Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-08-2000, 04:43 PM
Registered User
 
Join Date: Sep 1999
Location: SW Colorado USA
Posts: 296
In my quest to get more power from my '90 M103 I think I have found one limiting factor. I would like to add a vortech supercharger to the engine. It seems that engines that use a mass airflow system to calculate the fuel metering are easy to modify. If you add more air they add more fuel within the limits of the injectors. I am not sure which system is on my truck, Bosch LH maybe. How does this system work? Does it use a speed density system with a computer map, reading the various sensors, throttle position, temp, rpm etc. to determine fueling from a programmed set of variables? I would guess that this type would be very difficult to program for more airflow. I know my 944T uses a vane (barn door) type sensor to measure incoming air. I do not see this on my M103. Any clarification of the workings of this system and any know ways to alter it would be appreciated.

------------------
90 300GE 5sp
95 740iL
86 944 Turbo

Reply With Quote
  #2  
Old 09-08-2000, 05:26 PM
Registered User
 
Join Date: Sep 1999
Location: SW Colorado USA
Posts: 296
Looks like I may have K-Jetronic, a mechanical continuous injection system. I have to check the owners manual to be sure. I can't seem to find the info on the truck itself anywhere.

------------------
90 300GE 5sp
95 740iL
86 944 Turbo
Reply With Quote
  #3  
Old 09-08-2000, 05:39 PM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Your 103 motor uses KE 3.1 and has a airflow door very similar to the 944 except it controls a hydraulic system rather than an electronic control.

The system should do well measuring the extra air you will pump. If you need more enrichment a auxiliary control of the EHA should be able to give all that is necessary.

------------------
Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician
Reply With Quote
  #4  
Old 09-08-2000, 05:54 PM
Registered User
 
Join Date: Sep 1999
Location: SW Colorado USA
Posts: 296
So the door opening actuates the size of the oriffice in the fuel disributer via hydralic fluid? Once airflow has maxed out the size of the opening in the dist. how does an EHA supply more fuel. By the way could you define EHA for me? I know that I could monitor the mixture via a sensor in the exhaust. Would this EHA have any sort of variable control to fine tune the mixture?

------------------
90 M-B 300GE 5sp
01 Volvo V70 T5
86 Porsche 944 Turbo
Reply With Quote
  #5  
Old 09-08-2000, 06:19 PM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
The EHA (electro-hydraulic actuator) provides all the mapped enrichment for the system, from starting enrichment to cold running enrichment, acceleration and closed loop operation it is all done at the EHA.

I seriously doubt that you can blow enough air into that motor to bottom the airplate but normally this would be accomodated by running the system at a higher pressure.

------------------
Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician

Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
95 s500 coupe stereo questions GurlTech Car Audio and Multimedia 0 12-16-2004 12:06 PM
Newbie 93 300TE 4 MATIC questions p-car993 Tech Help 9 04-01-2004 05:51 PM
Some technical questions, need your help! super3day Tech Help 6 08-24-2002 08:19 AM
Questions questions questions... Ashman Tech Help 7 05-03-2002 02:32 PM
2000 CL500 Technical Questions is4b2rd Tech Help 3 01-05-2001 02:28 PM



All times are GMT -4. The time now is 04:21 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page