blackbrainedjohnny Posted February 22, 2010 Share Posted February 22, 2010 I gutted my muffler today and my dad thinks it could burn the valves. Is there any truth to this? Link to comment Share on other sites More sharing options...
Member Contributer pres589 Posted February 22, 2010 Member Contributer Share Posted February 22, 2010 I gutted my muffler today and my dad thinks it could burn the valves. Is there any truth to this? Doubt it, you probably didn't increase flow much at all really, a test ride should tell you if you leaned it out that much with increased lean-miss in the mid-range. If you achieved more than 10% more flow out of the cans doing that I'll be surprised, and at certain RPM's they may actually be worse now. Although you also blocked off the left side can; assuming you did that by plugging the under-tail y-pipe at the pipe itself, so there may be some improvement there (that factory setup is so crap...) so it's hard to say without a flow bench. Take it for a ride and see what it's like. Link to comment Share on other sites More sharing options...
bayarearider Posted February 23, 2010 Share Posted February 23, 2010 I gutted my muffler today and my dad thinks it could burn the valves. Is there any truth to this? Isn't it a restriction thing will burning valves,and isn't most of the restriction on the motor side of the "Cat" systems? Otherwise, the same thought would be true for any freer flowing slip-on... :comp13: Link to comment Share on other sites More sharing options...
Forum CEO HispanicSlammer Posted February 23, 2010 Forum CEO Share Posted February 23, 2010 One member here completely gutted his - I mean completely it was like a trombone, it ended up dumping raw fuel into the exaust and catching fire, ruined his bike. Billyjackjimbob is his name and the bike was called "the redneck express" it was obscene how loud that thing was! I am sure he gutted the catylic converter too. Link to comment Share on other sites More sharing options...
bayarearider Posted February 23, 2010 Share Posted February 23, 2010 One member here completely gutted his - I mean completely it was like a trombone, it ended up dumping raw fuel into the exaust and catching fire, ruined his bike. Billyjackjimbob is his name and the bike was called "the redneck express" it was obscene how loud that thing was! I am sure he gutted the catylic converter too. Yea, but it must have looked KOOL! http://www.youtube.com/watch?v=LxnZ1aslniU&feature=related :comp13: Link to comment Share on other sites More sharing options...
Member Contributer Alien VFR Posted February 23, 2010 Member Contributer Share Posted February 23, 2010 Look at the pic in my avatar. That's just open pipes. I've been running like that for over 15,000 miles without a single problem. Link to comment Share on other sites More sharing options...
blackbrainedjohnny Posted February 23, 2010 Author Share Posted February 23, 2010 Look at the pic in my avatar. That's just open pipes. I've been running like that for over 15,000 miles without a single problem. that thing must be pretty loud! Any video with sound? Link to comment Share on other sites More sharing options...
Member Contributer Ryanme17 Posted February 23, 2010 Member Contributer Share Posted February 23, 2010 I gutted my muffler today and my dad thinks it could burn the valves. Is there any truth to this? Well, since you opened one side and restricted the other, I wouldn't worry about it. Though FI VFR's do tend to run lean as it is... One member here completely gutted his - I mean completely it was like a trombone, it ended up dumping raw fuel into the exaust and catching fire, ruined his bike. Billyjackjimbob is his name and the bike was called "the redneck express" it was obscene how loud that thing was! I am sure he gutted the catylic converter too. Didn't BJJB have an electrical fire? Or was that just a code I didn't pick up on? Link to comment Share on other sites More sharing options...
Member Contributer sckego Posted February 23, 2010 Member Contributer Share Posted February 23, 2010 I've got over 50k on a set of completely gutted exhausts with catless headers... no issues with the engine so far. Sounds alot better then stock as well, without being overly loud. Link to comment Share on other sites More sharing options...
Member Contributer PhatPat33 Posted February 23, 2010 Member Contributer Share Posted February 23, 2010 I gutted my muffler today and my dad thinks it could burn the valves. Is there any truth to this? 45,000 on my '03. 30,000 of which are with the exhaust gutted. Love the sound! Passed Valve inspections with flying colors. Link to comment Share on other sites More sharing options...
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