[Z06] A close look at the LG Motorsports/Emco sequential gear box
#1
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St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
A close look at the LG Motorsports/Emco sequential gear box
Hi guys,
I wanted to take some time for those looking at sequential transmissions and show you what goes inside of a purpose built unit, not just a conversion piece.
This is the same unit we have been running for seasons in GrandAm and very similar to the larger unit featured in our ALMS GT2 Corvette, and the very SAME unit you can buy for your own project.
With over 45 different gear ratios you can custom tailor this box to each track and your car for the ultimate in close ratio gear boxes
These are all built to order and come in almost 20 lbs lighter than the OEM gear box and feature pressurized, filtered oil to all bearings and gears. Straight cut gears with of course replaceable dog rings for engagement.
Assembled main case
Tail shaft removed showing reverse gear
Comparison of the reverse gear to the main gears
Notice how much wider the forward gears are
Shift forks, notice they are gun drilled and feature pressurized oiling passages
Look inside the main case. Notice the large roller bearings and also pressurized spray bar for oiling to the gears
Main gear cluster
Huge main roller bearings for main shaft and counter shaft
Main shafts and shift rail
Gun drilled main shafts, again with pressurized oiling passages
Main shaft support bearings in place
Built in oil pump
Fine micro filter assembly
Oil pick up tube
As you can see it is more than just a face plated, or dog ring gear box T56 that goes into each one of these gear boxes.
While they may not be for everyone, I hope this shows you a bit more info on what goes inside of one of these awesome units! Feel free to hit me with any questions you have!
I wanted to take some time for those looking at sequential transmissions and show you what goes inside of a purpose built unit, not just a conversion piece.
This is the same unit we have been running for seasons in GrandAm and very similar to the larger unit featured in our ALMS GT2 Corvette, and the very SAME unit you can buy for your own project.
With over 45 different gear ratios you can custom tailor this box to each track and your car for the ultimate in close ratio gear boxes
These are all built to order and come in almost 20 lbs lighter than the OEM gear box and feature pressurized, filtered oil to all bearings and gears. Straight cut gears with of course replaceable dog rings for engagement.
Assembled main case
Tail shaft removed showing reverse gear
Comparison of the reverse gear to the main gears
Notice how much wider the forward gears are
Shift forks, notice they are gun drilled and feature pressurized oiling passages
Look inside the main case. Notice the large roller bearings and also pressurized spray bar for oiling to the gears
Main gear cluster
Huge main roller bearings for main shaft and counter shaft
Main shafts and shift rail
Gun drilled main shafts, again with pressurized oiling passages
Main shaft support bearings in place
Built in oil pump
Fine micro filter assembly
Oil pick up tube
As you can see it is more than just a face plated, or dog ring gear box T56 that goes into each one of these gear boxes.
While they may not be for everyone, I hope this shows you a bit more info on what goes inside of one of these awesome units! Feel free to hit me with any questions you have!
#2
Melting Slicks
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Great post, thanks
How does the sequential gear selection mechanism work? Could you put up some pictures of those parts and a description of how it works?
And I hope this isn't too dumb a question, but how do you drive one of these? With or without the clutch? How do you rev match on downshifts? Upshifts?
How does the sequential gear selection mechanism work? Could you put up some pictures of those parts and a description of how it works?
And I hope this isn't too dumb a question, but how do you drive one of these? With or without the clutch? How do you rev match on downshifts? Upshifts?
#4
Transmission ****, gotta love it.
#5
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St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
Great post, thanks
How does the sequential gear selection mechanism work? Could you put up some pictures of those parts and a description of how it works?
And I hope this isn't too dumb a question, but how do you drive one of these? With or without the clutch? How do you rev match on downshifts? Upshifts?
How does the sequential gear selection mechanism work? Could you put up some pictures of those parts and a description of how it works?
And I hope this isn't too dumb a question, but how do you drive one of these? With or without the clutch? How do you rev match on downshifts? Upshifts?
The shifting works pretty much how a motorcycle box works. You can see the main shift rail and shift forks. These are all on rotating cams when you pull back on the lever it rotates the main shift rod that then turns the cams and selects which fork to move forward or backwards to select the next gear.
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St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
If you do nothing to the stock electronics on the car you would need the clutch for stop and start. Once rolling you can drive it like a motorcycle and just lift and blip to change gears.
There are plug in boxes for flat shifting on upshifts. They are working on a paddle shift for up and down shifting without a clutch...again still need the clutch for stop and starting.
There are plug in boxes for flat shifting on upshifts. They are working on a paddle shift for up and down shifting without a clutch...again still need the clutch for stop and starting.
#9
Sounds like with the stock electronics you need to rev match on downshifts, which means good heel and toe technique on the track....and upshifts require a brief lift off throttle. Is this correct?
#13
Le Mans Master
I learned on a Saenz dog ring transmission. If I was still racing we would have a few of these.
NICE WORK!
Jim
NICE WORK!
Jim
#14
Melting Slicks
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Clutch is needed to stop and start the car. If you want to tap it during a shift you can, or you can drive it like you would a motorcycle...just lift to shift. With some electronics added to it you can also flat shift without lifting but it does require a few more parts. Paddle shifts are on the way as well.
What electronics are added to allow flat shifting?
What will the power assist be for the paddle shift setup? Air, electric, hydraulic?
The shifting works pretty much how a motorcycle box works. You can see the main shift rail and shift forks. These are all on rotating cams when you pull back on the lever it rotates the main shift rod that then turns the cams and selects which fork to move forward or backwards to select the next gear
Is there a neutral between all the gears or is it either in one gear or another with a dedicated neutral position between two gears, say 1st and 2nd, like a motorcycle?.
#16
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St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
Tuff dogs! Back in my motorcycle days we used the clutch to shift...
What electronics are added to allow flat shifting?
What will the power assist be for the paddle shift setup? Air, electric, hydraulic?
Got it, now that I know what I'm looking at.
Is there a neutral between all the gears or is it either in one gear or another with a dedicated neutral position between two gears, say 1st and 2nd, like a motorcycle?.
What electronics are added to allow flat shifting?
What will the power assist be for the paddle shift setup? Air, electric, hydraulic?
Got it, now that I know what I'm looking at.
Is there a neutral between all the gears or is it either in one gear or another with a dedicated neutral position between two gears, say 1st and 2nd, like a motorcycle?.
R-N-1-2-3-4-5-6
There is a lock out so if you get to happy punching the stick it will stop at N.
You can use something as simple as an ignition cut tied into the shifter for flat shifts on the upshifts, but a full auto blip paddle shift requires a bit more controls plus the electronics to shift it. That piece is still in development.
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St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
Cool video from a customer's ZR1 that just installed the Emco in their car.
Flat shift was not hooked up for this video, so you can see even without the added electronics just how quickly you can shift this vs a standard 6 spd.
Flat shift was not hooked up for this video, so you can see even without the added electronics just how quickly you can shift this vs a standard 6 spd.