16 replies to this topic

[blackbelt1990]

Evening all.

Is there measurable improvement between the S air box pictured below and a standard one?

I don't fancy drilling holes in mine as I hate the look and I fell out with my chrome K&N ages ago when it ruined my running! lol

Thanks :)

[blackbelt1990]

*

Edited by blackbelt1990, 05 March 2013 - 11:22 PM.

[Ipod]

that was a quick bump lol

I dunno about improvement, but where did you get it, as iv been looking for one :)

If you were or are local to me, we could do a test with my modded one (with holes and inner bit taken out with K&N)

[minidizzy]

The Cooper S Works cars and the Cooper S Works retro conversion kit definitely had a replacement air box. Unfortunately the brochure does not give any detail other than to say "ingenious improvements in engine breathing, gas flow, fuel delivery and exhaust emission".
It was the addition of this airbox and a new exhaust manifold that brought power up from 85 bhp on the previous kit to 90 bhp. Personally I would not alter it.

[brivinci]

I suspect it didnt do too much BUT it did get rid of the heater valve that becomes useless if you get rid of the heat shield that is over the cast manifold and slap on an LCB. It would be nice to attach a correct sized pipe to the end and get soem fresh air in from the grill perhaps.

If anyone has any specific data, that would be amazing because its one of those questions I have often thought about.

[Scoop77]

Did you change the needle when you put the K&N on to match the fuel to the air. I can't believe for a minute that drilling holes in an airbox does anything more than make induction noise.

[L400RAS]

Did you change the needle when you put the K&N on to match the fuel to the air.

We are in the injection section... no needles to change on an MPi...

[blackbelt1990]

Lol, I double posted by mistake.

I havnt actually got hold of one but, looking at the photo I posted. It's not impossible to make a similar intake tube by cutting an original one in half. As I've never seen an Si box for sale before :/

I was sceptical it would add anything from my experience with K&Ns.

I might try lopping the end off a standard box and see what happens. There's defintely more of them about!

[Ipod]

Did you change the needle when you put the K&N on to match the fuel to the air.

We are in the injection section... no needles to change on an MPi...

Wohahahahaaa

There was someone in here was gonna post a pic of the inside of the S airbox for me to show the difference

[Scoop77]

Did you change the needle when you put the K&N on to match the fuel to the air.

We are in the injection section... no needles to change on an MPi...

Whoops :)
Still nothing to be gained but noise though ;)

[shpoom23]

Sorry for delay in replying, this is the inside of S Works Airbox

Attached Files

•  P1010041.JPG   61.19K   145 downloads

[Ipod]

so my mod was nearly the same.

[brivinci]

Not having my standard box infront of me, is there any differnce on the inside? Anyone have a pictures handy of the standard unit?

Nevermind. This should work for illustration purposes. Found online.

Edited by brivinci, 22 March 2013 - 04:42 PM.

[Ipod]

That looks well rough.

hope no mice get sucked in

[brivinci]

I know, right? It was the only image I could find of the box open...in the minute and a half I looked:-) I sure hope he cleaned that thing up before putting into use.