im having high rpm lock outs wid hks gd pro twin ...

i can never engage gear fastly at high rpm ...

wat ive been told is that my clutch is not working properly so i just ordered quarter master twin now and will be installing in this week ...
i hope ill solve my problem now ....

 

I have an ACT 6 puck installed perfect by my friend who worked at mitsubishi and it locked out on me. My driving is fine so that is not an excuse. After a front motor mount it went away. Sorry but I have to blame the clutch. They all do it so expect to buy a motor mount.

 

Wierd, I have the exact opposite problem, I have an installed by me, so I guarantee it isn't fugged up, 6-puck unsprung center disc, had it with a motor mount and no motor mount and the car/me has never had a problem.

Must be a hit or miss thing.

 

i have the acthdss for a yaer and a half...i've put 25 - 30k miles on it and it has never locked out at high rpm..i've switched as high as 8grand

 

I would like to ask a ?

What is YOUR version of "Lock-out" ?

Is it like this ....
1st gear----WOT----red line(7K +)----push clutch pedal in/shift as fast as you can----shifter moves back and stops----release clutch pedal and your not in 2nd gear/grinded 2nd (aka miss a shift) .

That has happened to me on my
Evo8 with stock clutch
Evo8 with stock clutch + redline fluid
Evo8 with stoch clutch + syncromeash(sp)
Evo8 with Exedy twin + syncromeash(sp)+fr motor mount+short shifter
Evo9 with stock clutch
Evo9 with stoch clutch +Amsoil

Its only when I shift FAST , if I shift a lil slower its been fine in all of my set ups .

Am I getting "lock out" or is the "ACT lockout" a different and bigger prob ?

 

this thread is concerned with ACT clutches and how they have got the rep of always having high rpm lockout when thats not the complete truth...

have you ever adjusted your clutch? if not that might help you with shifting FAST adjust it as far out as you can and you'll get the most fluid flow to your slave cylinder.....

seems like you are mis shifting bc high rpm lockout you usually have to wait for the rpm to drop before shifting but if you can still shift smoothly at high rpm that must not be lock out maybe just need to practice shifting fast at high rpm

 

"What causes High RPM lockout on ACT clutches"

I would like to know what everybody's defintion of "lockout" is .
Yours might differ from mine and everbodys elses .
*If* Iam getting "lockout" it not the ACT/stock/Exedytwin clutch it my shifting .
I just would like a reference point .

Yes adjusted clutch .

"Pratice makes perfect" , but never had this problem on other cars .

 

I have installed quite a few ACT clutches and I really like the quality on them. I had one on my Subaru and had no issues with it and it lasted quite a long time. I do like how the Evo HD organic clutch engages, almost feels like stock, engages very smoothly. Yes I believe installing this the correct way will make a huge difference. I have pulled out some used ACT's that had lockout and all of them had some issue like a warped pressure plate. That could have been prevented by breaking in correctly, launching correctly etc.

 

ACT is known for this plain and simple no matter what excuses fly.... SO why don't they try to address and fix it?? I mean I dunno but that sounds like the right thing to do.. But it is what it is... its a single disc clutch and your not going to get the shift quality u will get from a "good designed" multi disc clutch for many reasons I don't have time to set here and explain. I'm sure there are enough internet smartys to figure it out and comment either to hate or hug or to simply add reliable information And Im not going to say i know it all about clutches... As i dont. But I have owned more clutches over the past 14 years of my driving then I want to even remember!!! i have alot of experience with different clutches and how they perform plain and simple.

Now here is something that bothers me.. I find it funny when manufactures ignore there issues and try to act like its not an issue and theres NOWAY its the clutches fault its always the users!! OR when they put cars in there signature to boost there company that didn't even run those times on there clutches!!!!!!! UNREAL! LOL. I know I have wasted alot of $ on ACT clutches in the past as I have been doin this DSM/Mitsu thing for well over 10 years now and built MANY MANY 4g63 powered cars. Now back in the day the ACT was basically the best clutch u could get "that was affordable" So therefore everyone and there brother had them and they built a big name for themselves in the mitsu community! Well now there are better suited clutches for the abuse and RPM that people are putting there cars through... and the price for these units are getting cheaper as well. A QM is a noisy harsh unit but it does its job VERY well. Or u can spend a more $ and get a Exedy twin and have a smoother and more quite and driver friendly clutch to drive around that will shift and hold power. It's all in what fits your needs and how much fundage u have to spend. These are my views and if you dont like them im sorry. But this is what I have experienced 1st hand.

