| Author | Message | ||
     Miko_k |
When sitting in traffic, I noticed that the airbox gets really hot, I take off and get some knock in the engine for a few miles, until it cools down. My approach- I opened up the front of the airbox and got a 2006+ cover( I have a 2004XB12R), installed a small PC fan on the back, sucking out. It should constantly cool down the airbox and the opening will give the engine some more air. http://memimage.cardomain.com/ride_images/2/4833/4 881/24582440301_large.jpg http://memimage.cardomain.com/ride_images/2/4833/4 881/24582440302_large.jpg | ||
| Randomchaos |
Interesting concept. Any test results back from it? I get pinging after sitting in traffice forawhile as well. Never thought of the air temp going into the motor though. Figured it was just from the motor itself getting extremely hot while sitting still. | ||
| Nillaice |
HMMMMM.... please keep us posted on the results | ||
| Krueger08xb12s |
Does this mean the bike's prone to sucking water if it rains?? | ||
| Miko_k |
I am guessing it could get the front of the filter a little damp, but not more than any other 2006+ with an open airbox. Will post results asap! | ||
| Randomchaos |
Hmm I actually just thought of something. Not sure if its a big deal, but the PC fan might get burned out rather quickly. When you go WOT, the motor is sucking in enough air, that the PC fan will probably be struggling to blow air out of the airbox. At idle though, I dont think the intake pressure would be enough to effect it. Im probably wrong somehow in my thought process though. | ||
| Wikid_intent |
IIRC at wot the intake/intake manifold pressure is equal to atmospheric pressure. Thats why turbos and surerchargers work. | ||
| Miko_k |
I think I put big enough of a hole on the front of the airbox + the one through the frame, so it will not try to spin the little fan backwards. (Message edited by miko_k on March 08, 2009) | ||
| Wikid_intent |
It will not spin backward. | ||
| Swordsman |
Er.... has anyone else had this problem? Sounds kinda' bizarre that the engine would be causing enough heat buildup in your airbox to cause predetonation. Sounds more like symptoms of a tuning issue than a problem with hot air.... ~SM | ||
| Miko_k |
Well, bone stock 2004 XBR, quite a bit of ping in the summer, I am trying to help it anyway I can, since I am moving to FL soon and it will be like that all the time. I will throw a set of colder plugs in it too and as a last resort, will hotwire the fan on low speed. | ||
| Swordsman |
Are you the first owner? If not, someone may have tinkered with the timing a bit (the timing cover on the right side will have screws instead of rivets, you may know that already). Or perhaps your area has some ethanol-heavy gas. I believe that is supposed to contribute to ping as well. I like the PC fan idea though. If my rear cooling fan craps out again, which it's acting like it may do so (2nd one in 3 years!), I might look into rigging a PC fan "block" to handle the job! These stock fans are junk! ~SM (Message edited by Swordsman on March 09, 2009) | ||
| Miko_k |
I got the bike with 406 miles on it, someone did not pay and got repoed, nothing was touched. The ethanol does sound plausable, 91 octane with 10% was what I ran last summer, could not find 93 octane at all. I am sure my engine was getting hot, even though the fan was on high, but my idea is just helping a little bit on the cooling with the little fan. I might also block the stock funnel that runs through the frame, because the frame itself gets hot and it heats up the rubber snorkel, which makes a hot air intake out of it. The 2006+ design really kills a bunch of birds with one stone... | ||
| Kowpow225 |
I'd bet the timing may be a bit on the advanced side. Also Odie makes terrific airbox heat shields to aid in your science experiment. http://www.specialops-online.com/ I've often wondered if a crafty bueller has ever wired up the rear cooling fan to a bypass switch so you could just kick it on whenever you want as well as letting it run by thermal activation the way its supposed to. Maybe put an extra toggle switch up on the handlebars so you could kick it on at a stoplight. What do you think? | ||
| Miko_k |
I already have better heat insulation than what I see in the link, made from home depot pipe insulation(the 1/4" foam with aluminum backing) I run 2 layers, foam-to-foam, around the airbox and all the way to the rear compartment. I even drilled 1" holes on both sides of the tail light bulge on the undertail. I am going to wire the low speed of the fan right to the Neutral light on the dash, with a relay of course. |
