Hammer Down

Does anyone know who makes smooth TB Tubes??

Hammer Down

I'm looking for smoother tubes that connect from the airbox to the TB

Zod

am not sure what u are refering to. Do you mean the Y pipe?
if so you have the stock 1 and the 80mm 1

if there are others, where have u seen them?

dyno

MKB makes an Y pipe that is considered very efficient

.. unfortunately, not for sale separately from their kit

Zod

got any pics?

and are u sure it is a Y pipe and not just a full airbox mod?

dyno

it is just better shaped to avoid turbulences (Helmholt effect I think)
I already posted last year
.. too lazy now to look into my posts


i even asked them to buy but got reply not for sale alone

Hammer Down

look at the rubber tubing that connects from your airbox to your
TB it is rippled and may not flow air as smoothly.

Zod

i know what you are talking about, but i listed the only two mb options i know, hence why i was asking where u saw a smooth one, and even if you did, how do u know for a fact it is better?

then ask the question..why is it rippled?, am sure it is not just to mkae it look pretty

sneakyneon

I keep looking at the whole thing, I can't help thinking a smooth single 3 inch with a cone filter would not be better?

dyno

smooth pipe would not be better ... that helical stock design is not made that way just for shake .. it helps airflow and avoids unwanted turbulences

Hammer Down

If you look at a VRP or Renntech airbox they completely eliminate the hoses making that section smooth for extra air that will be flowing to the TB due to the larger airbox. Can't we do the same with some nice semi flexible smooth silicon hoses?

dyno

if you are referring to their carbon Fiber airbox I m not sure it is classified among performance mods .. and the airbox was not larger volume

even that FANG tentative retained stock hoses ..

imho, I would only make a better Y-pipe and bigger Airboxes

btw, even gruppeM who made bigger airboxes .. retained stock hoses

I would be curious to see how that tract of SLR is made. I tried to get an exploded view of the intake but seems doesn't exist
.. we are sure only about its bigger than our 's airbox

blackbenzz

I think that is what was being discussed. I agree that a bigger y-pipe would help free up alot of flow. I went to a single pipe design because I felt the E55 airboxes and y-pipes were restrictions (although looked much cleaner/cooler than my current setup). Again, that's just my opinion.

Hammer Down

Hmmmm, so could a single intake design work on our cars?
BB do you think it will flow enough air?
Do you have any pics of your setup for those of us that not had to privilege to see your car in person?

blackbenzz

Yes it can work.

On my setup the outlet of the y-pipe had a measured ID of 72mm I believe. This was the biggest restriction along with the MAF housing (E55's don't have), and tubes from airbox to y-pipe. I have replaced the y-pipe with a single 3.5" diameter pipe (85mm) and CNC'd a piece for my MAF sensor to slide into. I also routed air through my headlight to the filter, although I have now lost he "ram air" effect. So now the smallest diameter piping on my intake is the TB, which is 82mm This caused my car to have a massive increase in airflow and max out the injectors so I think it's safe to say it is flowing more air than before

It ain't pretty but it gets the job done (excuse the crappy cell phone pic quality lol), I may want to go to a bigger filter soon or maybe even make a y and run a filter to each side. For now it flows plenty, until I get the SLR injectors installed and retuned. What you don't see in the pic is a heat shield over the headers. You could build a box around the filter to shield it from the engine bay heat and possibly wrap the intake pipe in heat wrap

dyno

ciao BB !
it s not only a matter of size
yes, considering the bigger TB, also a bigger Y and bigger hoses (while possibly retaining the same design) and everything down to the car's grille, would be desirable.
but, mainly, I think it could be useful to make a better designed Y : unfortunately now it is not exactly an Y .. the correct design should have a "tongue-like protrusion" where twin duct merges into one ..
do you know what I mean

blackbenzz

I know what you mean. Having that made is not easy. Also, I feel like the oval tubing from the airbox to the y-pipe is restrictive as well as the airbox itself. It's hard to argue with results so I would love to see someone take on the challenge. We need more people to tinker with mods in order to get the best out there instead of letting tuners charge an arm and a leg for a product thats not proven