 

Exactly, maybe they should make a disk that does not warp so easy. This kind of problem is just non existant with other manufactures.
A heavy duty clutch from an advanced clutch manufacturer should hold up to a stock power car useage.
I really love the "less then 2% have problems" load of crap. There are vendors out there that aim for 0% problems.

 

Since when does owning and driving clutches of diffrent brands qualify someone as an expert on clutch design or even how they work? As I 've said there are no shortage of engineers on here that "know" enough to be be dangerous.

And as far as your comment about cars that we sponsor, currently or in the past in my signature, that is laughable. It's called sponsorship and what that means is in exchange for money, the people we sponsor run our logo. It works much in the same way Mopar sponsors a top fuel car or Ford sponsors John Force. There are as many Mopar or Ford parts in those cars as there are in my Evo.

So for the record Brent has a slipper clutch made by East West and John has a Tilton in his car both bought and paid for by ACT along with other monies that supported both of their racing efforts over many years. By payng both of those guys it give me the right to say that we sponsor them. In case you missed it my signature says "sponsors of", not " our parts were used by".

 

In case you missed it, we do. It's called a "race" disc or puck disc and it is designed to hold up to more heat and abuse than a organic disc. Which if you've been reading this thread like I know you are you would see that the majority of the lockout issues reported are on the "street" disc which has a lower threshold for heat. An organic disc is not immune from the laws of physics.

It also appears that you also missed my % reference that you're attempting to quote, it was used as an example for reference, not a statement of a goal that we strive for. Every manufacturer aims for 0 failures I know of non that can claim that. But thanks for the witty puns and play on our names.

BTW what was the point of your original post? To attack ACT? Start yet another " I hate ACT thread"? it seemed that the original intent of the post was for information which has turned into a play on words. We've answered your questions a few times over so what's your agenda?

 

I've been rocking a ACT HD street disk w/ ~480whp for over 20k miles w/o any issues shifting at high RPMS. Proper break-in, install, and driving go a long way. I actually have a 6 puck ready to go in

 

well, I will back ACT 100% I have installed 30+ ACT clutches over the past 10 years on various cars (mostly Toyotas), and I have been nothing but impressed with them.

I did have one experience with an ACT clutch I was not happy about. I too have experienced the high speed lock out that everyone here is complaining about even though my clutch was "installed perfect" with the pedel "exactly right" I b*tched and complained about what a crap product the ACT clutch was to everyone within ear shot, then in a last ditch effort, I re-adjusted my clutch pedal and flushed the fluid and like magic the lock-out issue went away.

I shuffled my feet anytime someon asked me about my clutch problem, and I had to explain that it was my fault not ACT's

Even though I am currently having a clutch problem, which can be read elsewhere on this forum, and it involves an ACT clutch, my problem has NOTHING to do with ACT's quality or product support. It has to do with my own stupidity.

The reason you hear everyone complain about ACT's with the lock-out issue is because there are so many more ACT's out there. It's also a very reasonably priced clutch for it's performance, so the shade-tree mechanics who "know everything about cars" are buying them up left and right, resulting in many out there there that arn't installed properly. The typical garage mechanic with limited skills is not installing the pricier more complex multi-plate designs.

Just my 2 cents.

 

Even though i was displeased with the clutch at the start, now with the bushings, etc.. I love it. Seriously I would buy this clutch again because you cant beat its value, also I'm not ready to pay $1000+ dollars more for the exedy twin over the ACT. If this clutch can do the job with the help of some bushings and other stuff that only makes the car better, I'm all for it.