My friends new PI trqe converter!

propellerhead · Oct 24, 2005

Someone told me the PI converters are noisy and they click. Can anyone confirm or deny that?

And that's 200-300 bucks that can be put towards another mod.

ProCharger GT · Oct 24, 2005

propellerhead said:
Someone told me the PI converters are noisy and they click. Can anyone confirm or deny that?

And that's 200-300 bucks that can be put towards another mod.

It's worth it for the triple disc

And as far as being noisy, it's hard to tell - my tranny shifts really hard, and that is loud..so..duno.

Dark Knight GT · Oct 24, 2005

propellerhead said:
Someone told me the PI converters are noisy and they click. Can anyone confirm or deny that?

And that's 200-300 bucks that can be put towards another mod.

I've never noticed any odd noises with my converter, such as clicking. I do know that my shifts are pretty firm though.

True, the extra 200-300 dollars can be spent elsewhere, and that is rational logic. However, it is sometimes better to spend a bit more, and get a nicer quality piece that will last longer, and be more durable in the long haul, than it is to go "cheaper", and end up having problems in the long haul. Not saying you're going to "definately" have problems with a single disk, but a multi-disk would definately last longer and more effeciently under times of stress.

ProCharger GT · Oct 24, 2005

Dark Knight GT said:
I've never noticed any odd noises with my converter, such as clicking. I do know that my shifts are pretty firm though.

True, the extra 200-300 dollars can be spent elsewhere, and that is rational logic. However, it is sometimes better to spend a bit more, and get a nicer quality piece that will last longer, and be more durable in the long haul, than it is to go "cheaper", and end up having problems in the long haul. Not saying you're going to "definately" have problems with a single disk, but a multi-disk would definately last longer and more effeciently under times of stress.

Agreed and I will also put it this way - when the designer of the 4R70W tells you to buy "a PI triple disc" converter I'm not going to question him - yea Jerry Wroblewski

big T · Oct 24, 2005

propellerhead said:
What do you mean by wanting to shift a bit more than stock? Like earlier? Later?

I've been considering a single disk. I know there are some strong sentiments for the multi disk on some boards but I also hear many single disk users that have no problems at all. What kind of price difference was it between the multi and single?

I guess shifts a bit more cause Im under the stall rpm(mines is a single disc/3200 stall) and cruising around town at 2000-2500, its never reaching the stall speed...It shifts earlier, but not too much different than when stock. Hard to explain, but if u mash the gas (like racing) it will hold shifts longer and when cruising it goes thru gears faster. U have to set up your shift points to what u like and its best to use a track to do so that way u can see better E.Ts.

propellerhead · Oct 24, 2005

ProCharger GT said:
Agreed and I will also put it this way - when the designer of the 4R70W tells you to buy "a PI triple disc" converter I'm not going to question him - yea Jerry Wroblewski

I'm not gonna question that statement either but does it apply to those under 300 rwhp who have no plans of getting a power adder? I'm thinking it's overkill. The best is great but it costs $$$. Why get a blow torch when you just want to light a candle? I'm still trying to find out if I'll be ok with a 3200 single disc.

Dark Knight GT · Oct 24, 2005

If you get a single disk converter, get one with a high carbon friction lining. High Carbon friction linings are stronger in terms of reliability and will last longer. Most single disk converters that are for mild hp applications(under 300hp) will use a raybestos tan material. Raybestos is "all around" good, but not as strong as High carbon. So, for the single plate, go high carbon just to be sure.

P.S. I still say if you can afford a multi-disk setup, it wouldn't hurt to invest in one. Either way, its your choice. Its kind of like how I upgraded to a 31 spline setup for the rear. Was it needed ? Probably not, but I would rather be safe than sorry in the long run.

propellerhead · Oct 24, 2005

I actually had my mind set on a PI multi disk 3200. But I just have to investigate other options.

Who makes a single disk that uses high carbon friction linings? I know Art Carr uses the Raybestos stuff.

Dark Knight GT · Oct 24, 2005

I know of a couple companies that uses a high carbon friction lining. West Coast converters uses them if you ask for them. Though I'm a little hesitant about recommeding the West Coast converters due to one simple fact, and that fact being WCC uses a smaller clutch piston than stock to lock the torque converter up. How big of an issue this is, I'm not sure.

