Emira 2.0 DCT gear ratio

[HankRS225]

Anyone knows where I can find the gear ratios of the 8-speed DCT of Emira i4?

I'm about to do a "probably" first-ever i4 dyno test.

 

[kitkat]

Gear ratios 1 to 8 and reverse gears are: 15.94 / 11.18 / 7.34 / 5.15 / 3.75 / 2.93 / 2.29 / 1.81 - R1 13.40.

Can't find a second source to confirm.

 

[HankRS225]

Can't find a second source to confirm.

Do you have the final gear ratio, too? Thanks!

 

[Emira Fan]

Anyone knows where I can find the gear ratios of the 8-speed DCT of Emira i4?

I'm about to do a "probably" first-ever i4 dyno test.

[first-ever i4 dyno test.]. You probably are!

We should take bets on power output. With Car&Driver clocking a 3.4s to 60mph run I'm thinking 415 HP
Some of the Dyno facilities also have scales, would be nice to know the actual weight as well.

[0-60 calculator ] this is my swag - Curb weight with feather weight driver

Subtract 0.2 sec for rollout => 3.4s to 60 mph

enjoy

 

[centerpunch]

Certainly has the Mercedes stock gearing, right?

 

[Andy H]

Thread: subscribed

 

[kitkat]

Do you have the final gear ratio, too? Thanks!

Took another look and couldn't find anything, sounds like you'll have to figure it out based on dyno rpm.

 

[Emira Fan]

[[According to available information, the Lotus Emira I4 has a final drive ratio of 3.79. ]]

Who knows if this is right...

 

[HankRS225]

[[According to available information, the Lotus Emira I4 has a final drive ratio of 3.79. ]]

Who knows if this is right...

If the above numbers are correct, then 5th gear might be the one closest to 1:1 for dyno test?

 

[JohnS]

Anyone knows where I can find the gear ratios of the 8-speed DCT of Emira i4?

I'm about to do a "probably" first-ever i4 dyno test.

A good source of info can be obtained from

https://www.automobile-catalog.com/make/lotus/emira/emira_coupe/2024.html#gsc.tab=0

Typical of the info are, engine hp and torque curves, vehicle weight, acceleration figures, gearbox ratios, mph/rpm, kph/rpm curves,

Here is the link detailing the g/box ratios,

https://www.automobile-catalog.com/performance/2024/3277730/lotus_emira_i4_first_edition.html#gsc.tab=0

Engine power curves can be obtained from,

https://www.automobile-catalog.com/curve/2024/3277730/lotus_emira_i4_first_edition.html#gsc.tab=0

I hope this helps.

Looking forward to seeing if your dyno curves match.

John

 

[HankRS225]

A good source of info can be obtained from

https://www.automobile-catalog.com/make/lotus/emira/emira_coupe/2024.html#gsc.tab=0

Typical of the info are, engine hp and torque curves, vehicle weight, acceleration figures, gearbox ratios, mph/rpm, kph/rpm curves,

Here is the link detailing the g/box ratios,

https://www.automobile-catalog.com/performance/2024/3277730/lotus_emira_i4_first_edition.html#gsc.tab=0

View attachment 57090



John

thanks for the info, looks like 5th gear is the one to run dyno.

 

[HankRS225]

[first-ever i4 dyno test.]. You probably are!

We should take bets on power output. With Car&Driver clocking a 3.4s to 60mph run I'm thinking 415 HP
Some of the Dyno facilities also have scales, would be nice to know the actual weight as well.

[0-60 calculator ] this is my swag - Curb weight with feather weight driver
View attachment 57058
Subtract 0.2 sec for rollout => 3.4s to 60 mph

enjoy

I think you meant 4.3s rather than 3.4s...?

 

[Emira Fan]

I think you meant 4.3s rather than 3.4s...?

See this post, thanks

Jan 2025 Car & Driver * Emira AMG * one-pager

Just received my Jan C&D digital issue. Below is the full page article for your collection ;) (same as what Toon posted from his phone Screen shots)

www.emiraforum.com

 

[HankRS225]

Interestingly, I just ran my 360hp stock Emira 2.0T a 0-100 test and got the exact 4.3s as claimed.

Will see how it goes after "upgrading", will upload the pre & after dyno and 0-100 test results soon!

 

[HankRS225]

See this post, thanks

Jan 2025 Car & Driver * Emira AMG * one-pager

Just received my Jan C&D digital issue. Below is the full page article for your collection ;) (same as what Toon posted from his phone Screen shots)

www.emiraforum.com

damn, 400hp + DCT got 3.4s to 60mph? that's insane.

 

[Emira Fan]

yes, quick. Suspect the 400HP variants have a bit more than 400 HP maybe 415 Hp. The US spec also has the latest DCT software.
C&D testers probably tested on a sticky surface in cool temperatures and subtracted roll-out time. From testing perspective you can really on compare cars using the same methodology ie C&D to C&D not R&T to C&D.

 

[HankRS225]

First Ever 360hp stock Lotus Emira 2.0T Dyno Test is done

 

[Emira Fan]

Excellent, very nice curves ! It does appear the engine is underrated. Parasitic drivetrain loss is always difficult to project. With a DTC, no drive shaft u joints, the loss ratio might be 10-15%. maybe on the lower side. Still putting the output well over 360 HP -- perhaps ~375HP.
Torque curve is amazing. Thanks for posting !