im not impressed with my new m3!!!!!!!&#33

[Greg111 13]

Just a thought Jeremy, you should really dyno 1st so you know where you ARE and then do mods so you know where you are going.

Hey just out of interest, once you have found a dyno (kind of hard in hawkesbay) how much approx does it cost?

Cheers.

[cainchapman 0]

It depends. Torque Performance used to run Performance Car Magazine days and a run was $50 for 2WD and $100 for 4WD cars.

It was purely a power run. You could pay extra to have the Air/Fuel ratio measured too.

Maybe you guys could organise a run to Palmy for a day. I'm sure there is a dyno over there, given it's proximity to a race track.

http://www.dynopack.co.nz/

Try sending them an e-mail for their closest dyno.

Edited February 2, 2008 by Cain

[Greg111 13]

It depends. Torque Performance used to run Performance Car Magazine days and a run was $50 for 2WD and $100 for 4WD cars.

It was purely a power run. You could pay extra to have the Air/Fuel ratio measured too.

Maybe you guys could organise a run to Palmy for a day. I'm sure there is a dyno over there, given it's proximity to a race track.

Hey thanks for that, will look into it, dyno tune might also be in the books.

[j_tomo 0]

right added a location (my bad)

its only got sensors before the cats and there plumbed back into the pipes

taking the intake trumpet out made a huuuuuge difference its makes most power between 4g and redline

its booked in for a check over this weekend

im not sure if it will pick anything up- theres no fault codes

ill keep you all updated

thanks for the input

jeremy

[Greg111 13]

Now what do you mean by trumpet?

[j_tomo 0]

Now what do you mean by trumpet?

take your air filter out and reach into the airbox and where the intake pipe starts theres a big elbo shaped pipe close to the side of the airbox

my e30 325i had a similar set up, very restrictive!

[Greg111 13]

Does this do any long term damage if taken off??? Am interested in trying it if it produces more power?

[Brennan 0]

http://www.bolhuijo.com/airflowtest/

go down to where it says intake horn thing. Although thats an e30 it still has the trumpet. Its interesting you would feel a positive difference, is there anything else you did at the same time? Im sure there is a reason BMW's engineers put it in there in the first place.

[drifty325i 0]

I wouldnt recommend taking out the intake trumpet,if you test it on the dyno im sure you will see negative gains from it

as i said before ^^ prove me wrong on a dyno

[mr E34 11]

as i said before ^^ prove me wrong on a dyno

I agree, may alter sound but always dyno before & after mods to check. If you get a gain i would be surprised, N/A costs money to get power!

[will 169]

I'm with Riley here, if you read other forums you will find that the standard M3 airbox seems to be pretty much optimised and people seem only to lose HP by altering or fitting (cheap?) aftermarket systems.

Will

[Andrew 30]

The stock BMW intake isn't that restrictive at all (again - tested on a dyno)

[Guest Simon*]

http://www.bolhuijo.com/airflowtest/

go down to where it says intake horn thing. Although thats an e30 it still has the trumpet. Its interesting you would feel a positive difference, is there anything else you did at the same time? Im sure there is a reason BMW's engineers put it in there in the first place.

That's awesome - fantastic DIY home air filter test with a leaf blower!

Should make anyone with a poxy pod or expensive panel sit up and take notice

[j_tomo 0]

my m3 had sat in a shed for a while

its seems that after every big trip i take it on it goes beter

i noticed quite a gain in the mid-top rev range with out the air horn

ill put it back in and see if it does anything

the closest dyno to me is a day off work and 6 hrs return journey

on my e30 325 the air horn was aprx 1" away from the side of the airbox wall

does anyone else's m3 make a high pitched wirring noise at light acceleration? (hardly noticable)

[j_tomo 0]

with the airhorn in it goes noticably beter on light throtle but more sluggish on full throtle

i went for a quick drive- reversed out the driveway forgot the dog so i drove back in and whatdoyaknow the check engine light came on and stayed on till i switched it off and on again, so know the sparkeys can find a fault!

spent 20k on a car with faults

[Greg111 13]

Might try removing it and just see what happens? When my cars back on the road again

As was said before, BMW put it there for a reason, but again i don't know why it's pointing away from the air filter, the airs got to travel further?

As for the wirring noise don't think mine makes it?

[Yuen 16]

What exactly is this 'trumpet'? Can you post a pic?

Sounds like it's there to smooth out the airflow.

[Greg111 13]

What exactly is this 'trumpet'? Can you post a pic?

Sounds like it's there to smooth out the airflow.

I would take photo of mine but not with my car at the mo, it's just connected to the intake pipe inside the air box, looks like a trumpet end (Hence the name)

[oldskool 4]

Mate,

Seems everyone is overlooking one key factor, if the vanos unit is not working as it should you will be experiencing the very symptoms you are talking about, do you have a rattle from the front end of the engine at idle and a somewhat erratic idle ?? If so you will need to have the vanos unit stripped down and order a new seal set for it, there is a part number for it, if Brent doesnt give it to you in the next five mins.....I look it up for you...........BMW will tell you it is a non servicable item and will require complete replacement, this is not the case and the guys Cain has mentioned in ChCh will be able to do the job............fiddley but not as expensive as you might think.

I test drove a Kiwi one a few years back that had a dodgy vanos unit and it was slower than my e30 m325i that was well out of tune at the time.....the vanos unit in the 3.0 is better than the twin unit in the 3.2 but it is still a known weak spot in the e36 m3's.

Will get the part number for you for the seal kit and what else may be involved in the servicing of the vanos unit....

Cheers

Grant

[m325i 705]

Like how much?

I have been quoted $10k to do the job. (not a dealer).

Are these guys just scamming?

[oldskool 4]

Like how much?

I have been quoted $10k to do the job. (not a dealer).

Are these guys just scamming?

Hey Nick,

In UK it costs around 400 - 600 pounds including kit, thats at a specialist, not bmw franchise, I will recheck figures, but even if you replaced the entire vanos system it should only be around $6k nzd. The rebuild kit fixes the problem and is a very reliable fix, it involves new seals and rings on the vanos cylinder, I will find the article and post it or fax it to you, may take a week or so as most of my uk mags are in transit from ChCh.

Hope that helps

Cheers Grant

[j_tomo 0]

that sounds like my problem

whats the seal kit worth?

if i can be suplied with a kit ill do the job myself (im a diesel mech)

thanks for your input

and it only makes a wirring noise when cold

[j_tomo 0]

update!!!!!

got my vanos unit out and stripped

all seals are hard and the orings are square

in the exhaust unit theres a serries of 5 sprung loaded pistons, seems to be and oil pump of some sort

1 of the 5 springs was broken and the bearing surface on the oil pump sleave only goes on one end, ill post a pic when i get home its hard to explain

bmw wont supply anything for inside the unit (springs seals or orings) so out comes the hitachi parts book!!!!!

does anyone know if the bently manual covers euros?

or what book does?

cheers

jeremy

Edited March 4, 2008 by j_tomo

[mr E34 11]

Are the later Vanos any better??Can you redesign the original with the help of an engineer, pretty bad design when the krauts can't make reliable technology.

Hope you have some luck in the rebuild.

Just read oldschool, seems to know kits etc.

Edited March 4, 2008 by mr E34

[allan 295]

Hi found this last week it may help.

http://www.bimmerfest.com/forums/showthrea...ghlight=Jase007