How much power can a 5MT tranny take?

[FinishlineWRX]

Ive heard around 350/350 is the number to start to worry. But it really all depends on your driving style. My 2l car made 370whp and 330wtq. The 818's weight and 2wd like posted above will be less load.

With the STi 2.5 it not the hp you need to be concerned with it the TQ that breaks them.

[shinn497]

I wrote a thread about it during that time, but someone replied that the 5MT couldn't take big numbers. I'm looking to couple a STi engine with it and hope to get around 250 HP. Is this too much for this tranny?

Ummm the Sti is 300hp.

With the STi 2.5 it not the hp you need to be concerned with it the TQ that breaks them.

This would be true of any engine.

There have been humungous discussions on this. The short answer is that a lighter 2wd car will put less stress on the engine but this won't change that the drivetrain will be subject to the same level of forces regardless of car weight and configuration 2wd/4wd.

[metalmaker12]

Ummm the Sti is 300hp.



This would be true of any engine.

There have been humungous discussions on this. The short answer is that a lighter 2wd car will put less stress on the engine but this won't change that the drivetrain will be subject to the same level of forces regardless of car weight and configuration 2wd/4wd.

Not completely true, weight has a lot to do with transmission load and so does 2wd vs 4wd. Less sprung mass to move and less dry friction due the the lower mass, also there is less internal friction on the parts it is moving and its own internal parts( one diff, not two, or three). It is true that the same horsepower will go through the tranny, but with much less resistance from the cars lower mass and less attached parts. The brakes, engine, wheel bearing, tires, axiles, etc, will all fair much better on this lighter car. This is why lighter cars like a honda fit have less maintenance than say f150 truck if driven the same. Also hondas are made better lol, so that comparison is weak. All in all, the lighter car is less mass to get moving and keep moving which puts less stress on the internal moving parts (engine and tranny)....period

Not that any of this matters bro, but not all sti's are 300. The jdm's v7-v9 are 286-290 range--- and spec c's with big head ports are like 330hp.
The usdm 300hp sti has a fat low end due to more displacement, but the jdm ej207 v8-v9 can redline at 8,600rpms which gives it more top end grunt. There both great, but if you can tune a ej207 to get that fat low end and keep its high end you got a perfect balance. either will be awesome in this car.

[Rasmus]

Moore Performance is manufacturing bracing for the 5 mt transmission.







Not that the 818 will need it running only 818 kilos in 2wd. Tires will break traction long before the 5mt pops.

[metalmaker12]

cool stuff, like to see it mounted up on tranny