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Location:
tas
Registered:
June 2002
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MA70 to JZA70 conversion question (i tried search)
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Thu, 05 February 2004 09:20
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So while i was over in Melbourne I checked out a soarer auto 1jz-gte front cut for $2500 at BIP toyota. The first question that came to mind is will the soarer front cut provide everything for my MA70 supra conversion?? is the crossmember the same as in a supra? or is the soarers different? and thus no use to me?
do i have to actually source a 1jz supra front cut for this conversion?
also another problem that i thought i might run into is with my digital dash, did the JZA70 come out with a digital dash? is it possible to do a 1jz conversion and still use my digital dash?
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Location:
Brunswick, W.A.
Registered:
December 2003
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Re: MA70 to JZA70 conversion question (i tried search)
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Thu, 05 February 2004 10:21
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do it the easy way, sell the MA70 and get a JZA70. but if your keen on this, im not sure about the crossmember but i do know that the some of the 1j supras had the digital dash if thats any help.
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Location:
Castlemaine Vic
Registered:
November 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Thu, 05 February 2004 11:13
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dude, try supraforums.com
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Location:
tas
Registered:
June 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Thu, 05 February 2004 15:07
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dude the yankyforums (supraforums) didn't answer my question, i waded thru every message.
besides they all come to toymods to get advice about 1jz's
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Location:
UK
Registered:
May 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Thu, 05 February 2004 15:22
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http://autos.groups.yahoo.com/group/MKIIIJZA70/
The digidash should be fine, although there are two different digidashes.. one use a 1/5th scale to the ECU, one doesnt.
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Location:
tas
Registered:
June 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Thu, 05 February 2004 15:34
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thank you, so i should have no problems just wiring it up to work with my digital dash, fingers crossed i have the right dash with the right scale.
don't spose you know about using a soarer 1jz front cut for the conversion? i'd imagine the only problem could be with the crossmemeber and 1jz engine sump bieng on the wrong end. But maybe there are alot of differences that would make the conversion too hard, wiring maybe? or is it all the same?
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Location:
Brisbane
Registered:
May 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Thu, 05 February 2004 22:54
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If you went to the 1JZ section of SupraForums you would have found all the info you need. Try again!
In summary though, if you get a JZA70 front cut it's practically a bolt-in. If you get a Soarer front cut or any other type of 1JZ, you're looking at all sorts of custom work, major components which don't fit (ie sump), and all manner of wiring nightmares. Basically it would be just as hard as a 2JZ conversion!
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Location:
Adelaide, SA
Registered:
May 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Thu, 05 February 2004 23:48
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As Norbie said, take the time and effort to source an auto jza70 front cut and you be OK - far better than mucking around with anything else. Since you bought your car very cheap, it'll probably be cheaper to get a front cut and do the swap than to buy a jza70 - as long as you can do all or most of the work yourself. If you can't, then you'd be better off getting your 7m rebuilt, or buying a 7m and getting it built properly.
It won't be easier than buying a jza70 though!
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Location:
sydney
Registered:
March 2003
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Location:
Adelaide, SA
Registered:
May 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Fri, 06 February 2004 01:08
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The only metal you have to cut is ennlarging the hole where the powersteering lines go through. Bitch of a job and fiddly. Depending on what engine mounts you have (square or round) will depend on whether you need to change crossmember. I did the early ma70 to jza70 conversion and thus needed the new crossmember - jus swapped the whole lot in (sounds easy but was pain in the arse) - then you also get the progressive powersteering unit.
Wiring won't plug straight in, you'll need to connect the JZA70 harness to your dash/instrumnets, TEMS (if you got 'em) and a couple of other body loom bits. Wiring needs some attenion inside the engine bay - generally swapping the fuse box, ignition module, etc etc all over from the jza70. Need to wire-in the fuel pump too (from memory).
Sideshow is spot on when he says it's not hard, but fiddly and time consuming. 99% of the jza70 bits bolt straight in, even on my NA ma70 the holes and captive nuts were all there for the intercooler, pipework etc etc. Use the jza70 radiator as the hydraulic fan bolts to it.
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Location:
tas
Registered:
June 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Sat, 07 February 2004 12:16
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sorry for the late reply, dodo have been real bastards.
anyhow good thing i didn't sell my dell notebook and buy the soarer fron cut! thanx for the info guys.
Norbie, i did finally find the 1jz/2jz section thanx, but bugging toymods members is still a better way j/k 
sideshow, thanx for the info, i'll keep it handy.
so the 1jz doesn't have a clutch fan? or a belt driven water pump like the 7m?i take it a jza front cut should have the right fan and water pump?
lumpy, i am gonna go the same road you have, doing it all myself, swap the crossmeber over etc, i dunno what i'm in for, but i always come thru good in the end.
by the way how is that progressive power steering? it sounds awesome.
cheers guys.
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Location:
Adelaide, SA
Registered:
May 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Sat, 07 February 2004 14:50
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Progressive power steering sounds all snazzy but really it's a little control box that takes on input from the speedo and controls a solenoid on the power steering, reducing assistance at speed over 60kph. I noticed a bit of a change but nothing dramatic. It makes long sweepers at 110kph a bit nicer, and feels less light than the original steering.
