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The mkiv Supra Owners Club

how do they mate a supra gearbox to a 3sgte


Guest Sanchi

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Guest vvtiguy

Hi Chris,

 

Yeah there are some pretty nutty things going on over there at the moment.

 

Last time i was on that forum there was a guy with a 1G-GZTE (The old twin charge setup) Cressida running sub 10's. I recall a picture of his modified airbox which he filled with ice just before each run lol

 

What are you putting the 4A in out of curiosity? is it the 20v lump? I love that engine, such a rev happy little beast.

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vvtiguy doesnt the 2s bell housing position the starter awkwardly next to the turbo??? Interested because we are doing a is200 3sgte transplant and I bought a full altezza box to deal with this issue

-Sanj getting a plate made is easy enough, we need to consider your turbo postion and the starter, idealy we want the starter under the intake manifold not the turbo side of the engine which most rwd stock toyota boxes will be, the bell housing from a altezza can be modified to fit pretty much any box you select which will allow you to bolt straight up to the 3sgte, from what I have researched, its most likely the clutch and flywheel will need replacing whichever combo you use, as on rwd cars the starter bolts up from the engine side rather than the box side like the mr2 which means contact between the starter and flywheel wont be correct.

 

The route I would take is.

 

Altezza bellhousing/flywheel/starter mated to the w58 box. As its the simplest bolt up once the measurement/machining/welding is done.

 

Unless of couse the 2s bellousing leaves the starer under the intake manifold.

 

Will look into it.

 

James

Edited by JDModified (see edit history)
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Guest vvtiguy

As far as i am aware it clears everything ok (although i'd say things will be very close on a standard manifold).

 

I did loads of research on this subject as back in 2005 i started a project building a faithful replica of the Castrol Tom's Supra (unlike that terrible White UK Spec with the Veilside kit that Toyota GB keep dragging around pretending its just like the JGTC Car...). Unfortunatly just before pulling the 2JZ out i had to abandon the project for finanical reasons.

 

I got as far as getting a complete drivetrain solution planned out based around the 2S bellhousing (which was available at MR T at that point in time). To be honest i never got around to even thinking about starter motors. However im sure looking through EPC we could probably find a smaller starter off a 4A/2S/2T which should do the job with a small bit of modification.

Edited by vvtiguy (see edit history)
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I was looking around for alternatives and on the lexus altezza 3sge engine there is a 6 speed manual gearbox do you think that may work or would the ratios be tooo out..

 

The black top 3S block is different to a Red top one in a MR2. The top two bell housing bolt holes don't align.

 

I would suggest a R154 as you can separate the bell housing. This means you could hack up the front half of a S series transverse gearbox and weld a back plate on to suit your needs. This would put the starter in the right place. You will also need the crank machined to take a spigot bush/bearing to suit a R154 input shaft.

 

Speak to Roger at Thor, we has done a lot of development on this sort of thing and I believe there is a solution involving a 3TC diesel bell housing and a W58 or something like that.

 

Failing that, Castlemaine Rod Shop, Dellow and Colin Dray do lots of conversions using Toyota boxes.

 

Lyndon

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;) Righto, hows the desk job suiting you????

 

James

 

I seem to be suffering from ar5e ache. I haven't had a sitting down job for 5 years, so it's a bit like riding a racer for the first time :)

 

I'm quite lucky, I don't have to pay for my car tuning or Dyno either, I have sponsors for that :D

 

Win, win, win ;)

 

Lyndon.

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Not sure if its been said or if you know. But its worth noting that given the choice of an r154 or a w58, the r154 would be the better option as its a much stronger box, w58's limits are said to be bpu supra levels (400bhp, not sure on the torque). What sort of bhp and torque is the engine putting out?

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Not sure if its been said or if you know. But its worth noting that given the choice of an r154 or a w58, the r154 would be the better option as its a much stronger box, w58's limits are said to be bpu supra levels (400bhp, not sure on the torque). What sort of bhp and torque is the engine putting out?

 

Even with 700bhp the best I've seen out of a 3S is 405lbs/ft so a W58 would be OK and they are a lovely slick box. The R154 is basically a truck box, it's clunky, it's heavy and it's a cnut to get 2nd from 3rd when the oil's cold (I ran mine on ATF which helps). I've ran my R154 to 585lbs/ft at the input shaft in my old Mk3 and it loved it, so they are strong.

 

If you want one I still have it ;)

 

Lyndon.

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