Komo-Tec Powerphases - LotusTalk - The Lotus Cars Community
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post #1 of 27 (permalink) Old 10-01-2010, 08:03 AM Thread Starter
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Komo-Tec Powerphases

What are the views on their "powerphases" for the Exige S? Does it seem like they are able to get better torque gains then what we have been seeing with other tunes? Is anyone in the states using these kits?

2008 Exige S240
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post #2 of 27 (permalink) Old 10-02-2010, 04:21 AM
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Komo-Tec phase 3 power upgrade

I am currently running a Komo-tec phase 3 power conversion on a 2006 Exige Cup240. All pulleys, gearings, rods, pistions, etc. remained stock. Dyno runs on a MATA rolling road on a hot summer day (90 degrees and high humidity) using a custom built piper catback exhaust provided 292 hp at the crank (ca. 230 WHP) and 245 Nm of torque. This is good for 0-62 runs of about 4.3 secs.

With cooler Fall weather coming and less humidity, 305 hp should be possible. Due to the supercharger architecture, however, I don't expect any more torque to come out of this setup. The torque with the phase 3 is much more even than the phase 2 and really pulls nicely out of hairpin turns

Biggest obstacle to really tearing up the asphalt is - as always - the too-long gearing and the transmission itself, which has a power limit of about 300 hp. If you are serious about tracking the car, I would consider putting in the fantastic unit originally designed for the Toyot MR-2 turbo which is good for at least 550 - 600 BHP

Additionally, Jubu Racing in Austria makes straight-toothed forged gears which are MUCH more durable than the stock unit.

I also installed an autonomous oil cooler for the transmission with heat exchanger. This might just save your mechanicals....

All in all, the Komo-tec power packages are pretty reliable and deliver good value IMHO. Since that much power is just rediculous on public roads, you should first consider the kind of driving you'll primarily be using the car for.

Good luck with all the options!

Greets,
Andrew
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post #3 of 27 (permalink) Old 10-02-2010, 04:23 AM
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not in the States..

ups, I'm in Switzerland, so maybe none of what I said matters here...
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post #4 of 27 (permalink) Old 10-02-2010, 11:43 AM Thread Starter
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Andrew,
Thank you for the response. How well do you feel the charge cooler works? So the kit is able to get those numbers with out changing to a smaller pulley?

Thanks again,

Chris

2008 Exige S240
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post #5 of 27 (permalink) Old 10-02-2010, 12:01 PM
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chargecooler

The chargecooler has worked flawlessly up to now, also on scorching hot trackdays . Reducing the working temperature by a substantial amount (between 20 - 35 degrees celcius) makes a HUGE difference in available power, which translates directly into hp and lap times...

According to Komo-tec, the phase 3 upgrade should bring up to 80 hp, which would put my car at 323 BHP... for various reasons (those previously stated as well as possible power losses in the transmission ???), I am only getting 40 - 55 added hp (total 292). The car actually had almost the same hp with the phase 2, but the torque was less as well as being less even throughout the power band.

Sometimes different Dynos give very different power readings, but I lack the experience to say anything more definite.

Changing to a different pulley might change the torque and give a bit more power, but you should consider that the car will become increasingly "nervous" as you upgrade the power. Additionally, different ECU remaps will sometimes also yield radically different results.

greets,
Andrew
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post #6 of 27 (permalink) Old 10-03-2010, 11:12 PM
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i am running KOMO kit on my 1zz - so far so good. more than happy with 230-240 hp(+ ~100 from 1zz's stock of 135).

kit is very neat and has everything in it. recommended 100%

> 2008 Gallardo Superleggera
> 2007 Elise: Komo-Tec Supercharged, All Carbon - Daily Driver
> 2005 Subaru Legacy GT 2.0T - Daily Driver
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post #7 of 27 (permalink) Old 10-05-2010, 12:32 PM
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simon_komo also has the 300 kit, IIRC.

