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Anyone have knowledge regarding specs the dual clutch for the I4 engine ? How many speeds ?

kratedisease

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Does anyone now what dual clutch transmission is being use for the I4 engine ?

How and speeds/gears ?

Any info on who is the supplier/manufacturer ?
 
The i4 full specification hasn't been officially announced yet, but it's definitely the M139 engine as in the Merc/AMG A45 and A45S (albeit in a different state of tune by Lotus) so the expectation is that it will be the AMG Speedshift DCT 8G (8 speed) but without the 4WD gubbins, of course....

https://www.mercedes-amg.com/en/vehicles/a-class/hatchback.html

 
Yup.. 8 speed dual clutch, likely from AMG too.

Meanwhile, the Toyota EA60 manual 6 speed is taken from an Avensis/Rav 4 with slightly adjusted final drive ratio in the Evora S and GT. I assume this will be the same for the manual V6 Emiras.

EA60​

  • Lotus EVORA Sport Ratio
1st2nd3rd4th5th6thReverseFinal
1-4
Final
5-6
3.5401.9101.4101.0900.9700.86003.7803.240
  • Lotus EVORA Standard Ratio
1st2nd3rd4th5th6thReverseFinal
1-4
Final
5-6
3.5401.9101.2200.8600.7900.64003.7803.240
 
Here's a photo of the M139 with the 8G-DCT attached:

P6065958.jpg


The 8G-DCT is the piece that sits below the air duct. You can just see the circular output shaft on the far right that looks like a oil filter cap wrench. This photo also shows how neat and tidy the water-air intercooler is. Another bit is the BMW kidney-shaped intake opening - the duct goes over the engine and feeds that turbo in the back.
 
Yup.. 8 speed dual clutch, likely from AMG too.

Meanwhile, the Toyota EA60 manual 6 speed is taken from an Avensis/Rav 4 with slightly adjusted final drive ratio in the Evora S and GT. I assume this will be the same for the manual V6 Emiras.

EA60​

  • Lotus EVORA Sport Ratio
1st2nd3rd4th5th6thReverseFinal
1-4
Final
5-6
3.5401.9101.4101.0900.9700.86003.7803.240
  • Lotus EVORA Standard Ratio
1st2nd3rd4th5th6thReverseFinal
1-4
Final
5-6
3.5401.9101.2200.8600.7900.64003.7803.240
When you put it this way, you're making me a bit jealous of the i4 gang.
 
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Anyone guessing which car will be lighter ? v6 or I4 in its most stripped form ?

I assume the v6 weighs more, but assume the manual weighs less than the dual clutch ?

anyone with knowledge ?
 
Anyone guessing which car will be lighter ? v6 or I4 in its most stripped form ?

I assume the v6 weighs more, but assume the manual weighs less than the dual clutch ?

anyone with knowledge ?
We don't have definitive figures yet for the i4 but I would be very surprised if it wasn't lighter...
 
It really is a great engine by amg hand made piece of engineering. That's why lotus have picked it. I know its well capable of 500 bhp and 550 nm with the 8 speed dct it will be epic.
 
The m139 is 160 kg the 2gr is 175kg but the gearbox will probably be lighter in the v6. There are other parts that need to be taken into account and they have managed to save lots of weight from dct boxes lately which were very heavy initially.
 
I understood the plate underneath the i4 will be of aluminium as for the v6 it is steel. I would estimate the i4 to be lighter than the v6. Looking forward to the specs of the i4: "Just add lightness"
 
I just want to know if the AMG engine will ever be offered with a manual trans. I doubt it, but there will be quite a few upset V6 buyers if it happens.
 
I just want to know if the AMG engine will ever be offered with a manual trans. I doubt it, but there will be quite a few upset V6 buyers if it happens.
Very unlikely, don't think that AMG engine has ever been offered with manual transmission in any make of car.
 
I just want to know if the AMG engine will ever be offered with a manual trans. I doubt it, but there will be quite a few upset V6 buyers if it happens.
Just my opinion. I think the i4 will be capable to unleash al lot more power than 360 hp. Up to 500 hp will be possible. the amg engine was designed to work with a dual clutch. If you want power - in the long run - go for the i4. If you want power now go for the v6. Just my opinion,..
 
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I doubt someone is going to make a dedicated housing for a manual transmission just for the M139. Mercedes certainly has zero interest in doing it, and the only potential customers would be someone like Lotus. IMO, that's too small of a target market.
 
There were some attempts at a weight calculation on another forum which suggested 20-30kg lighter for the i4, taking account of engine, supercharger/turbo, gearbox, transmission and rear sub-assembly differences.

The V6 First Edition published weight is 53kg heavier than the minimum Emira weight Lotus have stated as their target (so we assume is Base Edition i4). 20-30kg for all the First Edition options seems plausible, maybe a bit high.
 
There were some attempts at a weight calculation on another forum which suggested 20-30kg lighter for the i4, taking account of engine, supercharger/turbo, gearbox, transmission and rear sub-assembly differences.

The V6 First Edition published weight is 53kg heavier than the minimum Emira weight Lotus have stated as their target (so we assume is Base Edition i4). 20-30kg for all the First Edition options seems plausible, maybe a bit high.
Guess I'll have to loose the 30 kg on my own body to keep the Emira in shape! = less 🍷
 

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