[charliesum]

spot on review
mine also makes the car quite unresponsive when cold - even the missus says that its slower than her 8 yr old tt
im taking mine up to evolve on thurs to get them re sighted - i had them fitted in dec by regal but when i said they were rattly he just said if you want to mess with cars you must expect something different! - not the answer i was expecting but mine definately dont sound right very raspy around 2.5-3k and its getting worse like they are leaking - so will see after thursday

[doughboy]

The turbo connection alignment is pretty critical to keep the pipes clear of each other and clear of any other structures on their torturous route through the engine bay.

I had new turbo to downpipe gaskets and new V band clamps fitted at the same time, just seemed a good idea considering the effort.

The turbo/downpipe gaskets are a thick metal/fabric crush-type so they are not really re-useable, and the old v band clamps were rusty as hell.

[m1bjr]

Originally Posted by doughboy

The 2 less restrictive secondary cats are still in place further back (335i has 4 cats in 2 pairs) and they are sufficient to pass an mot.

At the moment.

That will change this year, when testers will be directed to more stringent 'model specific' emissions levels.
And then there is the 'prescence' checks that tells then there should be two cats.

Charliesum - you may now be hearing the wastegates rattling...

[doughboy]

Originally Posted by m1bjr

At the moment.

That will change this year, when testers will be directed to more stringent 'model specific' emissions levels.
And then there is the 'prescence' checks that tells then there should be two cats.

You're right, but the model specific limits are generally less stringent than the generic BET test, or at worst only marginally tighter. Our cars are well, well inside the current MOT limits, so removal of 50% of the CAT will still be OK. (hopefully)

If not it'll be £140 to take them off and then a quick ebay sale coming up!

My 1st MOT is due March 2012, but i'll be geteting it done early in late 2011 which will give me a year to worry about amy new rules....

More worrying it the new MOT element of a visual inspection to the ECU - bad for peeps like us with a JB3 etc. But TBH I can't see anyone looking without suspicion.

[m1bjr]

Originally Posted by doughboy

You're right, but the model specific limits are generally less stringent than the generic BET test, or at worst only marginally tighter. Our cars are well, well inside the current MOT limits, so removal of 50% of the CAT will still be OK. (hopefully)

If not it'll be £140 to take them off and then a quick ebay sale coming up!

My 1st MOT is due March 2012, but i'll be geteting it done early in late 2011 which will give me a year to worry about amy new rules....

More worrying it the new MOT element of a visual inspection to the ECU - bad for peeps like us with a JB3 etc. But TBH I can't see anyone looking without suspicion.

I wont worry, just remove it as its only a 15min job at worst.
The point I make about visual was not the ECU, it was about your missing cats.
Just because you still make emissions target wont exempt you from the visual check.
Early days anyhow, it may take the average tester years to get all the data, and then apply it

I thought you would be JB4 by now.
Do you need a cat fix for the JB3 as I have one here....

[335i E92]

Good to heard your feedback amigo...

Gutted your having a few niggles, I spoke to Imran today regarding some of the issues with noise and cold starts. He thinks they might not be sitting flush with the turbos as the noise (rattles) & shivers are definatley not normal with the upgrade.

I would seriously consider speaking to woods regarding the instalation. I would have also expected you to feel an increase in out n out power aswell as the improved throttle response, strange!!

I've decided to sell my dp's and buy the Forge IC as funds are really tight with the wedding and I can't afford a full stage 3 right now along with the iminent Eibach arbs & M3 bushess upgrade. Times is tight!!!

With the intercooler and a little boost tweak from Evolve I'm gonna be pushing 390 horses anyway. TBH my car is also screaming out for a quaife LSD, which is more important than a stage 3. Starting to get proper fooked of with the spinning inside wheel everytime I wanna play.

Hope you resovle your niggles, to me it's not normal. Speak to woods!!

Cheers

H

[doughboy]

Originally Posted by m1bjr

I thought you would be JB4 by now.
Do you need a cat fix for the JB3 as I have one here....

