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Hi Lotus Friends,

I thinking of investing my money in something useful this winter ;-) and I am torn between the KomoTec EX 430 or the EX460 kit.  

What do you guys think? is the EX460 worth 5k more? or should I just go for the EX430?

KT said, that the DPM Race mode will still work fine on track with both kits ... I actually like it very much and wouldn't want to miss it anymore. Anybody has any real life track experience with one of the above and using Race mode?

Thanks for your help and cheers

Norbert

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Maybe make a trip over to komotec headquarters and see if you can test drive theirs.  There seems to be a fair few 430's kicking about and not read any horror stories. Komo tec do an uprated clut

I had a good look at the 1900cc charger at the festival and despite the obvious increase in size it didn't feel excessively heavy at all to pick up. I estimate it to be no more than 12kg so I wouldn't

I finally had a test drive in the KT EX460 yesterday. I am always very cautious when it comes to believing power figures some tuners publish, as it is relatively easy to get a nice power chart on a Dy

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It's really easy. Independent from the HP you might need the chargecooler, because this will cool down the air inlet and this gives you stabil power on track.

Watch out for the big fans at Komtec while they're testing the eqipment.

 

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The charge cooler really appeals to me, and over 460bhp would just be mental! 

I think i would need to drive one, just to make sure the power was still as usable as it is now. Although im sure it would be great! Certainly smiling a lot!

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A big warning. Clutch.

The clutches aren't designed to take that much power, nor most of the other parts. It'll strain the car beyond it's intended limits. Speak to any dealer (within warranty or not) and they'll do all they can to steer you away from it. 

That said, I certainly cant say i've not be tempted :) Very.. 

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400 is quite different to 460. Lotus also deliberately restrict the torque to protect the gearbox - the difference between the 400 and previous S is only 5lbft (302 vs 297).

That said, Lotus has to be sure that the major components will clock up mega miles. If your car is a low mileage track day toy and you don't care that the gearbox may only last 50k rather than 150k, go for it. It will be epic.

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12 hours ago, Chrisc said:

to make sure the power was still as usable as it is now.

It is still totally driveable, it's just pretty instant when you roll on even the lightest throttle.

In Tour mode, the car is perfectly docile. In Sport, the throttle response takes a little bit of mental adjustment!

Chargecooler is working very well at keeping inlet temperatures down even under constant load.

I wish we could afford to have one of our own here to demo to people, it would be the ultimate sales tool :)

Dave

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3 minutes ago, Hangar 111 said:

It is still totally driveable, it's just pretty instant when you roll on even the lightest throttle.

In Tour mode, the car is perfectly docile. In Sport, the throttle response takes a little bit of mental adjustment!

Chargecooler is working very well at keeping inlet temperatures down even under constant load.

I wish we could afford to have one of our own here to demo to people, it would be the ultimate sales tool :)

Dave

What about the clutch? Would you advise on an uprated unit? 

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9 minutes ago, Chrisc said:

What about the clutch? Would you advise on an uprated unit? 

We would recommend the uprated clutch (and bonus lighter flywheel) kit, but the labour cost to do it is quite high as it is engine out on all the V6 cars.  So generally we would say use it until the clutch gives up, unless you fancy the upgrade straight away.

We've done 5 460 kits here this year, one we fitted uprated clutch, one already had uprated clutch.  Have not had anything negative from the others, but they have been road rather than track cars.

Dave

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Im equally still as tempted - especially regarding the clutch cost. Dave - do you have any indicative prices you could ping me in regards to a 460 along with the clutch and flywheel? Its definitely on my list if you have confidence in the clutch's lifespan. 

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Good Morning,

thanks for all the feedback! I am still torn between the two ... 5k is quite a difference but I guess it is really much more durable and will deliver the power also under constant load and at higher temperatures...  

I guess I will have to make a trip to KT to decide. I hope I can drive both there.... I will also try to get some NS Laptimes - just to get a feeling ... 

Did anybody go for the Oehlins TTX yet? It is quite expensive but its tempting to be able to have a 3 way in the Exige...  

The clutch is a big concern for me as well... I wouldnt want to replace my clutch every year...  

Cheers 

Norbert

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Norbert - take a trip to see the guys at KT, I am sure they will do a good job to convince you ;)

No need to replace the clutch every year.  When your standard clutch gives up, fit the uprated clutch, then you'll be fine.

Tom - I will PM you, feel free to remind me as it is very busy here at the moment!

