Clutch Input

[Sportsguy83]

Originally Posted by Supermassive

Well if that's the case that kinda sucks...

345 WTQ is not enough for you? (Honest question).

Or what is it that sucks?

Edit: I find it interesting that on he site the FX300 is n ot for sale, and the FX350 says "new".


I should have a pic of mine soon to try and determine what is it that I really got

[Supermassive]

No...the car is likely going to be pushing near 400Wtq, not crank torque which is the measurement the manufacturers claim as holding capacity. I'm currently finishing some cosmetic work on the car before I turn up the boost and start replacing internals and such. I want to be running about 450-500WHP and 400+ ftlbs on pump gas after I finish the engine. I figure that that is doable, but I have been putting it off until a few shops start getting reliable numbers from built engines and give some insight into why they chose some of the components they decide to use. For now though I will just push my boost up to 12PSI or so and be content until i have some free cash for some forged bits

[Coheed]

Originally Posted by Supermassive

No...the car is likely going to be pushing near 400Wtq, not crank torque which is the measurement the manufacturers claim as holding capacity. I'm currently finishing some cosmetic work on the car before I turn up the boost and start replacing internals and such. I want to be running about 450-500WHP and 400+ ftlbs on pump gas after I finish the engine. I figure that that is doable, but I have been putting it off until a few shops start getting reliable numbers from built engines and give some insight into why they chose some of the components they decide to use. For now though I will just push my boost up to 12PSI or so and be content until i have some free cash for some forged bits

I never take the manufacturers claims to heart when it comes to clutches. I had a sintered iron FX500 that didn't even hold over 420wtq. Whenever someone tells me what their capacity is, i just subtract about 80ftlbs just for good measure.

I can't even begin to think the torture this transmission is going to go through at 400wtq. But my predictions are that the manual will not support that power level indefinitely. Fine for a weekend warrior. But I cringe to think of someone making that power with an aggressive clutch setup.

The gears in this transmission are pretty small. Big torque will be destroying these transmissions. But I do wish you the best of luck and look forward to the craziness!

[jamesm]

Originally Posted by ptuning

We use the Exedy Stage 1 Clutch on our 345whp, 257wtq FR-S. We can tell you with certainty, that it is the closest that you'll get to the stock clutch, in terms of range of modulation and overall feel. There is a little bit of clutch noise when idling in neutral, but it's very minor compared to most other aftermarket clutches. This clutch is 100% parallel parking friendly.

Please contact us, if you'd like any additional information.

Isn't the stage 1 rated at around 240tq?

[FirestormFRS]

There are a lot weaker links in the driveline than the gears. Gears are freaking stout no matter how small they appear they take a lot to break. I'd bet on axles being the weak link in any highpower/high traction enviroment.

[ptuning]

Originally Posted by jamesm

Isn't the stage 1 rated at around 240tq?

It's rated at 319TQ.

[Silverdub]

Glad to read this. I want a combo withflywheel but i dont want thr crazy nouses like clutch master. Hopefully act isnt as bad...

[Coheed]

Originally Posted by FirestormFRS

There are a lot weaker links in the driveline than the gears. Gears are freaking stout no matter how small they appear they take a lot to break. I'd bet on axles being the weak link in any highpower/high traction enviroment.

I don't see the gears in this tranny being any stronger than the SR20 6 speed boxes I'm used to. And they break at 400wtq all the time. I've pushed 1" axles to 600hp without fail on a daily driven car. But somehow, gears seem to be more prone to fatigue over time. I've shattered many gearboxes in the past, so my approach is... different.

[SmsAlSuwaidi]

well its been already proven that the axles are a weak link, Fullblown want to upgrade theirs before running it around the strip and so. E.kanoo from bahrain who owns the 2jzgte +v160 gearbox swapped gt86 snapped his axles as he dragged the car with 500sh wheel hp.


[ame="http://www.youtube.com/watch?v=tUp8-vKt6Ug"]2jz Toyota GT86 breaking an axle - YouTube[/ame]

[Coheed]

Originally Posted by SmsAlSuwaidi

well its been already proven that the axles are a weak link, Fullblown want to upgrade theirs before running it around the strip and so. E.kanoo from bahrain who owns the 2jzgte +v160 gearbox swapped gt86 snapped his axles as he dragged the car with 500sh wheel hp.

The axles and trans are weak links. But surely I'd expect axles to break with a 2jz hooked up. But at only 500whp? Must be really sticky rubber.

I don't expect the transmission to break 1-3rd. 4-6th are small though.

[SmsAlSuwaidi]

Originally Posted by Coheed

The axles and trans are weak links. But surely I'd expect axles to break with a 2jz hooked up. But at only 500whp? Must be really sticky rubber.

I don't expect the transmission to break 1-3rd. 4-6th are small though.

combination of some sticky rubber and a hard launch i guess.

i do agree both are the weak links, id bet axles before trans though. But if somebody decides to flat foot shift 1 to 2 on even 300 wheel with an aggressive clutch i bet he'd break it too

[Coheed]

Originally Posted by SmsAlSuwaidi

combination of some sticky rubber and a hard launch i guess.

i do agree both are the weak links, id bet axles before trans though. But if somebody decides to flat foot shift 1 to 2 on even 300 wheel with an aggressive clutch i bet he'd break it too

I find that strange, because most axles this size hold up to much more power. A 2-step can break them, but I wouldn't imagine 350-400whp causing much issue. I guess we'll just have to see in a year which one has more failures huh?

[crook]

Torque and shock break axels, not rated on horsepower. if your running a solid centre button clutch heaps of torque and load the girl up and drop 2nd... Expect something to give

[Sportsguy83]

Originally Posted by Silverdub

Glad to read this. I want a combo withflywheel but i dont want thr crazy nouses like clutch master. Hopefully act isnt as bad...

From an ACT owner review, the ACT is worse than the Clutchmasters for driveability because their flywheel is even lighter the CM and because of this the car about stalls everytime you put it in neutral.