Has anyone started playing with LPE's new Torque cut module for face plated and dog engagement gear sets ???

 

So.......?????


Here is a quote for Jason Haines @ LPE;

We have been doing some development work over the winter on a version of our LNC 2-step module to provide a momentary torque cut on the gear change for use with face plated, pro-cut, dog engagement and other similar gears sets in order to allow you to do a full throttle, no clutch shift.

On these transmissions you want a momentary torque cut to allow the transmission to get out of one gear and into the next. Many racing and aftermarket engine management systems have provisions for this (Motec, Bigstuff3, Bosch Motorsports etc.) so we wanted to have the same capability with the OEM GM controllers.

We are now at the in-vehicle testing stage and have been doing the testing on our 2010 LS9 Camaro SS. This vehicle weighs over 4100 lbs and currently makes over 1200 rwhp hp with both stages of nitrous (I can post a link to more details of the vehicle build if people are interested).

Here is some interesting facts;

The torque cut is a full torque cut for the length of time selected by the dial (0.025 to 0.095 seconds is the range available right now).

The engine torque is cut by disabling all cylinders from firing the spark plugs during that period of time (ignition cut).

FYI - at 6000 rpm, a 0.025 second (25 msec) torque cut is 2.5 engine revolutions and 1.25 firing events & 0.095 second (95 msec) is 9.5 engine revolutions and 4.75 firing events.

 

When I posted this thread I did not realize that the LNC-TC1 was still a prototype until after talking to Jason H. @ LPE. Here is what he posted..... Re: 2-step + torque cut box

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The LPE torque cut module (LNC-TC1) will retail for around $250. We haven't released the product to the general public yet. We are in the final prototype stages with some pre-production units in the hands of customers testing them in different applications. We plan to release the product for sale at or shortly after the SEMA show (1st week of November).

The torque cut module is designed to work with a load cell shift **** or some other activation method. The load cell shift **** is not included for $250. We are still working on the design of our load cell shift **** and should have that available around the same time. The prototypes have been all aluminum but we are switching to a Nylon outer housing. We are also looking into putting the load cell into our Momo shift *****.

Our module will work with other load cells as long as they are 0-5 volt output with a 2.5 volt centering (no load) output. Several companies have them available in this configuration.

You can also use the torque cut module with a simple toggle switch type shift lever/****.

You could also use a TPS switch and a clutch switch to make it throttle and clutch triggered.

In addition to the torque cut feature the LNC-TC1 also has a RPM limiter/2-step function.

The LNC-TC1, like the LNC-2000 and the LNC-003, is designed to work with late model GM V8 EFI LS type engines with the OEM ECM and individual coil ignitions. It may also work with aftermarket ECM's that control the OEM type LS coils.


Here is some interesting videos and graphs about the LNC-TC1.......--------------------------------------------------------------------------------

Here is a few vid's of the LPE Camaro on the dyno testing the torque cut.

http://www.youtube.com/watch?v=Fcb-JS4HAuM

And here are a few of it going down the track....unless I'm wrong this pig is in the 4100lbs+ range...

http://www.youtube.com/watch?v=ftcw2b4WM0s

http://www.youtube.com/watch?v=hWymvH5qwZU

Here is a pic of the LNC-TC1 box...

http://ls1tech.com/forums/attachment...s-label_sm.jpg

Attached is a graph showing speed vs time comparing a run with and without full throttle/no clutch shifts. The faster run (in red) was with clutch type shifts and was with two stages of nitrous. The other run (blue) is with full throttle/no clutch shifts and our torque cut module. As you can see the shifts are barely noticeable on the blue run but are readily visible in the change in acceleration on the red run (at roughly 1.6 seconds, 3 seconds and 5 seconds). We had severe traction problems at Camaro5 Fest and never ran a successful full nitrous run so I don't have data yet of the torque cut under full power (1200+ rwhp). (THIS STATEMENT WAS OF 04/30/11, SO THEY MAY HAVE FIGURED OUT THIS HICUP)

http://ls1tech.com/forums/attachment...pare-graph.jpg



I mean seriously....this is the cats meow for us factory ECU guys. Faceplated T56 and quality twin disc (BC2, RXT) and a 2 step/torque cut box with a FJO timing controller and a "big" shot. Wow...I can't wait !!

Here is the link to some of the earlier discussions this year about the development.

http://ls1tech.com/forums/manual-tra...gear-sets.html


Thanks....