quick question,

I need a new clutch on my 87 na, suppose i bought a nice upgraded one, would i be able to put it onto a turbo transmission when i eventually change the engine and tranny to the turbo?

also the flywheel?

Clutch is not interchangeable between w58 and r154. Flywheel- I am unsure, but I doubt they are interchangeable.

Some people have gotten away with a w58 trans in a na-t though. HTH.

well i can put the na's clutch on the turbo, so what kind of HP can the na's hold?

A stock n/a clutch probably will not hold much more than stock n/a power.

Here is a link for some upgraded clutches.

http://www.advancedclutch.com/V3/mainframe.htm

They list up to 355 ft/lb capacity for an n/a clutch. That should be sufficient to kill a w58 trans

quote:

---

Originally posted by chevyeater:
A stock n/a clutch probably will not hold much more than stock n/a power.

Here is a link for some upgraded clutches.

http://www.advancedclutch.com/V3/mainframe.htm

They list up to 355 ft/lb capacity for an n/a clutch. That should be sufficient to kill a w58 trans

---

Im not so sure about that. A new clutch should hold some good power, its a worn one that has undergone turbo conversion I think. I think the W58 is stronger than that.

In Tressel we trust.

Does toyota publish a torque rating for the w58? I was not able to locate one. The fact that they installed the r154 behind the factory turbo is evidence they had relability concerns with the w58.

I also believe most oems in general do not put a stronger clutch than they need in thier offerings. Why have a "gorilla" clutch if you dont need it right?

I guess we will find out when you go na-t though, huh Nick?

quote:

---

Does toyota publish a torque rating for the w58? I was not able to locate one. The fact that they installed the r154 behind the factory turbo is evidence they had relability concerns with the w58.

I also believe most oems in general do not put a stronger clutch than they need in thier offerings. Why have a "gorilla" clutch if you dont need it right?

---

Is this your first Toyota? Toyota overdoes everything. Even the F-ing electrical connectors. The R 154 is stronger, but it was devolped with new ratio's for the different torque curve.

In Tressel we trust.

I am sure you could run 500 ft/lbs of torque thru a w58 for a little while, even with the stock clutch. I have seen more than that run thru a borg warner t-5. I am sure that was not a relable combination, however.

As for the snyde "first Toyota" remark, yes my Supra is the only Toyota I have personally owned. I have had it since 1993 and put over 160,000 miles on it. I work for Chevrolet and we have been selling Corrolas badged as a Prism for many years. My brother owned a 4runner for a few years as well. My experience has not led to any conclusion that a Toyota has a stronger driveline than the GM products I am very familiar with.

Until or unless you can produce a torque rating for a component anything you say is conjecture.

The stock n/a clutch will not last long at all if used on a turbo engine with the W58. I think Adam Hintgen tried it at elevated boost levels and it lasted about 3 weeks.

BOTH the clutches and flywheels are different.

The n/a clutch AND flywheel can ONLY be used with the W58.

The turbo clutch AND flywheel can ONLY be used with the R154.

Nick M is right about over engineering. The W58 will hold around 400rwhp. I think Adam got away with 460rwhp for a few months before it blew up on the highway.

Yes, you can run any ammount of torque you desire thru a manual gearbox FOR A LIMITED AMMOUNT OF TIME. The normal mode of failure is in the bearings that the mainshaft/countershaft ride in. Torque application thru a helical gearset causes the gears to spread apart. Too much torque causes bearing failures. It does not happen instantly.

Shock load will ruin a trans in a hurry. Like instantly.

Launching on slicks, or rolling backwards a little and accerating hard forward are examples of a shock load.

In Tressel we trust.