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ACT xtreme and Street disc combo? Did the search.
Hey Guys,
I'm looking into purchasing used low mileage ACT extreme and street disc to go with my ACT streetlite flywheel. I've read their spec on the xtreme pressure plate and it said that it's up to 50% to 120% in increase in load clamping. How much more peddle effort will this translate too. I would like to keep the peddle effort close to stock as possible. Or is this a pipe dream with this combo? Should I just stick with ACT HD pp and street disc or go with Spec stage 2 clutch? Any feedback or recommendation would be great. Jay |
how much torque do you make? for a car on stock twins you won't need more than the heavy duty pressure plate and performance street disc.
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Very little effort increase. The combo slips nicely for traffic too. The only difference in my config is I have an RB 9.5lb flywheel.
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I think you know my thoughts on the matter but I might as well post them since this is the exact setup I am selling. I absolutely loved the feel of the XT pressure plate and SS disc and I am the kind of guy that needs something that is Daily Driver friendly. I absolutely CANNOT stand pucked clutches.
That being said, this clutch slipped nicely in traffic and held all my engine could throw at it (about 400whp). I think it is a perfect blend of streetability and performance. Of course if you are stock or near stock you don't "NEED" the XT pressure plate. The HD will do, but it certainly won't hurt you. I guess it is up to you to decide. Too bad you can't drive each of them if pedal effort is your concern. I would say it is pretty dang similar in pedal effort to my M3 which actually had a Spec stage 2. Of course I dont know how they compare across brands... |
Originally Posted by hypntyz
(Post 8426440)
ACT basically makes 2 types of pressure plate, the extreme and the heavy duty. The PP is responsible mostly for the torque holding capacity of a setup, and for it's pedal effort. I have driven both, and the extreme is NOT for the street. Driving it in traffic is a nightmare, it will wear your calf OUT in about 10 minutes. Most people buy way too much clutch for their intended use, and there is no reason you'd ever need this pressureplate for a streetcar.
In contrast, the HD pressureplate is almost like stock in terms of pedal effort, but still holds considerably more torque than stock, so it is perfectly suited to a streetcar. The disc determines engagement characteristics more so. ACT makes their standard organic full face disc which is sprung, and is the best choice for most streetcars. The metal puck discs engage much more harshly. I believe they now make SPRUNG HUB metal puck discs, and these should not be quite as harsh as the SOLID/UNSPRUNG HUB metal puck discs that were their only puck offerings until recently. Bottom line, the street/strip combo (HD pp with standard fullface disc) are all you need for a streetcar in most cases. IF you want a tire chirping, harsher engaging setup, then go over to a puck clutch, but I still recommend a sprung hub disc if you can get one. You will HATE driving the car if you go with an extreme PP, or an unsprung hub metal disc. I just down want to make the same mistake with my FD. Is it like doing a lag press or what? Shit, I don't want my left leg to get that much stronger than my right, other wise I might start walking in circles. Jay |
Originally Posted by hypntyz
(Post 8426900)
The extreme PP that I used, was like twice the stock pedal pressure, seriously. This is the kind of pressure that breaks clutch pedal bracketry, strains and wears out clutch hydraulics, bends clutch forks and breaks the (already weak) pivot ball for the clutch fork.
