650hp 13b gearbox options?
- Thread starter RyanFurness
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I broke it quickly...And repeatedly...Chaste White Rebuild- Latest: RandomVillager
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crazy, people used to bust them for fun at £50 a pop lol
Copyninja
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Id like to make a correction on my original post here.
DO NOT get the E92 M3 DCT gearbox for an FD RX7. The gear ratios will not suit the final drive ratio of the FD RX7 be it 3.9, 4.1, 4.3, 4.44 or 4.77.
I confirm the F80/82 M3/M4 DCT gearbox ratios will suit an FD RX7. This gearbox is rated for 700nm or 516 ft pounds of torque.
with a 4.1 final drive and 255 40 17 wheel and tyre set up the gearing is as below. Max RPM is 7500.
Tyre Circumference = 1997.42 mm
1st Gear = 45.62 km/h - 28.28 mph
2nd Gear = 84.55 km/h - 52.42 mph
3rd Gear = 128.88 km/h - 79.91 mph
4th Gear = 171.68 km/h - 106.44 mph
5th Gear = 219.23 km/h - 135.92 mph
6th Gear = 259.75 km/h - 161.05 mph
7th Gear = 326.72 km/h - 202.57 mph
with a 4.3 final drive and 255 40 17 wheel and tyre set up the gearing is as below. Max RPM is 7500.
Tyre Circumference = 1997.42 mm
1st Gear = 43.49 km/h - 26.97 mph
2nd Gear = 80.61 km/h - 49.98 mph
3rd Gear = 122.89 km/h - 76.19 mph
4th Gear = 163.69 km/h - 101.49 mph
5th Gear = 209.03 km/h - 129.6 mph
6th Gear = 247.67 km/h - 153.55 mph
7th Gear = 311.52 km/h - 193.14 mph
with a 4.44 and 255 40 17 wheel and tyre set up the gearing is as below. Max RPM is 7500.
Tyre Circumference = 1997.42 mm
1st Gear = 42.12 km/h - 26.12 mph
2nd Gear = 78.07 km/h - 48.4 mph
3rd Gear = 119.01 km/h - 73.79 mph
4th Gear = 158.53 km/h - 98.29 mph
5th Gear = 202.44 km/h - 125.51 mph
6th Gear = 239.86 km/h - 148.71 mph
7th Gear = 301.7 km/h - 187.05 mph
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What rpm have you used to calculate speed. Top speed of 28mph in 1st makes it a pretty pointless gear.
Actually thinking about it might be good if you've got a high idle on a bridge or something easier the drive on the road, in traffic, as it be going slower. Rather than letting the clutch off and doing 20mph instantly
Actually thinking about it might be good if you've got a high idle on a bridge or something easier the drive on the road, in traffic, as it be going slower. Rather than letting the clutch off and doing 20mph instantly
Copyninja
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Good point I have updated the post. Max rpm I have used is 7500. For doodling about in town you can just leave it in drive and it will do the work for you and auto shift.
Adam
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I’ve got the e92 box. About to embark on this shit show. By my calculations it should be fine to use with a 4.1 final drive. 265/18 tyre and revving to 9500 because anyone doing this won’t be stopping at 7500rpm.
Tyre Circumference = 2019.1 mm
1st Gear = 58.72 km/h - 36.41 mph
2nd Gear = 96.79 km/h - 60.01 mph
3rd Gear = 133.67 km/h - 82.87 mph
4th Gear = 175.44 km/h - 108.77 mph
5th Gear = 215.93 km/h - 133.87 mph
6th Gear = 233.92 km/h - 145.03 mph
7th Gear = 280.7 km/h - 174.04 mph
Tyre Circumference = 2019.1 mm
1st Gear = 58.72 km/h - 36.41 mph
2nd Gear = 96.79 km/h - 60.01 mph
3rd Gear = 133.67 km/h - 82.87 mph
4th Gear = 175.44 km/h - 108.77 mph
5th Gear = 215.93 km/h - 133.87 mph
6th Gear = 233.92 km/h - 145.03 mph
7th Gear = 280.7 km/h - 174.04 mph
Copyninja
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The only thing to take note of is the max rated torque by BMW is 383.532 ft lbs or 520nm. I know it can handle 410ft lbs as the e92 m3 supercharged cars run these but not for prolonged periods of time....but if you are revving to 9500 rpm be sure the check the torque output of your engine is safe for this gearbox.