There is another company that makes something called the "Interceptor/Dominator" torque converters, and I believe they use a high carbon friction lining as well.

Dark Knight GT · Oct 25, 2005

A little update. I did find out some information regarding the torque converters I mentioned above. Accordingly to a PM I recieved from Dirtyd0g(Alan) over at Modular Depot, those torque converters being sold and labeled as "Interceptor/Dominator" torque converters are just rebadged Precision Industries torque converters. Alan informed me to avoid them. I'll see what else I can find out.

propellerhead · Oct 25, 2005

Man, the single vs multi disk threads on Modular Depot are fierce.

Dark Knight GT · Oct 25, 2005

propellerhead said:
Man, the single vs multi disk threads on Modular Depot are fierce.

I could of told you that.

03ghoststang · Oct 25, 2005

im convinced i am going to see from who i can get a multi disk PI TQ conveter form this X-mas

ProCharger GT · Oct 25, 2005

good choice

Dark Knight GT · Oct 25, 2005

After reading some of the threads over at MD concerning a multi-disk setup, I have to believe that if you want to lock the car up at WOT before and after shifts, it is important to have a multi-disk setup. Why ? Pretty simple. A single disk can "hold" a torque converter in the locked position at WOT just fine. However, getting it to lock in place with a single disk is very difficult, and usually results in slippage. Overtime, the slippage just takes its toll on the single clutch plate, and burns it out. A multi-disk setup should prevent this, as it will be using multiple disks to lock up the clutch, and not just one having to bear the stress all on its own. If you don't believe me, do some research on it. Dirtyd0g and Johnny Langton both have tons of threads on the subject at Modular Depot and at the TCCOA forums.

propellerhead · Oct 26, 2005

That sums it up pretty well. However, there are many who have high horsepower with single disc converters who lock it up. At the same time, there are those who run at the track with nitrous and still have the factory converter. Also, the single disc ones are known to use higher quality clutch material. The multi disc one is also known to have standard quality clutch material.

At this point, I would have to add: If you can afford it or have 300+ rwhp or plan to race it a lot, get a multi-disc. If you are on a tight budget or only race occassionally and you have less than 300 rwhp, get a single-disc.

Dark Knight GT · Oct 26, 2005

Well, Propellerhead, if you're going to get a single-disk torque converter, I wish you the best of luck with one. Johnny Langton bought a PI single disk torque converter, and managed to blow his. He was only making around 230-240rwhp. He even made sure the line pressure feed to the torque converter clutch was at its maximum. It still didn't hold.

I'm going to pull my Precision Industries torque converter, and send it to Dirtyd0g so he can convert it to a multi-disk setup. I'm pretty sure I've got the choice of what quality clutch material I want him to use for the disks.

propellerhead · Oct 26, 2005

Single disc converters can't be that bad. All the stock ones are single disc, and there are thousands of those running at the track all the time. Check out other message boards sometime. There are many track only high horsepower cars that are running single disc converters. It's probably like axles. Some break at 250 rwhp. Some last forever with way more horsepower than that.

Redsnake2 · Oct 26, 2005

Thanks guys I'm about to have my tranny rebuilt w/ and new stall converter. Going with a 2500.. Going to mock up my TT system then limp the car over to the shop

TGJ · Oct 26, 2005

Ok a few things:

1) PI triple discs can be noisy as hell. They make a clattering sound. I have heard of people having PI triples which do not make any noise. This noise is only evident in the PI triple disc setup.

2) As you increase your stall speed, with say a stock lock-up clutch, you are creating more stress on it. Your car is making more power at say 3000RPM than it is at 2400 RPM.

3) With so many junk single disc's TC out there, it would be wise to invest in a multi-disc setup regardless of mods done to the car. Before anybody just goes out to buy a PI triple disc setup, investigate the 4 disc setup from Circle D Industries or the 5 disc TC by Alan Brown( Dirtyd0g ). If you are dead set on running a single plate TC, buy it from Alan or CircleD. They are the only companies I know that are making quality single discs and you are going to have to increase line pressure for the TCC at lockup.

My friends new PI trqe converter!

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