I mean, you could drive it all day long and be okay until you got into downtown or traffic, and then it was PUNISHING. I didnt realize it until I would go to get out of the car and my leg would be fatigued as all hell, kinda like trying to stand on your leg after it has fallen asleep and is not 100% recovered yet. And no, I am not a small guy, or a weakass. This is one of those things that people over-do because it says "extreme" or 'race" and they automatically equate that to "faster" or "better". Look at dyno plots of highly modded rotaries. Even the standard single turbo 400rwhp cars don't break 350tq in most cases, and if you look at the ACT parts list, the "street/strip" HD PP/organic disc will hold that output without a problem, and be 100% streetable. Sure, other more aggressive clutches hold more power, but at the price of driveability without looking like a jackass and becoming fatigued or frustrated. Is your experience with the FD Extreme PP specifically? It sounds a lot like you are talking about the FC (broken pivot balls were common on the FC and not common at all on the FD). I had three clutches in the FD, stock, RPS (which was like the ACT HD/SS) and the ACT XT/SS. The XT/SS was slightly more pedal effort than the RPS, but only slightly more, with better engagement characteristics at my power level. That being said the RPS was nearly stock in engagement, so the XT was slightly heavier. I drove the car in traffic everyday and it didn't bug me. The noise of the car bugged me to the point where I Dynamatted the whole car...but the clutch was fine. If you were going to hold it in for extended periods of time it had the capability to put your foot to sleep...but it wasn't all that much harder than stock to push, it just had a heavier hold. Even then, you shouldn't hold it in, you should put the car into nuetral and release the clutch and wait that way... It was easily liveable to me. Heck, my STOCK CLUTCH BMW M3 had almost exactly the same feel as the ACT XT/SS in my FD. For some reason the stock M3 clutch is pretty aggressive. The SPEC stage 2 for the M car was about exactly the same pedal feel. If your car is stock or near stock (as I said in my first post) you don't need the XT plate. IF your car is modified a bit and you are thinking of going further, it is the last PP you will need to buy (except in really extreme cases) and to me is very livable in a daily driver. FWIW I think people who daily drive a car with a puck clutch are insane... and I have to have a/c in my cars. The XT clutch was never an issue in my FD and I never received any complaints about pedal effort from others who drove it, even from my girlfriend, whom I taught to drive stick on the FD with XT PP. |
I thought the clutch added to my car, in my particular case. It was one of the nicest setups I have ever driven. I drive with many track guys and all offered very postiive feed back of the clutch setup in my car upon driving it. Other M3 guys quickly say that it "feels a lot like the M3 clutch." We still joke about that...
Under heavy load, high in the RPM range, in the higher gears your stock clutch wouldn't hold 450rwhp...unless it is some sort of annomoly. It certainly wont do it for long. I know people buy too much clutch. The XT fit my needs perfectly and I am just dissenting your opinion of it being unmanageable in a DD, and it detracting from the car. In my case, it was easily manageable and made the driving experience more fun. |
I have the clutch, with partnumber, out of the car right now....
I had the extreme plate in my Acura Integra Type R too. I needed a clutch that day to make a race and the only ITR clutch my sponser had was the extreme plate... so that is what had to go in, I liked it in that car too... I do like a heavier clutch, though I have never thought the XT plate was way too much. |
Originally Posted by cozmo kraemer
(Post 8427817)
I had the extreme plate in my Acura Integra Type R too. I needed a clutch that day to make a race and the only ITR clutch my sponser had was the extreme plate... so that is what had to go in, I liked it in that car too...
I do like a heavier clutch, though I have never thought the XT plate was way too much. |
Well, not much can be worse than a spec stage 3 with a 6 puck disk... except for the 4 puck or 3 puck... ;)
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I just had the HDMM kit installed today onto my FD. It still has the stock flywheel (turned) and man does it BITE.
FAK I thought it would be a little easier, but it will take a bit of time to get used to. I need to do a bit of pedal adjustment and re-bleed the clutch (as most shops don't usually do this step) and it should be good to go. Today was the first time I've actually been able to properly drive my new car (old clutch slipped like mad), and it was fun fun fun fun fun. :icon_tup: |
edit : realized this was the ACT extreme . I was refering to the street / strip, which is weak...
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Originally Posted by Rx-7Addict
(Post 8430738)
edit : realized this was the ACT extreme . I was refering to the street / strip, which is weak...
The ACT Extreme is a pressure plate. The Street/Strip is a disc. SS disc with Heavy Duty pressure plate = 405ft/lbs. tq rating SS disc with Extreme Pressu plate = 451ft/lbs tq rating ACT sells many clutch discs and pressure plate combos that can be matched to attain the proper torque rating required. |
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