I'm going to cut and paste from another thread to this on just to keep the info in the right place.
DropTopPony said:
Lonnie,
For my setup i was thinking i would need a multi disc or very good single...i will be @ 400rwhp/400rwtq alot of it down low in the rpms (PD Blower).
I'd like to have it be able to last as a dailydriver and hold up under the once a month street night 1/4 mile blasts. What do you suggest?
Also did JL send you over here? This is a good forum to sell your product....it hasn't been tapped yet
Maybe you should consider becoming a Sponsor and hooking us up with nice discounts.
For a PD blower you don't want to get crazy with the stall since you've got a lot of low end torque with these setups. It sounds like you’re going with a base kit. Chances are a little boost won’t be enough for you, it never is for anyone. They always want more power later on. As for stall, I would keep it below 3400 rpms. With a 450 – 500 rwtq 3200 rpm would work out great. A good single disc would such as my Stage III 9.5 inch would hold up just fine and more than likely be your last TC purchase for that vehicle. The Stage II that I’m currently working on will be a billet also and may be a cheaper alternative but it hasn’t been tested yet. If you don’t plan on exceeding 500 ft lbs then it may work out just fine for you.
You don’t need a multi disc for that level of power. The whole idea behind the multi disc is more clamping, holding force by having multiple friction surface areas. Most TC manufactures won’t mess with them for a gasoline vehicle because they can’t put out the torque a diesel can. So the only design multi disc setups are for diesels. Most factory diesel trucks now come with multi disc by the way. PI has a good design, it’s light and the actual mechanics of it work. The problem with theirs is that the piston flexes when applied and they use the paper thin friction material that won’t hold up. I’ve seen too many of these just burn up and contaminate the fluid causing transmission problems. Now if you come across a used one it may be worth having it relined with better friction material. I can have that done for you also. There’s a couple other’s out there that offer a multi disc but they are very heavy and as I found out the hard way don’t hold up.
With these type of TCs you have to keep the weight down and that’s hard to do with all the parts involved with them. Also size is another problem, you have to get all those parts inside that TC which is a small space. To do this they have to decrease the size of parts going into it. This includes the frictions. A lot of times the amount of friction surface area is only increased slightly over a single disc. The PI multi disc actually has less surface area than my Stage II single disc and it will hold up to more power than the PI.
With these two 10 inch TCs I’m working on they will be designed specifically for the budget minded without sacrificing the good parts. This week my builder will be taking the specs we came up with and assembling a product for testing. The Stage I will be a major step up from the stock Mach 1/ Marauder 11.25 or what other companies offer by relining these TCs. It will have 30 inches of high carbon friction material vice the 18 for much better holding capability. Using an 11 inch front cover and 10 inch pump. Upgraded bearings and new turbine hub and is designed for the 350 – 400 ft lb applications. Where as the Stage II will be will be an upgrade with billet front cover, with some other strengthening parts installed to hold up to 450 – 500 ft lbs.
No JL didn’t send me here but I know him, he’s a good friend of mine. I think he’s still running a TC from the same builder I’m using for these new TCs but a much more pricey unit. I initially didn’t come here to sell anything. I was asked to come here but 3 different guys 2 were customers but all three where getting conflicting answers for people. I was told that Dallas Mustang was already a sponsor but they don’t interact with the site unless they are selling or have a sale. My idea of a sponsor is someone that also interacts with the site. I sent an email and PM to the site’s admin to see what it takes to become a sponsor but haven’t heard back.
