gaining HP AND improving fuel economy
1 - 20 of 32 Posts
I've heard mixed feelings regarding your basic i/h/e (intake/headers/exhaust.) Some people will say "yeah, my intake gave me 3-9 more miles per gallon," while others comment on how the intake "didn't hurt the gas mileage much, if at all." Using common sense, I'd think a new intake, set of headers, and exhaust would improve gas mileage. Not sure, though.
Joined
·
3,020 Posts
plugs, wires, MSD igntion setup, iceman cold air intake.
Joined
·
2,222 Posts
with the basic boltons your fuel mileage should improve a little, however once people get an intake or exhaust they usually start revving the engine harder to hear the growl, so for a lot of people their mileage goes down after getting some boltons.
Why would anyone say that gas milage would improve with I/H/E?
I don't think that's possible since you're pushing in more air, the AF ratio changes and the ECU adjusts by increasing the fuel flow so that you could burn the airfuel mixture appropriately. I could be mistaken, but I'm pretty sure you end up using more fuel.
I don't think that's possible since you're pushing in more air, the AF ratio changes and the ECU adjusts by increasing the fuel flow so that you could burn the airfuel mixture appropriately. I could be mistaken, but I'm pretty sure you end up using more fuel.
Joined
·
296 Posts
Aftermarket ignition (MSD, ICE PACK,your choice)
Spark plugs (denso Iridium, NGK, your choice)
Spark plug wires (Don't spend a shitload on wires - just upgrade from stock - wires fatter than your neck are just unnecessary)
I/H/E (again - everyone has their opinion but it really doesnt matter which brand you choose) will improve your gas mileage-There is no debate about that. When you allow your car to breath in air easier and breathe out air easier - your car will be louder because you are taking all that crap that keeps it quiet off. If you are "modded" it's human nature (at first) to drive your car more aggressively for a while... this is why people say "I thought an intake was supposed to increase your mileage? Mine went way down!?" Well, what do you expect when you are W.O.T.ing around all over the place? The sound of your engine screaming (when before it was a mime) can be addicting... hence lower gas mileage.
IN GENERAL -
easier flow into and out of the engine +
every last bit of that air/fuel mixture getting burned =
better gas mileage(less STRAIN on the engine)
Spark plugs (denso Iridium, NGK, your choice)
Spark plug wires (Don't spend a shitload on wires - just upgrade from stock - wires fatter than your neck are just unnecessary)
I/H/E (again - everyone has their opinion but it really doesnt matter which brand you choose) will improve your gas mileage-There is no debate about that. When you allow your car to breath in air easier and breathe out air easier - your car will be louder because you are taking all that crap that keeps it quiet off. If you are "modded" it's human nature (at first) to drive your car more aggressively for a while... this is why people say "I thought an intake was supposed to increase your mileage? Mine went way down!?" Well, what do you expect when you are W.O.T.ing around all over the place? The sound of your engine screaming (when before it was a mime) can be addicting... hence lower gas mileage.
IN GENERAL -
easier flow into and out of the engine +
every last bit of that air/fuel mixture getting burned =
better gas mileage(less STRAIN on the engine)
Joined
·
1,104 Posts
that sounds good to meclique said:
Joined
·
20,271 Posts
basic bolt ons always kills more gas. its common sense
Exhaust will definitely improve fuel mileage - that's all gains through efficency.
Intake shouldn't hurt or help much either way unless you drive it harder. Theoretically, it can net a mileage gain, but it would be small as efficient driving is characterized by the throttle being pretty closed.
Upgrading the ignition spark is a great idea, but is certainly out on the margins in gains, IMO.
Wide, soft tires will eat gas in a hurry, though.
Ovbiously, brake & suspension upgrades shouldn't have much impact on fuel mileage, but you will burn more trying to use them.
Basically, until you start playing with forced induction, cam timing, or fuel mapping, you shouldn't be able to hurt your efficency. (Except big tires and big wings.) Most basic bolt ons work by increasing efficency in the first place. It takes some radical ones to really dump more A/F into the engine when you don't need it.
Intake shouldn't hurt or help much either way unless you drive it harder. Theoretically, it can net a mileage gain, but it would be small as efficient driving is characterized by the throttle being pretty closed.
Upgrading the ignition spark is a great idea, but is certainly out on the margins in gains, IMO.
Wide, soft tires will eat gas in a hurry, though.
Ovbiously, brake & suspension upgrades shouldn't have much impact on fuel mileage, but you will burn more trying to use them.
Basically, until you start playing with forced induction, cam timing, or fuel mapping, you shouldn't be able to hurt your efficency. (Except big tires and big wings.) Most basic bolt ons work by increasing efficency in the first place. It takes some radical ones to really dump more A/F into the engine when you don't need it.
zombiz said:trentdx, it's not directed to you ... it is directed to all who thinks that a car w/ DOHC VTEC is or can be an economy car
well, i still not get bad gas mileage, i get over 30mpg, which i don't think is to bad for a hybrid, and that's not nursing it eather
Joined
·
286 Posts
I don't believe there is a such thing as a single cam 1.5litre non vtec engine over there. the DOHC is all that they have.zombiz said:
Better breathing helps fuel conservation but the problem is, with more power you drive harder. so obviously you'll get worse economy. If you put I/H/E and plugs and wires on a 90 year old woman's car who never went over 60mph she would have great fuel economy.
I noticed the biggest difference in fuel conservation with my 9mm wires, bosch platinum plus4's and my royal purple oil. at 80mph i was at 4K rpm, but with the ignition upgrade and the oil my cruising rpm at 80mph was lowered to 3500 which made a HUGE difference in fuel consumption. hope this helps.
zombiz said:
well, i don't agree with you on this.
the reason i bought DOHC VTEC is because in my opinion it's the best performing and economical car at the same time. give me an example of another brand that has the same HP and gas mileage. i don't want to buy a 3.0 whatever with the same HP and twice the fuel consumption.
so when i want to race, i hit the high RPM and if i want to cruise or travel for long distances i stay under 4000 RPM and i'm happy to burn so little fuel. that's what the VTEC is all about.
well i still wonder if i could burn less fuel to make me even happier, and that's why i posted this thread.
peace, Roky
1 - 20 of 32 Posts
