i took my AEM cold air intake off and put my OEM intake/airbox back on
now my fuel econemy is the pits
i went from 300-350km/s per tank to around 200km/s per tank

what gives?

 

First, telling us MPG helps a lot. Second, using a more restrictive intake setup would not decrease gas mileage. If anything your MPG will increase. So unless your stock box is making your engine ingest more air than the AEM which is highly unlikely, your drop in fuel economy has nothing to do with the change of intakes.

 

My mileage went up after I put on an AEM CAI.

 

same here..i feel like getting better fuel econemy after i install ram intake..but i think u have wait few days after u install intake..so ECU can back to normal system..so wait few days see whats going on

 

did u remember to reset the ecu?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Stewie &raquo;</TD></TR><TR><TD CLASS="quote">First, telling us MPG helps a lot. Second, using a more restrictive intake setup would not decrease gas mileage. If anything your MPG will increase. So unless your stock box is making your engine ingest more air than the AEM which is highly unlikely, your drop in fuel economy has nothing to do with the change of intakes.</TD></TR></TABLE>

restrictive intakes cause mileage to go up?

so we should all use dirty filters and tape up the holes on the airbox to get amazing mpg?

I really dont understand please explain

 

um...shouldn't it be backwards?

when u have a restrictive intake system like the OEM airbox...u need to give more gas to get the throttle body to ingest more air. When u have a non restrictive intake u don't really need to floor it to get air inot the engine

dunno I always heard intakes = great mpg increases

 

reset ecu if not already...

 

put the AEM back in!

 

i have an LS engine in my CRX. it is bone stock but i put an cold air intake on it and it gets much better gas mileage with the open intake compared to when the 10 ft. of plastic tubing, resonators, and boxes were on there.

i recently got 190 miles with 5 gallons of fuel, around 38 mpg. pretty good considering i couldn't resist flooring it at least a couple times...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by njandrewg &raquo;</TD></TR><TR><TD CLASS="quote">um...shouldn't it be backwards?

when u have a restrictive intake system like the OEM airbox...u need to give more gas to get the throttle body to ingest more air. When u have a non restrictive intake u don't really need to floor it to get air inot the engine

dunno I always heard intakes = great mpg increases</TD></TR></TABLE>
correctOmundO

 

iam saying air flow is different between AEM and airbox..so it take few days to ECU got right setup for ur car..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by njandrewg &raquo;</TD></TR><TR><TD CLASS="quote">um...shouldn't it be backwards?

when u have a restrictive intake system like the OEM airbox...u need to give more gas to get the throttle body to ingest more air. When u have a non restrictive intake u don't really need to floor it to get air inot the engine

dunno I always heard intakes = great mpg increases</TD></TR></TABLE>

I'm not saying it isn't possible for mpg to increase as a result of a less restrictive air intake system. However, what your saying makes absolutely no sense. Fuel consumption is directly correlated with the amount of air ingested.

According to you reasoning, your gas mileage should increase from a turbo because you only need to open the throttle a little bit to get good power.

I suspect that the reason why most people see an increase in fuel mileage is because of a leaner fuel mixture. With a leaner fuel mixture, with less air, you make more power. With less air, you use less gas.


Modified by Stewie at 1:32 AM 9/18/2004

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlackThorN &raquo;</TD></TR><TR><TD CLASS="quote">restrictive intakes cause mileage to go up?

so we should all use dirty filters and tape up the holes on the airbox to get amazing mpg?

I really dont understand please explain</TD></TR></TABLE>

Well, do you get better gas mileage when you only open your throttle a little bit? Sure do. What does your throttle do? IT RESTRICTS AIR!!!

So to answer your question, yes you would get better gas mileage from a more restrictive intake setup. The key is you have to optimize your fuel and ignition curve for your new intake system.

If you try to do that with stock fuel trim and timing, of course your mpg will decrease.

 

I like how you guys can't help to disagree with me. The funny thing is, if you search for any of the tornado fuel system threads that came up in this forum, according to you guys, the only reason MPG increased was because it was more restrictive.

How come that doesn't apply here? So then, what makes the tornado fuel system work?

 

my experience w/ open-element intakes has always been lower MPG. It's probably due to a couple of reasons, one is that more air is coming in, which means the ECU has to inject more fuel to compensate, like Stewie was talking about. Another is because of the increased noise, the ricers in us usually like to rev it more to hear that m4d tyte intake gr0wl y0!

&lt;-- as high as 36 mpg, 400+ miles/tank with stock intake and K&N filter.

 

ricers usually don't have intakes And reason u usually get less mpg with intakes is cuz u drive more agressively afterwards

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Stewie &raquo;</TD></TR><TR><TD CLASS="quote">

According to you reasoning, your gas mileage should increase from a turbo because you only need to open the throttle a little bit to get good power.


Modified by Stewie at 1:32 AM 9/18/2004</TD></TR></TABLE> umm most stock turbo cars get GREAT gas mileage. 1.8T VW's for example

 

i reset my ecu immediately after i got the oem box on.

i did alot of driving this weekend and for some reason i squeezed 350km out of this tank.
thats right up there where it should be

i have no idea about miles per gallon, we have liters and km's and i dont know the exact conversion

 

350km is about 215 miles

 

Is it really that important to reset the ECU afterwards?

Just installed my intake a couple weeks ago...didn't even think of resetting it...I know they show how at teamintegra.net...just reset and let it take care of everything?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Cyberfire &raquo;</TD></TR><TR><TD CLASS="quote">Is it really that important to reset the ECU afterwards?

Just installed my intake a couple weeks ago...didn't even think of resetting it...I know they show how at teamintegra.net...just reset and let it take care of everything?</TD></TR></TABLE>

No, your ecu adj. your long term and short term fuel curves automatically to best of its ability.