Torque cut module for face plated and dog engagement gear sets
05-05-2011, 10:36 AM
#41
Mike
Last edited by Mikey 97Z M6; 05-05-2011 at 10:41 AM.
05-05-2011, 12:14 PM
#43
LS1Tech Sponsor
Thread Starter
Torque cut method 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.
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.
05-05-2011, 12:15 PM
#44
LS1Tech Sponsor
Thread Starter
GMPP E67 ECU and LPE LNC devices Yes, the LPE torque cut module (and our other LNC 2-step type devices) will work with the E67 ECM and should work with any system that uses the OEM GM type coils.
Will this add on device work with the GM Performance Parts swap ECU and harness package? It uses the E67 ECU.
Here is another shifter **** option:
http://www.holinger.com.au/*****.php
I have no clue as to the cost, but it looks nice.
Andrew
Here is another shifter **** option:
http://www.holinger.com.au/*****.php
I have no clue as to the cost, but it looks nice.
Andrew
05-05-2011, 12:23 PM
#45
LS1Tech Sponsor
Thread Starter
Torque cut for clutch type shifts We have some customers that have used our standard 2-step modules to cut the torque on the gear change to improve the response/reduce the shock when they do a no lift shift while still using the clutch. They have reported good results doing this but we have not tested it ourselves. This is also done fairly often by some of the import drag racers.
If you have our LNC-001, LNC-002 or LNC-003 2-step tied into the clutch pedal switch then it will activate on each shift (unless you are using our MPH switch to deactivate it once you are moving).
NOTE - it is my understanding that, as someone else already pointed out, the MSD 2-step uses a latched type logic that expects to see an specific RPM drop before the 2-step is activated again so it will not work this way.
If you have our LNC-001, LNC-002 or LNC-003 2-step tied into the clutch pedal switch then it will activate on each shift (unless you are using our MPH switch to deactivate it once you are moving).
NOTE - it is my understanding that, as someone else already pointed out, the MSD 2-step uses a latched type logic that expects to see an specific RPM drop before the 2-step is activated again so it will not work this way.
05-05-2011, 09:25 PM
#46
The MSD 2-step Launch Control does NOT cut spark between shifts,,, I would like to make that perfectly clear. Once you launch off the 2-step, the rpms need to drop by 1/3 of the set launch rpm before it re-sets itself into "launch mode". So if you're leaving off the line @ 6k, the rpm's would need to drop below 4k before it would limit rpm's again, but only when the clutch pedal is depressed.
Mike
Mike
05-16-2011, 04:39 PM
#50
LS1Tech Sponsor
Thread Starter
07-30-2011, 02:47 PM
#53
LS1Tech Sponsor
Thread Starter
More torque cut module testing Here is a video of our no-lift shift module (LNC-TC1) being run in our Camaro at the Lingenfelter annual track day at Muncie drag strip earlier this month. These are wide open throttle clutchless shifts.
Link to in-car video on YouTube.
Here is a link to a much longer video from our track event. 1st two passes show the in car and then an external shot from the vehicle. I don't recall if any other video from that car are in the video.
LPE track day summary video.
I will post some of the VBox acceleration data as well (when I get time to make the graphs etc.).
Compared to the previous videos/testing, we changed to a more sensitive load cell shifter (less load for the same voltage output). We also changed to a new transmission. It is a faceplated TR6060 with straight cut gears. The gears were made by Liberty and the transmission was assembled by RPM Transmissions.
We will be doing a bit more "testing" tonight on the transmission and shift torque cut module. We have a few of the modules out being tested by customers. We would like to get some more feedback from that testing before releasing the product. We have already made one change to the software and that is to allow external devices to control the torque cut via an analog input signal.
Link to in-car video on YouTube.
Here is a link to a much longer video from our track event. 1st two passes show the in car and then an external shot from the vehicle. I don't recall if any other video from that car are in the video.
LPE track day summary video.
