R56 MINI claims all Cooper S and John cooper s POP when in sport mode
#51
Old thread, but still fun nonetheless. My Triumph Bonneville with aftermarket pipes does this (jetted to my liking, but still tad a bit lean at closed throttle) and I get same feeling when I'm driving my MINI. I guess it's a brit thing.
I wonder if they'll keep this "feature" in F56, or they listen to consumer reports and kill it again. I also wonder if those new fuel injected Bonnies do this.
I wonder if they'll keep this "feature" in F56, or they listen to consumer reports and kill it again. I also wonder if those new fuel injected Bonnies do this.
#52
#53
2010 JCW Mini Cooper Hatch
I bough the car as a Certified PRe-Owned. Not sure what previous owner had done to the car.
#54
#55
#56
Found this "interesting feature" today when i tried sport mode on my almost new 2013 cooper s. At first I thought something was wrong with the ecu and the engine was running rich.
Is the mixture richer in sport mode overall or just on deceleration? Anyway to turn this off? Seriously. I prefer my engines to be tuned properly and run with proper fuel mapping. Don't need fouled plugs.
Is the mixture richer in sport mode overall or just on deceleration? Anyway to turn this off? Seriously. I prefer my engines to be tuned properly and run with proper fuel mapping. Don't need fouled plugs.
#58
#59
Childish yes. When you have a supercar it's a different story. That's real unburnt fuel being expelled. Whereas in the MINI's case, it's the ECU allowing such nonsense. Like I said, gets old fast. Either way enjoy your damn car.
#61
#62
My apologies for resurrecting this thread, but I wanted to clear up something on the popping noise that no one has mentioned.
I found this thread because I was curious about what the Sport button does on my gf's 14 Mini S. I am a car guy and also have a modified 3rd gen twin turbo RX-7 since the mid 90s, so Im pretty knowledged with fuel maps.
Many are correct with that popping is unburned fuel. Excess fuel (running rich) flows through the exhaust, is heated up, and once it hits oxygen it ignites. Im at the extreme spectrum of this with my RX-7 being that it belches out 3-4 foot flames after a hard run since I have a fully programmable ecu on it.
The reason to have excess fuel pumping through on deceleration is to prevent the engine from leaning out. If the engine leans then it could possibly ping. And pinging is bad as it can cause engine damage. Pinging is when the engine is compressing more air than having an actual combustion resulting in engine internals voilently vibrating and breaking stuff.
I have no clue if Mini is pumping more fuel to actually prevent a lean scenario or if they did it for the "cool" factor. But I did notice the hood scoop is functional since it does bring in extra air to help cool the engine down. So I figured if Mini bothered to install a functional hood scoop then perhaps the richer fuel maps are helping to prevent the engine from running lean after some fun runs. Im also surprised the brake ducts are functional. =)
I found this thread because I was curious about what the Sport button does on my gf's 14 Mini S. I am a car guy and also have a modified 3rd gen twin turbo RX-7 since the mid 90s, so Im pretty knowledged with fuel maps.
Many are correct with that popping is unburned fuel. Excess fuel (running rich) flows through the exhaust, is heated up, and once it hits oxygen it ignites. Im at the extreme spectrum of this with my RX-7 being that it belches out 3-4 foot flames after a hard run since I have a fully programmable ecu on it.
The reason to have excess fuel pumping through on deceleration is to prevent the engine from leaning out. If the engine leans then it could possibly ping. And pinging is bad as it can cause engine damage. Pinging is when the engine is compressing more air than having an actual combustion resulting in engine internals voilently vibrating and breaking stuff.
I have no clue if Mini is pumping more fuel to actually prevent a lean scenario or if they did it for the "cool" factor. But I did notice the hood scoop is functional since it does bring in extra air to help cool the engine down. So I figured if Mini bothered to install a functional hood scoop then perhaps the richer fuel maps are helping to prevent the engine from running lean after some fun runs. Im also surprised the brake ducts are functional. =)
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HAMnMINI (06-09-2020)
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