MINI2 - MINI Forum - View Single Post - Can Rolling Road Power Runs Damage Your Car?

Perm · Feb 4th, 2008, 10:56 AM

I know this has been covered before but what do you all feel about this warning from BBR about rolling road testing ?

Quote taken from the BBR web site.

…..And a word of of warning, stay off power testing on rolling roads! No fan (other than a wind tunnel fan) has the ability to cool the air through the intercooler "put your hand out of a car window at 100MPH see if you can find a fan that has the same effect?" We have been advising our customers since the mid 80's (Cosworth days) to stay off power testing on rolling roads. They do more damage than you can believe, since it's impossible to keep the inlet charge temperature at a safe level! We have seen countless damaged engines all down to reckless power testing on the rolling roads! You have been warned!
Note for Cooper S pre 2005 model owners with supercharger pulley reductions:
We have noticed without exception due to the extreme heat induced on so called "power runs" on rolling roads, Cooper S owners are over heating the coat applied to the rotors within their earlier type Eaton supercharger unit. This causes delaminating and flaking away of the Eaton rotor coating, a loss of efficiency within the supercharger (loss of seal) therefore reducing boost pressure and airflow! This will cause a loss in power, but more importantly the delaminated coating has nowhere to go other than into your intercooler (further restricting air flow!) or even worse with smaller parts straight through into your engine!

BBR do not recommend these rolling road "power runs" on forced induction engines (see Brodie Report), but we would like to warn and prevent our customers, and all other Cooper S owners from unnecessary damage to their supercharger units and potential long term damage to their engines! "You have been warned."

Feb 4th, 2008, 10:56 AM	#1
Perm MINI2 Senior Join Date: Jul 2003 Location: Nottinghamshire Local Time: 03:54 PM Posts: 500 Offline	Can Rolling Road Power Runs Damage Your Car? I know this has been covered before but what do you all feel about this warning from BBR about rolling road testing ? Quote taken from the BBR web site. …..And a word of of warning, stay off power testing on rolling roads! No fan (other than a wind tunnel fan) has the ability to cool the air through the intercooler "put your hand out of a car window at 100MPH see if you can find a fan that has the same effect?" We have been advising our customers since the mid 80's (Cosworth days) to stay off power testing on rolling roads. They do more damage than you can believe, since it's impossible to keep the inlet charge temperature at a safe level! We have seen countless damaged engines all down to reckless power testing on the rolling roads! You have been warned! Note for Cooper S pre 2005 model owners with supercharger pulley reductions: We have noticed without exception due to the extreme heat induced on so called "power runs" on rolling roads, Cooper S owners are over heating the coat applied to the rotors within their earlier type Eaton supercharger unit. This causes delaminating and flaking away of the Eaton rotor coating, a loss of efficiency within the supercharger (loss of seal) therefore reducing boost pressure and airflow! This will cause a loss in power, but more importantly the delaminated coating has nowhere to go other than into your intercooler (further restricting air flow!) or even worse with smaller parts straight through into your engine! BBR do not recommend these rolling road "power runs" on forced induction engines (see Brodie Report), but we would like to warn and prevent our customers, and all other Cooper S owners from unnecessary damage to their supercharger units and potential long term damage to their engines! "You have been warned."