you are risking crank walk for sure as ive seen a couple here with the extreme.. esp if you are on a seasoned block as opposed to a newly built block .. if you are making that much trq , you need to move to a twin disk
im at 600 rwhp and just shy off 500 lbs trq and the act hd has no issue holding at this power level since oct 2010 and even i should be moving to a twin disk and will shortly
__________________ BOOST LIFE IS A WAY OF LIFE
NA-T 600rwhp @19psi on 93octane tuned by alpha at induction performance
Hm... That's a good point. My block probably has a lot of miles on it. It's going to be mated with a 1jz. Twin disc is out of the question for me, I just can't bring myself to spend that kind of money on a td for the r154.
I've been running the act extreme pp for two years now with 555ft/lbs torqe. No crankwalk no problems at all. I also use a chromoly flywheel with a southbend feramic disk. I drive the car every other day or so. I don't get this whole afriad of heavy pp thing. It holds the power with zero problems for me.
I have been running ACT for the past 5-6 years and i lost about 4 engines with that clutch .
I daily drive my car , so if you put it in your car and drive your car twice a week then ...
Pull your oil pan and i am almost sure you have the trust washers sitting in your oil pan..
@Preston you just started using Southbend , you used the act for how many miles and how many years?
I drive my car everyday , i just lost a block 2 weeks ago , the dowel pin on the crank pulley started diggin into the crank when i caught it.
I have used just about every single disc clutch their is for an R154 on my car or my friends..in the past 6-7years .
I used an old act pp i had in the garage for couple days till i get my new clutch back from SB and it cost me $2500.
You don't believe me , you wanna try it on your own BE my guess and good Luck!
Act will hold the power but it will **** your crank up been there , done that.
ive used The act extreme pp as stated above for atleast 2 years with atleast 10,000 miles or more on the PP, At the drag strip I finally blew the act cluth disk up, i then sent my act extreme PP to southbend where they rebuilt my act ex pp and also built me a 6 puck feramic disk. I've currently ran this setup for about 7 months or more.
I daily this clutch. Prob have 20k on it. Also dailied the f1 stage 3 which is the knock off version and it prob had 40k on it. Low power though about 400/350tq. No issues yet. I've seen heavy rps pressure plates crank walk **** in 20k first hand. Also, I have no neutral safety switch and don't clutch in til the car is watm