Thanks, but I got the BMS DPfix from AR with the pipes on a deal. I decided it best to hardwire the DP fix into the car harness, not the JB3 harness, otherwise when you remove the JB3 you'll get the Emissions warning (a sure fire MOT fault or warranty buster).

The same applies with the CAN based JB4 DPfix, as soon as you remove the JB unit you'll get the emissions warning back - that's a loser for me.

Originally Posted by 335i E92

Good to heard your feedback amigo...

Gutted your having a few niggles, I spoke to Imran today regarding some of the issues with noise and cold starts. He thinks they might not be sitting flush with the turbos as the noise (rattles) & shivers are definatley not normal with the upgrade.

H

I've been back to Woods and there is no way the pipes are not seated fully at the turbo, we used new clamps and gaskets and the sound is not a blowing noise (you'd really know about a leak there).

There is no 'rattle' as such, its just the metallic rasp when the ignition is retarded during the fast idle period on a cold start, your regular 335i sounds barky at this stage too, so the Decat just amplifies the sound.

The noise is gone when the fast idle period finishes.

If you open the bonnet it's quiet as normal in there, it's just 'new' sound from underneath the car.

I might video it and post on youtube just to get some opinions.

[fastloop]

Yeah, post a video of it.

The only downside with catless DPs are that the primary CAT muffles the wastegate noise by quite a bit, so if your wastegates are rattling then you'll definitely hear it. Cold starts are the worst until the fast idle stops/ exhaust flap opens.

Can you hear the wastegates rattle if you blip the throttle?

[zltm089]

videos pleaseeeeeeeeeeeeee

[doughboy]

Originally Posted by 335rocks

Yeah, post a video of it.

The only downside with catless DPs are that the primary CAT muffles the wastegate noise by quite a bit, so if your wastegates are rattling then you'll definitely hear it. Cold starts are the worst until the fast idle stops/ exhaust flap opens.

Can you hear the wastegates rattle if you blip the throttle?

On idle / start up the wastegates are fully open, i.e. well clear of their seats, so no rattling should be heard then.

There's no rattle if i blip the throttle.

[fastloop]

Originally Posted by doughboy

On idle / start up the wastegates are fully open, i.e. well clear of their seats, so no rattling should be heard then.

There's no rattle if i blip the throttle.

Lucky you, but I'm pretty sure that they are almost closed during the fast idle phase as mine rattles really bad when it's cold. As soon as the fast idle phase is over it's much better, but you can definitely hear them rattle if you blip the throttle. You can hear the metallic rattling as the RPMs drop. When it's warm its less intrusive, but it still ruins the enjoyment when the windows are down. So this is next on my list to get sorted before the summer.

The problem with the wastegates actuators are they are really hard to get to and require specialist equipment to adjust and calibrate properly, so it's almost a dealer only situation. I'm not aware of any Indy's adjusting or replacing these. The other issue is if replacing the actuators doesn't work, then it's new turbo's. AFAIK the book time is ~ 6 hours to replace the actuators vs. 11 hours for new turbos. But if the actuators doesn't fix it then it's might be cheaper to go for new turbos in the first place. Bit of a dilemma and I guess I'll have to see what the dealer says.

[Alpina_B3_Lux]

Originally Posted by 335rocks

The problem with the wastegates actuators are they are really hard to get to and require specialist equipment to adjust and calibrate properly, so it's almost a dealer only situation. I'm not aware of any Indy's adjusting or replacing these. The other issue is if replacing the actuators doesn't work, then it's new turbo's. AFAIK the book time is ~ 6 hours to replace the actuators vs. 11 hours for new turbos. But if the actuators doesn't fix it then it's might be cheaper to go for new turbos in the first place. Bit of a dilemma and I guess I'll have to see what the dealer says.

Birds should be able to do that. Also, you could get the upgraded wastegates from Turbo Dynamics for your turbos, that should solve the problem. Still a lot of work and book time, though, that's for sure.

