Try NOS Octane Boost Race Formula. That is what I used and all pinging went away.

 

Same with me.

To OP, what meth setup are you thinking of using?

 

AEM kit with 1 gallon tank but I will be using a devils own check valve and nozzle. I am also using the AEM water/meth gauge failsafe system.

I am going with the devils own nozzle because the AEM kit is not designed to be installed post throttle body.

 

Many have had good luck with aquamist setup from howertonengineering.com

Might be worth checking out....

 

I have an aquamist system, 0.4mm nozzle, HFS3 controller, 1gal Howerton trunk tank, Great products and really makes pinging a non issue. after over a year of dealing with it and trying to lay off the throttle, this is a huge relief.

+1 on Howerton Kit, just give Jeff a call, he'll get you what you need. http://www.howertonengineering.net/p...TACT-INFO.html

BTW, Aquamist is race ready, they made the kits for WRC when it was legal for them to run, new race rules banned meth.

 

Couple questions for you if you don't mind.

What mix are your using? (was thinking to get the lowest temp rated wiper fluid from target or walmart that does not have glycol). How long does the mix last for normal + occasional 'spirited' driving?

 

You should find someone with a BIM-COM and figure out which knock sensor is showing counts, and how many. My guess is that it won't be very many, since these cars are great a retarding timing when there's actual pinging.

 

Don't count on the knock sensor to adjust for pinging alone. It's looking for more of a detonation. Drove my car with a data logger and watched the knock senor show an increase during pinging but it did not pull timing.

Fig. 23: Knock Sensor Scope Patterns
Courtesy of BMW OF NORTH AMERICA, INC.

Knock Sensor Fault Symptoms

 The EMS2000 will not be able to detect and correct for engine knock resulting in a "pinging" sound within the engine.

 The engine will lack power and fuel consumption will be affected.

 The knock strategy ensures that the engine defaults to a safe ignition value.

 

A faulty MAP sensor _may_ cause similar problems, but I agree that if you put 100 octane in that should quickly help narrow it down.

If the MAP is only slightly wearing out (i.e. absolute pressure is off by 10%) you may not set a code, but it _could_ affect how the ECU calculates predicted airflow (the ECU uses predicted airflow to calculate transitory fueling requirements, in addition to real measured airflow for steady state). Also the ECU adapts the MAP sensors & tries to recalibrate for a brief period after shutdown, where it maintains power to the ECU for up to 5 minutes. This is also to try & maintain accurate fueling as the sensors age.

Regarding "Knock Retard" in the ECU... BMW doesn't have the ECU tuned to retard light knock. They completely disabled retard for "light knock". I have enabled this in my ECU. It only helps a little, but I wanted to eliminate light spark knock as much as possible. Also I don't feel that BMW has the transitory retard programmed for enough retard for modified Mini's. Especially ones with pulleys and modified bypass valves, where it slams into full boost faster.

Some Mini's also have a 3k flat spot. This IS in the software (the factory messed up the tune here folks)... if you're pinging around this flat spot zone, it's possible you have a severe lean spot, that is very high Q in nature and won't even show up on a WBO2, and certainly wont with the factory narrow band O2. I eliminated the factory glitch in mine & it improved mid band response tremendously.

 

those look nice but a little overkill for me.

I am using the AEM kit with a devil's own nozzle/check valve set up. Since I work for an AEM distributor I get an insane discount on AEM stuff. I am also using their failsafe system.

 

I had the same problem with my 2002 MCS. Inspected the spark plugs and #4 had signs of running hot (lean). I replaced the injector (as well as the seals on #1-3) and problem is all but gone.

 

Im sitting just shy of 260 whp and I has no ping... ping makes me sad and its sooo bad for your car.


What part of the country do you live in? If its any where near orlando let me know, we can bring it to mini nirvana.

 

Hey man, I know it's been awhile since anyone has been active on this post but I was wondering on the current status of your pinging. Did you figure out the cause of the problem?

I have an 05 MCS with NGK iridium plugs, 15% alta, and a milltek catback. Very similar to your set-up (or what you had when you originally posted). I took mine to a dealer to fix a belt issue and check out the pinging. They did the usual and common treatment of checking the plugs, plug gaps, and coil #3, which was slightly dirty. As did you, I did my countless hours of research to confirm that the daily driver set-up that I have would be safe and not problematic. However, this ping still has me confused. I've had the pully on since 9/2013. It didn't ping at first but began to two months later in november. Took it to the dealer in december so its been 4 months now where I've had to baby it. I'm thinking my next steps are to purchase a coil pack, plug wires, and/or a FPR. Any thoughts or suggestions?

 

I did everything you want to try and still no help. Tuned ecu and it minimized it a little. Only fix has been to run NOS octane boost. I did...

Tune, jcw plugs, jcw injectors, coil, wires, FPR, fuel filter, map sensor...you name it I did it.

 

Are you sure its not just tensioner rattle your hearing? Did you go to the JCW belt when you changed the pulley?

 

It's nor the tensioner or the belt. When I took it the Mini dealer in Iowa(not saying much) they made sure that the belt and tensioner stop was on correctly. I did not get a JCW belt, my coop is just an S.