[Beisofmarko]

Hey, last summer i got my turbos replaced and they rattled somewhat on accerlation right away..

Now after i installed VRSF DP's last weekend, the rattle became pretty loud.

My question: On procede, i have wastegate position set at default 90%.
Can i raise this value? to 95% or 100% or will this cause problems?

From my understanding many have reduced this value up to 30% to get rid of decel rattle,
but since i have rattle on accerlation shouldn't i try to raise it?
or am i totally lost.

Also i read someone got rid off the accerlation rattle with playing on WGDC's?

- Rattle seems to go off 95% when i unhook vacuum lines from turbos.
- With Procede maps 1&2 rattle is 95% gone when revving in neutral??
- Maps 0,1,2 All rattle the most when accerlating with gears 2&3 somewhere around 2-3k rpm

Any ideas / tips ?
- Thanks!

[Komec]

No kai nyt oot ihan perus temput tehny ensimmäisenä, eli uusinut KAIKKI alipaineletkut? itelläni rallatti aivan vietävästi kun taaemman turbon alipaineletku oli painunut kasaan. Ei kyllä musta pitäs uusien turbojen rallattaa jos alipainejärjestelmä toimii niin ku pitääkin.

(Just asking if he has replaced all vacuum lines)

[Beisofmarko]

Originally Posted by Komec

No kai nyt oot ihan perus temput tehny ensimmäisenä, eli uusinut KAIKKI alipaineletkut? itelläni rallatti aivan vietävästi kun taaemman turbon alipaineletku oli painunut kasaan. Ei kyllä musta pitäs uusien turbojen rallattaa jos alipainejärjestelmä toimii niin ku pitääkin.

(Just asking if he has replaced all vacuum lines)

I have previously replaced the ones that i could reach from engine bay and
when i had my turbos replaced i asked them to replace the rest that connects to turbos.

If you think it still could be vacuum related, what would be easiest way to check?
Should i change boost solenoids just incase?

[jjbmuu]

Are you sure the wastegates were adjusted properly on the turbos when they were installed originally? Sounds to me like the rods are adjusted too long or something along those lines.

[Beisofmarko]

Originally Posted by jjbmuu

Are you sure the wastegates were adjusted properly on the turbos when they were installed originally? Sounds to me like the rods are adjusted too long or something along those lines.

i asked about this before replacing them last year and the bmw claimed they come pre-adjusted.

and if i understood right, the accerlation rattle comes from front turbo?
so i cannot even try to tighten the rod 1-2 turns to see if it helps.

[arhoads335i]

here is a thread on front turbo adjusting. http://www.e90post.com/forums/showthread.php?t=890145

[Beisofmarko]

Originally Posted by arhoads335i

here is a thread on front turbo adjusting. http://www.e90post.com/forums/showthread.php?t=890145

Thanks for the link, might test this out if i can make sure its front turbo on my case.

I was doing some tests yesterday by disconnecting vacuum line from front turbo vacuum
canister and the rattle was still there on accerlation but 90% quieter.
Then i connected front line back and did same to rear turbo and same thing,
rattle still preset but 90% quieter?

So i cannot really say where rattle is coming from exactly..
Sometimes i swear that i allmost can feel the rattle "binding" in pedals or something.

Happens only in accerlation at 1800rpm and again on somewhere between 2500 and 3000 rpm.
Also rattle is really loud in driving conditions but much quieter when revving in neutral.

Leaving parking lots feels uncomfortable..
Frustrating :/

[arhoads335i]

Originally Posted by Beisofmarko

Thanks for the link, might test this out if i can make sure its front turbo on my case.

I was doing some tests yesterday by disconnecting vacuum line from front turbo vacuum
canister and the rattle was still there on accerlation but 90% quieter.
Then i connected front line back and did same to rear turbo and same thing,
rattle still preset but 90% quieter?

So i cannot really say where rattle is coming from exactly..
Sometimes i swear that i allmost can feel the rattle "binding" in pedals or something.

Happens only in accerlation at 1800rpm and again on somewhere between 2500 and 3000 rpm.
Also rattle is really loud in driving conditions but much quieter when revving in neutral.

Leaving parking lots feels uncomfortable..
Frustrating :/

Yeah I have the same thing it's bad on acceleration, but not that bad when i rev the engine in neutral. I haven't tried the front turbo adjustment yet but i did the normal rear one the other week and it didn't really help at all. Might try it this weekend, not really excited about doing it though