Alpina_B3_Lux

[doughboy]

335rocks,

At idle are you sure its a rattling and not just the spitting / resonance cause by the ignition retard? This is standard practice these days at cold start to get as much heat as possible into the stage 1 CATS quickly to help get cleaner emissions more quickly. It would make no sense for wastegates to be closed at this point as it would only reduce the gas flow to the CATs.

I can't think of any case where wastgates would be closed under no load conditions.

A throttle blip is different though, that should pull them shut in anticipation of boost requirement.


Mike at Darren Woods is a veteran N54 actuator / wastegate & turbo exchanger / fixer from his time at a main dealers and now as an Indy.

They're in Manchester though, so Birds maybe better for you.

[335i E92]

Hi Mike

Just came acress this on N54 tech whilst looking for afix for my rough idle.

Might be your problem.

http://www.n54tech.com/forums/showth...ght=rough+idle

[doughboy]

Interesting read!!

Mine has no rasp/rattles after the 30 second fast idle though, its perfectly quiet then on normal idle.

The turbo noise kind of sounds like a 330d at town speeds, a bit of whooshing up and down as you gently accel / decel.

[fastloop]

Originally Posted by Alpina_B3_Lux

Birds should be able to do that. Also, you could get the upgraded wastegates from Turbo Dynamics for your turbos, that should solve the problem. Still a lot of work and book time, though, that's for sure.

Alpina_B3_Lux

Last I spoke to Kevin about this they had not done any, but it was something they planned to look into when they had time. I should probably check again to see if anything has changed? The tricky part is having a calibrated vacuum tool to adjust the actuators when the downpipes are off. Rear actuator should be fairly straight forward to get to, but the front one is a nightmare.

Regarding Turbo Dynamics then I don't really see this as an option. Taking the turbo's off to get this fixed and send it off is not cost effective. Specially not when the new turbos are "only" around £1K+VAT for the pair vs. TD fix at £200+ per turbo. Paltrys also didn't have a good experience with this, so any problem here and the savings are gone.

Originally Posted by doughboy

335rocks,

At idle are you sure its a rattling and not just the spitting / resonance cause by the ignition retard? This is standard practice these days at cold start to get as much heat as possible into the stage 1 CATS quickly to help get cleaner emissions more quickly. It would make no sense for wastegates to be closed at this point as it would only reduce the gas flow to the CATs.

I can't think of any case where wastgates would be closed under no load conditions.

A throttle blip is different though, that should pull them shut in anticipation of boost requirement.


Mike at Darren Woods is a veteran N54 actuator / wastegate & turbo exchanger / fixer from his time at a main dealers and now as an Indy.

They're in Manchester though, so Birds maybe better for you.

Definitely rattling, but there could be some spitting/resonance at start up. You can really hear the WGs rattling in the 2nd video. When staring my car next to Tony's, there is a noticeable difference.

This is from last autum.

I'll speak to Birds, but Manchester is not that far away, so it's good know and have a few options.

[willhollin]

When did you have the 2CV engine put in Lars?

[fastloop]

Found it cheap on fleabay. It's one fast 2CV.

[doughboy]

Jeepers!

Mine definitely doesn't sound like that!

That cold start video sounds horrendous - is it stil like that Lars?

[fastloop]

Camera mic is probably a bit sensitive, so it sounds worse than it is. I'll try to grab a new video to compare it against, but it's definitely something that needs sorting.

[charliesum]

almost exactly the same sound as mine too !!!

[m1bjr]

Originally Posted by doughboy

335rocks,

I can't think of any case where wastgates would be closed under no load conditions..

Depends upon which version of software you car employs.
Those noting rattle got an upgrade that repositions the idle wastegate position.

Hard to tell without a very knowledgable dealer.
Blipping throttle wont be sufficient load to call for boost, so unlikely they would close any more than they are.

Im liking the new JB4 btw
Steve