i have a 2005 mini cooper s with b&b exhaust, madness intake 15% pulley, alta bigger intercooler, evotech chip, irdium plugs, and wires and i had a 19% pulley but went down to a 15% thinking i would elminate the pinging but it still occurs around 4000 rpm and when im flooring it i also tried tolune fuel additive and other octane boosters. does anyone have this problem i have about 33,000 miles on the car

 

Long discussion found here:
https://www.northamericanmotoring.co...hlight=pinging

Jim

 

Be careful, I think mine was doing that and now my motor blew up and is costing thousands to fix.

 

Thanks for the link, jimz!! I've been noticing pinging lately, too. I think I'm gonna pick up some Seafoam tomorrow and start the process.

 

Another thing that cures pinging....
a couple gallons of 100 octane added to the tank!
Jim

 

Probably the crap they put in the winter blend of gas not helping.

You are running the highest octane you can get right?

 

Might want to rethink that chip. Is it setup for your mods? You're running a lot more air and if that chip isn't giving you enough fuel, you'll get pinging, detonation and eventually a blown engine. Much of the gas these days have been reformulated and could also contribute to that.

Good way to check whats going on is a dyno run with air/fuel readings to see how lean you are running.

could also be clogged fuel injectors. cnsider sending them to RC Engineering to have them professionally cleaned and balanced.

 

No joke here. It cures it!

 

I ping in summer, and winter...I get 91 here in AZ, but add some 100...expensive...

 

is it a ping... or is it a clicking noise?

 

that if there's pinging, it's from carbon build in the cylinders. Do the Sea Foam thing and it will be better. But the carbon comes back FAST...... So buy a bunch of cans of the stuff....

When I changed out my head, the only place on the top of the piston that wasn't covered in carbon was right under the spark plug...

Matt

 

i've heard of hydro lock happpening doing this . how is it best avoided?

 

not sure i understand your question... but if you don't want to hydrolock your motor... don't drive through deep puddles...

 

guys have accidently hydrolocked their engines by using sea foam. is there a way to meter the amount going in or is it just "slowly add" ?

 

boy is my face red

 

Larry Widmer of ENDYN promotes carbonization of the combustion chamber as a power giver. He says carbon on the piston crown and CC ceiling promote flame propagation and efficient combustion and has discovered more power in motors after run in than when new.

I’ve seen a few high mileage heads and didn’t think the valves showed any excessive signs of carbon either. I don’t know the source of the “pinging” experienced by some of you but I would look elsewhere first before suspecting carbon in the CC.

 

you're too funny . i've never done it nor have i witnessed it . so i assume you run the engine while doing this . so is it as scientific as listening to the engine and when it starts to stall a bit just ease up on the fluid before you bend a rod? or is there a more metered procejure?

 

maybe misfit toy could wade in with the benifits to water/methanol injection. years ago i had great success with just adding water at 2000 rpms. the crap that flew out the back was amazing. but like i said i've never used this stuff.

 

That's how you do it. I have also run it rich in the tank, 2-3 gallons if gas to a bottle. I don't know if it is as effective, but I did notice a difference.

 

octane related knock is dealt with pretty well by the knock sensor. But I found that the ping I experienced seemed not to be dealt with by the knock sensor, so I think it's from hot spots in the head... ie the ignition is independant of spark time.

When I had this bad, the Sea Foam trick really, really improved it. Now, it's a fair question if it was a hot spot, or the build of carbon increased the compression a bit, don't really know.

I can see the benefits of carbon in that the dirty film iss going to insulate a bit containing some heat and hence pressure, and it will increase compression ratio depending on how bad it is.

As far is it being a benefit, sure, but how much is too much? I'd say that the empirical evidence shows that the Mini runs rich enough that this is a real issue for at least some of us... How many, I have no clue. Maybe it's gas and region dependant as well.

Matt

 

I know... That's why I mentioned it.
Jim