Join Date: Sep 2010
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Re: Intake adds better fuel economy?
its all good info but if you dont look at the whole picture then your not getting the best idea of whats going on.
keep in mind everything youve just read above and think about this.
at part throttle ( where most people drive ) you will have less restriction on the air coming into the engine, so your engine will work less to get the same result. the new filter will flow more freely, so your engine will work less to get more.
now in past cars ive owned, some of the intakes have been too small for the car i.e. 95 trans am. the stock intake was a bottleneck for a 5.0l engine at 3k rpms, it was on a 5.7l motor that spun to 5700. i saw massive gains throughout the rpm band just by swapping to a larger intake.
most new cars are not like this.
on my cobalt, i swapped out to a 3in intake. the check engine light came on and my gas milage went down. the maf started to read way more volume and couldnt compensate for it. we scaled the maf frequency and the gas milage went way up. didnt see much in hp but the engine loved the change.
now on top of air flowing more freely into the engine, you can gain hp and milage by the engine not compensating for the air coming in and leaning out the mixture, not highly likely but could happen. i say all this because every car is different, every manufacturer is different, the aftermarket will make some things that work and some that dont. hopefully some pioneers on here will figure it all out.
o ya just for thought, my cobalt gets a hair over 44mpg on the highway and makes just under 360whp. kind of a fun mix, but doesnt do this at the same time. hoping to run low 12's this season with it