Js racing intake

[Boost Cruisin]

hey guys im interested in the theory behind the Js racing intake... ie why it is the shape it is etc..

Ive trie dlooking on the net but i cant find much, so if anyone has any ideas or links can u help me out

thanks

[hero]

its somthing about having air trapped in the center.. it trap the air in b/w so when you get back onto the throttle there is instant air...

that what ive been told

and do not get the copy.. the copy is apparently worst than stock

[ToFuBoi]

and do not get the copy.. the copy is apparently worst than stock

can i ask where u heard that from?

[SPEEDCORE]

The debate over these intakes VS a CAI will be never ending and will always turn into a shitfight.

All I ever ask is for people to use some common sense and consider underbonnet temps on a moving car, and if they prefer throttle response over higher top end gains.

To answer the original posters question:
Its supposed to work on the theory that there is a large volume of air available instantly when the throttle is snapped open. It is apparently also supposed to have a venturi effect where as the intake starts to narrow as it gets closer to the T/B and the velocity increases as a result. Whether both these things are achieved is debatable.

[BlitZ]

can i ask where u heard that from?

there are dyno graph comparisions on honda-tech..

I once posted the results somewhere too on ozhonda.com

[jdm_kid]

AEM cai is blue, J's Racing style is red ...

http://i2.photobucket.com/albums/y30/7926/dyno.jpg

BUT a modified J's Racing Intake is quite interesting ...

http://a7.cpimg.com/image/45/F1/46147397-79e2-02000180-.jpg

[hero]

interesting...

cause this link compares j's racing VS stock... 1kw over stock ITR intake..

http://www.honda-tech.com/zerothread?id=1393642

and keep on searching.. on ozhonda...
you'll find this from blitz. (extracted from honda-tech dyno plots)

one is stock VS real j's racing - J's racing gains 1kw

real j's penis VS fake penis - j's gains 1 kw.

ebay chamber is 1kw less than the fake penis..



almost all the same..
j racing penis
fake penis is almost equivalent to stock with hi flow filter
chemaber a bit shitter than the rest

[bennjamin]

i think its more so a mid range improvement (IE throttle response) than a top end number.

[VT3C]

It is apparently also supposed to have a venturi effect where as the intake starts to narrow as it gets closer to the T/B and the velocity increases as a result. Whether both these things are achieved is debatable.

getting closer here... if you have studied airflow and aerodynamics etc, you would know that this design would create turbullence under high flow conditions (full throttle) as illustrated in the top end lumpiness on that duyno chart... I didnt expect it to waver THAT much, but that's what I expected.

the low and mid range benefits from the extra capacity and throttle response may be improved.. but air flow is compromised in the top end.. it's not necesarilly about air volume, but the flow.. turbulence is bad.. you need a nice even spiralling airflow.. like when you pour water out of a 2L coke bottle.. if you shake it it 'clumps' out, if you give the water a spiralling motion it flows much better.

that whale-penis with the modified alloy bezel is very interesting however, it
MIGHT help reduce the turbulence...

without wanting to start a new intake debate as there's been 47 threads on here about that, but IMO, you need to match a diameter tubing to your needs (top end/bottom end etc) and then create an intake with the least number and degree of bends.. the shorter the better throttle response and top-end power, the longer the better low-down power at the sacrifice of throttle response and top-end..

[SPEEDCORE]

The alloy bezel thing I bet is they have tried to integrate some sort of velocity stack onto the opening of the intake. I would definately be the least qualified on ozhonda to talk about fluid dynamics but I have my doubts there would be any real gains to be had from doing this.

[jdmlvn]

http://a7.cpimg.com/image/45/F1/46147397-79e2-02000180-.jpg
that looks interesting.;)
and do u connect a snorkel to that?:confused:
post up a example.;)
that will be super gold!:thumbsup:

[egSi]

The alloy bezel thing I bet is they have tried to integrate some sort of velocity stack onto the opening of the intake. I would definately be the least qualified on ozhonda to talk about fluid dynamics but I have my doubts there would be any real gains to be had from doing this.


least qualified? damn that must make me under qualified. :p

regarding these intakes, ppl must realise thats with ANY intake the gains are LOW almost debatable. i mean how much are you really to gain? couple of hp tops? most ppl buy intakes for looks and/or sound. trust me i know, i sell them lol. dyno graphs are easily skewed as well so i wouldnt purchase an intake soley on the basis of dyno proven power. unless your in the workshop and watch the same car get dynoed with 2 different intakes with minimal time in between right there infront of you, id be weary.

I think when purchasing an aftermarket intake it should be a combination of general performance/fitment/responce/look etc.

just my 2cents tho and for the record i have an oem integra intake in my eg, i have tried allot and this is the best all round imho. :thumbsup:

[Boost Cruisin]

cool this is great thanks guys... ive just been looking at the design of different intakes for an assignment so all this information is great (altho not very credible but it is interesting nonetheless)

[supernatural]

if your looking for power gains...then j's isnt the intake u're looking at... CAI intake such as mugen, aem, injen and stock dc2r airbox will give u a better gain then SRI as we all know tat CAI sucks up cold air...and SRI sucks up the hot air... but...

Having a SRI allows the engine to suck the air easily when it needs to breathe. issue is tat it sucks hot air which can reach into the hundreds of degrees.

[quote]Hot air is less dense, and will have a lower number of oxygen molecules per cubic foot than cold air. The explosions in the combustion chamber depend on oxygen. If there is less oxygen, the explosion will be weaker and create less power.[quote]

hope tat helps... :)