15 replies to this topic

[marcsrustymini]

Hi Guys,

I need a little technical help with my Mini's air intake.

Im currently running a K&N induction kit on my 1993 1275 Mini Mayfair (Carb) But im slightly confused.

The whole point of the induction kit is to get the maximum amount of cold air to the engine as quickly as possible. Although the surface area on the K&N is big enough to allow more air in, the air must pass over a hot engine. And to make matters worse there is no direct feed pipe from the front of the car like most modern vehicles i have worked on. I cant see how this can work, the K&N is at the back of the car, it gets warm air with no direct feed? If its all down to filter quality why not just use the K&N filter that goes in the standard box?

So here is where i need advice...... Im currently rebuilding my mini and making a few changes (for the better i hope). I have thought about making a ram pipe from the front grille which will then attach to the inlet of the standard air box, with a K&N uprated filter inside. This should mean the air box recieves a direct feed of cold air, similar to these forced induction kits you can buy for other cars.

Pointess or good idea..... Let me know

Thanks

[marcsrustymini]

Any ideas guys - There are so many people using K&N kits surley someone must be able go give me a little advice?

Thanks

[91neon]

i seem to remember reading somewhere that in various temps at any speed above rolling the temp at the back is no different to the front, i know they say that propping the bonnet up at the back is pointless for improving performance for this reason so therefor i reckon that despite looking good a ram pipe mite be flawed

[Ethel]

The whole engine compartment is one massive air box.

[minivan2007]

id buy a k&n stub stack only £7 from minispares makes a great sound aswell as geting more air in

[Bungle]

the flexy pipe's of a induction kit do nothing to cool the air at the carb

[Pooky]

The Mini is like one of those basking sharks. At anything more than crawling speeds the grille is scooping up large amounts of air that fill the whole engine bay with nice cool air

We've just saved you £20

As for the filtration, some people have said that a K&n element in the original filter box with a few extra holes drilled into it offers best performance (probably slightly cheaper mod too), I however prefer the looks of a nice cone filter and have the advantage of being able to use a stubstack so am willing to sacrifice 2bhp for that

[marcsrustymini]

Thanks Guys, Silly question though........... Whats a stub stack?

[mike.]

A small smooth radius around the throat of the carb, inside the filter. It helps air flow better into the carb compared to just a sharp straight edge.

[Bungle]

or i would of described it as a little ram pipe that fits inside the filter

[marcsrustymini]

Any links or pictures so i know what im looking for?

Thanks again

[Bungle]

clicky link

[marcsrustymini]

clicky link

Link took me me mini spares, but didnt show anything?

[Bungle]

try this

[marcsrustymini]

try this

Ah Thanks - Im trying to imagine how this works.