The Carbon Chamber--Affect on MPG

SAYTIN · Jul 8, 2008

jetrinka said:
I seriously doubt you are losing any significant amount of fuel if any at all. Any kinda of fuel being lost would be vapors afterall. Chances are the fuel sensor is just getting different readings in the morning than the afternoon due to changes in temperature and other things. If you really were on top of your gas mileage and knew how much you should be getting per gallon and such and fill up and find a descrepancy then that would tell you something. Like people stealing gas from you. Gas gauges are NEVER accurate.

I second that. Especially about the temperature difference and that gas guages are never accurate. The resistance in the fuel sending unit is highly sensitive to temperature.

The carbon trap mentioned earlier is to catch and stop any residual gas (evap emissions) from exiting the intake system when the car is turned off (due to the last little shot of unburnt fuel when ignition is cut out)....

NemesisEnforcer · Jul 8, 2008

see what i mean by the kink tho? could that be bad for mileage?
i will indeed try that thing tomorrow. i doubt it will sea up right, or fit but i hope it will work. i hate that kink there.

BeeFzX3 · Jul 8, 2008

I don't think it's very important, but that is part of EGR system. As I understand it's there to make car more environmentally friendly.
It could effect A/F ratio since computer would think it gets it's extra fuel and sucks more air than needed or something like that .

pistolgripbmx · Jul 8, 2008

what is that red thing you got on there?

Egz · Jul 8, 2008

That tube is the crankcase vent. Its just taking oil vapors, and burning them in the engine. A small kink won't hurt anything, just as long as its not pinched fully shut.

NemesisEnforcer · Jul 8, 2008

okay good. i am still gonna try the stock boot tonight, see if that works. id like to get my battery cover back on too. the tube doesnt reach at all if the cover is on.

pistolgripbmx · Jul 8, 2008

That's weird, I didn't have any problems with that tube reaching mine.

NemesisEnforcer · Jul 8, 2008

yeah, well mine does, as you can see in the pic. i dont get why, but it does. really annoyed me when i hooked it up. i am gonna try that stock tube idea tonight, just cap the FS hole.

if that doesnt work ill just put my stock top box back on. it's plastic and resists the heat better anyways. keeps the cold air coming in COLD!

pistolgripbmx · Jul 8, 2008

here is a picture of how mine is, did you get that rubber peice with the intake? it's how mine came from focus sport. maybe you could try somthing like that.

SAYTIN · Jul 9, 2008

Good picture. I think there are two options.

1. Get a stainless steel spring just bigger than the inner diameter of the tube that is kinking (to prevent it from collapsing on itself).... and shove it inside the tube.

2. Buy 3 inches of rubber hose and a couple clamps, and you are good to go like the picture above of pistolgripbmx's set-up.

NemesisEnforcer · Jul 9, 2008

pistolgripbmx said:
here is a picture of how mine is, did you get that rubber peice with the intake? it's how mine came from focus sport. maybe you could try somthing like that.

A-HA!! NOWWWWW I GET MY ISSUE!!! no, i did NOT get that rubber piece! That would explain why i have the problem i have. I would have done that myself, but i didnt know that you could take that plastic snorkel out of the stock boot! well, now i know i have that option, but here is what i did tonight:

I used the FS coupler as a spacer. it actually was really snug, and then i tightened it down even more. as you can see, no more kink! i capped the FS hole. i will run this for now, least til the wkd. if it works well, i will leave it. if not, i will do that aforementioned option. what do you guys think?

BeeFzX3 · Jul 9, 2008

doesn't blue part cover the hole in the black one?

NemesisEnforcer · Jul 9, 2008

no, the blue part is moved back to just b4 the end of the pipe itself. The pipe is in further. either way, i think i will do the hose thing instead, just to be sure!

this hose should add to mpg though, right? since it recycles combustion by products right?

warneej · Jul 9, 2008

no it just balances out the top and bottom pressures, it it were clogged you would probably have a rougher idle

does not have anything to do with mpg in a noticeable way

NemesisEnforcer · Jul 10, 2008

well, i changed it tonight...got a piece of heater hose and set it up like it was supposed to be. now, has anyone ever considered using the stock carbon chamber instead of the top pipe of a cai? just cuz it will keep the air colder than a metal top pipe. u ever feel it after a long ride? that is mad hot! that air cant be cold when its going into the car, u know?

NemesisEnforcer · Jul 11, 2008

alright guys....behold what i have done. yes, that is header wrap. yes, it is a perfect insulator from heat. yes, i thought of it today, while thinking...if my wrap keeps the under hood temps down....why not keep it from getting to my incoming cold air?? yes, i am going to add more, i ran out. yes, i am a genius. yes, you may all admit this. [histerical] then you must all tell me what you think.

pistolgripbmx · Jul 11, 2008

I'm pretty sure the header wrap is made to keep the heat IN the header and not let it escape to the engine bay.
Don't know how it would react to much lower temps tho.

pistolgripbmx · Jul 11, 2008

Also, when you grab the intake are you doing it after you've turned the car off or while the car is still running? I've noticed on a few car once you turn the car off the intake is somewhat hot, but with it still running the air is being drawn in, it cools the metal off. Try it next time you drive for a while and see if that changes anything.

Mattalicious · Jul 11, 2008

We had a discussion about this quite a while back, Nemesis.
Remember how I was sent the wrong Intake courtesy of FocusSport, and they wouldn't pay for shipping for their error?

I ended up re-using the stock piece that connects to the manifold, and plugging the open pipe. Works like a charm.

It caused it to be somewhat off-center, which really bothered me thanks to some stupid OCD, but I got over it. Also, if you don't have fogs, which I'm not sure if you do or not, taking the fog-light cover off actually dramatically increases the amount of air getting to your intake. I actually noticed quite the difference when I did this.

The picture above is with the CAI somewhat off-center, as I was explaining. I've since re-bolted it and it's sitting right in the opening, which is even better.
I'd take a picture, but I wrecked my Focus on Monday night. I was going to post a thread on it, but I ended up having it towed to an Auto-Body shop before I got the chance to take any pictures.
It's amazing how much the temperature outside affects performance with one of these on. I'll drive around during the day and my car will feel almost stock. Come night time, the thing hauls(Hauled) ass.
Hope this helps, maybe.

Egz · Jul 11, 2008

Header wrap on a CAI is redundant. Air velocity through the tube is fast enough that it won't heat up that much. The reason a SRI is prone to heat soak is because it draws hot air from the engine bay; not because the tube gets warm.

The Carbon Chamber--Affect on MPG

SAYTIN

NemesisEnforcer

BeeFzX3

pistolgripbmx

Egz

NemesisEnforcer

pistolgripbmx

NemesisEnforcer

pistolgripbmx

SAYTIN

NemesisEnforcer

BeeFzX3

NemesisEnforcer

warneej

NemesisEnforcer

NemesisEnforcer

pistolgripbmx

pistolgripbmx

Mattalicious

Egz

Top Contributors this Month

Recommended Communities