** save ~10 lbs gain 1 hp ** EQ: Y=(190*X) / (1984-X) where Y is (HP) and X is (lbs)

'07 Lotus Exige S310


WTC 2
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post #8 of 27 (permalink) Old 10-06-2010, 03:27 AM
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I'm running a K-T kit on my 1zz. One of the reasons they produce higher torque is partly the rotrex charger used, and also use of an air restrictor, which forces more boosdt (but controlled) at lower speeds.

Loyalluck - pm me. be interested to compare experiences.
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post #9 of 27 (permalink) Old 10-06-2010, 09:26 AM Thread Starter
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So far I haven't found anyone in the U.S. that is using their kits.

2008 Exige S240
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post #10 of 27 (permalink) Old 10-06-2010, 10:27 AM
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Quote:
Originally Posted by Rossco View Post
I'm running a K-T kit on my 1zz. One of the reasons they produce higher torque is partly the rotrex charger used, and also use of an air restrictor, which forces more boosdt (but controlled) at lower speeds.

Loyalluck - pm me. be interested to compare experiences.
PMd.

sorry for offtop.

> 2008 Gallardo Superleggera
> 2007 Elise: Komo-Tec Supercharged, All Carbon - Daily Driver
> 2005 Subaru Legacy GT 2.0T - Daily Driver
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post #11 of 27 (permalink) Old 10-06-2010, 12:28 PM
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Quote:
Originally Posted by caboydman View Post
So far I haven't found anyone in the U.S. that is using their kits.
Since I have been working with Komo-Tec for years now I know they have sold some of these kits to North America but I remember most of them have been sold to Canada. But there should be some out in the US.
However, if you are interested in a Komo-Tec Kit you could buy the parts and get a FED reflash for the Kit by Kold-fire or wait until there is a BOE/Kold-fire Kit availabe in the US (first cars with a 300hp+ stage beeing tested right now).
BTW the PLUS of 80hp (named by Komo-Tec) is given if you had a stock 220hp car
Attached you can find several stages, red and black is actually the difference between S280 and S300, starting with a stock S240 in green.
I just don't have a printout of the S320 stage on this PC but in the shop, it's based on the Komo-Tec S300 with pulley change and headers, I think there is one guy with a 2eleven in the forum that rides this stage (Kit was installed and modified by Hangar111)

@SLOWANDEASY Has the install been made by Lotus West? Their MAHA is quite exact but our Ventilation on the dyno is better, that's why we are more exact when it comes to HP that is there on the street. We have very similar IATs comparing to a road run.

@Rossco The S300 is a stage based on the 2ZZ factory Exige S, so no Rotrex there.
However there are a few cars out there with a special Rotrex stage that make around 325hp and have a max torque of around 290Nm

Cheers!
Luke
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Last edited by Kold-Fire; 10-06-2010 at 12:43 PM.
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post #12 of 27 (permalink) Old 10-06-2010, 04:44 PM Thread Starter
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Luke,
Thanks for the information. Is your 300+ kit going to be based on the Komo-Tec kit?

2008 Exige S240
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post #13 of 27 (permalink) Old 10-09-2010, 01:03 AM
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Quote:
Originally Posted by caboydman View Post
Luke,
Thanks for the information. Is your 300+ kit going to be based on the Komo-Tec kit?
Hi!
It's not based on it when it comes to parts but there will be a similar output. Ask BOE (Phil) for more details.

Cheers!
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post #14 of 27 (permalink) Old 10-09-2010, 09:09 PM
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the low-end torque roll-off is crazy.

** save ~10 lbs gain 1 hp ** EQ: Y=(190*X) / (1984-X) where Y is (HP) and X is (lbs)

'07 Lotus Exige S310


WTC 2
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post #15 of 27 (permalink) Old 10-12-2010, 02:26 AM
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Lotus West

