ouverture papillons

[arnaud14 0]

salut , 
je pense avoir un petit problème de réglage des papillons,ouvert à fond,ils ne sont pas à l'horizontal.Normal ou je doit régler la butée d'ouverture ?

[antonio jean 0]

ja mon avis ils doivent etres completement ouvert afin d avoir une admission d air optimal
il suffit de proceder au reglage de la butee

[Kiko 0]

This quite common but quite easy to fix by adjusting the stop screw.

Are they opening too much, past the horizontal position or not opening enough?

This is bigger problem if they are not opening enough to trigger the WOT (Wide Open Throttle) with the TPS (Throttle position sensor)

On stsndard cars the TPS senses IDLE/CRUISE/WOT. The WOT position triggers the ECU to come up with richer fuel mixtures when compared to CRUISE map which is important in prolonged highway under full throttle. A lean cruise mixture could lead to piston crown overheating.

[arnaud14 0]

They are opening too much, past the horizontal position 
I went to BMW, they tell me that it is normal to direct the air flow to the cylinder head intake leads.
can someone confirm

[Kiko 0]

Yes, in theory an in race engines there are a few hp to won by adjusting a few degrees but in your case you need to access the situation by referring to my previous post....

[arnaud14 0]

ok, so I have to adjust the horizontal position
thank you

[arnaud14 0]

ok , j'ai trouvé ça , 21.7 mm et on tombe en position horizontal .
 
http://m3guru.bmwe30m3.net/wp-content/gallery/FuelSystem/13-fuel_system_img_54.jpg