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Location:
act
Registered:
December 2002
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MA70 supra info!
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Fri, 27 June 2003 10:32
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hi all,
i was thinking of getting one of these. can anyone help me out with specs, modifications, opinions etc?
thanks..
matt.
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Registered:
August 2002
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Re: MA70 supra info!
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Fri, 27 June 2003 14:31
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3L twin cam 24 valve straight six Non turbo (7mge) and turbo variants (7mgte)
JZA70 came with the 1jzgte (2.5L twin turbo) -> imported.
200hp for the 7mge
250hp for the gte (from memory)
Car weighs in at around the hefty 1500kg mark.
Manual targa top is pretty rare, most targa tops are auto.
Brain not functioning now.....sleep.
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Location:
act
Registered:
December 2002
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Re: MA70 supra info!
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Sat, 28 June 2003 05:57
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its an auto and has a 7mgte...
any idea how quick it would be?
that should i do performance wise first????
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Registered:
August 2002
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Location:
Brisbane
Registered:
May 2002
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Re: MA70 supra info!
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Sat, 28 June 2003 07:48
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Shifty's car ran a 13.7, but that was with the stock cooler.
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Location:
Brisbane
Registered:
November 2002
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Re: MA70 supra info!
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Sun, 29 June 2003 10:22
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Well I am Shifty from PF 
First thing is get the head bolts re-torqued a little beyond factory spec. Then go to autobarn and get some spark plugs but specify "one step colder". Fit the plugs, replace the oil (type depends on the condition of your engine, personally I run a high quality synthetic), oil filter, change the coolant, get the timing etc all spot on and factory-standard before you start making any modifications. Also worth looking at replacing the timing belt depending on kms.
Then your first modification should be a 3" exhaust straight off the turbo. Don't f_ck around with shiny mufflers, 5" tips, or stainless steel.. a mandrel bent 3" mild steel exhaust with a generic 3" cat and one or two generic 3" straight thru mufflers will be quiet and effective. My exhaust cost like $900...
Your next accessory should be a boost gauge (about $50-$150 depending on taste.. you can spend more but you're only wasting money). Then add a bleed valve (about $100 new) and set the boost to around 10psi. Any higher and you will hit boost cut on gear change (auto... manual you could go a touch higher).
This should have you easily into the 13's (if you can drive!)
I would suggest that for longevity from the auto you fit an aftermarket oil cooler ($200) and get the shifts tightened up a bit (about $400 if you take the gearbox to a shop yourself... about double that if you take them the car!).
Should end up with a reliable quick car as long as it wasn't a cr@pper when you bought it.
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Location:
Brisbane
Registered:
November 2002
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Re: MA70 supra info!
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Sun, 29 June 2003 10:27
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Also it's worthwhile adding a K&N filter, and also cutting off the front of the airbox (hard to explain but you'll see what I mean when you look at it)... you will get better airflow then.
I'm not into rice, but I'll admit it does make it sound really good too!
Another thing to think of is the blow off valve... the factory one is prone to failure, you can replace it with a Bosch one from any Autobarn.. about $50 for the valve and you'll need a hose and some clamps for another $20 or so.
Suspension wise, a front strut tower brace makes a great difference, they're only $100-$150 second hand from most importers.
You'll love the car
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Location:
tas
Registered:
June 2002
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Re: MA70 supra info!
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Sun, 29 June 2003 17:46
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7M-Brisbane, That's the best supra info I’ve read so far!
I just bought my supra 87 (7MGTE) for $2500, had some front panel damage, came with a 3" exuast. But resonates, and is WAY TOO LOUD. What can I do to quite that exuast without hampering performance?
This supra has a Digital Dash. I’m curious, is the turbo gauge the same as a boost gauge? Or something different?
The engine has blown one or two headgaskets before I bought it, so I will have to re-torque it tighter like you said.
It's done 150,000kms, sounds pretty healthy except for a tappety sound, which could be a loose valve, I’m not sure.
Also what kind of oil would you recommend for an engine of this age?
The auto transmission can shake the whole car when going into reverse. Is that a bad sign?
Thanx in advance.
Chris
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Location:
Brisbane
Registered:
November 2002
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Re: MA70 supra info!
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Mon, 30 June 2003 10:51
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Thanks, I spend too much of my time talking and thinking about supras 
EXHAUST
My exhaust had two mufflers, I notice that they drone a lot with only one muffler - if yours has two it might be worth adding another. A lot of people will tell you that this effects power negatively - I would be surprised if you notice any difference at all, it would be a couple of horsepower at most. If it bothers you, then fix it.. and if a few hp bothers you, then it can easily be made up elsewhere.
