Removing baffles... how loud is it

[karbyn]

Originally Posted by 1badbaker

About 1 month after the debaffle I did the demickey too. It sounds really nice. Not near as loud as aftermarket pipes though.

Dont be scared Debaffle, you won't be disappointed, after that you will demickey. Im with baker on this one. My mickey plate came out no less than one week after the baffles. New pipes are in the future, but not until I have enough cash to do the dyno jet and intake at the same time.

[RicVARider]

If any of you are concerned about the MPG with this mod watch out. I drilled 6 3/8" holes in the back plate of my pipes and lost about 3-4 MPG...not cool. One reason I take the bike and the wife likes to ride the bike is the MPG.
I haven't debaffled, but does it help or just get worse?

[mblack50]

I've had 2 harley's and it isn't that loud compared to them with straight pipes but it has a cool unique sound that can be heard around the neighborhood.

[DaveAlvarado]

Originally Posted by RicVARider

If any of you are concerned about the MPG with this mod watch out. I drilled 6 3/8" holes in the back plate of my pipes and lost about 3-4 MPG...not cool. One reason I take the bike and the wife likes to ride the bike is the MPG.
I haven't debaffled, but does it help or just get worse?

I seriously doubt it was the holes. 3-4mpg can be explained just in driving style--if you are getting on the throttle a little harder to hear your new exhaust mod better, you could kill your gas mileage by that much.

[cyclesinct]

Originally Posted by RicVARider

If any of you are concerned about the MPG with this mod watch out. I drilled 6 3/8" holes in the back plate of my pipes and lost about 3-4 MPG...not cool. One reason I take the bike and the wife likes to ride the bike is the MPG.
I haven't debaffled, but does it help or just get worse?

What is your reasoning behind the drilled holes causing you to get less mileage? I don't understand how letting a little more exhaust noice out causes MPG to decrease. it doesn't take more gas to get the bike going with the holes right? I have debaffled, but I never tracked my MPG prior to debaffling, so I have no idea if it really does affect it. I'm also no mechanic or engineer.

[07M50Limited]

Originally Posted by RicVARider

If any of you are concerned about the MPG with this mod watch out. I drilled 6 3/8" holes in the back plate of my pipes and lost about 3-4 MPG...not cool. One reason I take the bike and the wife likes to ride the bike is the MPG.
I haven't debaffled, but does it help or just get worse?

I dont think that is the cause!!!!...I went for a 360 mile ride last weekend, after installing HardKrome 2-1 exhaust, which is almost straight pipes, Hypercharger, and a PCIII, on the Highway at 70-75 MPH...I was still getting 55MPG
Also before those Mod's, I had 6 3/8 holes drilled in stock pipes, and avg'ed between 47-53 MPG in town, back and forth to work. The way you ride, can cause that much diffrence.

[RicVARider]

Originally Posted by DaveAlvarado

I seriously doubt it was the holes. 3-4mpg can be explained just in driving style--if you are getting on the throttle a little harder to hear your new exhaust mod better, you could kill your gas mileage by that much.

I can gaurantee that the mileage decrease is a direct reflection to the holes drilled in the end of the pipes. Before the mod I used to rev the bike periodically, not all of the time mind you, but a good amount of time. I also used to get on it from time to time to feel the power! I averaged 48-50 MPG regularly as I tracked it with EVERY tank.
After the mod I will admit I reved the bike a little more to hear the pipes. But then I realized I was getting like 45MPG as I was still tracking the mileage with every tank. I then have made a concerted effort to not rev as I now don't do it very much at all and average at most 46.5 MPG for about a month now. Besides that I can distinctly smell the fumes of gas when the bike is at idle. Something that I never smelled before the mod.

Originally Posted by cyclesinct

What is your reasoning behind the drilled holes causing you to get less mileage? I don't understand how letting a little more exhaust noice out causes MPG to decrease. it doesn't take more gas to get the bike going with the holes right? I have debaffled, but I never tracked my MPG prior to debaffling, so I have no idea if it really does affect it. I'm also no mechanic or engineer.

I actually went to a mechanic and he told me that the decrease in back pressure has an effect on the MPG and that is also the reason for the gas smell. The only way to fix it is to go back to stock.

So has anyone taken MPG measurements with stock pipes / drilled pipes / and debaffled pipes? I would really like to know if it gets worse or better or the same if I debaffle.

[07M50Limited]

Originally Posted by RicVARider

If any of you are concerned about the MPG with this mod watch out. I drilled 6 3/8" holes in the back plate of my pipes and lost about 3-4 MPG...not cool. One reason I take the bike and the wife likes to ride the bike is the MPG.
I haven't debaffled, but does it help or just get worse?

You didnt happen to do a oil change, about same time, did you?
I know there is a lot of mixed feelings about oils, but, my MPG when up, after I started running Rotella Syn. in the engine, and Moble 1 Syn. in the rear gears.

