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
Re: Dyno analysis (feel free to tell the M5 folks) (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by Tommy C. on April 03, 2000 at 23:09:44:

In Reply to: Dyno analysis (feel free to tell the M5 folks) posted by Jim C. on April 03, 2000 at 12:36:17:

: Someone's been posting this "dyno sheet" around the internet,
: so let's do some analysis and separate fact from fallacy.

: Before we go onto the power aspects, let's look at the air fuel ratios.. (this is the giveaway)..

: Either this car hasn't adapted fully, or you're going to be seeing melted Aluminium quite soon.

: Take a look at the AFR readings..

: Running 14.3:1 at WOT at 6000+ rpms..

: (not for too long)

: Now, let's go to the purported "HP maximums"

: 281 vs. 273.4??

: Now I see the numbers.. but I certainly don't see an 7.6HP difference in the actual graph.. Oh, you mean the anomaly where you dropped off the throttle.. sorry folks.. that don't count.

: (Did I mention hidden agenda?!? ;)

: Now.. 275 vs 273.4 is more "realistic".. and if I have to give up 2 HP to keep the motor together under sustained hi-speed, then such is life.

: (But I dont..)

: Although I'm betting you'd find that in a few minutes, when the car adapts the midrange out, you'd see a big difference.

: Jim C.

: PS: Oh, and the "my car blew away the other one" is completely BOGUS, as you won't even SEE the effects of 10hp in a drag race, it will be lost in the "driver differences"

: PPS: This is exactly why I tell people to find
: a dyno shop that can also EXPLAIN the results
: to you in a scientific manner. There are few
: around..

You tell'em JIMMY C!!!!!

Follow Ups:

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]
Questions, comments, or problems, please visit the Roadfly help desk. Logo © 1997 - 2018 Jump Internet Inc. All rights reserved.