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Location:
Sydney
Registered:
March 2003
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JZA70 Supras
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Fri, 02 September 2005 03:42
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Hey Guys, sorry if this has been covered before, but what are the main weakness' of the JZA70? Do they all come with LSD? What is the handling like? What power will break the R154??
Cheers!
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Location:
Forrestfield, WA
Registered:
August 2002
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Re: JZA70 Supras
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Fri, 02 September 2005 04:04
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my stock one has broken my r154 twice.
had it fully rebuilt (bearings seals and common failing syncros)
first time was the 1st gear thrust washer disintegrated
second time has wild gridning knock noise when its out of gear
had it stripped and reassembled guy cant fault it but it still makes noise
first time was using redline MTL, second time was Shell synethic. Got shockproof in it atm ($140 ouch). still drives fine just has wild grindy noise out of gear. inspected clutch its fine, put new spigot bearing (pull bearing was fine) still makes it... god knows
- Russ
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Location:
Sydney
Registered:
March 2003
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Re: JZA70 Supras
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Fri, 02 September 2005 04:10
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damn, thats not good news at all Russ. What power you running?
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Location:
Canberra, ACT
Registered:
May 2002
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Re: JZA70 Supras
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Fri, 02 September 2005 05:10
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| KOFFEE-BLACK wrote on Fri, 02 September 2005 13:42 |
Hey Guys, sorry if this has been covered before, but what are the main weakness' of the JZA70? Do they all come with LSD? What is the handling like? What power will break the R154??
Cheers!
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The R154's in general are actually quite strong. I can't give you a "break" figure, but I'd say, judging from the size of it, and Toyota's tendancy to over engineer, I'd say it would be pretty high. Synchro's are definately one of their weaker points, I also think it is the thrust (???) bearing as which can also be an issue.
That being said, I'm putting out 193rwkw, and although my 154 is notchy (like every other one I've ever driven), it hasn't deteriorated in the time I've had the car. Maybe I don't drive the car hard enough 
I know on the Aerotops, LSD was an option. But I think on the hardtops LSD was standard (not 100% on this). Standard handling isn't terrible, although I have read a few people complaining that it can be a bit soft at times. Either way, the suspension is going to be a bit weathered if you're looking at those ones from prestige.
That being said, I love my JZA70, it goes fast (enough), sounds so sweet, has a nice and comfortable interior, and once my coilovers are in, will handle better and I'll love it even more! 
Hope this helps
Cheers
[Updated on: Fri, 02 September 2005 05:15]
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Location:
Forrestfield, WA
Registered:
August 2002
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Re: JZA70 Supras
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Fri, 02 September 2005 05:14
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stock except for exhaust and pod filter and linked wastegates (runs 14-15psi).
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Location:
Sydney
Registered:
March 2003
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Re: JZA70 Supras
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Fri, 02 September 2005 05:40
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| poombah wrote on Fri, 02 September 2005 15:14 |
stock except for exhaust and pod filter and linked wastegates (runs 14-15psi).
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Russ, do you use your clutch at all man??
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Location:
Sydney
Registered:
September 2003
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Location:
Sydney
Registered:
March 2003
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Re: JZA70 Supras
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Fri, 02 September 2005 05:54
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thanks for that smt.
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Location:
Campbelltown
Registered:
November 2003
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Location:
Central Coast, NSW
Registered:
February 2005
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Location:
c'town, NSW
Registered:
May 2002
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Re: JZA70 Supras
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Fri, 02 September 2005 06:13
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yeah S is direct injection petrol
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Location:
Central Coast, NSW
Registered:
February 2005
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Re: JZA70 Supras
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Fri, 02 September 2005 06:22
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sweeeet.
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Location:
Sydney
Registered:
March 2003
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Re: JZA70 Supras
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Fri, 02 September 2005 07:07
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So only the R has LSD fellas?
