Screwdriver

Will a catback with 2.5 inch piping reduce mileage? Or increase it?

I have an AEM intake as well.

Thanks

Aviv

hamhead

Shouldn't decrease it any, shouldn't increase it by any noticeable amount (least that I noticed).

Screwdriver

I've always been told that it'll do one or the other. Some people say the lack of backpressure i.e. torque leads to lower mileage.

Some say that the lower resistance means the engine has to work less harder at higher rpms, hence better mileage.

What about headers?

Peace

Aviv

hamhead

2.5inch mandrel might lead to slightly less torque at lower RPMs, but I rarely let my car go under 2300RPM in any gear, and with I/E I get around 29-30MPG all the time. I believe i got a few MPG worse before I modified it.

Mad-Machine

any modification that increases power can also increase miliage.. (except for boost) provided you can keep your foot out of the accelerator

brian01tib

and cams, basically mods like header and cai, etc take the stress off the piston when it isnt in the burning stage, so the gases can be sucked in easier and pushed out easier too

Clean2k1Shark

My Tiburon has always gotten TERRIBLE gas milage. REAL bad.

I HARDLY get 250 MPG in the city, IF THAT.

Auto tranny.

Aftermarket exhaust parts.

hamhead

^^ Someone needs a tuneup...