| Author | Message | ||
     Citified |
just finished de-noiding and was wondering about leaving the cover off the airbox. any insight? | ||
| Jmr1283 |
i have mine out and i did a back to back test for power (seat of the pants) and by far more with out. also i check on a dyno for the a/f so i would know it wasnt running to lean. and it was no higher then 14. thats with my a/f percent at front 100 and rear 100. try it on the highway in 2nd gear. with the air box cover out get it around 5g's and gun it, it will pull really hard and cleanly. then with it in, it will feel choked up. and will be slow in accelerating. | ||
| Citified |
sweet, just did a search too and that seems like the general consensus. | ||
| Jmr1283 |
its the difference it really easy 2nd gear wheelies and then to struggle with it in. | ||
| Zac4mac |
I've had mine out a couple of times before. Took it out again a couple of days ago. Still waiting for the AFVs to change, still at 100/100 since the reflash. She is running smother than before tho, so it's good. Hope it gets even better when the ECM adjusts/learns. I like the growl with it out. Z | ||
| Carbonbigfoot |
Here's the thing. There is a certain airspeed at which the airbox goes from negative pressure to positive. That speed is generally accepted as north of 80 MPH. Below that, you have an increase in power w/o the inner cover, and a decrease above that. Most of us can't spend a buncha time over 80, cause we don't have get our of jail free cards. The sound is another matter entirely. Just friggin awesome to my ear. Speaking purely for myself, even if it cost me a couple of ponies, I wouldn't put it back on. Just for the sound. Did I mention the bad a$$ed sound that comes out of the intake? R | ||
| Easyrider |
I did also some test on the dyno: Oke some more data, here is a graph with a stock exhaust, stock airfilter and good fuel map. And a run with the same setup, only the Airfilter removed. So the airbox can be improved.  Here is the same setup, only now I made a fuel map for the setup with no air filter BIG difference: So here is a graph with a run with NO air filter and the fuel map and stock exhaust (red line). And No air filter with a good fuel map.. (blue line) What we see is a big increase in power.  HEre is the complete article: http://www.twinmotorcycles.nl/artikelen.asp?aid=53 | ||
| Fresnobuell |
Okay Easy, you are telling us via your graphs that the stock setup will benefit power-wise from the removal of the inner airbox cover? Am I interpreting your first graph correctly that the removal of the airfilter (which we are loosely equating to removing the IAB) is giving you appx. 5 extra HP on the top end? So, we can conclude that the only benefit of the inner airbox cover is a benefit at speeds appx. 80 or higher? I am tempted to take it out for while. It can always go back on. So are you guys that have it out simply removing the airbox cover only or are there other tricks out there? (Message edited by fresnobuell on November 05, 2008) | ||
| Fresnobuell |
More questions: Do you think there is a learning curve for the AFV when taking the IAB in an out? Anyone know if k&N has come up with a filter for our bikes yet? I heard that they were developing one, but you know how that goes. | ||
| 01xjbuell |
I have the toyota (i think) K & N from a previous post. Seems to pull more cleanly. I also have the inner cover removed and front trim ring on the outer swapped out for an XB trim ring. Easy, any chance that a throttle body mounted filter would be more beneficial similar to the XB version? | ||
| Timi |
K&n filter for a Dodge Ram pickup 1994-2000 works great! Ck out my thread in 1125R area for some exhaust. THAT should free up some hp on the top end! I can't nail it between gears, wheelies and dark lines on the pavement aren't liked by the po po. | ||
| Easyrider |
01xjbuell, mmhh good question, I don't know. As long it is not a restriction to the open construction it should work, There is a lot to do these days with shorten or give throttle bodys more lenght. I did the trick with the XB and tested some stuff and it worked well, but you want to have a save solution for on the road, not a open one, who is sucking in all the dirt. | ||
| Jerseyguy |
Easy - When you say "airfilter removed" do you mean the paper element air filter or the plastic inner airbox cover? The ram air effect is, of course, not duplicated in a dyno room. | ||
| 01xjbuell |
Easy, my thoughts were two individual pod filters directly mated to both throttle bodies... i realize that by adding a filter w/ a deeper collar you would be in essence lengthening that throttle body, however if you could find a filter with a relatively short collar you could have the filtering media directly above the butterflies/throttle plate 360 degrees with no restrictive plastic upside down "bowl" on top of it. Here is just an idea from a 2 second search on K&N.com... 2 of those angled away from each other so they dont cause too much turbulence http://www.knfilters.com/search/product.aspx?Prod=SN-2530 (Message edited by 01xjbuell on November 05, 2008) | ||
| Slypiranna |
No one currently offers a clamp on that will work... The id of the filter attachment needs to be 3.75" with a max od of the lower end around 4.25"...and a 15 degree kick. An entirely new lower pan is the "easiest" method to adapt another style filter...least thats what I've found. Yes, there is power to be found in the intake. Simply removing the inner lid w/o doing anything else gives a touch more lower tq but cancels out the higher end. No afv difference noted. (Message edited by slypiranna on November 05, 2008) | ||
| Fresnobuell |
