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Hello you all!

Nice with the new forum, hopefully everyone will find there way.

I have a question about "the airbox mod". Some people has removed there whole airbox and just put a plate with a filter on top ( se pic.) http://www.apriliaforum.com/forums/atta ... 1122587567

So I did some research, but not really found the answer I was looking for. Is this homemade or is this some of the Renegade, EVO etc stuff?
How about the hot engine air slipping in? (since the engine wants cool, oxygen rich air?) Is there a sealing between the tank and the plate?
Also thought that the higher pressure (with some speed) in the airbox was doing some good, but this is removed not having the box.

But what I do read is that the induction noice is really nice and that the mod increases midrange torque! Nice!


If this is a secure mod I will make my own plate and buy a good offroad filter and fit it tight and securely over the throttle intake...! Have I missed out something, or is this just a meaningless mod and I might just as well take up knitting instead of spending (even) more time in the garage..?!

There are basically 2 types of air box mod - the plate type, which repalces the air box completely, or the Evo kit, which loses the top half of the air box and uses the tank base, thus increasing the air box volume. Both are designed to get more air into the engine.
The plate type is sold by Renegade and has also been home made by some members (as in your link). It isn't sealed to anything so does allow in hot air from around the engine but this doesn't seem to make any great difference. It also allows you to hear the induction roar!
The Evo kit does keep out the hot air and is quieter (due to being sealed) and, in theory, retains the ram air effect. However, since the air intakes are not sealed around the frame, it's doubtful if they contribute much in real performance terms.
Both kits offer some genuine improvement in power, particularly in the mid range, and I'm sure you will find fans of both systems (I happen to use the Evo kit) so I reckon it's pay your money and take your choice - or make your own if your a bit handy.
HTH

what prices are we talking for the two systms

The Renegade kit is my personal choice but the Evo is also very good. It might come down to availability and cost?

The Renegade kit is well made and the filter is easy to maintain. But the noise it makes when you get on the throttle is highly addictive (you have been warned)

F9

I was just going to stick a K&N filter in, rather than replace the airbox - anyone done both these mods? Does the filter make much difference over standard, and does the airbox make much difference over a free-flowing filter?

Ta muchly

have a question about "the airbox mod". Some people has removed there whole airbox and just put a plate with a filter on top ( se pic.) http://www.apriliaforum.com/forums/atta ... 1122587567

So I did some research, but not really found the answer I was looking for. Is this homemade or is this some of the Renegade, EVO etc stuff?

That's not a Renegade one. Shiny though..hmm..shiny...
Rene's is Carbon Fibre

I did the cheap thing. Literally just took the top off the airbox and got a filter over the top of the throttle bodies. Same idea but doesn't look as fancy but you can't see it. Cost me about £10, deffo improves the mid range and throttle response and the noise is just superb! I might one of these days buy a proper kit but for now I'm quite happy.

HTH

Bigun

Just out of interest, do any of you inform your insurers (no I'm not one!) when you make any mods? Especially mods that could be considered to improve performance.
Reason I ask is that I just got a new standard air filter. Did consider a K &N but imagine that it would be considered a performance mod and therefore I should inform my insurers.
By the way, when I fitted my cans I considered them to be a NON performance mod as they made no claims to boost power with the baffles in but I still declared the modification.
Am I overly conscientious?

Fausto wrote:Just out of interest, do any of you inform your insurers (no I'm not one!) when you make any mods? Especially mods that could be considered to improve performance.
Reason I ask is that I just got a new standard air filter. Did consider a K &N but imagine that it would be considered a performance mod and therefore I should inform my insurers.
By the way, when I fitted my cans I considered them to be a NON performance mod as they made no claims to boost power with the baffles in but I still declared the modification.
Am I overly conscientious?

I went the whole hog and declared every mod I've made along with a photograph of my Falco to my brokers as I was getting paranoid about the dreaded "what if" factor.
Although they won't allow for my mods if the worse happens money wise, they did continue to insure me at the same premium so it was worth it for peace of mind.
Of course this might not be case with other insurance companies.

F9

Beware a performance mod is anything not fitted as standard by aprilia and increases engine power, this includes sports cans if they are illegal cans they will not like it.
It also makes sense to inform your insurer of any obvious performance upgrades, generally speaking shocks and frame upgrade parts are exceptable if legal.
Non-compliance gives them a get out if things go wrong and those smaller companies with obscure underwriters will sure use it if given the chance. In reality it takes and expert to spot changes and most engineers will turn a blind eye unless they have been given instructions to look for them.
Says my son in law who works for NU

Ps if your broker says it's ok on the telephone get it in writing.

bigun wrote:I did the cheap thing. Literally just took the top off the airbox and got a filter over the top of the throttle bodies. Same idea but doesn't look as fancy but you can't see it. Cost me about £10, deffo improves the mid range and throttle response and the noise is just superb! I might one of these days buy a proper kit but for now I'm quite happy.

HTH

Bigun

What filter did you use? I'm thinking about the same thing but the bottom of the airbox is not flat, how did you manage to get a tight seal? Additional plate? Any pictures?
Cheers

sabestian wrote:

bigun wrote:I did the cheap thing. Literally just took the top off the airbox and got a filter over the top of the throttle bodies. Same idea but doesn't look as fancy but you can't see it. Cost me about £10, deffo improves the mid range and throttle response and the noise is just superb! I might one of these days buy a proper kit but for now I'm quite happy.

HTH

Bigun

What filter did you use? I'm thinking about the same thing but the bottom of the airbox is not flat, how did you manage to get a tight seal? Additional plate? Any pictures?
Cheers

Im interested in this can Big Un confirm what was used and the seal method?

Thanks

I remember seeing someone's mod (retaining lower part of a box). He had problems leveling the bottom to get a proper seal for a filter (rene style), ended up using some kind of a builders foam...

This is the set up I'm using without any sealing to the unserside of the tank and It's been no problem so far. The foam filter sits on top of the lower part of the airbox and the ally frame holds the intake cage in place.

I've seen a replacement ally frame with a rubber skirt to provide some sealing. this would help address the hot/cold air issue. Personally I don't see the ram air effect being a biggie as it's unlikely to have any real impact unless you're approaching warp factor 10.

Did it as part of a few other mods at the same time so can't really comment on the particular benefits it gives.

Oi FP is that a cool basket or wot??

Did you build that yerself?

Out of a shoppin trolley?????