Get a jza70 front cut and swap entire crossmember with steering rack still attached, then also swap over computer (located in passenger side kick panel) and wire it in.
Factor in new engine mounts (round ones tend to crack as they get older) and a new serpentine belt, idler pulley bearing, etc etc into the conversion cost. As an idea, mine cost around $6k, with the manual front cut $4.5k (auto's much cheaper) and all of the work being done by my Dad and I. Only things we got done elsewhere was wheel alignment and exhaust.
It took around 7 weekends, with lots of fiddy bit'n'pieces taking the most time. I have a swag of photo's I could scan in email if you like. After seeing all the work required you may decide to rebuild the 7m!!
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Location:
Brisbane
Registered:
May 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Sat, 07 February 2004 14:58
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| dingaling wrote on Sat, 07 February 2004 22:16 |
so the 1jz doesn't have a clutch fan? or a belt driven water pump like the 7m?
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It has a belt driven water pump, but unlike the 7M everything is run off a single serpentine belt. The fan is a hydraulic unit which is powered by a little hydraulic pump built into the water pump. It's much more complex than a conventional clutch fan but apprently it works quite well, ie its speed can be controlled by the ECU and it's just as powerful as a clutch fan.
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i take it a jza front cut should have the right fan and water pump?
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A front cut is quite literally the front half of the car. It comes with everything.
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Location:
tas
Registered:
June 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Sun, 08 February 2004 04:10
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crikey $6 grand lumpy?
i thought i could get away with buying the auto front cut for $2500 plus shipping, doing all the work my self, buying a few small bits and pieces (engine mounts, belt etc)
and be done with it. (total cost under $3500 i would guess)
now your making me think twice about it, maybe a done up 7mgte is still an idea.
but just knowing the 1jz is a much newer, better, revvier engine that doesn't pop head gaskets and is probably more fuel effiecient then the 7mgte is what keeps me interested in this conversion.
was the 1jz much of an upgrade from the 7m? i mean was it a night and day difference? or just a mild increase of g-force.
norbie, one belt that runs the lot seems like good engineering to me, rather than have a long pulley running 3 belts(7m), no wonder mine wobbles still.
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Location:
Adelaide, SA
Registered:
May 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Sun, 08 February 2004 07:29
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Well, an auto is cheaper so you that saves a couple of thousand.
Also, you tend to get into the "lets fix it all whilst it's been pulled apart" mode - I did, and that is a factor.
Lets do the maths!  (I found a stack of my receipts today)
- Toyota list prices are in brackets, I got some good discounts for buying heaps of stuff at once and the spare parts guy was a revhead too.
Manual jza-70 front cut - $4.5k (was fully dressed with all panels and had a HKS blow-off setup and strut brace)
Seal for powersteering pump - $8 (9)
Engine mounts (2) - $198.18 ea ($248 ea)
TEMS shocks, front and rear - $45.45 ea ($70.87 ea)
Front lower control arm bushes - $125 (Noltec)
Getting the old bushes pushed out and new ones fitted - $33
Machine front disks - $26.40
Bearings and sundry items - $30
Air filter (genuine) - $42 ($49)
New serpentine belt, vaccum hose and fittings - $57
6 platnium spark plugs - $12.50ea
2.5 inch exhaust (from cat back) with muffler and resonator- $300
Front/Rear Wheel aligment - $50
New radiator and cooling system flush - $480 (jza70 one has platic top tanks that crack)
Coolant $40
Synthetic Oil $50
Transport SA approval - $140 (had to go back after initial inspection)
Re-gassing air-con - $300
Total (close enough to it) - $6700. - not including tyres, rego, insurance etc.
This is doing all the work ourselves - wiring, monkey work etc.
You sitaution may be different - but keep in mind a front cut has done ~100,000kms and needs some tidying up before putting it in.
Also the 1jz powersteering pumps can be dodgy - I've had one fail and propblems with leaks, air entering system, noise etc.
It's better to know this before deciding to do a conversion. Also, once completed you've still only got a dead stock 1jz - which you'll want to start modding too.
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Location:
sunny coast, qld
Registered:
October 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Sun, 08 February 2004 09:09
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I think that is actually pretty cheap. You only had to spend $2200 after you bought the front cut.
I didn't even have to buy my front cut and I would have spent about $7000 from the time when, the engine was in the car but not wired. this is a 1jz in a corona though not ma70.
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Location:
Brisbane
Registered:
November 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Sun, 08 February 2004 10:38
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It's about time people started talking reasonably about the costs of mechanical work on cars.
Nothing is ever straightforward, simple, cheap, or easy. Nothing.
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Location:
Brisbane
Registered:
May 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Sun, 08 February 2004 14:33
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He's right you know. If you gasp at the mention of $6k, you should step away from the modified car scene right now, and don't even think about doing an engine conversion! It's an expensive hobby, take it from me...
