RAMAIR Filters bespoke Rocket-3 underclaw filter.

[CanberraR3]

The inlets are radiused (curved) to the throttle body - as opposed to a 90º edge on K&N's - If you like it's sort of a mini bellmouth - and have a lip so air is directed to the I/D of the throttle not the O/D as per K&N
There are university papers out there that suggest this CAN add as much as 16% to air flow.

Chris

Can you explain this any better? I'm not following what you mean.

 

[ponters]

To answer some questions posed.
The filter is pre-oiled for initial fitting, obviously will need cleaning and re-oiling in service.
It is a 'lifetime' filter unless you damage it.
It does not have flame-trap gauze. In Ramair's considered opinion it is not necessary with the particular type of foam they use.

The filter wasn't conceived to make very large hp but it could very well do so - only dyno testing will tell. The whole point was to be a viable alternative to the triple RU2780's - that would flow better - that would easily fit under a standard bearclaw - that would retain the standard coolant expansion tank and have a properly located IAT sensor.

According to Ramair this filter will certainly flow more air than the RU-2780's, whether they will be sufficient for 240+ hp is not known as yet.

What filters do the high hp engines use at present? I think the Carpenter 240+ is without any filtration at all, isn't it?

Although I know a little less than not much, I do know that Lushie did say the RU-2780's wouldn't be enough for my 240+ kit. I dunno if that is helpful info or not, but....there you have it.

Whats the deal with foam filters??? When I first tuned mine I went for UNI filter foam but after reading all the fires caused by them I went K&N and kinda dont want to go for anything else. Are foam dangerous or not?

 

[CanberraR3]

I suspect a fair bit of hyperbole is being used, Anth. Best wait for Lushy's take.

 

[barbagris]

Can you explain this any better? I'm not following what you mean.

Lousy dwg - but this help?


Foam - as long as it's treated should not be an issue.

 

[CanberraR3]

Thanks for that. I see what you're saying - but 16% difference in air flow, given there is no constriction of the actual throttle body opening?

 

[bruce aussie]

Your right lousy drawing but I get the picture. The black is the throttle body and the new filter covers the end of it so it doesn't disrupt air flow.

 

[barbagris]

A pdf on bellmouths by a guy at Volvo Penta http://ubuntuone.com/6Bb1ZVT5CdNxa6hdUSPbwO

Scott read it through - I confess I pretty much just looked at the pictures.

The graphs are of empirical data - it's mind boggling! - and why Triumph fits bellmouths inside the plenum. And maybe why Carpenter uses the same but unfiltered bellmouths for their track bike.

And bear in mind that the foam filters that Wayne Tripp (some time ago) was developing had radiused inlets too - that is no coincidence.

And from RAMAIR - You asked - they replied.

Hi Chaps,

Little more info for you, the foam we use carries a FMVSS302 flame retardant standard. This is a very high standard of material specification as required by OEM’s and motorsport manufacturers for use within engine compartments. Unfortunately there are some manufacturers out there who do not conform the same material specifications.

 

[barbagris]

And finally - the relative capacities of foam vs cotton carried out by MIRA http://www.mira.co.uk/

 

[Triple Trouble]

Whats the deal with foam filters??? When I first tuned mine I went for UNI filter foam but after reading all the fires caused by them I went K&N and kinda dont want to go for anything else. Are foam dangerous or not?

I only ever heard of one instance of this happening but it seemed to really alarm people.

 

[Battersea]

I only ever heard of one instance of this happening but it seemed to really alarm people.

Would like to add that the instance you refer to was with filters that were known to be not flame retardant, so I am informed.