Dyno run question ?

[Borys]

Had a dyno run done on Friday.
After troubleshooting,cool down etc. some things pop questions.
How a dyno should be performed on mercs with 7g boxes? Reading my sheet it says gear 4 and I have a graph.
My car was remapped so was hoping for nice figures instead a bit disappointed.
ML350 blutec reads out 247bhp and get this 330ftlb on that dyno run
Should the car be run through all gears?
Also don't lough but the guy doing the run,while putting figures in asked me if my car is a v6 or a v8 :-0
I will go there to ask about the gears but would appreciate your input
Also mpg poor.Before could get 37mpg now 35mpg.Today I did exactly same run when measuring 37mpg
Frustrated a bit

 

[merc85]

I presume you are saying your vehicle is a ML350 Blutec?
What is the MB's bhp figure?
4th Gear sound about right tbh
247bhp? is this whp (at the wheels)? as its quite difficult to accuratly read Bhp (flywheel) power on a Auto

 

[daveenty]

Just been looking at my graph but it didn't mention the gear, though 4th is probably about right.

Mine gave the bhp at the wheels and a conservative estimate to convert it to the flywheel was an 18% loss, so yours would equate to around 291 at the flywheel by my reckoning.

I also got a better mpg figure than before it was mapped. Sorry.

 

[Borys]

All figures at the flywheel
Factory spec 231bhp and 398ft