Hello,

I have a 16% pulley, m7 intake, and colder plugs.

I recently got a Flo Pro V Force muffler installed. Previous to that, I just had one of those JDM can mufflers.

On my way home while steeping on it, I noticed around 130kph my mini bogs a bit like it's thirsty for fuel(fuel cutting out). This has never happened before with the previous muffler.

I was wondering if I need a tune, or if there is too much back pressure due to the small muffler.

Does anyone have any ideas?

 

Well...if you think about it...maybe your new muffler/exhaust breaths better than you previous system.
IF...you were on the lean side before at higher rpm's, your fuel maps might well be even leaner now...right ? So...it's no wonder your engine doesn't feel good !

One obvious way to see what exactly is happening, get under the car, swap the previous exhaust system back in...see what happens..!

Not that difficult to figure.

Mike

 

Or is it starving for fuel and need bigger injectors ?

 

Reset adaptations, try again and keep and eye out on fuel trims. I dont necessarily think the muffler is related to the issues, but probably something MAP/crank sensor or fuel (pressure) related.

 

Guessing the Flo Pro V Force muffler is not designed for a MINI, and from the sounds of it you have effectively reduced back pressure to about 0.
The Mk1 R53 is not turbo charged....

 

Zero back pressure IS...a good thing, if...you can attain it. Adding most any length of tubing and most any sort of muffler will most likely put "some" amount of back pressure into the system. A 3" diameter exhaust system might hurt the low rpm a bit, but would be good at higher rpm. There will always be a trade off, rpm vs. tube size vs power.
Anyone who thinks otherwise needs to do some more learnen.

Mike

 

You should go back to school.....you apparently know just enough to be reckless with your advice.

Good luck with that theory.

 

Hello all. Thanks for all the tips. You should get a laugh at this ..

turns out it was my traction control coming on and off. I just realized that if they traction control light is on it means the traction control is off. Hahah.

very rainy day when it was happening. car pulls fantastic now.

thank you everyone.

 

Hahah

Praise the motorlords that it wasnt an expensive fix!