who wants to get more hp m111?
Thread Starter
Junior Member
Joined: Jul 2006
Posts: 72
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From: Toronto
c230k
who wants to get more hp m111?
Ok everybody i have tested this mod for about 1 month and now i will share
with everybody.
there is a way to increase boost by tricking ME(engine computer).
1) Open your hood
2) remove front and rear engine top covers.
3) locate MAP sensor black sensor with 3 wires going to main harness.
4) cut wire that has brown stripe.
5) solder inline 4000 ohm wire and use shrink tubes to cover open wire.
After that your ME will see 2psi boost, thus no limit for boost
with everybody.
there is a way to increase boost by tricking ME(engine computer).
1) Open your hood
2) remove front and rear engine top covers.
3) locate MAP sensor black sensor with 3 wires going to main harness.
4) cut wire that has brown stripe.
5) solder inline 4000 ohm wire and use shrink tubes to cover open wire.
After that your ME will see 2psi boost, thus no limit for boost
MBWorld Fanatic!
Joined: Jun 2002
Posts: 7,265
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From: So. Oregon Coast
C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort RIP
Yes, I would like to know how you found out.
Constant boost would likely result in lower mileage.
I potentiometer could be interesting.... try different resistances.
Or be able to turn it back to 0 ohms when you just want normal driving.
Constant boost would likely result in lower mileage.
I potentiometer could be interesting.... try different resistances.
Or be able to turn it back to 0 ohms when you just want normal driving.
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Joined: Nov 2001
Posts: 6,211
Likes: 2
From: Laguna Niguel, CA
This is the silliest thing I've ever heard. First off, 2 things affect boost, 1) spin the s/c faster by using a different pulley, 2) manage loss by having the most efficient path from s/c to tb.
So prove it, show us the boost on a boost guage before and after......
So prove it, show us the boost on a boost guage before and after......
Thread Starter
Junior Member
Joined: Jul 2006
Posts: 72
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From: Toronto
c230k
Originally Posted by C230 Sport Coup
Yes, I would like to know how you found out.
Constant boost would likely result in lower mileage.
I potentiometer could be interesting.... try different resistances.
Or be able to turn it back to 0 ohms when you just want normal driving.
Constant boost would likely result in lower mileage.
I potentiometer could be interesting.... try different resistances.
Or be able to turn it back to 0 ohms when you just want normal driving.
I was thinking about it for awhile and at first i had vacuum bleed valve
before map ,same results, down side was check engine light, that is how i figure it out to restrict signal to ecu. I do have vacuum/boost gage in the shop but it is huge so when I will get proper bracket to mount it in the car then for sure pictures will be available.
Thread Starter
Junior Member
Joined: Jul 2006
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From: Toronto
c230k
Originally Posted by Buellwinkle
This is the silliest thing I've ever heard. First off, 2 things affect boost, 1) spin the s/c faster by using a different pulley, 2) manage loss by having the most efficient path from s/c to tb.
So prove it, show us the boost on a boost guage before and after......
So prove it, show us the boost on a boost guage before and after......
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Thread Starter
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Joined: Jul 2006
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From: Toronto
c230k
Originally Posted by pugguy2001
Nice trick. Will this work on the M271? How did you find out about this?
tuning of potentiometer i must have access to star diag. to delete check engine light, and to monitor MAP sensor and it is very hard because of new manager.
(((Maybe snap-on computer can do same thing hmmm…
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Thread Starter
Junior Member
Joined: Jul 2006
Posts: 72
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From: Toronto
c230k
Originally Posted by Outland
Interesting. At what point does the ECU bleed the boost?
when you go over 4800RPM bost increases very poorly and after 5000 it is stable,so with asp pulley and that map sensor mod i have 10psi boost.
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Joined: Aug 2006
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Originally Posted by Benztecg
It may, my friend has 2005 c-classe with 271 engine the only problem during
tuning of potentiometer i must have access to star diag. to delete check engine light, and to monitor MAP sensor and it is very hard because of new manager.(((
Maybe snap-on computer can do same thing hmmm…
tuning of potentiometer i must have access to star diag. to delete check engine light, and to monitor MAP sensor and it is very hard because of new manager.
(((Maybe snap-on computer can do same thing hmmm…
Just use a basic OBD2 scantool and plug it to the connector below the steering column and read the fault and clear it.
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Joined: Nov 2001
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From: Laguna Niguel, CA
Originally Posted by Benztecg
It depends on altitude of the vehicle,which gear engaged,rpm.
when you go over 4800RPM bost increases very poorly and after 5000 it is stable,so with asp pulley and that map sensor mod i have 10psi boost.
when you go over 4800RPM bost increases very poorly and after 5000 it is stable,so with asp pulley and that map sensor mod i have 10psi boost.
Junior Member
Joined: Aug 2006
Posts: 20
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I noticed it also depends on air temperature. When holding at 5,500 rpm on the dyno the boost fell from 10psi to 3psi. I think the ECU pulls back the boost when the air temperature goes high. We then replaced the stock intercooler to a bigger one and the boost held steady at 11psi.
Thread Starter
Junior Member
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From: Toronto
c230k
Originally Posted by Buellwinkle
I still dont' understand, I got 10 1/2 PSI with the ASP pulley on my 2002 C230 6-speed (slush boxes got 10 PSI) and that's with no map sensor trick.
Like country version coding.Or maybe you can reach even more with map sensor mod.I have to get different boost gauge and retest it.If you could tell
me actual value for your map sensor at idle...than could figure it out .
Senior Member
Joined: Mar 2006
Posts: 274
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From: rochester, MI
2002 C230 K, 6 speed
Originally Posted by Benztecg
That is really strange,because with no map sensor mod i had 8.5psi w/asp pulley !!! Maybe it has something to do with version coding of your ecu?
Like country version coding.Or maybe you can reach even more with map sensor mod.I have to get different boost gauge and retest it.If you could tell
me actual value for your map sensor at idle...than could figure it out .
Like country version coding.Or maybe you can reach even more with map sensor mod.I have to get different boost gauge and retest it.If you could tell
me actual value for your map sensor at idle...than could figure it out .
Thanks.
Thread Starter
Junior Member
Joined: Jul 2006
Posts: 72
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From: Toronto
c230k
Originally Posted by arell
8.5psi thru out the entire revband? or 8.5psi at high rpms (i.e. >5,000)?
MBWorld Fanatic!
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Posts: 7,265
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From: So. Oregon Coast
C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort RIP
Bump!
Please post pics, location of wiring, where resistor is wired in,
wattage of resistor? You mention resistor is getting hot, so
do w need a heat sink, or larger pot?
Busy yes, but this is really good stuff.
Please post pics, location of wiring, where resistor is wired in,
wattage of resistor? You mention resistor is getting hot, so
do w need a heat sink, or larger pot?
Busy yes, but this is really good stuff.
MBWorld Fanatic!
Joined: Jan 2006
Posts: 3,212
Likes: 8
From: Pasadena, CA
2002 C230K, 2013 BMW 328, 2015 BMW X5
When questioned about how the horsepower numbers he was claiming this member was quite elusive. Then mysteriously he posted about his car being vandalised and being bought out by insurance.
You may want to search all the posts this member did to look up the details. This mod is rather iffy.
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