Will try. It's really wedged in there now, and I may just leave it. It is much bigger than the OEM y-pipe.

There's a guy selling his RENNtech intake on the forum now and it's off the car. That's probably a better shot to get the pics and measurements you want.

The only way any of us are getting a 127mph car is to lose weight or add a supercharger. I think 125mph may be realistic now on a completely FBO car with an aggressive tune and slicks, but if you look at the 1/4 mile times list all of the NA cars over 124mph have significant weight reduction.

 

just ran at atco... all cars there trap 3-4mph higher

 

Fair play, i can appreciate it's a pita to yank parts off sometimes esp for a dull task like this. Yeah perhaps i'll shoot TexasE63 a PM.

Didn't your car trap 125 though? Granted it was on race fuel, but still.... When are you going to re-run btw?

I have a mod which fingers crossed should be fitted and working (please Lord) by the end of this week. Assuming it's ok, I post about it and make it happen for the community too - I'm sure it will be worth 3-4mph.

This is bench racing at it's finest, but i'm going to guess that i have a ~122-123mph car (based off cars that I'm able to hang with)....3-4 would take me to ~126...a bit more would be nice. I have a feeling it'll come in the form of some lighter 18" wheels, but if I can DIY an intake then that'll be great too. However if you're saying that it's much bigger, I doubt I'll be able to make something as an amateur without upsetting the maf/airflow calibration etc etc. Not to worry

 

I don't have my spreadsheet with all my times and splits and speeds etc because that laptop fried, so I can't tell you what the best mph was that I've seen. I think I saw a random 126mph once at Island on a super cold winter night where I spun through the first 4 gears so the result is suspect. It was an outlier. My best ET came with a 122, and I've seen as high as just over 123 consistently. I doubt that I'm going to be doing much more drag racing outside from a fun trip to Atco once in awhile. The car is terrible on the dragstrip now with all the solid/spherical bushings throughout the suspension, all the negative camber and lowering, and all of the underbody bars and other subframe reinforcements. It just wants to hop and spin from a dig like that with zero give whatsoever, and I snapped an axle the last time I really tried for good times at the strip. That's not fun but if I'm just going for mph I don't really need to launch it like I used to. We will see.

An easy mod for 3-4mph? That would be huge. Give us a hint? What I'd really like to do is change the final drive to a 3.05 or 3.23 from the OE 2.82. Been looking into this but it has all sorts of repercussions for the traction control and trans so I'm a bit hesitant to go down that path yet.

Yeah, the bend for the RENNtech intake does not narrow like the OEM y-pipe. It's just one long consistent sweep from the boxes to the IM. I am pretty sure my intake has already been damaged the way I have it stuffed in there (it is against the firewall and banging against all kinds of stuff including my strut bar). I'm hoping that the ECE engine mounts lower the engine 10mm and cut down the movement because that's exactly what I need right now. Otherwise I'm going to have to bring out the hammer and start making space.

 

Ahhhh....ok i hear you. Yeah your ET will never be strong anymore. On the basis that these cars are nearly useless on the street, compared to either a proper manual car or DCT, roll races and high traps will be the order of the day anyway. i mean...We've all seen vids (and even made vids) of our tachos and roll races from 40mph...but have any of us beaten a competitive car from a dig on the street? (In Mexico of course).

Depends what you consider to be easy. I'd say headwork is hard. Headers is easy. I'd say this is in the middle.

You hit the nail on the head - I'll post more hopefully later in the week if it checks out ok, but basically my car is having a 3.06 final drive fitted (maybe even as we speak). I've paid a small fortune to have the TCU coded and yes if this works flawlessly as it should, 1) I'll become a vendor and organise a group buy and 2) with a raised rev limit in 4th gear, we will see a whole wave of faster M156 cars. I'm super super excited, but also super super nervous at the same time.

Interesting....I need a spare Y-pipe to chop up and get to work. I enlarged the airbox, but butt-dyno (didn't get a chance to actually dyno either) didn't register anything. I'd like to experiment now with a modified Y-pipe. I'll try eBay UK. Thanks man - that's pretty much what I needed to know

 

That's excellent. Are you going through limitedslip.de? Florian has a great reputation and knows what he's doing. I started looking into this last fall and was learning up with help from Diabolis on what the ramp angles and lockups mean to diff behavior and eventually got lost in an internet rabbit hole on technical geek stuff. It will give you much better acceleration and torque and more usable gears (although 1st will be useless). It sounds like all win but I've been warned that the TC ABS and other things may not like it - have you done any special coding to take the higher final drive into account? And how? Thanks for being the guinea pig yet again, I'm excited to see how this works out for you. You have PM incoming.

