loudandheard

So I've been snooping around the E55 forum and was looking at their throttle body ideas. So far what I have found out is that anything over an 82mm throttle body will require tuning. If you stay right at 80mm or below no tuning should be required.

To get the best results the supercharger rear housing needs to be ported as well. Headers will also net you a good gain with the larger throttle body, with this increased air flow you would definitely be able to take advantage of your larger pulleys.

I think that the c32 uses a 74mm throttle body similar to what the E55 uses, I just find it weird that the sl55 splitter is larger than the splitter that came on our cars if we are using the same size throttle body.

You can have your 74mm throttle body bored out to almost 80mm, but I think the best they can do is 78mm.

As for the 80mm throttle body, those can be sourced from 600's engines. The throttle body found on the 600 engines are 80mm, but there really isn't too much more porting that can be done to them.

The 82mm can be found on the 550 engines and they can fetch a pretty penny. I believe that this throttle body is plug and play for the E55, I have no idea if it will be for the c32. I think these can be ported to almost 90mm, but I have heard of problems and errors you can get when going that big.

Another inexpensive way of sourcing the 82mm is from audi v8 engines. The throttle bodies can be sourced from $250+ which is a bargain when compared to the 550 throttle bodies that can range from $800+. The thing with the audi throttle bodies is that you would need to redo the pins and the plug, but they can be swapped with the one from your own throttle body. The bolts may not line up and you may need to get creative to get it to fit.

There is also mention of an adapter plate, but I haven't gotten that far yet. You will also need a larger y splitter to fit on the 80mm/82mm throttle body.

I found a stock E55 throttle body, rear housing, and y splitter on ebay for a great deal and plan on experimenting with it to see how it works. The next step would be to get an 82mm throttle body and see if we can use it in our cars. I think Fluid Motor Union used an s600 80mm throttle body, so we should be able to make this work for us as well.

One thing I that's been bothering me is the lack of sharing info, I feel like a lot of people hide the info thinking they can make money off of us. Why can't we just share the info and make more progress. If some one can do the work and offer it for a great price and still make some money on the side great, but we should be able to do a lot of this stuff on our own. Sorry about the rant.

Here are a few pics of the E55 throttle body I purchased.

OverDrive

Really good info, The throttle body is one of my many projects.... Right now I'm working with Rob (needwings) to come up with a way to provide aftermarket intake manifolds. (Nothing official or put to plan yet, right now its just talk and providing measurements) The Throttlebody along with Intake Mani's, headers and pulley....... can picture it now So are we 100% sure that the s600 plugs right in as far as the harness goes?

Gramma_Benz

Awesome! Thanks man and good luck!

loudandheard

I would like to say that it should be, but I would need to check and see if my plug is the same as what the plug is on the e55 throttle body. I know that Fluid motor union did it, so I would think it should work, but still not 100% sure.

I think that I am going to shoot for an 82mm throttle body and hope I can make it work. I found a few part numbers that could help as well, but take in mind that this is for the e55, I'm not sure if this info is applicable to the c32:

Here are the part#'s for those interested;
-MB 82mm t/b: 2731410325
-82mm t/b gasket: 2731410680
-80mm s/c inlet: 1131400912
-s/c inlet gasket: 1131410780
-80mm Y-pipe: 1130900329
-O-rings for Y-pipe: 90025K396 (mcmaster.com)
-s/c to head intake gasket: 1131410980
-you will also need gaskets for the surge tanks, not sure what that part# was.

Here's a good thread:

https://mbworld.org/forums/w211-amg/...b-install.html

jturkel

what are your current mods? are you worried about fuel? have you considered upgrading the fuel pump and/or injectors?

i'm pretty sure if i add more mods to my car, i'll start running lean (i think at the very very top of 4th i just barely start leaning, but it is not unsafe...just reaching max power on current fuel flow rates).

if it works, i may follow suit, and i'm local now

btw...IIRC, i thought i read somewhere that the max you could p/p our stock 74mm TB was to 76.5 without messing with the butterfly

loungn14

Your on the right path. I was one of the only ones that did this with my C32. I think even me and josh did talk about this. Just port yours and be done with it. There is even a co that does it for ya.

You need to tune for the extra air, it will help, and you need to look closely at injectors, and monitor accordingly.

I also had custom manifolds as well. I just modified the oem's.

loudandheard

How big were you able to get yours, up to about 78mm? What do you think would happen if we went bigger? What was done to the manifold?

loungn14

you would throw codes. Port both the tb as well as the sc "snout"

loudandheard

My only performance mods currently are a 178 pulley, sl55 splitter, and LET h/e. Mods that I have that I have not installed are headers, phenolic spacers, and pte thermostat. I also plan on reworking my exhaust, but every thing is on the back burner until I figure out the leak I have. I'm hoping it's just the transmission, but I have not had the time to check things out.

