Hi , I am wondering how muh of a difference my a/f ratio will be when running a stock exaust and haveing a cut out.

I wias thinking mabye running 2.5 pipe with a type r muffler as i want a really quiet stock soundinf exaust , but i dont want to kill my power. Hence the cut out.


any thought or tips. ( i have tunned a good aount of cars but never one on a cut out.

 

I would rather go with a greddy sp or apexi world sport instead of the type r muffler.
I have the greddy sp that is gutted with no cat d16 turbo and its quite...not raspy or anything.

 

well I decided to run a 05 mustang gt stocck muffler. They happen to bre the same muffler they use on the gt500 so it can flow well. and its 2.5 in and out. Found 2 of them for 35 buxs. Should be nice and quite and still flow well enough

 

AFR isn't all that bad. I have a 3" downpipe to 3" e-cutout. Then 2.5" exhaust all the way to a thrush turbo muffler from oreilly. E-cutout open my AFR is 11.7-12.0 while with it close AFR is at 11.3-11.6 or so. Part throttle and cruise is no difference except quiet or loud.

 

hmmm thats not to bad.

 

same setup here, make sure ur car is Tuned on OPen cut out and air cleaner off if you intend to take airfilter off compressor if you have one, when its closed afr will get bit richer, otherwise if you just add cutout ur afr might be leaner cause turbo has less backpressure and spools faster, need have tune double checked if so

but i sure love having my 3" ecut-2.5catback, dont worry about noise tickets anymore and car sounds like stock when cruizing, than open the switch and hall *** sounding like raped ape..