[Vince@ V K Motorwerks]

As many of you know we have been working on a turbo solution for the 335i. One of the set-up being discussed was a rear turbo set up. Like this one:

This would probably be the easiest turbo upgrade to do and therefore, the cheapest. It is very common with the American car market but not so common with European cars. Just wanted to get your thoughts on this.

-Vince

[E92Pilot]

This would work on the non-turbo 3-series.

[Mr. 5]

I've seen this on an e60 M5. It had twin turbos like this configuration.
When I see this, I see tons of lag!!
The piping going from the turbos to the intake is so incredibly long.
I just can't see the drivability with this setup to be good for a daily driver.

[munters]

+1
and not really stealth as well

[inthemiddle]

Originally Posted by Mr. 5

I've seen this on an e60 M5. It had twin turbos like this configuration.
When I see this, I see tons of lag!!
The piping going from the turbos to the intake is so incredibly long.
I just can't see the drivability with this setup to be good for a daily driver.

+1 based on limited knowledge/fear..... I'm not a tuner... but more of a semi-educated enthusiast... know enough to be dangerous... maybe make incorrect assumptions as well.... ..but also make some pretty decent educated guesses... probably similar to a lot of your market...

my first instinct says tons of lag....

regardless of how well it works or not.. it seems like it would be a tough sell... (just look at the psi problem with the intercooler...getting people to understand that)

[NYBMW335]

I always wonder with these kind of turbo setups if fast cooling would be a problem. I know a little about metal and i know if it gets really hot and the all of the sudden you throw water on it it could seize. Wouldn't this be the case with a turbo setup like this??

Again i don't know anything about turbos so please inform me.

[joec500]

Seems like too much going on...I feel for the most part, Euro Enthusiasts prefer a more integrated approach to upgrading, especially when the cars are newer.

I don't see this selling well in this crowd. Let's leave the jerry rigging mods to domestic tuners

[munters]

Yup, I would not buy it...

[O-cha]

Um, have you even done any recon? Where do you plan on running the charge piping to the intake? There's barely any room. It works on those cars because they have large engine bays and space between the fender an body, this car does not.

[BoostedBMW]

As Mr.5 pointed out, my first thought was about how much charge piping you need to run back to the front of the car. I actually had that discussion with a shop owner a few months back when he was installing a twin turbo setup on a customer's C6, and he said that lag wasn't really an issue at all, and since there was clearance for the piping it was a good setup. I've never had a setup like that before so I can't comment on it, but I would think that it would induce a hell of a lot of lag. Maybe that isn't an issue on a 6.0L V8, but don't you think it would be noticeable on our cars?

[bdkevoIX]

Eh, I'm not much of a remote-mount turbos either. From what I understand, the hot side needs to be adjusted for being too far away from the runners. It could be a good system if designed right, but I don't see the point in 335i.

[jpsimon]

lets stick to a normal setup

[Garissimo]

If you look at the round trip path the air going to the turbo takes - down and back the full length of the car 3 times - there is simply no way get the responsivity of a traditional turbo system. Any heat benefit you get from remote mounting the turbos is overshadowed by the inefficiency of the air routing. You're probably losing a lot of exhaust gas energy.

And the guy may have some unique pressure capture system, but that's a kludge to overcome a very fundamental flaw with this architecture.

[bdkevoIX]

^ remote mount set up has smaller turbine housing typically.

[Vince@ V K Motorwerks]

good discussion, keep it coming. Not that we will build a remote mount system but wanted to know your thoughts, thanks.

[scheherazade]

Where are you suggesting to relocate?

In the picture it's a rear bumper...

But could you be suggesting something like : in front of front-left wheel, behind the screen?

Or up in front of where the air box is now?

edit : if you re-locate to elsewhere in the engine bay, I imagine it'd be fine...

-scheherazade

[BALLAJL15]

I have never seen the turbos in my car so I don't really care where they are located as long as this will make more power. That's the point of an upgrade... lag will always be presant...

[turb0]

Originally Posted by BALLAJL15

I have never seen the turbos in my car so I don't really care where they are located as long as this will make more power. That's the point of an upgrade... lag will always be presant...

yes but less is always better than more

[mwahlert]

my friend had the sts setup on his 05 gto.

100% stock motor, larger injectors, new fuel pump, 8.5psi.


505whp, 550wtq...... you gotta love 6 liter engines on boost

but no way i would ever consider running a setup like this on my 335. when you already have a 400hp 6 liter you aren't too concerned about lag - when you have a 45k+ bmw w/ an engine half the size i would expect a more traditional setup. also - remote setups are not any simpler to install on cars that are already FI - you add complexity w/ large amounts of plumbing, etc.

[Curt2000]

This would solve the real estate problems under the hood but most customers would shy from such a system simply because it is unconventional and they do not understand it.

However, if you have a remote mount kit that is just as capable as a top mount or some other type of relocation kit that keeps the turbo(s) under the hood and the remote mount is a large percentage cheaper...I think you can start making believers out of us!

[DANMACINSD]

I saw a similar setup at the SD auto show on a new Hemi Challenger. He had them up closer though, near the bell housing. You could see them easily because of some mirrors he had underneath. My worry is what if I ran over a piece of trash that flew off some dude's truck heading to Tijuana? Or what if you run through a big puddle in the rain? It said the Challenger had 930 HP by the way...so it must work fairly well.

[Former_Boosted_IS]

I personally think a single is the way to go. I the design will be quite difficult, but this is the route to go with the amount of room available.