Aftermarket Exhaust - Impact on Fuel Economy?

mini_cal

Since my 370z is my daily, I try to keep my fuel economy reasonable I drive about 150km daily mix of highway and city (~93 miles for US folk).

I'm looking into getting an exhaust system but I'm just wondering if people have noticed much of an impact on their fuel economy? Some people have mentioned doing an intake, or intake+exhaust setup has decreased their fuel economy by a bit.

I'm not looking for intense HP gains or anything. Just trying to get something a bit more audibly pleasing than stock.

Any input? Thanks!

BC416

Your MPG will go down because you will be leaning into the throttle more to hear that sweet sweet VQ open up!

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F.I. / K&N / 180 / Forgestar

dts3

You'll be on the throttle a lot harder to hear your new exhaust, which will impact your fuel economy

FPenvy

wait...........people actually care about MPG in a Z?

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324whp/258wtq AAM Tuned |F.I. NonRes CF CBE/NonRes TestPipes #373|UpRev Tuner|Akuma Motorsports Intakes|Z1 34 Row Oil Cooler

Spooler

Noop, I sure don't and I commute 104 miles a day. I pay for smiles per gallon.

ColtronZ

The same people that care about MPG are the ones that care about paying for premium. You knew this going into the car. It's expensive but it's about the enjoyment not the price.

And an exhaust will make you even more likely to not care about MPG because then that negates the racecar.

FPenvy

i mean my drive is short only doing 30 miles round trip but still wouldnt care if it was longer.

think my Z is avg 18.3mpg and the GTR is 18.5mpg......cant help to play with the boost. it was 19.5mpg until the weather cooled down

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324whp/258wtq AAM Tuned |F.I. NonRes CF CBE/NonRes TestPipes #373|UpRev Tuner|Akuma Motorsports Intakes|Z1 34 Row Oil Cooler

somms

My MPG went up after exhaust/HFC/CAI plus ecutek tune. If I stick the cruise control on 65 and drive for a few hours the dash computer tells me I get about 29-30 mpg. Before the breather mods and tune, the best I could do was about 27 mpg on a cross country trip.

That said, you will be flooring it to hear and enjoy your car. You'll also be downshifting more often to stay out of the 2000 rpm range, unless you enjoy rattling the entire car with a loud drone.

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Fast Intentions 18 inch resonated catback, Fast Intentions resonated HFCs, Stillen Gen 3 CAI, EcuTEK tune, 311whp

SouthArk370Z

IF your driving habits remain the same, you should see a slight increase in MPG. But I'm in agreement with everyone else that your driving habits will change and MPG will drop a bit.

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mini_cal

Haha thanks for the input everyone. It's not really "paying for fuel" thats the issue, its me being lazy to go fill up more frequently and I like having good range per tank. Thankfully our Zs actually have pretty big fuel tanks.

Glad to know the exhaust doesn't directly impact it too much, just my driving habits might change to hear the sweet V6