RogueSC3

I'm sure this has been covered a million times, and hopefully this will be the last.
I am trying to find a SOLID parts list for a w58 swap into a 1992 SC300 using the W58 from a 1994 Supra. I've found a lot of tid bits here and there by searching, I'm just trying to get the information all in one place and easier to locate in the future. If I can get the information I'm looking for (and the parts) I will make a write up, with pictures so this can be avoided in the future. Any help would be greatly appreciated, and I do think that the resulting write up would be beneficial to everyone involved! So if I'm missing something or am over paying for something please let me know!

Here is what I have so far:
I'm having a little trouble finding the information I'm looking for for this 5 speed conversion (I thought it would be all over the place on here!) I did how ever find your old write up for the w58-r154 swap you did in your SC a few years ago. I'm trying to do the same, only A34E to w58. Could you give me parts list please? This is what I have so far:

1JZ/2JZ flywheel:$298
Driveshaft:$600 (made to order)
stock w58 Clutch:$74
Clutch Slave cylinder: $34.00
Rear Main Seal: $32
SC300 Manual Shift boot: $58.00
SC300/SC400 Pedal Set for 5 Speed Conversion w/ Master cylinder: $455
Full Length Clutch Hose:$45
W58 Transmission Mount for MK4 Supra: $59.00

Already purchased:
1994 W58 Toyota Supra transmission and ECU

KahnBB6

iTrader: (5)

I can tell you one thing you don't need if all you're doing is converting to a W58 manual: a 4.083:1 diff. Stick with the automatic differential for better all around drivability. It's the way the 93.5-96 5-speed Supra came as well (4.272 rear).

You'll want a new W58 transmission mount (rubber) for the Supra but I believe your transmission crossmember actually fits for the manual conversion by flipping it around.

I don't recommend the stock clutch but if you have a deal on price then go for it. I recommend the factory flywheel and an ACT Stage 2 clutch and pressure plate. Don't bother with any more aggressive clutches.

You may or may not need a Yellowbox V4 to correct out any speedo errors from switching to the W58 gearing.

Tires are also a consideration in this conversion. If you're just NA and swapping to manual, consider sticking with a near-stock OD tire regardless of how wide it is. The Supra TT 255/40-17 rear and 235/45-17 front sizes work well on an NA manual.

iridebmx

iTrader: (6)

i'd rather have the 3.26 from a ls400. would have better gas mileage. ever driven a na supra on the highway? its at like 3500rpms at 70mph horrible

KahnBB6

iTrader: (5)

Um... it's not horrible at all. My 2JZ NA 5-speed car IS running a 4.272 rear axle ratio just like a pre-97 NA Supra. It turns at roughly 3,000rpm @ 70mph. It is only at 80mph that it turns roughly 3,500rpm. I get an average of 19mpg doing 80-85mph on my setup. If I drove 70mph it would be better. The 4.083 gearing spins at roughly 2,800rpm @ 70mph in 5th. Not much of a difference from the 4.272 in cruising but believe me, that gearing makes all the difference in shifting the power band to something far more useable over the 4.083 which doesn't effectively match the NA engine with a manual transmission for a performance application.

Edit: I'll add that the above also applies to a car using the an overall diameter tire that basicallly matches the stock SC tire diameter. Bigger overall diameter and you get marginally better fuel economy and marginally less revs at a given speed but lower overall acceleration numbers. The factory Supra TT tire ODs are more or less identical to the factory SC tire OD so you don't have to run skinny rubber to achieve this.

A 3.26 swap would definitely give you better gas mileage. It would also render the car's powerband totally useless and it would be a literal dog not only to accelerate but also to keep acceleration going or maintain speed on inclines. The NA setup isn't designed for such a low gear ratio. You can use a 3.769 (TT Auto ratio), however, if you use a V160/161 6-speed against the NA 2JZ.

Even with a turbocharged JZ engine you don't want a super low 3.26-- the only exception being if you have the 6-speed swap or maybe the 5-speed auto from 1UZ VVT-i cars.

RogueSC3

So what driveshaft are you running?

KahnBB6

iTrader: (5)

Me? The stock SC300 manual driveshaft that came with the car. I never changed it. I only changed the rear diff and the companion flange on it to fit my SC/5 shaft.

You may only need the transmission side of a W58 manual driveshaft for your conversion. Not sure but I think these things are two-piece. Also, a Soarer R154 shaft will not work against a W58, fyi.

jwin

iTrader: (16)

It's cheaper if you buy the parts from Sewell for the clutch pedal. Keep your brake pedal and just cut it down to the right size. That's what I did. You can't even tell.