club.liberty.asn.au

Hey guys
Jst had my phat mufflers fitted last week, love the sound, really happy wit them.
but my fuel economy had gone from about 12.5l to 100km to about 16.5 to 100km..
was wondering why?? and if anyone has had this problem??
thankz

Its probably because you drive with your foot flat to the floor so you can hear the new mufflers In all seriousness, i didnt notice any hike in fuel economy when i fitted mine..

Maybe you left a bolt inside the muffler lol. In all seriousness check the bolts and flanges to make sure they are on properly. Especially check the gaskets and that a bolt is through each of the two holes (maybe one slipped and is now hanging across the air flowpath and causing heaps of restriction).

Like Woodduck I noticed SFA difference on my fuel economy; just better sound and throttle response

If anything your car should be running a bit more efficiently being more breathable and better flow. But the fact that you're 'enjoying' them means you're driving like a madman around town. Because if you don't have any other mods, you can't really hear and enjoy them unless you stomp the pedal.

teK-- wrote:Maybe you left a bolt inside the muffler lol. In all seriousness check the bolts and flanges to make sure they are on properly. Especially check the gaskets and that a bolt is through each of the two holes (maybe one slipped and is now hanging across the air flowpath and causing heaps of restriction).

Like Woodduck I noticed SFA difference on my fuel economy; just better sound and throttle response

mmm well i have checked everything bolts gaskets and they are fine, haha and no bolt inside the muffler.
its running really well so i dont see why it would be using lots of fuel..

Arith wrote:If anything your car should be running a bit more efficiently being more breathable and better flow. But the fact that you're 'enjoying' them means you're driving like a madman around town. Because if you don't have any other mods, you can't really hear and enjoy them unless you stomp the pedal.

Yeh man, but thing is i drive it the same everyday so it shouldnt be using more just cause ive got the new mufflers on..
cant figure it out??

Did you just fill up your tank recently? Perhaps got a crap batch of fuel??

Did you get the dump as well???

Brad,

Mine went from 9.4 to 10.4 after the PHAT's were fitted. I think it is a function of the right foot (subconsciously) coz it sounds better when driven harder. . It's now back to 10.

I reckon I drive worse (for economy) with the stock cans on it than with the Phats. Simply because I can hear the car reacting to my throttle inputs with the Phats but not with the stockers. At least that's the way it was for a week or so when I had swapped back

My fuel economy actually improved by .4L/km

blacknwhite wrote:Did you get the dump as well???

nah man just the mufflers..

teK-- wrote:Did you just fill up your tank recently? Perhaps got a crap batch of fuel??

Umm could of bein but ive done nearly to tanks and its still the same?? so dont think its that..

Sentinel wrote:Brad,

Mine went from 9.4 to 10.4 after the PHAT's were fitted. I think it is a function of the right foot (subconsciously) coz it sounds better when driven harder. . It's now back to 10.

mmmm big steve..
you could be rite, cant see what else it could be but i swear i havt been driving it that hard.. maybe i have not noticed.
i drive it pretty hard all the time but yeh i dunno.. so confused rite now. one thing i do kno is the gange jst keeps droppin.. sucks

libertygt wrote:... sucks

Literally! LOL.

God help you when you get the DP and center! Haha.