hooleyboy

This could be old news to some, but new to others. I know some of you know that the 82mm throttle body of the 550's is an option when looking for a larger throttle bady. Today as I was fiddling around the shop, we had an Audi S4 V8 in for some work. Turns out the S4 V8 (want to say it was a 2004-2005) has a Bosch 82mm throttle body identical to the Mercedes, even the plug.

So I hit ebay and they are all over the place for round the $200 range. Just wanted to share this with you guys if you are in the market for a throttle body. You still have to come up with a way to mount it though. Heck maybe I will bust out AutoCAD and have a mounting plate machined out.

Anyway just some FYI, happy modding.

shardul

iTrader: (1)

man that is crazy. if you can machine an adapter plate i think a lot of poeple will buy them.

splinter

Good stuff, hooleyboy.

Wonder if their internal electronics are the same, or perhaps retrofitable?

RenntechE55

that would be nice compared to $1800 some one should buy one and try mount it.

jturkel

hooley

will it fit on the 32? i think i would still need to make the rear s/c housing larger anyway without that plate

blackbenzz

I noticed that when I pulled an RS6 motor, I thought I posted that. I think there were some slight differences. Next time I am at my friends house I will compare the MB 82mm tb with the Audi one

dyno

Ahah .. I knew that you were looking for some new finding

... and you got a Bosch pn 0 280 750 003 for the Audi ?


I m also looking into these throttle bodies but not easy:

1- for the 550 engine (motor 273.960) I found an MB pn 2731410325 but I think it cannot be a 82mm TB as it is shared by too many other smaller models , so maybe I found the wrong number
and i cannot find Bosch pn for the 550 TB


2- then, the V12 TT has a pn 2751410625 but we already know for sure it is a 78/80 mm
(btw, its Bosch pn is 0280750125 )

there also a newer pn for the V12 TT but in any case it is not a 550 engine


Indeed I was looking for something bigger so I checked for pn of the older V12 NA which has a single Tb: pn is 1371400101 but have no clue what size it can be (but the number is quite similar to the SLR TB which I equally don't know what size is it !
EDIT: the Bosch pn is the same as for the SL 476HP ... so it should be 74mm only !)

... if Bosch had a catalogue showing diameter spec, that would be fun

Ali_E55

if my tuner didn't scratch and removed the number from my TB i would've gave it to u guys

sorry

dyno

it will not take a lot ...

prodigymb

thanks for sharing hooley. i'm gonna look around see if i could find one...

dyno

really is it .. it is considered suitable for 203-204 and 209 series also !

dyno

don't know if I'll get it ..
I m not so convinced, expecially because SLR works that good with a simple 74mm TB

JustPete

Though I could be wrong. I believe it will also require a new intake to match the overall dimensional changes beyond just an 82mm mount.

Is there any concrete data on the benefits of the larger TB's?

I have a hard time believing MB put a smaller one than optimum for the SC.

There's a lot to be said for importance of velocity with intakes vs volume.

Just thinking out loud here ... would love to see some data.

Exotic-metal55

Will the 82mm fit on the 80mm Inlet housing? I think my 80mm TB shorted out and I need to get something quick. Need an inspection but can`t keep the TB working right.

A welded adaptor plate, would be the best. I found from my last adaptor that potential air leaks are common. Then you get the idle control error all the time.

What is the part number for the 80mm TB , that you do not need to switch the wires on?

Thericker

You're doing some solid good deeds I haven't seen any 600/65 model V12tt's w/upgraded 82mm mods, anybody know if there's similar power to be gained in this application

JustPete

Any data ???

hooleyboy

Now I got to play the waiting game to get a throttle body. Once I have the throttle body It wont be long until I have a mounting plate machined.

c32AMG-DTM

Check bassn 07's dyno chart on page 3 of this thread:

https://mbworld.org/forums/w211-amg/...nt-tuners.html

Ignoring the other issue being discussed, you can compare the custom PC tune to the PC tune 82mm on the dyno chart for the results of a larger TB on the 55k motor.

Ali_E55

it plugs with the original

but u have to switch 1 with 4
and 5 with 6 to make the 82 work 100%

dyno

idle and part throttle passage, still normal ?

aleksandar1099

Like this one?

http://cgi.ebay.com/ebaymotors/THROT...ht_2293wt_1116

RenntechE55

I think that ones off a 2.7L Bi-turbo , Im not sure if is thats the one he is talking about but we have a family Audi allroad which has that engine , I'll check when I get back home

BMOCLAN

Where is the throttle body located on the C32? Thanks in advance

shardul

iTrader: (1)

at the end of the s/c right by the firewall

AMS Performance

Hey Hooley,

Whats the opening on the intake manifold itself? Do you know exactly in mm? just curious to see exactly what the opening is because that would serve as a limitation to just how big you can go.

btw, older V12 TBs are not that big (if you are referring to the M120s) b/c they used two throttle bodies, once for each cylinder bank. If I am not mistaken they were somewhere 64-68mm, definitely not 74mm+.