Dinan sale today.. Question regarding Underdrive

[94jedi]

My car came w/ Macht Schnell pullies so I have no reference for my car stock, but honestly, it feels much more torquey, even at lower rpms, compared to other stock m3's i've driven. Much more responsive as well. I've not noticed any negatives in daily driving and I occasionally sit in heavy traffic.

[Nazty Naze One!]

I have the AA pulley and noticed a small gain in the revs. These don't provide anything crazy but it's just a few HP

[pbonsalb]

These cars have alternator cut out under load so the gains are less than they might be. It’s really just water pump and power steering. I installed a pulley about 6 years ago as my first mod since dynos show slight gains—like 6-7 rwhp or maybe 2% rwhp gain from the reduced drag.

[philmeister4]

Originally Posted by M3AN_S65

I just had my pulley installed and cost me $525 total including labor. One thing with the Dinan pulley is that the belt is so tight that it took my mechanic hours to get it to fit. Almost thought Dinan sent the wrong belt because it was almost 1/2 inch short but he finally managed to get it in. I do feel a slight difference and thought it was worth the money. Dinan said the pulley was a healthy upgrade without risking any damages to the motor. Pulley was $305 on https://getbmwparts.com because of the 20% off deal which ends this month. If it wasn't for the sale I would've went with the Macht Schnell or Turners.

Is there a code for the discount? I added some Dinan parts to my cart but don’t see an updated price.

[CSBM5]

Originally Posted by philmeister4

Is there a code for the discount? I added some Dinan parts to my cart but don’t see an updated price.

They show the code as DINANYES.

[elvism]

I ordered the Underdrive Pulley.. Install possibility next week.

[GeorgeA]

I thought the S65 has a system that disconnects the accessories during wide open throttle. This would mean the pulley's won't be as effective. I have heard of people having problems with their electronics as well, I would stay away.

[BOOF-M3]

Originally Posted by GeorgeA

I thought the S65 has a system that disconnects the accessories during wide open throttle. This would mean the pulley's won't be as effective. I have heard of people having problems with their electronics as well, I would stay away.

Zero issues on my end with Dinan pulley. Can't speak for others. I would however be surprised if it's worth more than 2 - 3 Hp. My car came with it already. For the price of the pulley and then add labor if not doing it oneself it seems to be a losing proposition regardless of the gain.

[GeorgeA]

Originally Posted by BOOF-M3

Zero issues on my end with Dinan pulley. Can't speak for others. I would however be surprised if it's worth more than 2 - 3 Hp. My car came with it already. For the price of the pulley and then add labor if not doing it oneself it seems to be a losing proposition regardless of the gain.

Nicely said, it isn't worth the time and money. Good to hear the Dinan pulley isn't giving problems, they always design quality parts.