CHIPS, not Ponch and John
MB
It's seems that in most of the posts on chiping people talk about plans to intstall a chip. I'm hoping someone can share thier results. What about Wetterauer chips?
I only know of one person that Upsoluted his car on this forum and that's Mark Cummings. He seems to be happy with his decision. He ordered the Kleemann pulley kit which is what I want to see the results of. It won't be in for a few weeks as they are still tweaking the design. The pulley is going to be the best bang for the buck in torque and HP other than NO2. The pulley manufacturers claim asm much as a 38 HP increase and as much as 42 ft. lbs of torque. I haven't seen anything to substantiate these claims but I'm waiting.
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All MB cars will OE have 5,3 % Co = lambda 0,85 at full engine load. To add more fuel will not give one singel HP, to an engine which already is haveing exactly the amount of fuel to run perfect.
You can even go back to 1 - 2 % Co. level without loosing power,
but ofcause with great risk of burning holes in the pistons.
With a chip tuning, there is power gain in changeing ignition timing and run with higher timing curve. To combine with a pulley
kit which gives far more than a chip, can be a little dangerous.
To run with higher boost and higher timing than OE at the same time, can cause detonation......Be very careful not to mix too many
things working in oposit directions.
The Best of Mercedes & AMG
Why change a chip and give the car more fuel ??????.
All MB cars will OE have 5,3 % Co = lambda 0,85 at full engine load. To add more fuel will not give one singel HP, to an engine which already is haveing exactly the amount of fuel to run perfect.
You can even go back to 1 - 2 % Co. level without loosing power,
but ofcause with great risk of burning holes in the pistons.
With a chip tuning, there is power gain in changeing ignition timing and run with higher timing curve. To combine with a pulley
kit which gives far more than a chip, can be a little dangerous.
To run with higher boost and higher timing than OE at the same time, can cause detonation......Be very careful not to mix too many
things working in oposit directions.
1) Under added boost you are likely too need more fuel otherwise you'd run too lean and as the piston arrives at TDC the corresponding expansion of gases due to ignition would be lacking the required force to drive the piston back.<BR>
2)Your point regarding detonation is well taken; however, I am not so sure that a forced induction engine which already runs a lower compression ratio would be subject to it unless you advance the timing too aggressively. <BR>As I understand it in order too have detonation ignition of the fuel / gas mixture must occur prematurely while the piston travels to TDC on the compression cycle. It could happen, I guess if chips push the timing curve that much. But the boost would have to be so great as to superheat the gases in the cylinder thereby causing dieseling.<BR><BR>What do you think Lucas?
1. first of all it's not neccessary to change anything at the chip
to keep up the perfect Co% level ( 5,3%Co, Lambda 0,85 ) by fitting a pulley kit.
The ECU have between 20-30 % extra to give, this means you
can boost up the engine with 20-30%, and just by driving on the
road for 150-200 miles, the ECU will adapt it self.
It could be, that the engine will run a little lean in the begining, but after a little while it will slowly start to reprogram and will
end up giving exactly the same values, as when the car was stock.
This is why I say, why change some thing which anyway adapt it self, and always seek the perfect settings it self.
2. What I said was, be careful when you are dooing both, higher
boost and at the same time higher timing curve, can be a dangerous experiment, in the hands of a driveway mechanic.
Don't play with it you self go some where and seek proffessionel
help.
Mr. Earp
1. first of all it's not neccessary to change anything at the chip
to keep up the perfect Co% level ( 5,3%Co, Lambda 0,85 ) by fitting a pulley kit.
The ECU have between 20-30 % extra to give, this means you
can boost up the engine with 20-30%, and just by driving on the
road for 150-200 miles, the ECU will adapt it self.
It could be, that the engine will run a little lean in the begining, but after a little while it will slowly start to reprogram and will
end up giving exactly the same values, as when the car was stock.
This is why I say, why change some thing which anyway adapt it self, and always seek the perfect settings it self.
2. What I said was, be careful when you are dooing both, higher
boost and at the same time higher timing curve, can be a dangerous experiment, in the hands of a driveway mechanic.
Don't <I><u>play with it</u></I> you self go some where and <I><u>seek proffessionel
help.</u></I>
Last edited by WyattEarp; Feb 27, 2002 at 06:06 PM.



