bayhas

Hello all,

I am in the process of upgrading my TB to something bigger, choosing between 80 and 82, each has pros and cons in terms of ease of installation and components price, however, all of that aside (money and ease of install), I wanted to hear from those that did the swap, particularly 82mm, was there any negative impact on idle quality, hesitation, throttle blip performance, and general drivability?

dont get me wrong, saving money is awesome, and extra 10HP are awesome, but keeping the Merc driving like a Merc is my top priority, because its my daily driver

bayhas

@Shardul

shardul

iTrader: (1)

Key here is to use a OEM MB 82mm TB and not a Audi one with a MB cover or a pin swap.

bayhas

Thank you for the super quick response, yes! For 82mm i am considering a 273 body from S550 or GL550 among others with M273 engine.

For 80mm i am considering 113 part number from 2007 SL55 or 275 part number from SL600 or SL65

So considering ideal parts, is 82mm setup 101% streetable and does not negatively affect all aspects of drivability, compared to 80mm?

latemodel21

Hi Bayhas
I installed the 82mm (correct mercedes version) on my SL55 (2003) and it is 100% streetable. When I first installed it, I just had EC send me an updated tune and it worked great. I later (a couple of months ago) had EC remote tune it on a dyno and we got it up to 521 RWP (with kleemann headers , 168 lower and 87 upper pullies) .

Worth mentioning, the 82 measures 82mm , however, I seem to recall that the 80 (used on 2007, 2008 SL55) actually only measures 78mm.

Cheers,
Chris

bayhas

Chris!

Great to see more of my BenzWorld buddies here as well...

This is actually another reason why I was asking about the smoothness of 82mm setup, because the largest stock setup for SL55 was the 80 nominal/78 actual, and the 82 nominal/82actual is a significant jump up from stock...

With the mentality of nothing in this world comes for free, I was afraid of shakes and roughness to be the downside of largest throttle...

But with your and Shardul's advice, I think I can comfortably opt for the 82mm solution...

Time to locate a decent 273 141 03 25

latemodel21

A couple things to keep in mind ...

You may want to start planning early as to which y-pipe solution you will use. using the 80mm y-pipe on the 82mm TB has been an easy way to keep your engine looking original (use square O-ring(s) to seal), however, that y pipe was out of stock world-wide a year ago (don't know if they ever made more). You can also buy some rice (oops, my bad, I meant "nice") collections of tubes and spectre filters, etc ... I ended up using a carbonio CF airbox which I had to open up to fit the 82mm. ( I am happy with my choice).

If you will be using a carbon fiber airbox/y-pipe (rentech, carbonio, etc), you MUST make sure your new throttle body ends up in the stock location (see TB adapter, below).

TB adapter ... bolt-on solutions are crude at best (and tend to reduce the room that your y-pipe lives in) ... and will most likely preclude using carbon fiber air box. I bought an 80mm TB snout and added material (TIG) and then machined out the opening to 82mm (and drilled/tapped for new bolt pattern). Many have had fine results modifying 74mm snout. I did some light porting in my snout, hard to say if it helped.

Your car may not have come with the throttle body extender harness (many models including E55s, did come with them glued into TB connector). Using one (properly secured to TB) seems to reduce the "lay down"(accompanied by odd ESP failure codes) that intermittent TB connections often cause.

While you have it all apart, consider inspecting/cleaning (the stepper/wiper area) of the bypass throttle as you will NEVER get a better chance.

ALSO, inspect your harness (that passes under the TB into the valley, connecting to the knock sensor before exiting at the front) for nicks ... I had 2 different fuses that would blow on occasion (one blew twice 20kmiles apart) that were cause by 2 different wires shorting to the block where the harness passes under the TB.

hope that helps,
Chris

shardul

iTrader: (1)

I can get you a New OEM 82mm TB

BlackHammer

Waste of money. IMHO you would be better off buying Shardul's intake spacer kit.

hamann1000

where is the best place to buy this kit as a whole? I see people on ebay are selling them for $400. Will the ebay kit work?

BlackHammer

you need a new y-pipe fitting that is additional $260+ and hard to find. Install may require welding. All for. 10th of a second in the quarter mile. Do a search on the topic. Lots of posts.

SL55GT

I'm also upgrading to 82mm but deciding which way to go .
already have throttlebody and YPIPE


The VRP bolt on adaptor with ported snout kit is easier to install for me VS a 80mm snout and modifying it (welding redrilling).


Couple of questions


-Will the 80mm Ypipe definitely fit with no problem at all after adaptor plate is fitted ? . (I believe the bolt on adaptor is thinner than a weld on)


-is the 80mm snout better in flow than the 74mm snout.?


thanks guys.

99lightning

im willing to bet if someone sent a snout to jokerzperformance he can do wonders with it. he ports tons of inlets for ctsv's and knows alot.