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clutch for Lenco

Posted By: Georg

clutch for Lenco - 10/22/11 01:45 PM

is here someone who uses some other brand clutch for Lenco tranny? Hydraulic pedal ones? I heard that Lenco`s own clutch needs to grind surfaces after some runs, it needs special grinding machine and so on...
What do guys who use Lenco in street/strip cars?
Is there some alternative or not?
Posted By: B1Johnny

Re: clutch for Lenco - 10/22/11 01:54 PM

hi Georg,i use a ram billet 10 inch dual disc. i bracket race with it.every other time out i pull it apart and sand the discs to get theglaze off. if i am at a two day race i will zero it out at the end of the first day.hope this helps
Posted By: Rich970

Re: clutch for Lenco - 10/22/11 03:21 PM

what do you mean by zero out ?
Posted By: Georg

Re: clutch for Lenco - 10/22/11 06:34 PM

and it cost some 3500 dollars!?
Posted By: gearjammerdart

Re: clutch for Lenco - 10/22/11 07:25 PM

Quote:

what do you mean by zero out ?




Adjusting the ring height back to the original setting. As the clutch slips it wears the disc so you adjust the ring height this way you can keep track of your pressures.

Donald
Posted By: B1Johnny

Re: clutch for Lenco - 10/22/11 07:46 PM

hey rich the discs wear about .004 per pass,they give you a dial indicator with the clutch you loosen the nuts on thepressure plate and reset the ring height,by adjusting the stands using the indicator.then you set the air gap by adjusting the linkage.the clutch cost me 3500,and you need a race pak or some other form of data to see when it is locking up.you can change that bybase pressure or counter weight pressure.
Posted By: bigtimeauto

Re: clutch for Lenco - 10/22/11 07:48 PM

you could also just ditch the clutch if its to much work for you and put a converter drive in front of it.
Posted By: Rich970

Re: clutch for Lenco - 10/22/11 09:05 PM

Thanks John for that info.
Posted By: Rich970

Re: clutch for Lenco - 10/22/11 09:19 PM

Quote:

Quote:

what do you mean by zero out ?




Adjusting the ring height back to the original setting. As the clutch slips it wears the disc so you adjust the ring height this way you can keep track of your pressures.

Donald


thanks Donald. sorry to get off the original topic. dont they have dual friction clutches that can be used with the lenco that need less maintenance?
Posted By: mopar_mark

Re: clutch for Lenco - 10/22/11 09:36 PM

Georg,
Are you considering to run a CS1,CS2 type Lenco or are you referring to the 1200 Street model ?

Think it would make a big difference on clutch selection, although cost will be similar, something like a Bonafante will be around $3500. But will need maintenance/checking, but less so on a mainly street application. Then again, what sort of HP you looking to put through it.

A bruno type Lenco, with a converter, as mentioned earlier is another option to consider
Posted By: Georg

Re: clutch for Lenco - 10/23/11 07:42 PM

Quote:

Georg,
Are you considering to run a CS1,CS2 type Lenco or are you referring to the 1200 Street model ?

Think it would make a big difference on clutch selection, although cost will be similar, something like a Bonafante will be around $3500. But will need maintenance/checking, but less so on a mainly street application. Then again, what sort of HP you looking to put through it.

A bruno type Lenco, with a converter, as mentioned earlier is another option to consider




Actually CS1, CS2 or 1200 model choose is still pending. My motor makes around 850hp as naturally aspirated right now but future plan is to use turbocharger...so chooseing is hard. Probably its gonna be CS1 or CS2. Lenco is far not cheap tranny and I want to make correct pick up first time so I can use it later on if motor picks up more horses
Posted By: 23T Hemmee

Re: clutch for Lenco - 10/24/11 05:12 AM

Georg,
You can put any type of clutch in front of a Lenco that they make an input shaft for. You need to pick a clutch for whatever you're mostly using the car for. If street, you need a street clutch, if street/strip, or strip only, pick a clutch designed for your HP and car weight. The CS1 and CS2 will take anything you can throw at it, up to 3000HP for the CS1. The CS2 is a slightly smaller case if you have space limitations but will still handle 2500hp. The ST1200 is just that, a street version thats rated at 1200hp. They use aluminum cases instead of mag like the race versions and 8620 material for the gears instead of 9310. The 8620 is the same material used in most ring and pinions and is a little harder for better wear on the street. Thats how Lenco can get the cost down a little for the street version. One thing to consider is heat buildup with the Lenco if you are doing a lot of cruising, I know my CS2 doesn't have any provisions for fluid cooling although the ST1200 might. BTW, I'm running a Bruno convertor drive in my altered and honestly think it would be streetable if I were to put it in a bodied car. You might want to look at a Lencodrive also, roughly same size as a glide in 2-speed configuration but you have the flexibility of adding more standard CS2 sections to it to make a 3-4 or even 5-speed. All it takes is dollars.....
Posted By: Georg

Re: clutch for Lenco - 10/24/11 06:09 AM

Quote:

Georg,
You can put any type of clutch in front of a Lenco that they make an input shaft for. You need to pick a clutch for whatever you're mostly using the car for. If street, you need a street clutch, if street/strip, or strip only, pick a clutch designed for your HP and car weight. The CS1 and CS2 will take anything you can throw at it, up to 3000HP for the CS1. The CS2 is a slightly smaller case if you have space limitations but will still handle 2500hp. The ST1200 is just that, a street version thats rated at 1200hp. They use aluminum cases instead of mag like the race versions and 8620 material for the gears instead of 9310. The 8620 is the same material used in most ring and pinions and is a little harder for better wear on the street. Thats how Lenco can get the cost down a little for the street version. One thing to consider is heat buildup with the Lenco if you are doing a lot of cruising, I know my CS2 doesn't have any provisions for fluid cooling although the ST1200 might. BTW, I'm running a Bruno convertor drive in my altered and honestly think it would be streetable if I were to put it in a bodied car. You might want to look at a Lencodrive also, roughly same size as a glide in 2-speed configuration but you have the flexibility of adding more standard CS2 sections to it to make a 3-4 or even 5-speed. All it takes is dollars.....



Thanks a LOT Ronny for detailed answer! One thing I dont understand about Lencos and that is - why the hell they cost so much!? They are actually very simple transmissions...
Posted By: Cab_Burge

Re: clutch for Lenco - 10/24/11 07:42 AM


Thanks a LOT Ronny for detailed answer! One thing I dont understand about Lencos and that is - why the hell they cost so much!? They are actually very simple transmissions...


They cost that much because racers will pay that much Have you look for used ones anywhere? At one time you could find them in National dragster occasionaly, epsecially when Pro Stock went back to conventional transmissions with slipper clutches years ago
Posted By: Georg

Re: clutch for Lenco - 10/24/11 11:17 AM

Quote:


Thanks a LOT Ronny for detailed answer! One thing I dont understand about Lencos and that is - why the hell they cost so much!? They are actually very simple transmissions...


They cost that much because racers will pay that much Have you look for used ones anywhere? At one time you could find them in National dragster occasionaly, epsecially when Pro Stock went back to conventional transmissions with slipper clutches years ago



I searched used ones from racingjunk.com There are couple but its quite risky especially when I cant see what I buy...only pictures and nice description may be errant
Posted By: 23T Hemmee

Re: clutch for Lenco - 10/24/11 03:12 PM

Georg,
I agree, they are simple transmissions, but they are pretty much bulletproof, you can spend almost as much on a Powerglide that will handle close to the same HP but you would be rebuilding it every 10-15 passes.

A better source you might look at is:

http://www.insidetopalcohol.com/forumdisplay.php?13-NRE-X-1-Heads-Free-Classifieds

Got your PM, going to be out most of the day today, but when you get a chance give me more info about your car and what type of usage you intend to do with it. I'll try to help any way I can.
Posted By: Challenger 1

Re: clutch for Lenco - 10/24/11 07:56 PM

I use B&J trannys,same strength as Lenco.
We resuface the clutch disc and floaters every run!
Use to have portable clutch grinder that we took to the track, but it is not accurate enough.
Bought this 11K surface grinder to do the whole clutch assy including the pressure plate and flywheel after every race. We would put together enough clutch packs for the race before we leave the shop.


The clutch grinder.

All the fixtures to maintain your clutch.

Tool to check my work. It isn't cheap to run a clutch on the race track.

Posted By: FastmOp

Re: clutch for Lenco - 10/24/11 10:26 PM

That's the many reasons I went Bruno drive!
Posted By: Challenger 1

Re: clutch for Lenco - 10/25/11 01:34 AM

Quote:

hi Georg,i use a ram billet 10 inch dual disc. i bracket race with it.every other time out i pull it apart and sand the discs to get theglaze off. if i am at a two day race i will zero it out at the end of the first day.hope this helps




When I started racing alcohol, we would zero the clutch after the first run and then run it again and see how much it got eat up. Sometimes we would go 3 runs. It was way more fun racing then, with only 4 guys.
Then came screw blowers(Wipple) and we were lucky to get 2 runs. Then came the PSI blowers and the clutch get's fried every run. And it took 6 guys and me to maintain and race the car.

If we really miss the tuneup with it we can fry a set of brand new floaters with one run and they won't clean up even with our hi dollar grinder because of hot spots.

It's like money. I never got attached to any of my race part's.

This run the clutch was perfect, super smooth but the motor had a bit more bottem end because we retarded the cam just 1.5 degees right before this run. The car has a 11 gal fuel tank all the way up front plus I have 49 LBs of lead plate in the nose also and it still did this. We added more weight to the front after this run. I pedaled the car down with out hurting any wheels or tires, luckly.

Posted By: bigtimeauto

Re: clutch for Lenco - 10/25/11 05:04 AM

^^^^^^^^^^and all of this is why i said converter drive.
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