Seriously at most 5hp is the difference between a 13.7 and a 13.6... and believe me 1/10th of a second is bugger-all in real life.
When I had the auto mine droned a little, but that was only when it was held at constant low revs (eg at 60km/h on very light throttle up a slight hill).
Oh, also, if yours is only a cat-back exhaust it will drone terribly!!! If this is the cause, then you should DEFINITELY get it done.
HEAD GASKET
If your car has blown a few head gaskets, your head may be a little corroded. Take it to a radiator shop and get the cooling system flushed out. Check out the alloy coolant hoses and see what condition they are in - being a similar alloy to the cylinder head means that they will exhibit similar tyres of wear to the inside of your engine!
I would suggest that you budget on pulling the engine out, having it o-ringed and fitting a copper gasket. You will get away with this for about a grand in total if you pull the engine out yourself.
OIL
To be honest I'm not much of an oil afficionado, so I'd prefer not to comment... but personally I'd get that valvetrain rattle sorted out first. Once that is done, get some cheapish brand name oil and a new oil filter. Run that through the engine for about the time it takes you to use a tank of fuel (a few hundred kms), and then drop it out.
That should hopefully flush out the system nicely. From there, run a fairly thin synthetic/semi-synthetic oil and see how it goes. If it seems to be a little smoky or makes any knocking sounds at all (particularly noticeable on cold startup or at high revs), then I'd definitely be going a little bit thicker. Trial and error, unfortunately.
Also you should ALWAYS (no excuses, they're only ten bucks or so and it's a 10 minute job at most!) change your oil filter every 5000kms and your oil every 10,000kms (every 5,000kms is better, but can get a bit expensive).
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Location:
tas
Registered:
June 2002
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Re: MA70 supra info!
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Mon, 30 June 2003 12:53
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I'm swapping my 3" exuast for the orignal 2.5" that came standard with supra's. At least it will be alot quiter. But will i run into problems when i start modding the engine for more power?
Thanx alot. Chris
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Location:
Brisbane
Registered:
May 2002
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Re: MA70 supra info!
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Mon, 30 June 2003 23:22
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Putting a smaller exhaust on a turbo car is going to have a significant negative impact on performance. It's quite possible to have a 3" exhaust which isn't excessively loud (mine for example).
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Location:
Brisbane
Registered:
November 2002
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Re: MA70 supra info!
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Tue, 01 July 2003 09:01
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Norbie got it in one.
If you fit the stock exhaust again, you will lose HEAPS of power, as well as almost all of your power potential down the track.
Easy to get a quiet-ish 3" exhaust as I explained above. Norbie's is quiet also...
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Location:
tas
Registered:
June 2002
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Re: MA70 supra info!
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Tue, 01 July 2003 11:22
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well in that case guys, i'll stick with the 3" exuast i already have, but is there a simple/cheap way to make it less droning?
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Location:
Brisbane
Registered:
May 2002
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Re: MA70 supra info!
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Wed, 02 July 2003 04:38
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7mgte = 236hp
has anyone noticed more and more ma70's going around Brisbane lately.
Up until I got my Supra a year ago I used to see 1 ma70 a month. I saw 4 different ones alone on Saturday.
How much faster is a stock Supra turbo (7mgte) than my 7mge. Alot of articles reckon that the turbo transforms the car completely.
How would my 86 (one of the lighter ma70 models) Supra (7mge, 5 speed,extractors, exhaust) go against a bog stock auto turbo?
Surely it wouldn't be much slower would it?
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Location:
Brisbane
Registered:
May 2002
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Re: MA70 supra info!
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Wed, 02 July 2003 11:23
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Yes, it would. 
It's not so much the extra power, it's the much fatter torque curve which makes the turbo a quicker car. Drive one and you'll see what I mean.
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Location:
Brisbane
Registered:
November 2002
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Re: MA70 supra info!
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Wed, 02 July 2003 12:33
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Again Norbie preempts me (btw I hear you got a letter in the mail? )... prettymuch spot on.
Outright straight line you might go okay against a stock auto turbo.. but you'd really have to give the atmo one hell. The low-down torque from the turbo motor will give you heaps more at part and mid throttle - you're right, it will transform the car.
And once you do somethign as simple as stick a good exhaust on a turbo one... you'll walk all over a modified atmo one.
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Location:
Brisbane
Registered:
May 2002
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Re: MA70 supra info!
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Thu, 03 July 2003 08:50
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fair enough.
better keep saving for a 1jz then!
anyone wanna take me for a ride in their turbo supra?? 
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Location:
Perth
Registered:
May 2003
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Re: MA70 supra info!
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Thu, 03 July 2003 08:59
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when u guys say 236hp is that at the tyres?
or fly wheel?
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