Results from the Dyno
Former Vendor of MBWorld
Joined: Sep 2008
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AMG
Do not take a dremel to your TB....
Intake is a waste of money on the M113s, the stock one flows nicely just as is with K&N filters.
throttle body will help a small amount (maybe 8-10HP at most). Don't compare to FI guys, remember you have an NA engine and throttle bodies on NA engines do not produce nearly the same gains as on FI cars so you are comparing apples vs. oranges. Its the LAST mod you should ever do and most of the gains will be in the higher rpms, won't do much for low end.
Intake is a waste of money on the M113s, the stock one flows nicely just as is with K&N filters.
throttle body will help a small amount (maybe 8-10HP at most). Don't compare to FI guys, remember you have an NA engine and throttle bodies on NA engines do not produce nearly the same gains as on FI cars so you are comparing apples vs. oranges. Its the LAST mod you should ever do and most of the gains will be in the higher rpms, won't do much for low end.
MBWorld Fanatic!
Joined: Oct 2005
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From: PNW
2001 E430
I have a set of phenolic spacers I'm planning to install. I doubt they will make any difference except slowing down the heat transfer a bit longer.
Former Vendor of MBWorld
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AMG
Yes, but what these amateur DIYers don't understand is they are dremeling it completely the wrong way. If you want to do it properly you need to completely machine the front halfshaft and leave the entire rear shaft in place. You NEED those threads on the back halfshaft otherwise you risk damaging the threads and even worse what if a screw gets loose and falls into the engine (which will inevitably happen). Knife edging won't help much, plus you need a good angled seal. Removing the front halfshaft will do much more than knife edging the throttle plate. Even so... all these changes will make a very minor difference compared to a significantly larger diameter bore.
Hopefully some of these guys read this before they make a big mistake....
Hopefully some of these guys read this before they make a big mistake....
Super Member
Joined: Apr 2002
Posts: 592
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From: Sacramento
AMG C43, 1999
If you were to machine the TB shaft you would want to do it so the shaft is shaped like an airfoil. So the front half of the shaft when the TB is opened all the way should remain at or near the stock dimension and then the rear or trailing edge of the shaft would be tapered back to form an elongated tear drop shape. The front of the tear drop shape would be facing the airflow and the rear of the tear drop shape would allow the airflow to smoothly reattach itself as it comes over the shaft.
If you machine it the other way, with the tapered edge facing the airflow then you would certainly lose airflow due to turbulance through the TB. Knife edgeing the TB plate most likely achieves no real gain in airflow and could really mess up the idle rpm and idle stability.
Jeff
If you machine it the other way, with the tapered edge facing the airflow then you would certainly lose airflow due to turbulance through the TB. Knife edgeing the TB plate most likely achieves no real gain in airflow and could really mess up the idle rpm and idle stability.
Jeff
Thread Starter
MBWorld Fanatic!
Joined: Feb 2009
Posts: 1,375
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From: Seattle, WA
C55
Do not take a dremel to your TB....
Intake is a waste of money on the M113s, the stock one flows nicely just as is with K&N filters.
throttle body will help a small amount (maybe 8-10HP at most). Don't compare to FI guys, remember you have an NA engine and throttle bodies on NA engines do not produce nearly the same gains as on FI cars so you are comparing apples vs. oranges. Its the LAST mod you should ever do and most of the gains will be in the higher rpms, won't do much for low end.
Intake is a waste of money on the M113s, the stock one flows nicely just as is with K&N filters.
throttle body will help a small amount (maybe 8-10HP at most). Don't compare to FI guys, remember you have an NA engine and throttle bodies on NA engines do not produce nearly the same gains as on FI cars so you are comparing apples vs. oranges. Its the LAST mod you should ever do and most of the gains will be in the higher rpms, won't do much for low end.
Some of the members on the W211 page have done this on their cars. They dremeled the pivot shaft to a smaller diameter which gives more flow but they didn't increase the overall TB diameter. Over on the Crossfire website some of the guys have also knife edged the TB plate.
I have a set of phenolic spacers I'm planning to install. I doubt they will make any difference except slowing down the heat transfer a bit longer.
I have a set of phenolic spacers I'm planning to install. I doubt they will make any difference except slowing down the heat transfer a bit longer.
Please keep us updated on how the phenolic spacers do on the w211! BTW you should like, give me your brakes
Last edited by RLx02; Mar 5, 2010 at 01:45 AM.
Thread Starter
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From: Seattle, WA
C55
Are there any other larger TB's from other cars that can bolt on with few modifications? A member in the w211 that I met at the dyno meet had a larger audi TB that he bolted on and only had to cut off a small flange but it works just fine from what I remember.
Former Vendor of MBWorld
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AMG
Thats what I was thinking. So in your opinion port and polishing the TB is pretty much worthless? Only people who are forcing large amounts of air into their intake manifold would need a larger TB so I decided that 2000 dollars for a TB is a waste of money if it only makes ~10hp. I think for the 5.4 n/a motor really all you can do is exhaust work, tune and a pulley while keeping it N/A without breaking the bank.
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Super Member
Joined: Sep 2011
Posts: 706
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From: Lebanon & Nigeria
W209 CLK55 AMG Kompressor, ATV BRP 800 CAN-AM
My Friends How's everyone? I need some help...I have Clk 55 2004 year,just have a tune on it and k&n filters,looking forward to improve the power & torque but i dont want to spend much money...if any can give me some help or suggestions,i would really appreciate it !
PS: Resonator not deleted, Cat not deleted,Everything concerning the exhaust system is still stock and original
Thanks&Reagrds
PS: Resonator not deleted, Cat not deleted,Everything concerning the exhaust system is still stock and original
Thanks&Reagrds