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Location:
Campbelltown
Registered:
November 2003
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Re: JZA70 Supras
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Fri, 02 September 2005 07:09
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| KOFFEE-BLACK wrote on Fri, 02 September 2005 17:07 |
So only the R has LSD fellas?
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according to the website i posted the link to they all have LSD's 
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Location:
Sydney
Registered:
September 2003
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Re: JZA70 Supras
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Fri, 02 September 2005 07:26
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| KOFFEE-BLACK wrote on Fri, 02 September 2005 17:07 |
So only the R has LSD fellas?
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Limited also has the lsd standard, you have a good chance of having the lsd, because it has a sunroof, and i dought they would put a big single turbo, wastegate etc etc into a non lsd supra. Try findout by asking  .
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Registered:
October 2004
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Location:
Forrestfield, WA
Registered:
August 2002
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Re: JZA70 Supras
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Fri, 02 September 2005 08:58
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err yes of course i use my clutch...?
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Location:
Bunbury, W.A.
Registered:
January 2005
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Re: JZA70 Supras
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Fri, 02 September 2005 10:25
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My old JZA70 R was a tops car, if I was going to go for a JZA70 again I would definately go for a 'R' model, for the extrea things (LSD, recaro's, bilstein suspension etc) it is much better.
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Location:
Forrestfield, WA
Registered:
August 2002
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Re: JZA70 Supras
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Fri, 02 September 2005 12:11
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for cars of this size and weight you need AT LEAST some angry springs and swaybar kit and a rear strut brace... recommend coilovers and swaybars at a minimum.
ive got front/rear cusco braces, front/rear whiteline swaybars, tein HR's with some really angry springs, JIC adjustable wishbones and its not too bad... cos its a targa model theres still a bit of flex in it.
Suprasport.com have some nifty rear cross brace for hte rear hatch to strengthen that.
I have a Safety21 6 point cage that i havent put in which would strengthen it more but it doesnt fit targa model without modification 
- Russ
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Location:
Melbourne
Registered:
November 2003
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Re: JZA70 Supras
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Fri, 02 September 2005 14:34
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I wonder if you could get a bar welded/bolted in from the top of the windscreen to behind the aero? This is something I've allways pondered with the *A70 and JZA80. This would essentialy make it a targa top, and hopefully reduce some of the chassis twist. For regulations purposes you'd probably have to have it padded.
Anyone know if this would significantly reduce twist? Has anyone tried it?
I guess I should make my own thread actualy. Perhaps later.
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Location:
Canberra, ACT
Registered:
May 2002
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Re: JZA70 Supras
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Sat, 03 September 2005 03:20
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| Shraka wrote on Sat, 03 September 2005 00:34 |
I wonder if you could get a bar welded/bolted in from the top of the windscreen to behind the aero? This is something I've allways pondered with the *A70 and JZA80. This would essentialy make it a targa top, and hopefully reduce some of the chassis twist. For regulations purposes you'd probably have to have it padded.
Anyone know if this would significantly reduce twist? Has anyone tried it?
I guess I should make my own thread actualy. Perhaps later.
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I've recently been told that those kind of braces do exist. A few US guys use them. Would definately be good to see some pics.
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Location:
Sydney
Registered:
March 2003
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Location:
c'town, NSW
Registered:
May 2002
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Re: JZA70 Supras
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Sat, 03 September 2005 03:57
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bro how many JZA70's are u buying? theres like 50 of them
just choose the 1st on in the pic 
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Location:
Sydney
Registered:
March 2003
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Re: JZA70 Supras
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Sat, 03 September 2005 04:02
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huh?? that is 1 car man haha
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Location:
Perth
Registered:
June 2002
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Re: JZA70 Supras
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Sat, 03 September 2005 04:30
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i would suggest u talk to a few people that have imported though that company, before u lay down any money
rOss
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Location:
Perth
Registered:
October 2003
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Re: JZA70 Supras
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Sat, 03 September 2005 06:33
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That one has LSD.