I'm trying to get the car in tip top shape before any of the major mods and tuning are done. My oil change is up to date, coolant fluid has been change and new pump already installed, changed out the power steering pump and added new fluid, NW PSK, new super charger bearing, and new belt.

All I need to do now is change the differential fluid, transmission fluid, change the O2 sensors, and find the leak. I already have the trans fluid and dip stick, but I need to buy the gasket, filter, and other misc parts.

I plan on buying the nw oil catch can and gaskets and do the install with the phenolic spacers. I want to install the high flow cats and exhaust that I purchased a while ago and I might do the brabus vents in the hood.

All of it will be done in phases and then the final step will be the throttle body and the tuning. I also have a lot exterior mods that need to be installed and a few things that I need painted, but that's another thread.

loudandheard

I've read about the codes, but I'm not 100% sure I will have them. A lot of the codes had to do with the throttle position during idle and the computer thinking that the car had a leak and was compensating for it. Another issue was incorrect wiring and the throttle body not working correctly. I'm going to see if I can figure it out. I guess we'll have to see.

jgsx

My c32 throttle body needs to be replaced. The price quoted was about $1500 for parts.

Is the e550 tb a drop in replacement?

loudandheard

No, the throttle body from the e550 is an 82mm and it would require that you modify the rear supercharger snout. The e55 has the same throttle body as the c32, so you could source an e55 tb and be good to go.

jgsx

The e55 throttle body is a direct replacement / identical part as the c32 tb?

loudandheard

It should be, what's wrong with your throttle body?

hasse_231

I have an c32 amg 2001 and was looking for more power so iam thinking to replace the trottle to an 80 mm insted.

Do a trottle from an cl600 2003 fit in ?
Could i buy an inlet from an e55 amg bolt on ?
And gasket ?

The electronic fit in Or do i have to change cabels ?

Iam looking for the easy way out of this project ?

loudandheard

From what I have read, the cl600 throttle body should be a 80mm tb. You would need to port the opening of the rear supercharger housing to 80mm or you could buy a new rear supercharger snout from a 2006 sl55, apparently the supercharger snout is already 80mm. You would also need to change the pins for the the throttle body cable, so that the blade opens correctly. Read through this thread and you should be able to find a majority of the info.

These are the part numbers you would need, but the part number for the throttle body is for an 82mm tb. I think the rear supercharger snout from the sl55 goes for $300+. Take in mind that part only comes on the newest sl55 and did not come on the older 55k models. I could be wrong, but the part number is down low.

hasse_231

Okej thanks for the help but if i install 82 mm tb should i reprogram the ecu? I read some where dont remember it now.

but all these parts fit c32 with out any bigger problem ??

loudandheard

From what I've read we would need a retune. I can't remember exactly why, but I think it has to do with the new amount air flow.

I have a majority of the parts, but I have yet to try it. I only know of fluid motor union and eurocharged adding a larger throttle body to a c32. I think fluid motor union added a 80mm throttle body and I think eurocharged just ported the stock throttle body.

A lot of people said that there isn't enough room to fit such a larger throttle body, but I think if the rear supercharger snout is modified correctly, it should fit with out a problem, but we'll have to see.

Does anybody know if the e55 rear supercharger snout would fit on the C32? I have compared them up close and they seem to be about the same size, but there are a few differences. I'm going to see if some one could help me modify the e55 super charger snout and then maybe I can get started on this project.

hasse_231

is this trottle nr 1111410325 the same as you prefer ?

hasse_231

I gona go on a 80mm tb from a cl600 2003
It seems to be problem with an 82 mm tb what i read. Okej the pins have to be changed. I have allready sl55 intake, y pipes allso called right ?

So the inlet should probably have 80mm oem ? Diffrent info everywhere.

If i use an 80 mm tb i probably dont need an adapter for the throttle right ?

in that case jag only have to buy a tb ? with gasket ? And try ?

TruTaing

Have you guys tried grinding down the tbody shafts? :x IIRC, the e55 guys do it pretty commonly for some easy gains.

02C32guy

The SL55 isn't larger diameter-wise than ours. It just provides more space between the throttle body and fire wall allowing better air flow.

loudandheard

That makes sense considering the throttle body is the same size.

jgsx

My c32 tb is damaged. I asked my shop about picking up an e55 tb and installing it and they had no experience.

Has anyone actually put in an e55 tb into a c32? Is it a bolt on? Are the harnesses going to plug in directly?

hasse_231

i did cheek my throttle today and its 74 mm even the inlet 74 mm and there arent any space i think to install an 82 mm throttle with adapter.

So do someone have any number on a cl 600 throttle from 2003 ?