airbox v foam filters...Paging Jamie

[charged]

Just had my 20v BT rebuilt and its nearly ready for its dyno run, I want to run some filtration as it has some decent kit in it now.

Ive been looking at Pipercross air filters and but I'm thinking a air box will be better. At the moment I run 65mm trumpets but thing of going to 30mm long with a pipercross airbox. I'm limited on room and don't have a huge area to run a box.


Whats the go filter or airbox ?


Pic of engine bay, as you can see limited room between quads and m/c


Specifications of pipercross air filter


Pic



Specifications of Pipercross airbox


Pic

[fantapants]

hey mate

this is a link to ian g f20c ae86 build thread in engleand.



SOMEWHERE in there is a indepth discussion of the various filter setups available over there with the rally scene. One of the guys incvolved is a tuner with a few of the race team.

His recomendation was the itg that ian went with. also recomended by a motor bike guy who uses them. Both recon they are within a bees pointy of of the flow with no filter and miles ahead of k and n etc. pipercross wasa not too close second aparently.

have a hunt through that thread, and ill try and find some other links to conversations ive seen over there... they seem to take filters pretty serious

[Frak]

Those airfilters probably do work very well and filter very well BUT I have found on the dyno that enclosing the intake in an air box and using the resonant frequency of the box can give gains through out the rev range.


For example short rams used in open air lost down low, but when used in an airbox picked up 3kw at wheels below 3200rpm and no loss anywhere. I used to be a fan of open trumpets etc, for the sounds and the look, but would only run them in an airbox now.

Late last year we did some really good experimentation with ram tubes on a ZX10R Kawasaki(I know it's a bike and higher rpm) we tried all sorts of combinations of different length long, different length short, 2 long/2 short together etc etc to see the difference in power band, the biggest thing was running them in the airbox and loading the sound wave against the airbox lid etc

[Frak]

John I'd start with something 20V BT airbox volume if I were messing around

[takai]

Yeah, i would go with airbox as well, and not only due to my little incident with fuel soaked filters.

I picked up 5rwkw going from a bare trumpet setup to the fairly nasty airbox that i have now on a back to back dyno.

[Touge Boy]

Nice. 5kw's mightn't seem like much, but on a NA 1.6, every KW counts.

I reckon I might get an airbox before I have my car tuned.


Edit: Would it be better to go a "traditional" style airbox like the pipercross one, or one of those alloy plenum deals, like so...




Or it wouldnt really matter?

[takai]

Fwiw: this is why i dislike open filters:

But having fuel reversion from bad tuning is a fairly rare occurance.

This is my fairly bodgy airbox:




Quite simply a 2mm wall alloy box bent up and welded to my existing trumpets, i think in one of the pics you can still see some of the scorching marks from the fire.

[biggo]

If thats dodgy, can you make me one for my 3s please.

[takai]

Yeah, reasonably dodgy, very little thought given to actually moving the air, more thought given to containing any future flames.

Next one i want to look something like this:


Although i could toy with doing something like this:

Or this:

[charged]

Chris have you seen Rodgers intake on his Zetec....very nice air box that one