[SIZE=3][FONT=Times New Roman]Cooper S - Dyno test - 20 HP - where are they?[/FONT][/SIZE]
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[SIZE=3][FONT=Times New Roman]First of all hello from Poland. [/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman]For winter time in jumped in my wife’s Cooper S and left my baby /993/ in garage. From the beginning / ½ a year/ car felt slow for me. On Sunday I have last track day and I would like to go in Mini. I made dyno test today and car has 135 HP only. There is visible drop in power above 5500 revs. And when you driving is puling really nice but the re is not top end – which is visible on the graph[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman]Dyno was tested by me before with other car – is very accurate. My 993 has 285 HP and GT3 mark I 360 HP / relax guys – not mine ! [/FONT][FONT=Wingdings][FONT=Wingdings]J[/FONT][/FONT][FONT=Times New Roman]/ [/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman]Car has 20 000 miles and it’s 2003. Unfortunately I made test on regular 95 fuel. Mechanic told me that knock sensor could start some action according to low quality fuel or I have broken MAF sensor.. but there is no any…[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman]Car is just before service – I will replace filters, plugs. I will fill it with shell V power fuel and see once again..[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman]Questions:[/FONT][/SIZE]
[FONT=Times New Roman][SIZE=3]-[/SIZE] [SIZE=3]any ideas?[/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3]-[/SIZE] [SIZE=3]anybody has power graphs of standard car to compare results on lower revs?[/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3]-[/SIZE] [SIZE=3]Is anything in air box which can blocked inlet.. I heard about some flap ?[/SIZE][/FONT]
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[SIZE=3][FONT=Times New Roman]Thanks in advance[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman]Marcin[/FONT][/SIZE]

 

Welcome to NAM!

What year is the Mini?

Do the tune up as planned, and see if that helps. Might also see about getting the ECU reflashed.

 

Are you comparing the dyno numbers to the number given by MINI, or a previous dyno?

The number given by MINI is horsepower at the crank (163 or 168). Wheel horsepower is almost always lower because of driveline loss. That is a respectable number for a stock car.