheaper.
later
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Location:
Wollongong
Registered:
May 2002
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Re: JZA70 Supra questions
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Thu, 30 January 2003 04:12
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Why go the 2JZ route though ? Obviously it is *the* god of Toyota engines, but the 1JZ is a very capable and strong engine to begin with as well.
Look at it this way: Money spent on 2JZ conversion would be better spent on working the hell out of a 1JZ, and you'd have one hell of a 1JZ, instead of a stock 2JZ.
A front cut from a JZA80 Supra is gonna cost you megabucks (almost as much as a whole JZA70 probably), so I couldn't see the justification of going from a 1J to a 2J. Just my opinion though. If you were going from any other engine to a 2J, it would make more sense, but the 1J isn't that far behind a 2J.
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Location:
c'town, NSW
Registered:
May 2002
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Re: JZA70 Supra questions
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Thu, 30 January 2003 04:20
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| Soarer wrote on Thu, 30 January 2003 15:12 |
A front cut from a JZA80 Supra is gonna cost you megabucks (almost as much as a whole JZA70 probably
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this is an over exaggeration
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Registered:
May 2002
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Re: JZA70 Supra questions
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Thu, 30 January 2003 04:28
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The japs do a reasonably "common" conversion they nickname a 1.5J
Involves a bottom end swap. Maybe it'l be a bit cheaper and yield a good result - they seem to like it.
No more info - sorry.
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Location:
Brisbane
Registered:
May 2002
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Re: JZA70 Supra questions
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Thu, 30 January 2003 04:43
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Yeah, IMO it makes more sense to do a 1.5JZ conversion. That way you don't have to mess with your existing wiring, plumbing etc... just swap the bottom end and leave everything else as is. You can get brand new 2JZ bottom ends from Toyota, apparently they're around US$2k (haven't seen a local price for one yet).
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Registered:
May 2002
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Re: JZA70 Supra questions
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Thu, 30 January 2003 04:57
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Yep Norbie, heaps easier, and kinda gives a bit more value in buying a jza70 rather than a MA70.
A "brand new" 2j bottom end in Australia would be a Lexu$ not toyota part, and I wouldn't even like to guess the price!
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Location:
Brisbane
Registered:
May 2002
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Re: JZA70 Supra questions
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Thu, 30 January 2003 05:57
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stick with the 1j. the internals are good for 500hp at the wheels. if your really want a 2jz start with a 7mge powered supra they are the cheapest. or you could get an imported ga70, they are cheap to.
also im not 100% but i dont think the twin turbos of the 2j clear the mk3 fire wall, so you might have cough up for a single turbo kit as well.
im pretty sure the 1.5j is an american thing not japanese. japanese rarely do engine conversion etc.
a front cut jza80 will be at least $6000. then if you want the 6 speed extra mods to the trans housing have to be made. i dont think the r154 can hook up to a 2jz without alot of custom work. the w58 out of the jza80 is the tranny to use.
Toyota wanted over a grand for a 7m airflow meter, dont ask about a whole block. 
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Location:
Brisbane
Registered:
May 2002
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Re: JZA70 Supra questions
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Thu, 30 January 2003 06:37
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Whoa, lots of misinformation there!
- It doesn't make sense to buy an M-series Supra if you're going to put a JZ series engine in it. The JZA70 already has the correct transmission, flywheel, clutch, engine mounts, etc... you'd have to source all that stuff from somewherer else if you started with an MA70, and that ain't easy.
- The 2JZ turbos foul the firewall on LHD Supras. No such problem with a RHD body.
- The 1.5JZ is most definitely a Japanese thing. 1JZ's are almost unheard of in the US.
- The R154 will bolt up to a 2JZ with no modifications whatsoever, provided it has the 1JZ bellhousing. If you started with a JZA70 Supra, you'd already have one of those (hence my comment above).
- A W58 won't last long in such a heavy car with a 2JZ. Not a great idea, especially when an R154 is a bolt-in proposition.
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Location:
Ipswich
Registered:
July 2002
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Re: JZA70 Supra questions
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Thu, 30 January 2003 06:59
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OK I will only buy a jza70 supra I wont buy an ma70
I am just after upgradabilty options if i go get one.
Considering that they are the same series engines i just presumed that the 2jz would fit without too much problems.
But i would only consider this if i found a bargain 2jz.
Is there difference between na and turbo bottom ends???
I presume there would be.
Brett
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Location:
Perth Burbs
Registered:
May 2002
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Re: JZA70 Supra questions
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Thu, 30 January 2003 08:59
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If u wanna buy mine drop me a line at clg@iinet.net.au pretty good nic but ul have to ship it from WA.
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Location:
Ipswich
Registered:
July 2002
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Re: JZA70 Supra questions
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Thu, 30 January 2003 09:01
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got any pix and some info on it? boostzor???
SO far i have found that the jza70 seam to be cheaper than the ma70. Haven't found many of either tho.
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Location:
Perth Burbs
Registered:
May 2002
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Location:
Gold Coast
Registered:
May 2002
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Re: JZA70 Supra questions
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Thu, 30 January 2003 12:49
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It's simple really, You want a 1JZGTE in a Supra? GET A JZA70. Don't stuff around with a MA70 then getting a JZA70 frontcut. It's a %$#$ load of work!
turbokid, stop listening to the Americans, they are the the corrupt west snarl!
