The complete automotive resource for buyers, sellers, and owners like you.
Car, Truck and SUV Forums at Roadfly
+ Bentley Forums
+ BMW Forums
+ Cadillac Forums
+ Chevrolet Forums
+ Ferrari Forums
+ Jaguar Forums
+ Lamborghini Forums
+ Lotus Forums
+ Mercedes-Benz Forums
+ Maserati Forums
+ MINI Forums
+ Porsche Forums
+ General Discussion
+ Marketplace Forums
Typically, they are a bit enthusiastic.... (archive)
[ Follow Ups ] [ 5-series (E39) Message Board ] [ Msg. Board FAQ ]
Posted by KJK on September 25, 2000 at 13:43:37:

In Reply to: Details, and corroboration. posted by JEM on September 25, 2000 at 01:59:59:


Dinan's charts appear to be crank HP numbers - I'd like to know how they arrive at these. I assume they're not actually pulling the engine from the car and running it up on a Superflow engine dyno or some such.

I'd like to see Dinan's numbers corroborated by third-party before/after wheel HP and torque numbers.

Sometime in the next couple of months I expect I'll have our 540i on a chassis dyno, that might provide some information.

even on older cars, which benefit far more from chips, they don't deliver quite what is promised. A guy dyno'd a '91 M5 and got 281hp/242 ft lbs at the rear wheels vs. 311hp/282hp crank stock. The hp could have been higher as the dyno cut off below redline. Assuming 15% loss, that equates to around 320hp and stock tque numbers. It may be higher as the car definitely pulls harder but it is barely 10%. Conditions can vary but Dinan claims 340hp if I recall correctly.


Follow Ups:


[ Follow Ups ] [ 5-series (E39) Message Board ] [ Msg. Board FAQ ]
Questions, comments, or problems, please visit the Roadfly help desk.
Roadfly.com Logo © 1997 - 2009 Jump Internet Inc. All rights reserved.