kjlindgr

This has been discussed quite a few times, I know. Just thought I'd share my experiences as well. There are probably easier ways to accomplish this task, but I made the most of what I had and it all worked out pretty well.

Fitment is perfect. Idle is perfect.



82mm throttle body straight from Mercedes. This is $800 in a box:



Nobody seems to want to share the part number with the world. I think that's just silly:



I found a hunk of 1/2" thick aluminum plate and started making the adapter plate needed to fit onto the stock supercharger snout:



Using a hole-saw, I cut the throttle body inlet hole undersized, just to remove most of the meat:



Then used a boring bar to bore the hole to size:



Here's the finished product with holes drilled and tapped:



Here's the stock supercharger snout. I cleaned it up a little and removed all the miscellaneous fittings and other fun-buttons:



A good visual to see what 74mm looks like compared to 82mm:



I made a little jig to hold the snout at the right angle and got busy with the boring bar again. Indexable carbide cutters rule:




Tack welded onto the newly bored supercharger snout:



All done:




I didn't have any baseline numbers to do a before/after comparison...plus, my engine setup is completely different from before so I don't have much to compare to as well. Anything that helps the engine breathe better is a good thing.

Enjoy!

Karlson

wow! very nice. Since you got your TB from the dealership, you won't have a CEL, right?

shardul

iTrader: (1)

nice fabrication work!

kjlindgr

Nope, no CEL.

ronald7410

Wow suprised it all fit. Nice build

loudandheard

I thought that the rear supercharger housing needed to be ported to see the best results or were they just referring to enlarging the opening where the throttle body goes?

tgoss

Very cool install man! Love the homemade adapter plate Nicely done.

Forrest Gump 9

The shop that did my set up did the same thing. Except for the welding the adapter plate to the SC inlet, I asked them to use the counter sink screws to screw into the stock holes. That way I can easily reverse back to stock (this when I still have warranty).

stevebez

Nice tools!

BTW is this TB plug and play any rewiring needed?

shardul

iTrader: (1)

All MB 82mm are plug and play

debamassi

Why would it matter where the TB came from?

c32used

Ali_E55

very nice work. i really liked your job.

keep the beast modded.

pullejo

I was just going to say the same thing. Damn. Reminds me of a quote from Fast Times at Ridgemont High...

"Relax, all right? My old man is a television repairman, he's got this ultimate set of tools. I can fix it. "

E55Bullet

awesome! can you make me an adapter plate?

kamilclk430

Will this work the same on a Sl55 AMG? or will I need something different? What about the wiring like asked above?

iAMGod

^^ I believe we already have a 80mm TB....if you want to do all that work for 2mm diameter gain, your keen!

kamilclk430

How do I know I have a 80mm? is there a way I can find out?

fibercus

Very nice work! Thanks for sharing

jmf003

2003 SL55s have the 74mm TB. MB switch to an 80mm later. Maybe 2005?

iAMGod

Cheers for the clarification - what type of gains can be seen with an 82 as opposed from the 74?

saleen01

awesome DIY, i wish someone made this plate for all of us.

SamBoler

Thanks for sharing the great info.

What car was available with the 82mm TB?

pearlpower

e550 2010
ml550 2008 - 2010
g550 2009 - 2010
clk550 2007 - 2009
slk280, slk350 2009 – 2010
cls550 2007 - 2010
s550, s550 4-matic 2007 - 2010
cl550 2007 - 2010
gl450 2007 - 2010
gl550 2008 - 2010
e550 2007 - 2009

Chris Buffalo

Wow. Fantastic work. If I send you mine, how much to do the same to mine?? Lol