I run my car with 95 octane unleaded, I have the exhaust valves open all the time (f22 out) I find when im driving like a girl and i change gears that there is small backfire during gear change 6 speed manual, like a little bark burble thing but very audible.

is this something I need to be worried about? the car runs fine

 

What country are you in? Are you talking 95 AKI or 95 RON octane rating?

 

Im in South Africa we get 95 unleaded that is all I know about it. ?

 

I get the same, only when I do early upshift like a grandma I get a tiny back fire. I think its normal, it happens on my previous car too. I think it has something to do with shifting at a rpm where there is not enough torque but the engine is feeding a lot of fuel and the excess that gets dumped when you lift gets lit up by the hot exhaust.

 

Thanks for this, yes it does not happen when Im driving with authority so you are most rightly correct.

 

I had the same thing with my V8VR, always at the same corner. Discovered it happened only when I was changing down at low revs. I rather liked it, made me feel like a renegade - but I don't think the neighbors appreciated my James Dean moment.