How can I do this?

Information on the naturally-aspirated KA24E and KA24DE engines.
Kenrik
Posts: 5736
Joined: Wed Apr 27, 2005 10:01 am
Car: Nissan 240SX Coupe
Infiniti G35 Coupe
Nissan Versa Hatch

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Eell my intake really sucks! (lol no pun intended) I am going to be adding a new one bacause right now i'm just running stock (with tape on it to seal the holes..) and a cone filter. I was out at my car today and I noticed that I had an extra MAF for my car, when I saw it I was like hey.. Dual intakes! would it help preformance at all? How would I hook up the extra MAF? would I need to chip the ECU for it to work?


DjPantsSpecR
Posts: 1711
Joined: Fri Jan 14, 2005 12:49 pm
Car: 93 Nissan MS13
92 Nissan RMS13

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Ha, you're nuts dude. no, thats kinda ridiculous actually. i'm sure you are aware that you can even pick up a dual air filter off of ebay, it just feeds into one monster pipe. Two mafs, that sounds very ridiculous and very useless.

you are gonna have to siamese the intake pipe anyway, there is no reason not to siamese it before it hits the MAF

and no, it probably won't do a damn thing except look like two massive filters, although they do look good on 13B's. But, if you are a badass and rig up two intakes of two very different lengths you may be able to draw through them seperately at different RPMs, almost useless but it might make the power band a little beefier

maybe if you wanna get even simpler with this concept make a long cold air intake, and then get an ebay water by-pass valve. its just like a coupler, but the side of it is an air filter. if your filter were ever submerged it would only draw from this bypass valve. additionally it should exhibit the same trait as putting an air filter further up stream. Put it kinda real close to the throttle body and you just might get some better high rpm breathing. however, with out actually trying this, i'm sure the horsepower gain is negligable. But its only 10 bucks, plus you can make a ridiculous cold air intake, i say do it to it, and tell me what goes down

Kenrik
Posts: 5736
Joined: Wed Apr 27, 2005 10:01 am
Car: Nissan 240SX Coupe
Infiniti G35 Coupe
Nissan Versa Hatch

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Well what I was thinking was to have it draw air from over where the battery is (move it into the trunk) as well as where it usually does, now that I think about it... it does seem kinda stupid .. why even bother with a pipe I could just hook a filter upto the throttle body and be done with it.. (Sarcastic)

I am going to pipe the filter down into that front bumper compartment anyway, and have some type of plastic bin bolted in there so if I go through a uber deep puddle it does not suck up water. Do those Ebay bypass things actually work? to me it looked like it would rob HP... Plus it's ebay... home of crappy useless parts!! BTW I have a great electric turbo to sell you!! it pushes 2.1 PSI!!! (Sarcastic)

DjPantsSpecR
Posts: 1711
Joined: Fri Jan 14, 2005 12:49 pm
Car: 93 Nissan MS13
92 Nissan RMS13

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lol, no the air bypass valve is just a knock off of the uber-expensive aem bypass valve. its literally just (to way over-simplify it) a little air filter/pipe coupler. i really can't see it robbing any horse power....

wait, after having a drink i now realize to pull this little doozy off, and why i'm bitching at another guy in a different thread, you will suck in a gain of unmetered air if you put this behind the MAF. you would have to put the MAF really really close to the throttle body. i'm certain this isn't a good idea because ive never ever seen a MAF this close to a throttle body on an OEM set up. I don't know why its not a good idea, but i'm pretty sure its not, probably because its a big restriction/turbulance maker right by the intake plenum. Who know's maybe its not and someone should try it, i would but i'm broke.

i kinda like your idea, have one much longer intake right by the one right by the battery side. it would be almost useless, but it would look pretty tits... maybe if it were designed well it might be useful, who knows.

I'm not far enough along in school to know if at low R's it would pull mainly from the long one, and then gradually transfer to the short one at high R's... but it would definately help produce a ridiculously flat torque curve if it did...

i wanna talk about this and the air bypass valve idea more

Kenrik
Posts: 5736
Joined: Wed Apr 27, 2005 10:01 am
Car: Nissan 240SX Coupe
Infiniti G35 Coupe
Nissan Versa Hatch

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It might work... it might not.. it was confusing me to... Where are the really smart guys that can come along and tell me i'm wrong!! lol..

I found this website it's talking about the actual manifold but it's the same idea http://www.autozine.org/techni...2.htm

Long for Low speed, short for High speed... and if I could run dual MAFs all the air would be accounted for... it's an idea...

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s13satch
Posts: 180
Joined: Thu Sep 15, 2005 9:39 am
Car: 1991 240sx

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Anything is possible. But I'm not sure what would be done with the ecu. When putting on a larger MAF sensor the ecu just needs to be told what the corresponding cfm to voltage range is of the new unit. I have no idea how you would program an ecu to read 2 MAF sensors. I guess they would have to be wired in series so that the ecu would still only get one signal. But then you would be limited by the same voltage range of the original circuit, so I'm not sure that the mafs together could accurately read beyond the cfm range of just the single mafs. They could flow twice as much, but they could only read the same amount.

I'm guessing there would be a way around all of that, but without sitting down and really thinking about it and looking at the wiring diagram I can't provide you a working solution.

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sunnys14
Posts: 1600
Joined: Sun Dec 05, 2004 8:59 pm
Car: S14

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Kenrik wrote:Plus it's ebay... home of crappy useless parts!!
dont hate on EBAY, they have alot of low-priced good parts.


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