cancels out the higher end only due to lack of a ram air effect, correct? I am trying to keep my excessive speed down anyway, so this might work. Also, I have discovered the track so I don't feel the need to go FAST on the street anymore. | ||
| Slypiranna |
Fresnobuell, Yes, you are correct. Ram air is obviously gone with the inner cover removed. Not that this matters at all on a street bike. The AFV has no idea of this as its in open loop if and when forced induction occurs...thats up to the MAP sensor correction. Recent proof... One of my boys down south just ran his dedicated (stock internally/so far!) inliner 1125R in the Texas Mile/Land Speed Race. With airbox cover, 152.9929 mph with a lot of room left on the tach. W/o cover, he dropped into the 145+ range. He made 14 runs in two days. Off topic but interesting... I wish we could have had him test the CR gearing! Remember, he wasn't wound out inside the MILE! The pics he sent me were as if he was drag racing and trying to keep the front end down! There is room for improvement! His Buell 1125R was the fastest v-twin there...and there were plenty of Japanese twins running. He tried one of the aftermarket exhausts...not any difference but noise over the stocker. Go figure. | ||
| Voodoo |
So I guess I need to research the denoid or whatever the hell it is and the air box. Hhhhhhmmmmmmmm. | ||
| Bearly |
slyprianna, It would be interesting to know which one of the after market exhausts turned out to be just a noise maker? | ||
| Easyrider |
Fresno, I see my mistake in typing, I just removed te air filter and closed the airbox. I am thinking about making the air scoop in the front under the triple tree in a bigger version and then dyno the bike again to see if there is a improvement it's something I have to do at a friends dyno place who has a huge ram air blower in front of the dyno. I can make a system on my own dyno, but he has it all in his dynoroom, he is doing a lot of jap bike. | ||
| Easyrider |
Fresno, The HP is over the total range also on lower RPM in this case, if you look to the first graph. The sheets you don't see, are the sheets when I start adding fuell on the lower RPM range. The HP and torque numbers are also better then with the airfilter mounted. | ||
| Easyrider |
Jerseyguy, sorry for the type mismatch i mean paper element air filter with closed airbox. I use a percentage to add fuell on higher RPM based on what I measure on the lamda. I add this to the existing fuell that i measured. I learned this lesson from a friend who is dynoing jap bikes and who has a ram air system in his dyno room. He is doing this stuff for 25 years yet. | ||
| Easyrider |
01xjbuell, I tried this (i Think you mean this, With my XB.  It's a XB9 bored to 88CI, in the beginning of the XB's there where no systems to add fuell so i used downdraft carb, and tested a lot off stuff. | ||
| Redscuell |
Timi, I did a quick search for 'dodge' and found only this thread; give us the link regarding the Ram a/filter, pls. Since the above, I searched eBay and came up with K&N 332084 for 94-01 Dodge Ram. I expect this is the one you're referring to? (Message edited by redscuell on November 06, 2008) | ||
| Timi |
Redscull Yes, v8 5.8 and 5.2l are the same. I own one and put a kn on it years ago. When I bought my 1125, I took ALL the plastic off and I said huummm this filter looks just about like the dodge. I tried the fit, its a tad dif. But physically the same. Now the dodge runs a Buell filter, and the bike is k&n. AGAIN.. Its NOT a perfict (pun intended) fit, but it seals OK on mine. The pn on k&n I dunno, I threw away the box yrs ago, but I think u got it. Again try 1998 dodge ram 5.2l listing as this is my app. Oh, try a little storm door sealing foam apx 3/8" thick to the preimeter of the sealing area. Get the stick on type but don't stick it unless you are happy with the fit! This way, you can remove it at will and NO clean up. Good luck! | ||
| 01xjbuell |
I was thinking more like the FAST system, or this http://www.hillbilly-motors.com/html/buell_f_a_s_t .html | ||
| Xnr |
Blazin_Buell recommended this one ... K&N #33-2370 for a Toyota Camry. I tried it; it works. You need to trim the long sides and slice the top side perimeter so that it will bend. It's almost too short but it does seal. Performance is enhanced a little ... I have no dyno info. You don't give up your ram-air top end and you gain some growl. | ||
| Jmr1283 |
have u dyoed ur bike timi, how do u know ur not running to lean? | ||
| Ekruizenga |
I used the 33-2207 and cut between the pleats to allow it to bend, fits fine seemed to increase power and smooth it out. here is the original thread http://www.badweatherbikers.com/buell/messages/290 431/389633.html | ||
| Xnr |
Correction ... it was the 33-2207 I used also. | ||
| Timi |
Jmr1223, No I haven't. But after adding my own headder and muffler, rest ashured NOONE has anything AT ALL like mine!!! Its loud, rude, and agresive. And unique!! The condition of the bike is, whelie master can't even bang 2nd cause it is too crazy!! But whatever. Ill get it on some rollers soon!! B-safe!! | ||
| Carbonbigfoot |
No pics, Timi? R | ||
| Timi |
Carbonfootbig... Find my profile, email me, ill send some 2 ya! I only have a blackbery so I canot post a pic on this board. Sory. | ||
| Black_snowman |
I used the Spectere version of the 33-2370 because it was cheaper. Got it from Jegs. I slit it and it works, but took a little while for it seal up down at the bottom edges. I had to be really careful to get the sides even installing it to make sure there wasn't a gap. Ran it without the inner airbox cover at my 2nd track day at HPT. There's only 1 good straight that lets you take advantage of ram air but I still hit 132 without trouble. If your slow like me the advantage is with the cover out. |
