Trinity Autosport

We have the pulley's in stock ready to ship You can email me at joe@trinityautosport.com

Have a great weekend!

RPIpower

We have dealers all over the country and around the globe. Also, I dont know if you knew but we started off in the east coast but man, that weather is brutal.

As for dyno claims on a pulley here are some factors that can alter the "after dyno" after you install a pulley.

1. strap down on the car is not as tight as before resulting in higher hp numbers.
2. car has cooled down since baseline run
3. tire pressures are different than baseline run

Those are 3 common issues I find from other companies "testing their product". Most of it is for marketing and they dont really care about knowing the truth for themselves or their customers. When dyno testing, it all comes down to experience on the dyno and INTEGRITY.

With that, on an eddy current dyno like ours which measures hp/tq by actual resistance, the pulley hardly translates to actual engine hp. On an accelerometer like a dynojet, mustang, etc. which measures tq based on how fast your car accelerates the dyno drum (a calculation relative to your engine rpm then gives you a HP number). The pulley helps acceleration thats why you see a difference in hp with a pulley on some dynos. Most of the time, a pulley change on our dyno might show 0-5hp difference which could be from other factors. This is why I bring up the point about our customers winning races. Afterall, dont we want to beat the other guy in the other lane?

IndyRedBeast

after reading all of this i guess just to be safe its going to have to be RPI!!!!!!!!!!!!!!!!!!!!!!!!!!!!

ninjaboy

while you guys are discussing the topic, if you don't mind me asking.
what is with this pulley? they changes 2 pulleys instead of 1 that all other company uses.


Macht Schnell ? e60 M5 & e6x M6 S85 Performance Underdrive Pulleys


Free additional power to your S85 M5/M6?s rear wheels without sacrificing or compromising your BMW?s reliability.

Machined from 6061-T6 aerospace aluminum, Macht Schnell Performance Underdrive Pulleys are strong as well as lightweight to limit parasitic drag from the accessories within a moderate level for maximum performance on or off the track. After machining and engraving, pulleys are then T3 hard anodized for additional strength, anti-corrosion & wear resistance.

Our DualDrive design replaces the Crank Accessory & Power Steering Pulleys, resulting in a 18-20 HP and 16-20ft. lbs TQ gain from reduction in power required to turn accessories and an increase in accessories lifespan due to lower speed. All factory harmonics/balancing are undisturbed.

Macht Schnell Performance Underdrive Pulleys have no negative effect on accessory operation and come fully equipped with new belts.

Performance Underdrive Pulleys Features:
- DualDrive design allows maximum performance, with minor affect on accessory speed
- Proper cooling temperatures are retained at proper levels on or off the track
- Maintains proper alternator speed, allowing sustained levels to sensitive control modules
- Machined from 6061-T6 aerospace aluminum
- T3 Hard-Anodized for maximum strength and corrosion/wear resistance
- No affects to crankshaft dampening or harmonics
- Includes heavy duty fasteners
- Simple bolt-on installation

skunkd

every pulley for the m5 is a dual drive pulley... they are just using it as a marketing scheme to make theirs seem different... your stock pulley is a dual drive pulley as well...

RPIpower

Yep, that crank pulley is driving two belts. Most places will word things a certain way to make it seem better. Its the same way they word things after the copied our scoops.

John@Motorcepts

Agency Power Headers are $3K. RPi headers are $7K. Why? You get the performance, sounds, and most importantly quality. By no means am I saying Agency Power is cheap stuff but why does one cost more than the other? There's got to be a good reason right? A pulley is not just a pulley. Difference in material and location of manufactury makes a HUGE difference.

30% isn't for daily driving. If you're putting on 30%, you better know exactly what you're doing and whatever is going on.

RPIpower

Thanks John



Also, we are working on a set of headers that shares the same internals as our GT headers but doesnt give you the option of bolting on your stock cats anymore. We are aiming for this version to be in the $3500 price range. To RPi customers: Happy Hunting

ninjaboy

that brand actually gives you 2 pulley to change out instead of 1 that other company gives you. is RPI and other brand gives you 2 pieces of pulley to be changed out?

John@Motorcepts

Hurry up Eloy!!! Sign me up!!!!!! And I gotta hurry up and got the shop opened.