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Location:
Forrestfield, WA
Registered:
August 2002
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Re: JZA70 Supras
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Sat, 03 September 2005 08:45
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i have a set of bars i got from suprasport.com, they bolt in when you remove the roof to keep it rigid.
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Location:
Sydney
Registered:
March 2003
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Re: JZA70 Supras
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Sun, 04 September 2005 02:32
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| Rossco wrote on Sat, 03 September 2005 14:30 |
i would suggest u talk to a few people that have imported though that company, before u lay down any money
rOss
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Hey, thanks for that. I did do a bit of research, they seem good, but seem to be a bit more exp, if i go and do it from the smaller guys. Thing is, this car is on prestige's site, do I HAVE to go through prestige?
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Location:
Sydney
Registered:
March 2003
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Re: JZA70 Supras
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Sun, 04 September 2005 02:34
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| Skip wrote on Sat, 03 September 2005 16:33 |
That one has LSD.
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Skip, how the fark do you know? You cant even see the Diff!
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Location:
Kelmscott, Perth, W.A
Registered:
March 2004
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Re: JZA70 Supras
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Sun, 04 September 2005 10:09
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http://www.toyota-supra.info/models/1991_8/ - this site owns the other 2.
jza70 flavours...
2.5GT Twin Turbo
2.5GT Twin Turbo Aero Top
2.5GT Twin Turbo Limited
2.5GT Twin Turbo Limited Aero Top
2.5GT Twin Turbo R
the last 3 models come STANDARD with torsen LSD.
the first 2 models are OPTIONAL.
the supra your looking at buying is the first model (i.d plate is clearly visible in those pics and you can reference the chassis code on that website i posted. therefore it is unknown wether it is equipped with the torsen or not, but in all seriousness who would set the car up like that w/o a LSD???
chances are it has the LSD.
its also got the optional sunroof.
as for common faults... they're not that much different to any other car with its faults... that being said people have problems with...
power steering pump and rack
water pump
harmonic balancer
valve stem seals
smokey/fragile turbos
water leaks in rear end
notchy R154 (good for more HP than most people have)
air leaks window seals
leaky aerotop
heater system failing
cant think of anything else atm im sure there is a lot more.
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Registered:
August 2002
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Re: JZA70 Supras
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Sun, 04 September 2005 10:19
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| KOFFEE-BLACK wrote on Sun, 04 September 2005 12:32 |
Thing is, this car is on prestige's site, do I HAVE to go through prestige?
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No.
John, Importbitz, do it.
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Location:
Melbourne
Registered:
November 2003
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Re: JZA70 Supras
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Sun, 04 September 2005 11:01
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| poombah wrote on Sat, 03 September 2005 18:45 |
i have a set of bars i got from suprasport.com, they bolt in when you remove the roof to keep it rigid.
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Can you keep them in while the roof is on? Or do you have to bolt them up after you take the roof off?
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Location:
Melbourne
Registered:
May 2002
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Re: JZA70 Supras
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Sun, 04 September 2005 14:03
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thats a great car im shure its never be thrashed in its life! lucky as A70 driveline parts are so cheap!
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Location:
Northwestern Sydney
Registered:
August 2002
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Re: JZA70 Supras
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Sun, 04 September 2005 22:55
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The build plate says that it is Not an LSD standard, but as said previously who would set a car up like that and not find an LSD centre...
Standard ratio is 4.1 (according to build plate)
Tis the "povo pack" JZA70 built up (read lighter than the GT Limited) but without ABS and the Luxury electrics (?)
There has been extensive work to the interior as that is not the standard location of the A/C controls (but a nice place to put it.)
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Location:
Kelmscott, Perth, W.A
Registered:
March 2004
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Re: JZA70 Supras
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Sun, 04 September 2005 23:29
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torsen lsd = G299
open wheel = G294
is that right?, how did you decipher the build plate?
climate controls have been shifter over to accomodate the 3 gauges, ive seen this done many times before, typical jap mod on these cars.
are the seats still electric?
