chiromikey

those look like a very easy install...which to me means you could easily do a before and after dyno and probably not even have to remove the car from the machine. (hint, hint)

E55 RUSS

Steve how do they cost and does Wetterauer quotes those 30HP figures...

My friend had Wett Ecu on his E55 and he siad its grap, went back to stock...

rflow306

They look to be nothing more than egr valves, so unless the factory ones leak. I really don't see 30 hp from this mod, hopefully you will be able to install them on the dyno to verify Steve.

stevebez

The full 598hp wett package costs around ~$6000, thats pulley, software, this valve setup - which I am begining to regret I ever mentioned - and think thats it - O yes and the 3 year driveline g/tee, for cars less thasn 3 yrs old.

I reckon if they get me close to 598 with their package , I have the slightly bigger ASP pulley than theirs (I hate this pulley BTW its all rusted up - I need to get the Evotech I think) and I have the VRTB and VRAB on board I should be over 600hp. They dont add headers, cams or TB.

All I know is my buddies Wett SL55 kicked my butt in an informal drag race and in VMax when we went to the event recently he got 184 and I got 172 ... your milage may vary

These valves need ECU programming to get the max out of them - as per Wett message - I dont think there is much benefit from the simple bolt on - but I dont know.

These valves do protrude quite a bit ... and the engine cover does not seat so you have to make some cut outs for them which - to me - actually looks quite good... Ill post up some more pics when I am back under the hood. In my rush to get the job done I could have done a better job of the cut outs but its only friggen engine cover...

I have to say there are allot of doubters out there... which is a little surprising... but proof is in the pudding right? Ill get to a track when all is installed nothing like a decent trap speed to see what real power you are making ...

Finny

These valves are activated only on cold start through a remote vacuum solenoid valve controlled via the ECU.

This lets the air in from the electric blower which is located next to the air-matic pump. The whole purpose of this setup is to pump more air into the exhaust manifold via the heads to allow the cats to heat up faster and help burn off the rich start up mixture. Emissions application.

It may appear that the plumbing through the supercharger is related to boost but it unfortunately has nothing to do with it.

I have puled this section apart and none of the plumbing is connected to the boost section of the charger.

Would be interested though to know how this mod could increase or recover power. So far I'm at a loss.

I have also seen these valves also on the SLR moded E55 in Dubai.

Dose the installer offer any explanation of how their system works?

stevebez

Other than this

.... no. But I will push them on it further...

stevebez

To where in the charger does the pipe feed into? I.e. what section ...seems like it goes into the gearing case?

Finny

It's completely isolated from the charger.

On the left side standing in front of the car one outlet is capped off and the other go's to the L/H valve.

Right, pipe from the air pump go's just under the R/H valve outlet pipe.

Then... from the valves to the heads via the exhaust outlet where it's plumbed through the heads.

This will enrich oxygen content in the exhaust to help fire up the cats on a cold start.

It's got me phucked how any power can be made here. Can't wait hear Wetterauers explanation.

I hope we can all learn something here!

stevebez

Ive sent them this and await a reply...

Interesting comment on that diagram is "mostly used at startup" ... if not only at startup then when else? Also interestingly they require ECU changes to get the quoted power increase, so there might be more to it ... who knows

Also where is the ferking smog pump then ???

stevebez

The Wett reply is they change the pressure on this valve which when modified allows more O2 to the oxygen sensor (they don't say if its on the intake or exhaust side) and then adapt the ECU to react to this higher oxygen reading... I think its maybe got something to do with the MAF and car not having an air flow meter ...



I still don't get it 100%

Anyone care to shed some light onto this explanation?

Finny

It can only go to the exhaust side which is where you will find the o2 sensors.

Well that means the electric blower has to be on to gain 30 ponies???

30 ponies from a small air blower?

Sorry mate can't get my head around this one...???

Something sus going on here I think.

stevebez

I dont think they are saying the small blower is adding boost I think they are saying there is more O2 hitting the sensor than with this higher pressured valve...

Unfortuantely its quite diff to get it clear as I speak to my mate who speaks to the Wett main man - who is german and who's english is a bit rough ... in the translation that ensues allot of info is lost or misinterpreted unfortuantely...

Track time soon and then we shall see if I really have ~600 ponies or not...

What trap should I expect wih 600hp?

Finny

Anyway, the valves look very pretty.

stevebez

Yeah true but 30hp would be better...

Vadim @ FD

Something is not right.

Unless, this is just another product that they can sell and make money from. Most 55 owners have no idea what these valves are.

I can not see enough air flowing through these valves to add 30HP.

stevebez

These valves are part of the kit ... they are included. They do not sell them as an extra over the package ... so why go to the all this trouble to make these up if you dont need them...why not just sell the package without them?

The other thing is the kit is Germany TUV approved so there needs to be some confidence in their product and that the kit works... however this is done.

I still dont understand it and will keep pushing them for more info... from what they have said so far there is some interaction between, the pump, the higher trigger pressure, the O2 sensors and the ECU / software that allows them to suck more out of the motor ... I just got to figure out how...

stevebez

Sorry I am lost ... what electric blower and where do these valves connect to it?

stevebez

Took car for drive last night and it flet v stong but I have not driven it for 2 weeks, so it always takes a little while to get accustomed to the torque...

Getting the ECU done tonight... and then Ill take it for another drive. And to the track soon...

Finny

There is a small electric blower located next to the Air-matic pump which is under the front headlight. Just follow the rubber pipe from the charger. When you first start the car from cold you will here it activate. A lot of the guys in the past were concerned about the noise it made as it sounds like a vacuum cleaner.

I think that if the kit was TUV approved it would most likely comply with the strict emissions laws after the power was tuned up so it would make sense these mods were done to help the upgrade comply with authorities.

But I'm still sus on the relationship it has for directly making more power.

stevebez

Yeah ... cannot be a direct relationship ... it has to be related to ecu tune somehow... if it is turned on at higher rpm ... then all the ecu would see is a leaner picture of an already rich mixture which is going to help no one.

msheredy

From what I have read they (Wett) are utilizing those actuators in a different matter. I take it like this, during startup they (actuators) would be pumping in oxygen via the air pump to cut emissions as normal. Then say under heavy throttle they (Wett) program the ECU to trigger that air pump again which puts more oxygen into the exhaust where the O2 senors sees this extra oxygen and in turn tells the ECU to put more fuel into the mix. Does this make sense?

Finny

It runs rich enough without dumping more fuel in.

Anyway, under heavy acceleration the air pump wouldn't have the pressure to resist the exhaust back pressure...

The jury is still out...

Vadim @ FD

Makes no sense at all. Does it mean they can not control fueling?

The valves only breathe into first two cylinders which would confuse DME even further.

Jakpro1

Plus I thought the goal of most tuners was the get the car running a bit more lean, yet still keep that performace.

Riching up the mix would yield???

I can see the meeting at Wetter. right now, "There on to us Klaus. Damn you MBWORRRRLD!!!! Pull the product ASAP!!"

chiromikey

apparently their u.s. distributor doesn't know anything about them either except that along with an ecu tune there's a 35hp gain. unfortunatley they can't prove it because they've never actually installed a set.