2014 C250

Has anyone tried or heard of these? Sounds promising.

https://gfb.com.au/tms-turbo-managem...-u-T9358-38067

If it actually does what it claims, boost shouldn't fall off a cliff at high RPM on the C250. I've been logging boost and it is great to have 18.6psi From 2500-4500rpm, but the boost falls of when the variable valve timing kicks in. You get a power increase from the cam switch, but also lose it from boost dropping off.

yacoub.alyacoub

I would be interested in it, Only if someone tried it and can Give better results

Narry

We carry and have sold quite a few of these units. We've sold them to Audi, VW and Mini Cooper customers ans they've all had nothing but great things to say about the product. GFB is a pretty well established brand and we're very fortunate to be one of their distributors. They do work very well and as advertised. Hopefully some of the members that have bought from us can chime in give their feedback. If you're interested in the GFB or anything other tuning products feel free to contact us and check out our Facebook Tornado Tuning Intl.

jacosta

I installed the Diverter Valve from Go Fast Bits (GFB DV+ T9358) on my wife’s 2013 C250 last Friday evening and took it for a quick test drive afterwards and noticed that the lag from a dead stop appeared to be reduced almost non-existent. After getting back home I asked my wife to drive it to see if she noticed a difference since, it is her daily driver and I only drive it every few weeks. She would be able to better assess if there was a difference, she liked the improved response. She always had plenty of power once moving but complained about the “turbo lag” after coming to a stop. She was use to the throttle response from her old 6 cylinder G35. No comparison on ride comfort and other amenities between her old and new car C250 more refined, but the G35 definitely had better response from a dead stop. She probably should have gone with the C350, but too late to change, anyway adding the diverter valve did make her say “almost as quick as my old car”.

My only concern is that when she came back from her test drive you could definitely could smell hot metal, I think she took me on my request to drive it and see if the performance was better and she drove it pretty hard. She had a smile on her face when she came back. I asked her to drive it “normal” and we would keep an eye or “nose” to see if under normal driving we could still smell the hot metal. The next day under normal driving we didn’t smell hot metal exhaust. I’m pretty sure any car when driven really hard will produce hot metal/exhaust.

Any feedback (good or bad) on my concern would be greatly appreciated. Don’t want to reduce the life of the engine at the expense of improved or reduced Turbo Lag.


Link to Diverter Valve I purchased
http://www.gfb.com.au/products/blow-...-slk250-by-gfb

2014 C250

Great review! I'm sure the metal smell is just from running the car hard. Manifold probably got hot and maybe even turned orange! Then the cat gets hot and you get that smell. I don't think you can hurt the engine at stock boost settings, plus you will hit fuel cut if boost goes too high before damage occurs. The C250 also runs very little timing on boost which is another safety measure. Are there any US distributors? How much shipped from you Nanny? My main question though is: does this keep boost from dropping off at high rpm? It's probably worth it just for the extra responsiveness.

jacosta

I bought from www.thmotorsports.com paid $139.50. Took about 20-30 minutes to install. Engine was still a little warm when I installed, had it been cold probably could have installed a little quicker.

Prior to installing the DV I was really surprised at the torque/pull the engine had the first time I drove it. Once it gets going and the turbo kicks in engine was/is pretty responsive.

As far as boost pressure dropping off after installing the DV at high RPM I couldn't tell the difference.

For $140 I think it is well worth it to improve response from a stop, as mentioned my only concern with the DV was negatively impacting the engine life and durability.

yacoub.alyacoub

Now this sounds tempting, Thanks for your advice

As I'm in the process of installing the Kleemmann K box, fillter & Downpipe, I think adding this won't affect but improve more.

Hope to find it shipped to me

Narry

hi
the dv work with turbo to maintain more boost pressure it should not do any damage to the engine for sure
so you donot needed worry but must undertand modern cars are filled with electronics anything is possible
yesterday i get a e90 bmw just deleted the error code and the dme and key got erased so all is possible
but the good part is this dv is plug and play you can remove it and put back stock for warrantly claims if required

Knightmare69

Weird, I had responded to this thread but it wasn't posted for some reason. I have the DV+ also and found it to be a welcomed mod. My car holds boost better and is more stable, the boost doesn't drop unless I let off the gas. Because my car is running the 5G tranny, it's more of a highway cruiser and with the DV+, it really allows my car to shine at highway speeds. I tend to run out of straight roads more than boost.

yacoub.alyacoub

Nice, interesting.

