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Lotus Evora GT 430 with KOMO Tec Stage 4-475 Dyno - Engine & Ancilliaries/Gearbox - The Lotus Forums Jump to content
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Lotus Evora GT 430 with KOMO Tec Stage 4-475 Dyno

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Yesterday I had a performance increase at the FA Komo Tec. I uploaded the video to YouTube. Here you see 2 dynamometer rides:scooter:

and the result at the end of the video.

Greetings from Germany.

 

 

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Great results.

Horsepower was 479 - brake horsepower or wheel horsepower? 

What does the torque graph look like in comparison? 

What does Komo-tec recommend owners do to ensure the gearbox can withstand the extra torque? 

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1 hour ago, cib24 said:

Horsepower was 479 - brake horsepower or wheel horsepower? 

What does the torque graph look like in comparison?

It will be F/BHP. The WHP is 423. The torque curve is also on the graph (CEngTq):

03683CA5-1F26-4B5F-9A50-CD8BE7B81165.jpeg

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I see it now. Sorry. Presumably nM.

What is the kPa boost difference between the stock car and the 475 kit pulley or map?

Again, any recommendations from Komo-tec to improve the longevity of the gearbox to take the extra torque?

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torque is the blue line with newtonmeter. the pulli is the original.

 

my opinion: if the gearbox does not tolerate the 60 nm more, even over a long time, lotus has done something wrong in the planning. And even if it would break, which I do not believe, then the price for a used new gearbox is not high , because the gearbox is not a technical highlight like ferrari etc.

 

 

i drive with my evora 400 over 30000 km and 470 ps and 495 nm an the gearbox fehl like new

 

Edited by Evora 400

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Thanks. So, the 475 kit is basically a higher flowing exhaust system, carbon intake box and a remap. 

I asked about the torque because I thought consenus was that Lotus was limiting torque on their  V6 supercharged models due to the power limitations of the gearbox that they use. 

If you managed 30,000 km out of the 400 with elevated power levels and no issues then that's great news. 

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Lotus decided not to push the envelop on the gearbox from a reliability,  but it doesn't mean the gearbox can't take a bit more, the question is how much were they willing to bet on the gearbox being able to last.  The gearbox provider, Aisin, rated the gearbox at a maximum at 450nm at 6600 rpm... Lotus hence fitted a gearbox oil cooler to  keep it from going too high in temps and managed to get 450 at 7000 rpm, obviously it gets the job done...

But Lotus is not Komotec, they want to retain the warranty they get from Aisin. if Aisin only warrants the gearbox till 450, then logically Lotus would not produce a gearbox outside  this frameset... Even if as we know Lotus puts its own gear ratios in the BG6 UNIT, I believe they have an agreement with Aisin so that they still get some form of limited warranty on the case.

Now with support from Geely they have the money and free reins to work with Aisin on removing this limitation and essentially creating and warranting a bespoke version of the BG6 for Lotus The only thing it takes is  some R&D and a whole lot of testing in order to ascertain that the gearbox will last a million mile ; and an order book big enough to justify the upfront investment, knowing that this gearbox will pretty much only be used on Lotus products in the future as Volvo has gone entirely 8 speed auto at the top end, Geely, and Lynk and Co are either using 6 speed auto or 7 speed DCT on their top end models.  

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1 hour ago, NedaSay said:

Lotus decided not to push the envelop on the gearbox from a reliability,  but it doesn't mean the gearbox can't take a bit more, the question is how much were they willing to bet on the gearbox being able to last.  The gearbox provider, Aisin, rated the gearbox at a maximum at 450nm at 6600 rpm... Lotus hence fitted a gearbox oil cooler to  keep it from going too high in temps and managed to get 450 at 7000 rpm, obviously it gets the job done...

But Lotus is not Komotec, they want to retain the warranty they get from Aisin. if Aisin only warrants the gearbox till 450, then logically Lotus would not produce a gearbox outside  this frameset... Even if as we know Lotus puts its own gear ratios in the BG6 UNIT, I believe they have an agreement with Aisin so that they still get some form of limited warranty on the case.

Now with support from Geely they have the money and free reins to work with Aisin on removing this limitation and essentially creating and warranting a bespoke version of the BG6 for Lotus The only thing it takes is  some R&D and a whole lot of testing in order to ascertain that the gearbox will last a million mile ; and an order book big enough to justify the upfront investment, knowing that this gearbox will pretty much only be used on Lotus products in the future as Volvo has gone entirely 8 speed auto at the top end, Geely, and Lynk and Co are either using 6 speed auto or 7 speed DCT on their top end models.  

Better to just buy in the vw dsg unit

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^^Which i far as i know is a proprietary design and can't cope with over 480nm according to Getrag its supplier. Geely group has developed its own DCT so maybe Lotus will be able to build it up for its own purpose... the other option being to purchase a unit from Borg Wagner or ZF...

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I don’t think there are many DSG boxes available for 400+ bhp and a transversals installation. Lotus were developing their own back in the Bahar days. The development costs wouldn’t make it economically viable unless they could sell it to someone else as well.

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Lotus Engineering did develop a DCT but it was not a project for Lotus Cars: 

https://www.autocar.co.uk/car-news/new-cars/update-lotuss-dual-clutch-box

As far as I remember, the GTE was supposed to get an AMT gearbox but it did not materialize after the DB debacle.

The new sport car that will be unveiled in 2020 will probably have a more modern auto unit, I'm betting on the 8 speed from Aisin AW  (AW8G45) as it is already used throughout the Group performance offering, but it could also get a 6 speed sequential as it seems Lynk and Co and Cyan Racing ( formerly known as Polestar) have been working on getting this thing to cope with the numbers produced by their homologation special the Lynk & Co 03 Cyan. The difficulty as Martin said is to get a transverse gearbox to cope with over 400bhp and Torque, so I guess Cyan an Lynk and Co opted for a 6 speed that could have chunkier ratios.

As for the manual, which Lotus will most certainly keep until the world completes the switch to EV only propulsion system, I guess they'll keep improving the Aisin BG6. 

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