Dave

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Hi Dave,

thanks! I will take the trip most likely next week already - if it wouldn't be almost 3.5h for me one way I would have already done it ;-) ... I am curious to see / feel how convincing the EX 460 really is ... will keep you all posted.

Cheers

Norbert

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You should also seriously consider the Simply Sports Cars TVS1900.  Make sure you read the "SSC's Opinion" Tab.  Between 415 - 440 hp Depending on what you consider are realistic Powertrain Losses.  I am not knocking the Komo-Tec upgrade but the SSC kit is considerably cheaper  (around Euro 5,500)    I am running it in my car and they have sold quite a lot of them.

http://www.simplysportscars.com/shop/home/10528-sscv6exigetvs1900superchargerupgrade

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@ Mark

Somewhere I read from a SSC chargecooler. Have you developed this already? For my mind I would feel better to have this installed :blush:

Have you done comparision between both systems chargecooler vs TVS1900 ?

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Firstly, I am not SSC - I am a customer.  You read that information probably on S E L O C.

The TVS1900 is physically larger and taller than the Factory TVS1320 and will not fit under the Glass Boot/Engine Lid "IF" you put a Chargecooler underneath it.  To have the ChargeCooler with the TVS1900, you need to replace the Engine Lid to the Cup R Lid.

As far as I am aware, due to the larger Air volume of the TVS1900, I understand that the unit does not suffer from "Heat Soak".  Remember I am in Australia and it gets very hot here.  I have found it to be fine without a Chargecooler.  The larger capacity TVS1900 also develops a lot more Torque.

There is only one car here in Australia using a Chargecooler with the OEM TVS1320 and I understand that the TVS1900 develops more Torque.  (The TVS1900 has 1.5 times the Air Volume capacity per revolution compared to the TVS1320)

Also understand that the TVS1320 is already operating right on the very edge of it's Efficiency.  Remebering that the SSC TVS1900 Kit is about half of the price of the Komo-Tec 460, it is very very good value for money.

The Lotus OEM TVS1320 is supplied to Lotus in the UK by an Australian Supercharger Manufacturer named "Harrop Engineering".  The TVS1900 is their larger capacity unit and has the same Mounting Bolt pattern as the factory unit, so bolts straight on.

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Okay, thank for clarifying that you are not SSC. My idea was, to have the chargecooler with the standard charger, because this could maybe fit under the original lid.

Your arguments are quiet clear, if this the 1900 runs in Australia, it should work of course better in Mid Europe.

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Correct.  See the additional information I added to my post above.  As I understand it, SSC have sold many of these kits into Europe.  They are very popular in Australia.  I fitted my kit myself.  It made a significant improvement to the car's performance.  The Power and Torque is very addictive !

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Hi Mark,

very interesting - thanks for posting this. This also helped to convince me that for me the only route to go between the EX430 and the EX460 is the 460 with the charge cooler...  or maybe the SSC Kit but also with a charge cooler...

Btw: reading SSCs opinion section reminded me of the "Dyno" temperature / parameter "issue"...  does anybody know if the 460 are really apples to apples comparable to the 350?  

Re heat soak on track: I must say that I never really have had an issue of significant heat soack / power loss with the standard Exige V6 ... but so far max outside temperature was 26C and my sessions are usually not longer than 30-45 min. I regularly analyze my lap data and think I would have noticed it latest when looking at the data (straight line high speed etc.) ... 

Has anybody else really noted significant heat soak with the standard V6? Would be interesting to know... 

Cheers

Norbert

 

 

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Norbert, for the reasons you have stated above, I really do think you are wasting a significant amount of money to compensate for Heatsoak that you don't think you are going to get.  Why not consider buying the TVS1900 without the Intercooler, see how it goes and if you still think you need more power (which I doubt), then add the Intercooler later on.

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Mark, this is maybe a tribute to the mentality. I agree in Norbert, because we all know, compressed air will heat up, so we all have the chargecooler as a must in mind. A friend of mine, who is a specialist in ECU programming told me, that the Exige engine MUST be really stabile while running with that high air intake temperatures. Porsche f.e. is reducing the power very much earlier to prevent engine from sudden death.

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I was wondering if there are people running the SSC tvs1900 with headers like 2bular or komotec. As the SSC tvs1900 is still using the standard (restrictive?) manifolds. I guess that there could be extra power gained if you run the tvs1900 with headers...?

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FYI, Hofmanns are now the SSC distributor in this part of the world.

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