| Author | Message | ||
     Lastonetherebuys |
what are the bonuses to riding with out the inner airbox cover? Also what are the downsides to this? | ||
| Spectrum |
Benefit - 1 or 2 hp increase in the mid range(dyno verified) and sweet WOT sound. Downside - Loss of Ram Air effect and decrease in top end and horsepower at speed. Not worth it in my opinion. | ||
| Lastonetherebuys |
less top hp must mean less top speed no? so not worth it except at a drag track where its won in the acceleration | ||
| Carbonbigfoot |
Depends on how you ride. 90% of my riding is at less than 65-70 mph, so the added stomp in the bottom/middle of the rev range is good for me. If you spend a lot of time at highway speeds plus (giggle), then you will feel the difference without it. WFORey ran his at the Texas Mile back to back with and without, and at really high speeds it makes a significant difference, but at less than 60-70 you actually have more. Like I said, it just depends. Cool thing is it takes about 10 minutes to take it off, and the same to reinstall it. Oh, yeah. I forgot. The intake noise. Wwwwowww. mine sounds like it's going to suck you into the throttle bodies. For me, intoxicating. TRY IT! R (Message edited by carbonbigfoot on August 31, 2009) | ||
| Bigblock |
Removal of the inner cover made my bike about 4 tenths quicker and 3 to 4 mph faster in the 1/4 mile, averaged over about a 1/2 dozen runs w/ and w/out the cover. CA bike, latest flash. Might help top speed to keep it on, I only use a bit of 4th gear going through the traps. And apparently, I seem to have one of the slower bikes tested here. Might be the rider...  | ||
| Bigblock |
With the ORIGINAL flash, removal of the cover gave me about a 5mpg increase, as well as making the bike FEEL stronger. With the new flash, there is no difference in mpg as far as I can tell. | ||
| Zac4mac |
Removing the inner box will cause the IAT sensor to read high since almost no air flows thru the snorkel in that set-up. It will make you run richer. I prefer to fatten the fuel mix in a different fashion that I have more control over. Z | ||
| Badlionsfan |
I took my cover off for a few rides this spring, and to me the bike felt kinda sluggish. Sounded cool, but the loss of throttle response helped me decide to put it back. | ||
| Fresnobuell |
I have been riding with the cover off for a great while. I haven't made up my mind if I like it on or off. I read an article recently about airbox pressure and it made me want to put it back on. | ||
| Doctorneon |
I also couldn't decide so I cut mine in- half getting the best of both, I left the front half on and I'm going to compare it with the back half, I'll let you know. I sure hope I shouldn't have cut it front to back, I'm kind of worried about that.  | ||
| Fresnobuell |
I also couldn't decide so I cut mine in- half getting the best of both, I left the front half on and I'm going to compare it with the back half, I'll let you know. I sure hope I shouldn't have cut it front to back, I'm kind of worried about that Is this a joke? Sorry, I am sorta slow. | ||
| Eaton_corners |
Whatever happened to the trap door idea? | ||
| Bigblock |
noone sent me a cover to try...LOL! My IAT temps don't seem to have changed noticeably. I know it is hard to tell, really, but the IA temp on the dash seems to respond about the same as it did with the cover on. I was worried about this, too, that the airflow just wouldn't be adequate over the sensor, and it wouldn't respond properly, but I think there is still enough air running through that snorkel to keep it pretty honest. After all, the outer airbox cover is still on, it may not be a sealed system anymore, but that is a significant sized hole there and it does lead straight to the intakes! (more or less...) | ||
| Lastonetherebuys |
I haven't had a close look under there for a while now. Would it be possible to seal the outer airbox cover some how that way you could have a larger air box and still keep the ram air effect is that not what the RR cover does, I mean make it a bigger air box? | ||
| Bigblock |
I would think the snorkel is also larger on the RR airbox, as in my non-engineer OPINION, this is the restriction point. I think the reason I got a performance gain by removing the inner cover, is it allows air to reach the motor around the snorkel. | ||
| 1_mike |
One thing that I think would help.... Is a longer snorkle..to be able to pick up "cool" air. If you stand about three feet in front of your bike...engine off..but fans running, you may (will) notice that "hot"...air is going "foward"...out of the radiators, at a pretty good clip. SO...with that in mind, as the bike speed overtakes the (HOT) air speed coming out of the two radiators, fans running...where does it go? ***Answer...right into the "cool air/ram air" duct. With my plan to see if I can fit a radiator behind the front tire (foolishly, been told I can't!!), I will have also allowed cooler air into the airbox inlet. Two problems solved with one action. The only possible hassle is I think the oil cooler will need moving also. Mike | ||
| Fresnobuell |
The only possible hassle is I think the oil cooler will need moving also. you are just scratching the surface of hassles with your proposal. | ||
| 1_mike |
Fresnobuell - Please explain. 1. Mounting tabs, no problem. 2. Brackets, no problem 3. Hose routing...maybe a little problem...but with bent as required aluminum tubing, shouldn't be a problem. 4. Tire clearance, just pick the right radiator size!!! 5. Oil cooler move...new lines...maybe on its side like the XB series bikes. What have I forgotten? Mike | ||
| Avc8130 |
Mike, Go for it! Prove all the naysayers wrong! ac | ||
| Fresnobuell |
Dunno what you are missing. Seems to me that IF you can find a radiator to fit, what happens when the forks compress? Plus there are some headers coming out there that seem like they might pose a problem. Good luck if you try it. Frankly, of all the projects that come up here, I don't see any benefit to putting the radiator behind the front wheel. Isn't the ambient air temp. sensor right around the snorkel? If so, doesn't it cool down substantially at speed? Are you sure that hot air is directed into the snorkel? | ||
| 1_mike |
"Isn't the ambient air temp. sensor right around the snorkel?" ***Yes "If so, doesn't it cool down substantially at speed? Are you sure that hot air is directed into the snorkel?" ***Take a look at the location of the fans in relation to the opening to the airbox... ***All hot air...a direct path to the air box opening. ***If you look at the front of these bikes, the airbox opening is the path of least resistance for the air to travel. ***Sure, there is some cooling..on a cool day. If you have 190 degree air coming out of the two radiators, and being forced by ambient ***temp air...lets say 87 degrees for an average Calif. day directly into the airbox opening...that still pretty hot air in a direct path to the ***air box. It doesn't really matter what the temp. sensor says...the engine is still getting an airbox full of unnecessarily "hot" air. Racers (car and bike) go to great extreme's to get the coolest air and fuel as possible into their engines. Why...there's more oxygen (the stuff that makes power) in cooler/denser air. I thought about a longer, or extension to the snorkle..but doing that right appears at first glance, to be just as difficult as a single radiator. The forks...with the forks at 21 degrees, there shouldn't be much interference problems. Mike (Message edited by 1_mike on September 02, 2009) |