 

No, not limitedslip.de. A guy through a friend kinda thing. I asked if he'd be happy for me to co-ordinate on his behalf and he was good with that, but let's see if it works on my car first (fingers crossed). I've spoken with a couple of his guys in Europe when I had a business trip in Switzerland and he had a W212 E63 which was putting the gap on an E63S (W212 facelift of course). I know how slow a W212 is compared to a W204, so to gap a bi-turbo (stock PP) with just an ECU flash and 3.06 gear, the improvement is quite dramatic, eventhough it would suggest a tiny improvement on paper.

The reason I'm confident about the MPH being so much better in the standing quarter is because there's loads of meat on the bone when we would cross the line in 4th, so we can safely sacrifice some top end, to max out the gear before the shift.

Yes I've had the TCU tuned to take the higher final drive into account. I just hope it plays nicely...i hate being the guinea pig. I was the guinea pig back in the day with my Celica and although it's the strongest NA car to date, it often means you take the brunt of all costs n failures, haha.

 

Keep us posted
Looking forward to this going well.

 

Here are my 82mm velocity stacks

 

well damn those are badass - shame no one can see them inside the intake. So who is going to quit playing games and fit an sls intake manifold on their car? Thats where the rear power is.

 

I almost bought one lol

 

 

those big juicy intake runners on that SLS intake lol tell you what I'll buy your renntech box if you do end up buying it.

I've already got 3 PMS about the stacks so I'll just post it here for public knowledge (hate when people dont share things) after getting my throttle bodies and looking at the stock setup and renntech setup I knew I had to have some type of stack on them.ill trust the amg engineers and sure they did countless testing on flow benches running our engines to 7300 rpm etc.

I bought like 4 different stacks on Ebay that were just to damn big,I was cutting them and doing the best I could to get them to fit and be affective but after putting the back under plate together I was like wtf these huge stacks might be blocking airflow and had me go back to the drawing board to try and mimic the OEM stacks.

I went back to Ebay and found a guy selling intake bumper kits and just from the picture I was thinking I could cut them up and make them work so I ordered a set and after some dremel cutting and sanding I cut enough off to make them fit.

I used 4 different glues on them and might do some type of epoxy before I install them.

here is what I used!

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F11 3217449626

https://rover.ebay.com/rover/0/0/0?m...2F113217449626

 

 

This is what we have for the TB upgrade. 82 and 85mm

 

To fit the sls, you probably should use the SLS cams then a tune to remove the runner switch flapper signal and tune for the SLS cam timing and probably new spark timing too.
Then you'd want long tube headers, so as to be close to the SLS headers. Those are probably even freer flowing because there's a straight pipe portion out of the port, before the first turn.
Maybe SLS runs different spark plugs too.

Now probably there's a quick answer too. Flashing an SLS tune on a M156 ECU? Then tweaking any files that the transmission needs ?

 

Wait, BLK is going FI?

 

 

I asked blackbenz on Instagram to get a group buy going on the ess kit.

I'm far to deep invested staying na now though.my last mod on this car will be the renntech airbox

 

You dont need a group buy for good pricing, Shoot us a PM and we can get you setup without the hassle and wait of a group buy.

 

Nice! We have some good meets out here. Once you move out, you should join the AMG Socal Lounge on facebook for all the event info. Plus there are tons of good tracks out here, none of which I have had time to sample yet.

 

Got them to open 100% and car idles and drives like normal.but Dyno says picked up power in mid range for sure.

 

 

YouTube video of them opening up.

 

@BLKROKT and @Celicasaur

Thank you both (and others) for the awesome info on this thread. I wasted 45 minutes at work reading through a learning more than I ever thought I would about TBs and velocity stacks. I noticed you both are selling TBs now--are these the 82mm ones you all troubleshot in '16-'17? If so, why the sale--time for a change, different tune, or other? Just curious whether, after driving with them for a while, you decided to go a different direction. TIA.