I'm now set on researching and placing an order this weekend

as being in Qatar I find it cheaper to have it from Australia
http://www.gfb.com.au/products/blow-...-slk250-by-gfb

than from the motorsports

http://thmotorsports.com/gfb-go-fast...i-2134613.aspx

Robert Watson

Just ordered mine, and will have that installed on the 4th along with the water methanol kit, fail safe gauge, oil catch can, and a surprise part too!

yacoub.alyacoub

Just ordered mine

Can't wait to have it here in Doha

2014 C250

Ordered mine last Sunday. Soon as I install it I'll log boost and see how much more it holds after 4500rpm. If it hold just 2psi more, that should be good for 20 peak whp (at least in a perfect world of 10hp per 1psi boost). Upgraded IC is next after this. Anyone ever measure the pressure drop of the stock IC? Sometimes just an IC upgrade with less pressure drop can net 1-3 more PSI boost with no other changes. Now if we could just control that pesky overboost fuel cut...

2014 C250

How are you measuring boost? Do you have a boost gauge?

WhiteonBlack

After you guys get the product would one of you do an install thread on it? Would love to get this if it works like everyone says but don't really have an idea how to install it lol

Knightmare69

Yes, I have a AEM boost gauge. However I had problems with conventional install methods as none of them read vacuum. In the end I ended up tapping directly into the intake manifold.

Spd Racr

any tips for getting to the three bolts that hold the DV in place. with all the tubes and angle i am finding it difficult to get a socket wrench in there and be able to turn. I can't seem to figure out how to undo the intercooler pipe that is right in the way either.

2014 C250

I think if you use a ball head type allen key, it will work much better than a standard one. The IC pipe is a clip type release. You probably got it figured by now though. Does anyone know if this valve sounds any different than the stock one? Does it even make a sound? Does the car have a Diverter and BOV. With the intake I can hear more boost release just not sure where it's coming from.

yacoub.alyacoub

Mine just reached doha but are held with customs hope fully By sunday I shall receive it and get them installed

If anybody have a DIY with photos it will be very helpfull

Knightmare69

I just used a small ratchet and some patience, you don't need to move anything. The inside bolt you'll need an extension and to feel around with your fingers. Takes about 45 min total.

yacoub.alyacoub

I think I will try to take photos when I do the install

Robert Watson

Just hit 20psi tonight. Will see how it reacts with the fuel cut defender I ordered. Install on water methanol kit is waiting on custom air flow meter spacer to tap into, and intercooler NOS kit will be here by Monday too.

c204coupe

I just installed the diverter, 2 notes on the install #1 remove the charge pipe, makes it a lot easier and gives extra room #2 try not to drop the parts in the area between the inter cooler and radiator (a real ***** of a time to retrieve). So all total install time took no more then 20 minutes

I would of taken pics, but lazy


Noticed an increase in response from from dead stop, could be from having car in drive mode, under S and ESP off. When doing a burnouts prior the car would fight to burn, now it's not really fighting so much. From full stop to around 90mph, did not notice too much drop from shifting points, acceleration seemed more fluid.

Car seems a bit faster, as well you can hear the PssSSSST from the boost letting off with the new diverter valve,when shifting or letting off gas a little more.

Cost around $112us +shipping
ebay like $90us +shipping (best offer)

Would I recommend? Yes I would.

Spd Racr

Any tips on how to remove the charge pipe? Can't figure out how it disconnects.

c204coupe

push it towards the turbo (away from you), pull the little thin metal bar towards the opening(close to you)use a flat head screwdriver and pry the side of the little metal bar up, pull on charge pipe a little, once you have popped up one side, then move screwdriver to other side, pry up a little and pull off pipe.. best advise I can give, not much force is needed to remove it