BMW M5 Forum and M6 Forums banner

1 - 10 of 10 Posts

·
Company Representative of RPI Power
Joined
·
2,432 Posts
Discussion Starter #3
Any dyno's of these?
There have been people who have dynoed these with gains of about 10-15whp but our dyno here does not really show gains because of the type of dyno it is. The diameter and weight of these are similar to other pulleys available for the e60 and e63 so the acceleration improvement is significant.
 

·
Registered
Joined
·
2,066 Posts
The way I see it, as far as the engine is concerned there is a certain
amount of mass that it needs to crank. Reducing that mass through
lighter pulleys, driveshaft, flywheel, general weight loss, etc, allows
the engine to accelerate the total mass quicker. I don't see how this
equates to hp at the wheels but I can see how it would result in faster
acceleration. It's just like knowing that you could reduce 800lbs of
weight from the car you would accelerate faster (i.e. Z06). I don't
think that kind of thing is measurable on a dyno though. I could be
wrong. I know my way is overly simplistic and perhaps it isn't 100%
correct but it seems reasonable and helps me sleep at night.
 

·
Company Representative of RPI Power
Joined
·
2,432 Posts
Discussion Starter #7 (Edited)
The way I see it, as far as the engine is concerned there is a certain
amount of mass that it needs to crank. Reducing that mass through
lighter pulleys, driveshaft, flywheel, general weight loss, etc, allows
the engine to accelerate the total mass quicker. I don't see how this
equates to hp at the wheels but I can see how it would result in faster
acceleration. It's just like knowing that you could reduce 800lbs of
weight from the car you would accelerate faster (i.e. Z06). I don't
think that kind of thing is measurable on a dyno though. I could be
wrong. I know my way is overly simplistic and perhaps it isn't 100%
correct but it seems reasonable and helps me sleep at night.
These gains will show on an intertia dyno like Dynojet or Mustang. Since they measure hp by measuring the rate of acceleration on the dyno drum, you'll be able to see gains.

Alt, dont mind Kenny. We NEVER pressure people to buy stuff. We simply offer what we think are great products at great value. The products should speak for themselves.
 

·
Registered
Joined
·
1,535 Posts
Alt, dont mind Kenny. We NEVER pressure people to buy stuff. We simply offer what we think are great products at great value. The products should speak for themselves.
Not at all, Kenny's cool. He almost dragged me to your store this past Sat.
 

·
Registered
Joined
·
3,967 Posts
Not at all, Kenny's cool. He almost dragged me to your store this past Sat.
you got to come to the RPI Open House on Feb9. I overheard that RPI will gave away their NobleM400 to one lucky customer. Yeah, u heard it right:hihi:
 
1 - 10 of 10 Posts
Top