air filter
Turbo Mini Forums

is the k n filter rb 0700 big enough for tm running 10 psi, cheers phil

I used this cackulation...

http://www.bobsmuffler.com/filter.htm

for a 1275cc ( plus another 2/3 capacity for 10psi boost ), at 6500 RPM max.

It suggests 40 cubic inches of minimum, so if K&Ns 3.5" x 4" dimensions are for the actual filter surface area (i suspect not) then it would be borderline. On the other hand, you're not just relying on atmospheric pressure, so 10psi boost is 10psi boost regardless of the filter; The turbo would just have to try a little harder with a smaller filter.

I think it would be better to go bigger, if only so that you don't have to clean it every other month.

Given how small filters are in some n/a applications, I'd say it is more than adequate for a turbo mini install.

That said...I did clamp a filter directly onto a turbo Mini years ago. It's hot down there...the soft rubber didnt like it at all.

Plus it's a very bad spot for getting cool air.

I wouldnt want to run a filter directly on a turbo mini if the turbo is in the normal location

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Hey all... im wanting to replace the k+n filter as its probably 6/7000 miles old now and sucked in and mishaped..

Ive read on here the k+n filter is best, and to keep away from foam filters, and also to try get a turbo specific one as it will have more gauze.. well ive had a quick look but im lost already.. just wondering if anyones brought one recently or still has a link to one still available?

Cheers in advance

http://minispares.com/product/Classic/Filt...ack%20to%20shop this is what I have, running 10psi on it perfectly fine.

They don't die, they just get faster!

I have started posting on Instagram also my name on there is turbomk1golf

Nothing is impossible it just costs more and takes longer.

I use this one.

http://www.ebay.co.uk/ulk/itm/301091846567

What size have you got? I'd love it if I could get away with a smaller one!

They don't die, they just get faster!

70mm inlet. Its quite small but should be ok. I haven't done any calculations.

This one.

http://www.ebay.co.uk/itm/K-N-Universal-Ra...tUAAOSwD0lUfQ3R

Does it have the extra guaze that people have mentioned about needed for turbo use?

No idea Dave.

Why do you need extra gauze for turbo use? It's not like the turbo creates a huge vacuum on the inlet side.

Looks like the minispares one above.. its not too bad its just the fins etc.. just thought a fresh one would be best rather than try cleaning it..

The guaze thing im on about is from another thread i found when searching.. hang on ill find it..

Here it is... sprocket says about specific for turbo
http://www.turbominis.co.uk/forums/index.php?p=vt&tid=560740

Edited by D4VE on 13th Jan, 2016.

Soon find out ay :).

Mine's the same K&N as Shauna linked. Like Dave, mine has got a bit battered through multiple fittings but has also sucked the top inward during the last few months of aggressive use!

Ive got a tiny one off a Corsa. Good for 200hp, no idea how well it filters.

In the 13's at last!.. Just

Yup.. looks like that but not that much of a dip in the top haha but beat up n dirty like that

On 14th Jan, 2016 e5tus said:
Mine's the same K&N as Shauna linked. Like Dave, mine has got a bit battered through multiple fittings but has also sucked the top inward during the last few months of aggressive use!

Is that filter as filthy as it appears to be in the photo? If it can't flow air it will end up creating a depression in the filter and ducting.

Where are you mounting them - do you put shrouding around any side that directly faces the incoming air so they don't get blasted with crud?

Mines pretty much sitting on the bulkhead atm, it doesn't fit anywhere else without being in the way of something else (hence wanting a smaller one if I can) I think it's been cleaned twice in a year and a half. It's never got nowhere near as dirty as the e5tus has posted and my engine bay doesn't stay clean for long after I spent hours decruding it! I thought the whole selling point with k&n was that you clean them rather than throw them away and buy another?

They don't die, they just get faster!

Whats best to clean them with?

Mine is vertically up from the turbo between the plenum and the wiper motor.. if that makes sense?

There's kits like this for them, pretty sure euro car parts and places like that sell cleaner and oil for them too :) mines in the same place, we relocated my washer bottle to fit it there haha
http://www.demon-tweeks.co.uk/Product.do?m...OP1IaAsNt8P8HAQ

Edited by Shauna on 14th Jan, 2016.

They don't die, they just get faster!

On 14th Jan, 2016 e5tus said:
Mine's the same K&N as Shauna linked. Like Dave, mine has got a bit battered through multiple fittings but has also sucked the top inward during the last few months of aggressive use!

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

I'm having big trouble trying to get some pipe/hosing on to the turbo.. The space is way too tight to get anything to bend nicely through 90 degrees. The wastegate is making it awkward but the main problem is the bottom hose, it's fecking near on impossible... I bought some 60mm silver flexible hose but that got mangled just trying to attach it. I was thinking about something less delicate like some rubber hose but the space won't allow anything in there without it kinked/crushed slightly... Any suggestions? Sorry for the hijack...