Komo-Tec Powerphases - Page 2 - LotusTalk - The Lotus Cars Community
Reply
 
LinkBack Thread Tools Display Modes
post #21 of 27 (permalink) Old 10-17-2010, 01:08 PM Thread Starter
Registered User
 
caboydman's Avatar
 
Join Date: May 2009
Posts: 79
What do you recommend as far as boost gauges go?

2008 Exige S240
caboydman is offline  
Sponsored Links
Advertisement
 
post #22 of 27 (permalink) Old 10-18-2010, 02:10 AM
Registered User
 
Kold-Fire's Avatar
 
Join Date: Mar 2009
Location: Germany
Posts: 195
Quote:
Originally Posted by caboydman View Post
What do you recommend as far as boost gauges go?
Since I am located in Germany I don't know all the gauges on the US market and I have my own system for datalogging and stuff, that's a question you better ask someone else... sorry... Ideal would be a gauge that is programmable or adjustable, you have an output of 0,4 Volts at 20kPa (2,9 PSI) and 4,65 Volts at 250kPa (36,26 PSI) at Pin 4 of the pressure sensor.
Kold-Fire is offline  
post #23 of 27 (permalink) Old 10-18-2010, 05:48 AM
Registered User
 
Join Date: Oct 2009
Posts: 17
STACK guages for boost pressure?

I don't know if you intend on expanding your system (ie. more guages, data-logging, etc.) but you might try STACK guages.
STACK 52mm Auxiliary Gauges

They provide data for almost anything you might want to measure and allow pretty amazing analysis later with their PC software , but they ain't cheap...

Greets,
Andrew
SLOWANDEASY is offline  
 
post #24 of 27 (permalink) Old 11-14-2010, 01:35 AM
Registered User
 
Kold-Fire's Avatar
 
Join Date: Mar 2009
Location: Germany
Posts: 195
Quote:
Originally Posted by SLOWANDEASY View Post
I don't know if you intend on expanding your system (ie. more guages, data-logging, etc.) but you might try STACK guages.
STACK 52mm Auxiliary Gauges

They provide data for almost anything you might want to measure and allow pretty amazing analysis later with their PC software , but they ain't cheap...

Greets,
Andrew
Hi!

Yeah, I naturally know STACK But it's like that, that nearly everyone wants something different to be shown, mostly it's the Oil temp, not the boost.

Cheers!
Luke
Kold-Fire is offline  
post #25 of 27 (permalink) Old 11-14-2010, 02:03 AM
Registered User
 
jojonline's Avatar
 
Join Date: Feb 2010
Location: South Germany/Lake Constance
Posts: 90
:-) ...some years ago i machined these rotors at one of our customers...

Last edited by jojonline; 11-14-2010 at 02:05 AM. Reason: where's the picture gone???
jojonline is offline  
post #26 of 27 (permalink) Old 11-14-2010, 02:46 AM
Registered User
 
Kold-Fire's Avatar
 
Join Date: Mar 2009
Location: Germany
Posts: 195
Quote:
Originally Posted by caboydman View Post
Are the differences in boost due to quality control of the Eaton chargers or something else?
An update on what I have posted previously regarding the charger problems, as I've been asked quite a lot questions about this issue. And additionally I obviously need to explain and somehow "correct" my other statement: 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...
At least it CAN be the charger's death and will shorten its and the engine's life under the circumstances I name below:

I obviously didn't explain that exact enough: every Eaton charger has 2 rpm limits that are safe, a continuous rpm-limit and a higher temporary rpm-limit.
Again, a 2.9-3.0" pulley is the smallest I would recommend for a heavy usage like "running above 8000 rpms all the time" And here we go, in Germany it's not a problem to run for e.g. 10-15mins near or at the rpm limiter in 6th gear on an empty autobahn (e.g. at night) ... And we have customers doing this. Then (with a pulley <2.9") the charger is above the continuous rpm-limit for that time and can start to pump mechanically (don't know if this is the right translation) and the screws get too near each other and the housing, and the worst case that can happen is shown on the pictures.

I know that there are cars with <2.9" pulleys out there doing fine, also we have tuned cars with such small pulleys over here, but it always depends on the usage of the car and how you drive or better, how often and how long you drive above the charger's continuous rpm-limit.

Another issue is the boost the charger produces. A stock S240 usually makes 0,5-0,55 bar (7,25-7,95 PSI) boost with a stock pulley. Now you always have to consider, that an engine like the 2ZZ-GE with a compression ratio of 11.5:1 was not build as an SC engine and that it’s just not healthy to run it with a much higher boost (Keywords: MEP (Mean Effective Pressure) or IMEP (Indicated Mean Effective Pressure)). Bun here again it depends on the usage.

Definitely running above 0,7-0,75 bar (10.15-10.9 PSI) boost with a stock engine (stock compression ratio) and externals like stock IC, exhaust, catalyzer etc. may work only just when you use the power only from time to time, but definitely not under sporting conditions.

So, apart from the charger's rpm limits, running with a smaller pulley than 2.9-3.0 (depending on the different boost caused by the production differences of the chargers) and so with a boost above 9 PSI makes more changes necessary, that then naturally depend on what one wants to achieve, under which conditions someone is driving and also, in which country

BTW Apart from tracks like NARDO in Italy e.g. or other (round) high-speed tracks you normally never run with such a high load and rpms for a time like you can do that on an empty autobahn. That’s a fact.

Last edited by Kold-Fire; 11-14-2010 at 06:23 AM.
Kold-Fire is offline  
post #27 of 27 (permalink) Old 05-27-2019, 08:03 AM
Registered User
 
Heschel Levi's Avatar
 
Join Date: Jul 2018
Posts: 12
Hey i buy a exige s 2007 with a komo tec phase 3 on it and runs fine enough and reliable for street and track. 100%recommended
Heschel Levi is offline  
Sponsored Links
Advertisement
 
Reply

  LotusTalk - The Lotus Cars Community > Lotus Discussions > Lotus Exige

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the LotusTalk - The Lotus Cars Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome