Air intake

will an air intake system from a 91' 240sx DOHC fit in an 89' 240sx SOHC?? wanna know cause my friend if selling it to me for 20 dollars?? will it fit?

Yep the range is 89-94 so youll be fine...what Intake is it by chance?

u sure about that? wouldn't that depend on what kind of intake you have?

usually the modifications are listed into two categories for the S13... 89-90 and 91-94... MOst parts aren't interchangeable...

Im just going off my intake:
AEM: 89-91, 92-94, 95-98
Blitz: 89-93
HKS: 89-94
Injen:89-90, 91-94, 95-96

So if its Injen It wont work...Those are the basic intakes

Aren't the Blitz and HKS ones for JDM S13s? And I'm pretty sure the AEM years are typos.

Test fit it before you buy it.

thanks for ur help guyz

hold on here one minute!!!!!! u can make your own. My uncle and i jsut made a custom k&n cool air intake bro. Its for his 02" dodge caravan. The thing is totally badass, we just got a k&n airfilter(cone) and 3" pvc pipe a crank case air runoff plug thing and sum tightner/ fasteners. The things sounds SWEETTT especially on his van its got the deep gulping air sounds. Best PROJECT YET i have done so test it. total price was only like 50 bones

You shouldn't plug the valvecover evac. hose. Run it back into the intake. The idea here is to run fresh air through the crankcase and get all that blowby out. I bet if you leave it plugged, you'll have some extra nasty oil on the next oil change.

I guess I need to scan and post a Dyno test for all Air Intakes...the K&N Intake got -0.1 TQ and +0.0HP!! WTF! no R&D what so ever!

What about venting the valve cover thing? JWT has a tiny little pop-charger for it.

I guess I need to scan and post a Dyno test for all Air Intakes...the K&N Intake got -0.1 TQ and +0.0HP!! WTF! no R&D what so ever!


Yes we all know you have the issue of Import Tuner with the RSX dyno And its about as Irrelevant as Logik23's hemmoroids. just because its not as mad JDM Ebay Tyte as Injun doesnt mean they dont have any research behind it... Look at what 90% of every racing field is using

:gay:

Look guys, intake kits do jack shit for the butt dyno. I remember putting my filtercharger on and saying "The engine is a little more responsive and its a little faster in the 3500-5500 rpm range," Truth is, there wasn't much of a difference.

Intakes, exhausts, porting, cams ect are all proportional to how much displacement you have. AKA, IHE really doesn't do jack for small displacement engines. You figure:

146cid*1728cftd=.085cftd
.085cft*5500rpm=467.5cfm
467.5cfm/2=233.5cfm
233.75cfm*.069lb/min=16.1

So 16.1lb/min is flow at 100% Volumetric Efficiency. Everyone knows that 1lb/min of airflow is approx. equal to 10hp. So the engine will generate 161bhp at 100% VE. Using trial and error, I get that the engine already has a 96% VE rate. Figure that the intake adds 4%( which is probably being leniant considering the exhaust is the biggest restriction) and the engine makes 161BHP.

Stock, you will only see about 128whp.
With the intake, you will only see about 132whp.

Nothing to spooge over.

http://www.importtuner.com/tech/0210it_powerpages/

Yea, its Import Tuner:gay::gay::gay::gay:, but a dyno is a dyno.

The idea for the valve cover vent is to draw fresh air in through it. At idle, the PCV valve has air being sucked through it. It is a check valve, so when at 22" of HG(idle) it is open sucking all of the blowby out. And it is designed to stay open and vent air out being as it is NA(IMP never goes past 0" of HG theoretically). So there is constantly fresh air going through the engine.

Now for the valve cover vent thingy, it is a bad idea to just draw in fresh air because then you have the equivalent of a vacuum leak. All the air being drawn into the IM has not been metered.

Solution: route hose from the valve cover to the intake. It gets more complicated with boosting a NA engine.

My hemmeroids? Damn...is that was those are......I hope that someday I'll be able to ride a bike again.......

All i can say fo Intakes...is this since i havent Dynoed my car before intake or after i got it on. I can say that the car used to shift into 4th at about 103MPH Full Throttle and with the intake it now shifts into 4th at about 110MPH...But overall the sound of the intake is almost worth the whole price...Its an Automatic so its pretty accurate on shifting points.

http://www.importtuner.com/tech/0210it_powerpages/

Yea, its Import Tuner:gay::gay::gay::gay:, but a dyno is a dyno.


A Dyno is a dyno but what Mono is refering to is Imports RSX intake shootout which is completley irrelevant since comparing the KA to the K20 is laughable.

Also... I highly doubt that the KA has a VE of 96%. 100% VE on an NA engine is pretty hard to acheive and a 15yr old Nissan Motor with what could hardly be considered a great head (as opposed to hondas B16 which has a mid 90s VE) IMO doesnt have the capacity for a 96% VE in stock form.

But whatever... Engines arnt my most knowledgable area.

You are correct. The KADE or E for that matter does not have a 96%VE. I just used that because its what the math came out to. And by no means is my math 100% correct. Its just for arguements sake. I was trying to say an intake won't do shit for an otherwise stock KA. Exhaust should come first IMO.

If anything, IHE will make the car sound a little better, and it'll give the person the impression that they are adding loads of power, well for those who can't afford a turbo, lol.

You are correct. The KADE or E for that matter does not have a 96%VE. I just used that because its what the math came out to. And by no means is my math 100% correct. Its just for arguements sake. I was trying to say an intake won't do shit for an otherwise stock KA.


Exhaust should come first IMO.

Fair Enough

&

True

My intake makes my engine sound better but did I "feel" the increase...Nope...but like i mentioned earlier it shifts at 110 instead of 103 now?

how does an air intake change your gear ratios?

think about what you posted. you just might be shifting at higher rpm

It just allows you to carry 4th gear a little farther( I almost typed farter.hahaha) because of a small HP increase. I bet you carry each gear a litle farther. HP falls off a little higher now. IF you raced a stock car vs a car with an intake from a 4th gear roll, at 103 the intake car would probably pull away from the stock car.