Adam
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Some good reading here.
www.seemslegitgarage.com
www.seemslegitgarage.com
www.seemslegitgarage.com
So you want a DCT... Chapter 1
The world is a crazy enough place, and now you want to swap a 7-speed transmission that shifts in 50 milleseconds or into the car in your garage you call a "project car" as an excuse for it never being done? Well...we agree, that sounds like a great idea! So what is a DCT and why is it so...
www.seemslegitgarage.com
DCT Bible, Chapter 2- Transmission Hardware
So now that we went over how capable the DCT is, let's go over how you're going to get it in your car!Transmission VersionsThe BMW 7-Speed DCT, aka the GS7D36SG, comes in four versions. They are essentially the same except for gear ratio and bell-housing combinations. They all feature the same...
www.seemslegitgarage.com
DCT Bible, Chapter 3: Control
So now that we know more about the BMW/Getrag Dual Clutch Transmission from chapters one and two, we can further learn how to control all the spinning gears and clutch packs. Currently, the best way to do that is with the HTG GCU (Gearbox Control Unit). The GCU is a transmission controller that...
www.seemslegitgarage.com
Copyninja
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Some good reading here.
So you want a DCT... Chapter 1
The world is a crazy enough place, and now you want to swap a 7-speed transmission that shifts in 50 milleseconds or into the car in your garage you call a "project car" as an excuse for it never being done? Well...we agree, that sounds like a great idea! So what is a DCT and why is it so...
DCT Bible, Chapter 2- Transmission Hardware
So now that we went over how capable the DCT is, let's go over how you're going to get it in your car!Transmission VersionsThe BMW 7-Speed DCT, aka the GS7D36SG, comes in four versions. They are essentially the same except for gear ratio and bell-housing combinations. They all feature the same...
DCT Bible, Chapter 3: Control
So now that we know more about the BMW/Getrag Dual Clutch Transmission from chapters one and two, we can further learn how to control all the spinning gears and clutch packs. Currently, the best way to do that is with the HTG GCU (Gearbox Control Unit). The GCU is a transmission controller that...
Good info on there, Me and my engine builder are going for the F80 DCT conversion for a number of reasons...but also for the top speed and the gearboxes theoretical vmax of over 200mph.....which we can test out at a vmax event next year and also the higher torque limit...not that my car will ever make the torque required to break this box.
I dont have an engine build that revs to 9500rpm and i suspect many probably wont....but mine will go to 8000rpm before the turbo becomes a limit. However its more likely my TO4Z runs out of air well before 8krpm.
What setup are you running to make power at 9500rpm?
Adam
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What diff are you going to use?
Copyninja
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Not sure at this point. what about you?
Copyninja
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Thinking of a Drexler diff myself...will see how the dct conversion goes first
Sounds very interesting. Do you know what gearbox controller you are using and does it link via the engine ecu aswell?
David70188
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Last post was about two months ago but maybe it's still active.
How about a 370Z gearbox with an adapter:
collinsadapters.com
The gearbox should handle it and schould be better at high rpm than a t56
How about a 370Z gearbox with an adapter:
Collins Performance Adapters - Engine Swap Kits
Collins Performance Technologies engine and transmission swap kits for drifting and drag racing. High performance, high horsepower vehicle engine swaps. 2JZGTE, 1JZGTE, 2JZ, 1JZ, 350Z, 370Z, LSX, LS, 1UZ, KA24DE, K20, K24, RX-8, Supra, IS300, Engine Swap, Drifting, Drift, Drag Race, Transmission...
collinsadapters.com
The gearbox should handle it and schould be better at high rpm than a t56
