Short Air Intake Mod Done for . . .

[SPIDER240SX]

I just thought I would share this bit of information with everyone. I am not sure who has done this but I have put in a short intake, like the one one the 240sx.org install page, into my 89 coupe. I used the same air box, with a big hole under it and the same MAF with no mods to it. All I did was connect the throttle to the intake box with a 2" rubber connector and a 45 degree pvc pipe. I move the battery to the other side of the car. It hisses and growls nicely and there is somewhat of a pickup feel. Doesn't look professional but it does the job well. It only cost me about $30. Hopefully I will get the time to take some pics, if anyone is interested.Well thanks for reading. Hopefully I can get this 92 fastback that I have been chasing so I can do some serious mods.

[quiksilvia]

pics fo sho

[singlecamhonduhkilla]

SPIDER240SX I WOULD LOVE SOME PICTURES.. I WANNA DO IT TO MY 89 COUPEJOE

[Nismo1182]

This is mine with a K&N filter, maf adapter and a cai extension from my friends 2000 Eclipse GT. Battery was moved to the trunk.

[quiksilvia]

does that spot get a good air flow?

[JJ240]

I would cut through the battery tray and pipe it down behind the bumper.

[quiksilvia]

making it kinda like the other side, then it would be more beneficial

[singlecamhonduhkilla]

HAS ANYONE DYNOED THIS IDEA? I MEAN I KNOW ITS SHORTER DISTANCE BUT ARE THERE ANY REAL GAINS?JOE

[TomsMR2]

longer pipes = more lag, less response. moving the battery, and putting the filter there is the ideal spot. CAI is a joke. you want the shortest tube, getting clean air. the battery tray definately needs to be cut out tho

[JJ240]

add 4-6 inches of pipe and the intake filter is on the other side of the battery tray and it wont get any hot air from the engine bay. It will gain more than it will lose for a meager amount of pipe added.

[robertwb70]

longer pipes = more lag, less response. moving the battery, and putting the filter there is the ideal spot. CAI is a joke. you want the shortest tube, getting clean air. the battery tray definately needs to be cut out tho

for every 10 deg change in inlet temp you get about 1% more power(which is not speed dependent)this is why all new cars draw air from outside the engine bay.ram air is good too,but requires 90mph to get 1% increase-how long do you drive over 90?

this might not seem like much but it can easily be 200deg under hood-maybe 90 outside(fla)=16.5hp for a 150hp 240sx and the torq.increases across the board.

[TomsMR2]

^ or you could route cold air to the filter, instead of putting pipe till it reaches a cold place.. long pipes lower response. that way you get the both of best worlds.

as i said, CAI intakes are a joke, getting cool air to the filter can be done in much more efficient ways than miles and miles of CAI intake piping.

[robertwb70]

however its done you do not want the engine sucking hot air-I assume your dislike is aimed at the plethora of aftermarket tubing kits marketed as CAI-they are less restrictive than stock but I prefer to do make my own because of the reasons stated above-not to mention cost and the sense of satisfaction I get from not being like every other joe schmoe(and besides having the battery in the trunk really helps clean up the engine compartment and aids in handling)

[TheDrumAndTheBass]

Has anyone ever thought about trying Nismo1182's idea and simply building a sealed air box around the filter? This way you could route in air from pretty much anyplace you wanted to. Plus with the approiately placed windows it would look quite awesome.Ryan

[robertwb70]

some of k&ns FIPKs do something like that-with a shield between the engine and the filter-woulnt be hard to do on the setup pictured above(the one in particular I saw was a mustang)

I plan on relocating the stock airbox to where the battery is and cutting a hole in it to get outside air-will be simple and still look factory too

[robertwb70]

like this

[jrc90240sx]

I have a pretty cool idea for a CAI, but i am at work so i really cant show it. I will make some good drawing, and scan them in when i get home tonight. just dont want anyone to still my idea!! jk i could really care less, plus the way i am going to make it, it would be to costly to be sold after market.

[JJ240]

I know that longer piping means worse throttle response but the extra 4 inches it would take just to turn the filter pointing down and get 1 inch of pipe on the other side of the battery tray to get the filter outside the engine bay would most definetly not hurt throttle response that much. Hell it would still be better than stock. The freakin intake runners are almost 12 inches long anyway so if you want to be a throttle response nazi you should shorten them while youre at it

[silviaNE]

If we could get some dyno numbers, this would put an end to this contraversy.

[RaVeD240sx]

Cheap CAI .....MY sep up

[RaVeD240sx]

plus the Open Air filter seat's behind the Little grill's on the 91-93 front bumper's ... it's all good

[Nismo1182]

I plan to cut the battery tray out, i have to any way to run the intercooler pipes But in the mean time, ill run an extra pipe down where the battery tray wont be.

[jrc90240sx]

Here is a ruff drawing of how i would like to set mine up. still all plans, but as soon as my engine is running good. it will get the go ahead.

Top View

Side View

Front View

I drew them up last night so they arent the best, but its a genral idea of what i want to do. i also want to try and setup a hex rifled piping made out of kevlar or carbon, as it seems like that would be the easiest way. but might not flow any better the round pipe.

[Nismo1182]

pretty good idea, i got some sheet metal and extra piping here. I'll try that out and post up the results as soon as my car is running again.

[theronin]

jrsc... is that still in the engine bay... or is it outside? im a little foggy on your idea

[jrc90240sx]

well the top view is the engine bay, not showing lower fender

side view, shows it come down to about the spot where the battery try was, and gose though into the lower fender

front shows it going though into the lower fender coming from the TB

my drawing i have are a little more detail in but i cut some of the stuff out, plus working on my car today i found that there are some placing problems, so they are not very acurite.

[TomsMR2]

remember.. its just an intake... dont kill yourself trying to get the BEST one possbile.. theres really not that much hp to gain in this area. anythings better than stock.

[singlecamhonduhkilla]

WHAT I FOUND PRETTY NEAT AT THE HIN IN HOUSTON WAS A S2000 WITH AN ARC INTAKE.. WHICH WAS BASICLY A STOCK LOOKING BOX.. BUT IT WAS CONSTRUCTED WIT METAL SQUARE BOX.. AND HAD FILTERS ON EACH SIDE OF THE BOX.. SO WOULDNT THIS BE A BETTER IDEA.. OR NO? BASICLY PULLING MORE FROM EVERY ANGLE IN BIGGER MASSES?JOE

[singlecamhonduhkilla]

OH YEA.. U CAN SEE ARC AIR BOX FOR AN SR20DE AT IMPORTFAN.COM

[JJ240]

Regardless of how much intake filter surface area and large size piping you have you can only intake as much air as your car has displacement without forced induction. So if you have piping and intakes larger than needed to flow the amount of air your engine can take in you will lose power to turbulence.