How much whp can a stock evo 9 mr 6 speed transmission handle safely? Im currently on e85 making around 430whp nd 390tq? Also is xtd clutch anygood? Saw one on ebay for $189 thw guy is selling them very cheap. Looks fishy. Any ideas?

 

https://www.evolutionm.net/forums/ev...eed-still.html

 

I don't know if this will help much but it's not WHP that you need to worry about. It's more the WTQ and how you drive your car. I have a 6 spd and have done a few track days and time attacks but I try to be careful how long I'm in 4th gear and the heat. The closest track to me is CMP where you're in 4th a lot. I usually do a warm up lap 2 hot laps and a cool down lap per session. I know its only its only a matter of time until 4th goes anyway. As for numbers some are luckier then others. A trans cooler might help too.
With the clutch you typically get what you pay for. I went with the Exedy twin and it's been great for both street and the track. Use your gut with Ebay deals, if it looks fishy stay away.
Hope this helps

 

It could handle plenty if you drive it properly. I have seen 6spd handle more power than what you made.
And $198 clutch sounds like... well... why don't you try it out and get back with us. I have never seen one so... err... cheap.

 

Hahah yeah it sounds a bit fishy. How long can the stock clutch handle 400tq nd 430 whp ? So 4th gear is the one that goes away first? I would of though the 6 speed can handle 400wtq?

 

No one here knows how you drive, how often you launch your car, etc...

A couple bad launches on a completely stock car can kill your stock clutch within a matter of a few seconds/minutes.

I'm still on my stock clutch currently at 46k miles, was pushing a tad over 400wtq for the last 17k miles, and its still holding strong. My car is solely a street car though, never tracked, and never launched.

 

It's a combination of how abused the equipment is and how much you are asking it to do. I got my MR used and the previous owner had clearly been launching it regularly. The stock clutch burned out almost immediately after I got it. The stock transmission lasted one DE at ~400 whp before 4th gear went out. How much of that was due to me and how much was do to the previous abuse? Who knows.

I have a 5-spd Shep ultimate ratio now and I love it.

 

Another weak point is if you miss 3rd and mushroom the 6th slider then you dont have 6th gear anymore. I just found this out yesterday, the hard way. Hit 1 to 2 perfect, went to 3rd and had the clutch in and the shifter went somewhere between 1st and 3rd. I backed off the shifter released the clutch then pushed back in and it went into 3rd easy. Got up to speed and guess what, no 6th. Did a little searching and if you miss 3rd enough you'll screw up the 6th gear slider and it wont go in, period. So now I got a mr 5 speed the crappy way. Buschur or Shep here I come. Shep builds great box's but the mr is odd as from what I hear he waits to do a run on them. The ones that want the best build anyway, new gear ratios and final drives. I just dont want to spend the cash and do the same thing again. I want some upgrades for piece of mind. By the way my car is second hand so I dont know how much someone else helped out. And I do not launch. I'm making 400whp and 365whtq on a mustang dyno with a fp green. And I plan on a retune soon as my tq hits hard and quick and thats what breaks stuff quick. GL fellow mr owner

 

Blackenedwings, what's your cruising rpm at say 65mph with the new 5 speed? I had a 03 and I really like the 6 speed better but might consider a swap. I only dd my car and dont launch or track but do like the occasional no lift shift.

 

check with TRE - had my 6 speed built there, very happy with it. I won't have the torque numbers that you guys will have though

 

I absolutely despise these "6-speed is weaker" nonsense.

It isn't DRASTICALLY weaker, it's a function of putting a greater amount of metal, into a similar size housing.

The real issue is, that the 4G63 is such a capable motor, and the entire Evo platform is so cheap, and highly modifiable. What you end up with, are a bunch of people that have a relatively low amount of experience driving a stick, with a relatively high amount of performance, and you end up with all sorts of issues.

That combined with the fact that the MR (6-speed) was iirc the most popular selling Evo 9, so there are a relatively good amount of them out there that people owned and tried to make ASTRONOMICAL amounts of power out of. Boom.

Anyway... I'm the third owner on my 9. I have the 6 speed. The first owner used the car as a dedicated track car. The second was a yobbo, and I'm one of those Evo lifers (had a Mirage I built into a 5). It makes ~305 whp/wtq, and (now) has about 1000 miles on a CC stage 2.

It's a pedal, not a button, and you're a driver, not a robot.

 

OP... to answer your clutch question.

I won't recommend a clutch, because I'm not sure what your goals/driving style is/are. BUT, I will say... if you're going to do the clutch, don't skimp on something cheap. Not only is the clutch job a BIG job to do yourself, it's VERY expensive to have someone do it (labor). So you'll want to be sure you're getting a quality piece in there that won't grenade, and frag your transmission. Because that will be on you, and have nothing to do with 5 vs. 6 speed.

 

what's a yobbo?? that's honey in korean

 

yeah thanks guys i was just wondering might get a act hd soon here. Pulled out my motor today and my valves are bent getting new ones and im gonna do the clutch too, Does the ACT HD let any slipping?

 

ProPilot04, not my first stick. My second evo and I have had some nice dsm's also a 2000 ls1 camaro, etc..
**** happens and this is the price we ALL pay in some way or another when having a high performance modified car that we enjoy driving to limits.
So what is your secret for longevity in your 6 speed? Any good advice? Not being sarcastic, just my first 6speed evo and really like it. Just want to make it the best it can be.
I dont do no lift shifts or launch by the way. I like having but I'm not stupid with my cars. I take better care of them than I probly do myself.
OP, I've had excedy twin and some act singles and for dd and street use I prefer a single disk clutch. Just use a proven one!