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Location:
Northwestern Sydney
Registered:
August 2002
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Re: JZA70 Supras
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Sun, 04 September 2005 23:45
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Search for "Ratio Availability" there is a list of what the numbers mean, the firat letter is the size the next 2 numbers a the ratio the lat is the number of pinions and weather or not it is LSD. I'm still unsure what the last "9" denotes however.
The climate controls relocation wouldn't be a hard job but I like the option of putting guages in the standard loaction rather that hanging them from the pillars etc. Might look at this further..
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Location:
Sydney
Registered:
March 2003
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Re: JZA70 Supras
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Mon, 05 September 2005 07:29
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Im not sure if they are electric, but thanks for the info guys. So basically, its the bottom of t he range, no LSD, but more likley to have one due to the mods.
Cheers
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Location:
Sydney
Registered:
September 2003
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Re: JZA70 Supras
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Mon, 05 September 2005 09:32
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i have to say that interior is damn clean, for a jap car of that age.
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Registered:
October 2004
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Re: JZA70 Supras
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Wed, 07 September 2005 06:39
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I can see from the pics that this one does have electric seats..
As mentioned above , i can't see why a car with this level of modification wouldn't be fitted with an lsd of some kind.
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Location:
tas
Registered:
June 2002
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Re: JZA70 Supras
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Wed, 07 September 2005 08:20
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my gt limited which came with a turbo 7m came with an open diff 
mz21_shiznac, whats it like riding on those bilsteins the ones those special JZA70's came out with? pretty good? i just ordered a set. Goodbye boat handeling, hello broken ass ?
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Location:
Kelmscott, Perth, W.A
Registered:
March 2004
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Re: JZA70 Supras
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Wed, 07 September 2005 15:25
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ive put this together after the previous questions...
may contain errors
JZA70 DIFF INFORMATION
G = SERIES
29 = 4.10
31 = 3.91
4 = OPEN
9 = TORSEN
G299 = M/T TORSEN (4.10) BLMVZ, BJMVZ, BLMQZ, BLMZZ, BJMZZ.
G294 = M/T OPEN (4.10) BLMVZ, BJMVZ,
G319 = A/T TORSEN (3.91) BLPVZ, BJPVZ, BLPQZ, BLPZZ, BJPZZ.
G314 = A/T OPEN (3.91) BLPVZ, BJPVZ,
TORSEN STANDARD ON [R] / LIMITED / LIMITED AEROTOP
TORSEN / OPEN OPTIONAL ON TT / AEROTOP
TT = BASE MODEL
diff and chassis codes from build plates can be referenced on the following pages.
http://www.toysport.com/Technical%20Information/To yota%20Differentials%20Identifications.htm
http://www.toyota-supra.info/models/1991_8/
[Updated on: Wed, 07 September 2005 15:33]
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Location:
Perth
Registered:
October 2003
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Re: JZA70 Supras
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Mon, 12 September 2005 02:38
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Gxx4 would usually indicate a 4 pinion mechanical LSD 8" diff, this is why I said it was LSD.
You guys are saying this is different for JZA70 supra so im wrong then arent I
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Location:
Kelmscott, Perth, W.A
Registered:
March 2004
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Location:
Perth
Registered:
October 2003
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Re: JZA70 Supras
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Mon, 12 September 2005 08:29
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You are dead right, im not even half right, don't know what I was thinking, my car has G144 
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Location:
Sydney
Registered:
March 2003
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Re: JZA70 Supras
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Mon, 12 September 2005 08:46
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so, from factory, after all this debation, the car is not an LSD model?
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Location:
Kelmscott, Perth, W.A
Registered:
March 2004
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Re: JZA70 Supras
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Mon, 12 September 2005 15:49
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correct.
but sif it doesn't have a lsd in there.
importbits have 2x jza70 torsens for sale, 1x a/t (3.9) & 1x m/t (4.1).
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