@KOLD-FIRE: yes, LW is the garage responsible for the installation. Great work and very reliable. Daniel Koblitschek had to send re-worked software twice before we got halfway good numbers though... The MAHA Dyno is run by the Lambo dealership in St. Gallen, so I doubt they are pretending with numbers
We'll be doing another dyno run in a couple of weeks when the temperature goes down, so I'll post the results then. The goal is 300+ hp. As far as track performance goes, I am interested in the Jubu gearing (straight cut which delivers power more immediately) but they might be too loud...although at the moment the car has 100+ db inside, so I wouldn't probably even notice..
Anybody out there have the MR-2 Turbo transmission on an exige?

greets,
Andrew
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post #16 of 27 (permalink) Old 10-13-2010, 05:16 PM
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Yeah, I know the Lambo dealer in St. Gallen and the dyno, it's quite exact but as mentioned our measurements show more the reality on the street due to similar IATs.
However there is one more important thing to consider, and that is the reason you needed more ECU updates:
Some of the cars have more sensitive knock sensors then other, so they register knocking where there is no knocking AND then start losing power. Now we have that problem solved. BTW I know some stock Cup260 facing the same problem.
And there is another problem with the huge differences in the EATON chargers (losses). We have cars making only 0,43 bar and other cars make 0,52 or even more boost, same MY, same base car, same Modifications, same stock pulley. So it's very important to know the max boost when you think you don't have enough power... and then maybe to think about a slightly smaller pulley. You can measure the boost when you measure the voltage on PIN 4 of the IAT sensor on your intercooler. The ECU doesn't use this information...
Check out the datasheet attached.
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File Type: pdf Bosch 0261230042.pdf (299.5 KB, 976 views)
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post #17 of 27 (permalink) Old 10-13-2010, 05:56 PM Thread Starter
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Are the differences in boost due to quality control of the Eaton chargers or something else?

2008 Exige S240
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post #18 of 27 (permalink) Old 10-14-2010, 05:23 AM
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That's a good question. Indeed I am not sure yet why some chargers are better or others not, if it's just Eaton's tolerances or quality controls, but there are definitely additionally problems with the coating of the screws... The experience shows, that it takes some time until the differences appear, often it even doesn't matter if you race your car or drive carefully. We have race cars with 300+ stages doing the 4th season without any problems and first chargers, and we have also faced street cars with 280-300hp stages that lost boost after some thousand kms...
Since I am also tuning other makes, I know that e.g. Mercedes usually takes "every" Eaton charger they get for their supercharged engines, like Lotus does. And normally that's OK and it doesn't matter if the charger has a little more or a little less boost, as the engines get the power they should within the tolerance range. But the discrepancy rises with every tuning stage... So coming back to Mercedes, for cars like the CLK DTM or SLR only the best chargers were taken, the chargers with the least pressure losses / the best tolerances. Naturally there are differences in the chargers gearing or other mointing parts of such cars but the body and screws of the SLR, CLK DTM, normal SL 55, E55, G55 are the same.
At least all Eaton chargers have one thing in common, at that's the thing that they don't like over revs... So always be careful with smaller pulleys, besides the risk of too much boost I think noone wants his Charger to look like on the attached pictures some day... IMHO every pulley below 3.0" is definitely the charger's death, and on German Autobahns or with heavy race usage additionally definitely the death of a stock engine...
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Last edited by Kold-Fire; 10-14-2010 at 05:46 AM.
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post #19 of 27 (permalink) Old 10-14-2010, 06:24 PM Thread Starter
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That is very interesting. would have been nice if Lotus put in a stock boost gauge.
What is your opinion on improving the intercooling? Komo-Tec has seemed to have choosen the air-water route.

2008 Exige S240
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post #20 of 27 (permalink) Old 10-15-2010, 03:19 AM
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Quote:
Originally Posted by caboydman View Post
That is very interesting. would have been nice if Lotus put in a stock boost gauge.
What is your opinion on improving the intercooling? Komo-Tec has seemed to have choosen the air-water route.
Well, at least every Exige S has a pressure sensor, even if it's not used by the ECU, see my other answer.
Regarding the intercooler it depends if you are racing, under which conditions you are driving etc. So everyone has to decide if he wants an upgraded intercooler like the RLS or an air-water, like the one from Komo-Tec or the new one that BOE has.
Cheers!
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