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high power dream, transmission impossible?
by
NintendoKD
on 16 May, 2010 22:21
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ok, so It is no secret that I am building a frankenmotor to rival that of the finns, however without a transmission I won't go anywhere very fast. I am looking for options for bolt up transmissions that will handle the power of say "spitballing here" 250-300 hp, and a comparable amount of torque, at say 7000 rpms max? As I understand it the tiny 020 won't last at these stresses "just ain't beefy enough" I realize also that a bolt up option may not be readily available as this community focuses on lower powered builds and such a precedent hasn't been set. I am looking for some advice/options as well as any useful criticizm. My machinist has recently had a brian tumor removed and will not be able to resume work on my engine and I will need the expert advice of a driveline shop, or speed shop that can lead me in the right direction when it comes to placing this beast into my 01' MR2Spyder I plan to boost at or around 30-40 lbs.
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#1
by
rabbid79
on 16 May, 2010 22:31
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The 02A, 02J, and 02M are all robust transmissions that should work pretty well in your application. Particularly the 02M, since it is the newest, and is available in 6-speed FWD configurations. The 1.8T guys make a lot of HP, and I think this transmission is pretty reliable. Another nice thing about these trannies is that they are cable-shift, and it should be easier to retrofit into your MR2 Spyder than the shift rods that the 020 uses.
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#2
by
NintendoKD
on 17 May, 2010 05:49
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any idea where this unobtanium can be obtained from? or how to Identify it in a boneyard. AKA: identifying marks, cars it comes in, etc.
thanks,
Kevin
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#3
by
rabbid79
on 17 May, 2010 09:22
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I think the 02As first showed up in the VR6 Corrado, and perhaps the VR6 MK3 Jetta. 02Js and 02Ms were in the MK4s.
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#4
by
burn_your_money
on 17 May, 2010 09:55
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TDIs also have 02As.
They can be identified by the cable shift and hydraulic clutch setup
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#5
by
RadoTD
on 17 May, 2010 18:35
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Corrado G60's also had O2A trannys.
The bellhousings between 4cyl and 6cyl motors are different, so make sure you get it from a 4cyl car. TDI would be better as the gearing makes more sense.
And there are VR6 guys putting more torque/power than you can dream of through an O2A, so don't do anything *too* stupid and it'll keep itself together
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#6
by
745 turbogreasel
on 17 May, 2010 18:40
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A THM425 74-78 Eldo and Toronado will laugh at your 300/300 all day, and the switch pitch torque converter might play well with a VNT?
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#7
by
NintendoKD
on 17 May, 2010 21:05
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I am more or less looking for: will it bolt up? will it hold up? parts/availability?
cable shift is def the way to go as the tranny in the spyder is originally a cable *** one, and it would make the changeover pretty simple. I will be in the field for another couple of days till sat sometime so if anyone's looking for me that is where I'll be.
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#8
by
rabbid79
on 17 May, 2010 21:32
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I am more or less looking for: will it bolt up?
If this was a discussion about how to install one of these trannies in a MK1/MK2, and which parts can be reused/swapped over/custom made, then all of this ground has already been covered, many many times, on this and other forums. Since you want this for a completely custom application such as install into your MR2 Spyder, then all you really need to know is, yes, if you get the 4-cylinder specific bellhousing version, it will physically bolt to your 4 cylinder. Everything else (e.g. hydraulic clutch, axles, speedo sensor, brake light switch, transmission mounts, shifter box, etc.) is up to you.
will it hold up?
As RadoTD said, VR6-turbo guys have put north of 500 HP through the 02Ms. HPA put 600 HP through the AWD version of the 02M.
parts/availability?
Since these are a basically new transmissions, you should have no problem finding them close and cheap. Check car-part.com. There should be thousands of them spread across the country.
All of this having been said, are you sure your stock MR2 transmission won't work? What kind of torque levels do they break at? Maybe fix the weak link in that box, whatever it is?
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#9
by
NintendoKD
on 21 May, 2010 17:48
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I thought about using the stock mission, but the guys on the celica forums and mr2 spyder forums strongly advised against it
sorry to be redundant, just trying to get my ducks in a row.
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#10
by
RabbitJockey
on 22 May, 2010 08:20
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so even the toyota guys no 020s aren't good for high power? i think 020 is a good reliable transmission, it just isn't a good reliable transmission when it has lots of power going through it. when is this 7k diesel getting built?
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#11
by
8v-of-fury
on 22 May, 2010 19:32
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Kevo, my 600,000 mile 1.6 N/a hits 5k daily.. You should be able to do 7k no probs
GET ON THIS! I'M EXCITED.
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#12
by
RadoTD
on 22 May, 2010 22:57
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so even the toyota guys no 020s aren't good for high power? i think 020 is a good reliable transmission, it just isn't a good reliable transmission when it has lots of power going through it. when is this 7k diesel getting built?
If you baby them, 020's seem to take good power, but when you start hammering on the clutch and ripping the shifter through the gears, they fall apart pretty quickly. So... if you drive properly, you need an 02A
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#13
by
NintendoKD
on 23 May, 2010 12:58
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having not driven the car, I can say that I will baby it.....but...... I know that in my heart of hearts that I will drive it like it's stolen once finished. Not all of the time, but I know that I will. I would be foolish not to consider this. To answer the question I plan to have it all finished before I deploy in oct. nov. I am also VERY! excited
so for all intents and purposes I will need an 02a and I'll have a driveline shop take up the slack.
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#14
by
NintendoKD
on 23 May, 2010 13:04
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really before I go any farther, I should ask the Jedi Master Giles if the bosch pumps can handle these revs or if there is any way to keep it from self-destructing.