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Location:
tas
Registered:
June 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Mon, 09 February 2004 02:30
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shizer! i was living in lala land if i thought i could afford this now since i'm currently unemployed.
i need a new engine one way or the other, and the 1jz will have to wait for awhile. In the meantime i'll just have to get another 7MGTE, that can be done cheap. Buy good engine, remove bad engine, put in good engine, everything is installed, ecu, wiring, crossmember, mounts should be cheap and easy to do.
(by the way my current engine is probably good for another 20-50,000k's but it vibrates the whole car at certain RPM, in neutral, especially 1.5k-2.5k rpm, i think it's either engine mounts, or the slight wobble from the crank pulley, also i'm getting alot of mis firing in the lower RPM range but it could be the NGK spark plugs Ed sent me that are doing that. I Just want a new engine to do up for reliabilty and abit more power (200rwkw is all i want, is that too much to ask?)
i was really looking forward to a newer engine design with better fuel economy and power :(-
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Location:
Adelaide, SA
Registered:
May 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Mon, 09 February 2004 03:37
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Getting another 7m is the cheapest way to go. They're not so bad, once HG issues are resolved and can give you 200 rwKw no worries. In fact, as they are a single turbo, it's probably a little cheaper to get there with a 7m than a 1jz.
Begin rant!
Re: 200rwKw aim - why do you want this? Aiming for a dyno figure that sounds good is not going to make you happy - just get the car going nicely and enjoy it. Too often you see people think their car isn't good enough or fast enough because they read too many magazines and decide they need X amount of Hp. /rant
I wouldn't worry about doing a 1j conversion in the future, just sell the ma70 and buy a jza70.
Hey, it's always better to find this outnow than halfway through a conversion when you run out of cash and have no car.
And a wobbly crankpulley was the reason I finally binned the bugger 7m-ge and went 1jz!
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Location:
tas
Registered:
June 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Mon, 09 February 2004 15:59
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I think your right, altho i bet a 1jz would save alot of money on fuel over the long run.
reply to rant/
200rwkw isn't such a big deal, but it is enough power to flog these bogans with there commodores (they seem to be brainwashed into thinking no car on earth is better than holden) they bash toyota and think my car is a girls car aswell as my friends celica, but that's Tasmania for you. Anyway 200rwkw is a modest goal that isn't over the top, and i'll have fun learning.
if i can sell my car for a decent price i'll put it towards a jza70 for sure, it's an obsession with me having to constantly upgrade, it never ends.
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Location:
Adelaide, SA
Registered:
May 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Mon, 09 February 2004 22:50
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| dingaling wrote on Tue, 10 February 2004 02:29 |
I think your right, altho i bet a 1jz would save alot of money on fuel over the long run.
reply to rant/
200rwkw isn't such a big deal, but it is enough power to flog these bogans with there commodores (they seem to be brainwashed into thinking no car on earth is better than holden) they bash toyota and think my car is a girls car aswell as my friends celica, but that's Tasmania for you. Anyway 200rwkw is a modest goal that isn't over the top, and i'll have fun learning.
if i can sell my car for a decent price i'll put it towards a jza70 for sure, it's an obsession with me having to constantly upgrade, it never ends.
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Fair enough - I think you'll find that a mildly modded 7mgte or 1jzgte is enough to flog commodores (provided you get traction).
And with the obession to upgrade.....it's one reason I'll be selling my car soonish. I always find something else on it to spend money on - and it's not the wisest of investments!!
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Location:
tas
Registered:
June 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Tue, 10 February 2004 05:21
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If i can get rouphly another 100Hp out of the 7mgte reliably that should put close to 200rwkw if my estimation skills are any good.
Whats that involve, a metal headgasket, arp head bolts, hi flowed turbo, lexus AFM/550cc injectors, boost controller, better fuel pump and maybe a better intercooler? i dunno whatelse i'd need, engine managment too? I probably wouldn't do it if i was going to lose money in the end, but when i sell the car i should get back all the money i put into it (down the track).
yeah? what are you upgrading to? another toyota? what sort of price range will your jza70 go for? $10k-$12k?
(drools manual 1jz supra)
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Location:
Adelaide, SA
Registered:
May 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Tue, 10 February 2004 06:15
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Depends on how it scrubs up, but it is in pretty fine condition and the conversion looks excellent and original. Plus it's a genuine R154 gearbox, and an unmodified 1jz - with TEMS, power seat, everything working etc. And it's metallic silvery-blue with a grey interior (not those awful maroon or brown colours).
Probably between $12k and $15k once the bodywork has been tidied up (couple of scratches etc).
I'm not the man to talk to re: 7m, there's a lot of info already out there, and heaps in the US.
I'll be getting a company car this year, and it's time to buy a house so my baby has to go.
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Location:
tas
Registered:
June 2002
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Re: MA70 to JZA70 conversion question (i tried search)
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Tue, 10 February 2004 06:42
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hey hey lets not get personal, i really like the maroon interior in my supra. I concur brown is aweful.
yes selling your baby is a good idea, that way you can keep your car. j/k
well lumpy as always thanx for your wise words of wisdom (aswell as hedgehog, norbie, sideshow,7m-brisbane thanx alot)
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