The 1.5JZ most certainly started in Japan. Infact if you visit a few JZA70 Fan sites in Japan alot of them are real fans of the Supra and do ALOT of there own work on the cars even in a shoe box they call a garage. Infact alot of the guys goto what is basicaly a community garage where you can pay to use the garage and work on your car.
Tell you one thing, the 1JZ started pretty much first go (once fuel filled the lines) and idled smoother and better than the 7M ever did! 
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I supported Toymods
Location:
south of the big smoke
Registered:
May 2002
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Re: JZA70 Supra questions
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Thu, 30 January 2003 13:06
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GT your goig to have to get rid of that avatar its distracting me from the posts
Wooo Wooo
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Location:
Ipswich
Registered:
July 2002
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Re: JZA70 Supra questions
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Fri, 31 January 2003 01:15
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Am definately searching now for a genuine jza70 supra with an auto (yeah i'm lazy).
So please keep eyes open for me ppl.
As long as it is in good condition anywhere on the east coast of australia is fine.
I will fly anywhere to pick it up.
Have my money in about 2 weeks.
Brett.
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Location:
Brisbane
Registered:
May 2002
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Re: JZA70 Supra questions
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Fri, 31 January 2003 01:49
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yeah sorry bout the missleading post
didnt realise the japs did block swaps and stuff. they have so much good gear from the factory they rarely need to do conversions and stuff. is it true that the stick with the 1jz head cause it flows better or is it just cheaper to do it that way.
i didnt think the r154 could bolt up to a 2j block, oh well thanks for clearing it up
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Location:
Brisbane
Registered:
July 2002
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Re: JZA70 Supra questions
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Sat, 01 February 2003 09:36
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I thought a 1.5jzgte was a 1JZ bottom end with a 2JZ head cuz the 2JZ head flows better...
So which one is it?
1jz bottom with 2jz head
or
2jz bottom with 1jz head
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: JZA70 Supra questions
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Sat, 01 February 2003 09:39
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2JZ bottom with 1JZ head. They keep all the stock 1JZ stuff, but its just as cheap to get a 2JZ block.
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Location:
Brisbane
Registered:
July 2002
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: JZA70 Supra questions
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Sat, 01 February 2003 09:54
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The whole point of the 2JZGTE is the way it doesn't have to rev as much to make the power. This is part of the reason they handle big power loads as they only rev to say 7000rpm instead of a RB26DETT revving to 9000rpm to make the same.
Also, the bigger displacement helps get bigger turbos making boost earlier.
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Location:
Brisbane
Registered:
May 2002
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Re: JZA70 Supra questions
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Sun, 02 February 2003 03:24
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The 1.5JZ mod is usually done to 1JZ's that are getting a bit tired. Apparently it's cheaper to buy a new assembled short motor from Toyota than it is to rebuild the old engine. And if a 2JZ short motor costs the same as a 1JZ, why wouldn't you slot that in and get yourself an extra 500cc for free?
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Location:
Ipswich
Registered:
July 2002
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Re: JZA70 Supra questions
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Sun, 02 February 2003 04:20
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Don't know the price of i 2jz bottom end brand new from lexus???
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Location:
NSW Engadine
Registered:
June 2003
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Re: JZA70 Supra questions
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Mon, 01 November 2004 04:52
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So from what I understand the JZA70 has a 1JZ and a MA70 has a 7M... Did some come factory with the 1JZ or is that just what they're called when they've been swapped to a 1JZ???
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Location:
Sydney
Registered:
February 2003
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Re: JZA70 Supra questions
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Mon, 01 November 2004 04:54
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a jza70 has a 1jz, hence the jz designation in the model number
ma70 has a 7m, hence the "m".
a jza70 is a factory toyota car, they came from the factory with a 1jzgte
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Location:
NSW Engadine
Registered:
June 2003
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Location:
Hobart
Registered:
August 2004
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Re: JZA70 Supra questions
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Mon, 01 November 2004 22:23
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na not really.. JZA70 are not that much more expensive.. But i THINK.. that they where released in 1991 which means u would have to wait till 2006 to import one then u would get a hell cheap one
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I supported Toymods
Location:
Perth, WA
Registered:
May 2003
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Re: JZA70 Supra questions
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Tue, 02 November 2004 02:31
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thats if the current import rules dont change!
or you could just buy a local one which is already rego'ed
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Location:
Hobart
Registered:
August 2004
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Re: JZA70 Supra questions
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Tue, 02 November 2004 02:54
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i really hope they don't.. wat r they going to change too if they do change ?
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I supported Toymods
Location:
Perth, WA
Registered:
May 2003
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Re: JZA70 Supra questions
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Tue, 02 November 2004 04:01
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maybe a 20year rule or a 30 year rule
and no i am not joking.
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Location:
wangaratta
Registered:
May 2004
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Re: JZA70 Supra questions
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Tue, 02 November 2004 23:05
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if such a 20 or 30 year rule did come in, they would make it hard as hell to get them in the country, because the government wants us all to drive new, or near new cars, because of emissions etc. . .
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