I will post some of the VBox acceleration data as well (when I get time to make the graphs etc.).
Compared to the previous videos/testing, we changed to a more sensitive load cell shifter (less load for the same voltage output). We also changed to a new transmission. It is a faceplated TR6060 with straight cut gears. The gears were made by Liberty and the transmission was assembled by RPM Transmissions.
We will be doing a bit more "testing" tonight on the transmission and shift torque cut module. We have a few of the modules out being tested by customers. We would like to get some more feedback from that testing before releasing the product. We have already made one change to the software and that is to allow external devices to control the torque cut via an analog input signal.
07-30-2011, 02:56 PM
#54
LS1Tech Sponsor
Thread Starter
Faceplated and straight cut gear TR6060 transmission pictures Here are some pictures of the face-plated straight-cut gear Tremec TR6060 Camaro transmission built for us by RPM Transmissions (pictures from Jeremy at RPM Transmissions):
07-30-2011, 03:37 PM
#56
LS1Tech Sponsor
Thread Starter
Load cell shifter sources We will be selling a load cell shift **** for use with our shift torque cut module. The LPE load cell shift ***** will be $799 and are custom ordered/custom built so they take 2 to 3 weeks. Right now they are billet aluminum but we are looking at housing the load cell in our custom Momo T56 leather shift ***** as well.
Other sources for load cell shift ***** include:
HITEC Sensor Solutions, Inc.
This company will put a load cell into your existing shift lever.
Hollinger makes a shift ****. It sells for around $1092. It is available in the US from:
AUTOTECHdriveline
Futek has a range of load cell shift *****. They sell for around $2100 each (mostly used by OEM companies for testing and racing applications).
Futek
I found a few other companies using Google but I am not familiar with these companies:
Raja Loadcell
Looks very similar to the Futek pictures and specifications.
Sensor Development
Sunrise Instruments
Any company that works with load cells should be able to produce a shifter load cell. Some people have also used spring loaded switch type shift ***** or levers for activating the torque cut on a gear change.
Other sources for load cell shift ***** include:
HITEC Sensor Solutions, Inc.
This company will put a load cell into your existing shift lever.
Hollinger makes a shift ****. It sells for around $1092. It is available in the US from:
AUTOTECHdriveline
Futek has a range of load cell shift *****. They sell for around $2100 each (mostly used by OEM companies for testing and racing applications).
Futek
I found a few other companies using Google but I am not familiar with these companies:
Raja Loadcell
Looks very similar to the Futek pictures and specifications.
Sensor Development
Sunrise Instruments
Any company that works with load cells should be able to produce a shifter load cell. Some people have also used spring loaded switch type shift ***** or levers for activating the torque cut on a gear change.
08-01-2011, 12:51 PM
#58
Banned
Join Date: Jan 2009
Posts: 16
Likes: 0
Received 0 Likes
on
0 Posts
Nice work, Jason Haines Jason,
Thanks for putting this product together, and providing good reference resources for the community. We carry the Pfitzner low helical angle 4 & 6 Gear clutchless gearset for T56 and will let customers know about this product's availability.
Thanks for putting this product together, and providing good reference resources for the community. We carry the Pfitzner low helical angle 4 & 6 Gear clutchless gearset for T56 and will let customers know about this product's availability.
08-05-2011, 10:23 AM
#59
TECH Senior Member
iTrader: (7)
Andrew
08-05-2011, 11:19 AM
#60
Teching In
iTrader: (2)
Join Date: Dec 2010
Location: West St. Paul, Manitoba
Posts: 15
Likes: 0
Received 0 Likes
on
0 Posts
Absolutely correct. My impression was this setup was more for drags and not road racing, hence I thought my question was valid. With decent rear end gearing, you could likely cruise in 5th/6th most of the time, so coasting would not be a major problem for street driving too. Besides, if you're so hardcore to drive a faceplated trans on the street, I doubt if the additional step of being clutchless would cause you much concern.