[RicVARider]

Originally Posted by 07M50Limited

I dont think that is the cause!!!!...I went for a 360 mile ride last weekend, after installing HardKrome 2-1 exhaust, which is almost straight pipes, Hypercharger, and a PCIII, on the Highway at 70-75 MPH...I was still getting 55MPG
Also before those Mod's, I had 6 3/8 holes drilled in stock pipes, and avg'ed between 47-53 MPG in town, back and forth to work. The way you ride, can cause that much diffrence.

So from my above comments I can only assume that the drilled pipes have an effect on MPG. Unless you can think of other mechanical things that can decrease the mileage as I can promise you I don't rev the bike any more that I did before the mod as it bothers me that I don't get the same mileage as before. I also feel a loss in power as a result in the loss of back pressure. So I don't get on the bike like I used to b/c I am bummed about the whole thing. So any other ideas? Think debaffled will make it better?

[RicVARider]

Originally Posted by RicVARider

So from my above comments I can only assume that the drilled pipes have an effect on MPG. Unless you can think of other mechanical things that can decrease the mileage as I can promise you I don't rev the bike any more that I did before the mod as it bothers me that I don't get the same mileage as before. I also feel a loss in power as a result in the loss of back pressure. So I don't get on the bike like I used to b/c I am bummed about the whole thing. So any other ideas? Think debaffled will make it better?

Now this is all
I have a guy with a yamaha 650 who actually went down 5 MPG after switching to synthetic. So I am all screwed up!!

[07M50Limited]

Originally Posted by RicVARider

Now this is all
I have a guy with a yamaha 650 who actually went down 5 MPG after switching to synthetic. So I am all screwed up!!

I told you...Mixed feelings...but I swear by it...But did you do a oil change, around same time?

[07M50Limited]

Now I dont use Amsoil, I use Rotella, but this page has lots of reasons you can see diffrences in your MPG...even with Syn.
Fuel Economy Improvements with Synthetic Oil

[07M50Limited]

Quote
"I actually went to a mechanic and he told me that the decrease in back pressure has an effect on the MPG and that is also the reason for the gas smell. The only way to fix it is to go back to stock."

You can test this, but making some round plates, to cover the holes, and attach them with a couple sheet metal screws, they dont have to seal completely to increase the back pressure.

[cyclesinct]

Ok...so what does back pressure have to do with MPG? the extra pressuer doesn't go back into the engine to help compress the pistons resulting in less gas needed right? What was the mechanics explanation for how it actually caused it to go down? I know you said back pressure, but what about back pressure helps in the MPG area?

[07M50Limited]

I know it never effected my MPG, but also Im no expert in this field, I do know reduced back pressure affects torque, but lets the engine run better at higher RPM's, Im guessing...maybe you feel this effect, and give it more gas to get going. I know for a fact, mine ran better with the 6 holes drilled, and like a bat outa he&&, with the new pipe and PCIII and air filter, and I still get the around the same in town, and maybe better on the highway.

[Paper Plane]

i strongly believe de-baffled pipes/ aftermarket pipes/ any form of modified pipes will INDEED increase fuel consumption.

simply because of how awesome your new pipes now sound over the OEM version, you find yourself revving harder, and going off the line harder (sts). I speak from personal experience.

[nicocorea]

I don't know about economy, but in my experience reducing backpressure definitely affected my engine performance. Here's how: After riding around debaffled for a few months, I got the itch again so I demickeyed and decyclopsed my pipes. And I have to be honest with anyone considering this mod: it certainly harmed my high-end torque.

After the procedure, I had trouble accelerating through the 90s. WOT, I have to be going downhill to get above 95! That was definitely not the case before I demickeyed and decyclopsed. Plus, one day I got lucky and got a good point of comparison --I hooked up with a C50 with for an hour or so at around 75-95 mph. It had Cobra Slash Cuts and I would watch whenever he went WOT in 5th gear to pass a car or something. I'd do it too. But he definitely had stronger acceleration than I did. Before the procedure, I'm sure I could have kept up with him when he went WOT.

Since, I replaced my gutted stock pipes with cobra slashcuts. Now my bike powers through the 90s and into the low 100s like before, and seems to be more powerful at all speeds.

[07M50Limited]

Originally Posted by nicocorea

I don't know about economy, but in my experience reducing backpressure definitely affected my engine performance. Here's how: After riding around debaffled for a few months, I got the itch again so I demickeyed and decyclopsed my pipes. And I have to be honest with anyone considering this mod: it certainly harmed my high-end torque.

After the procedure, I had trouble accelerating through the 90s. WOT, I have to be going downhill to get above 95! That was definitely not the case before I demickeyed and decyclopsed. Plus, one day I got lucky and got a good point of comparison --I hooked up with a C50 with for an hour or so at around 75-95 mph. It had Cobra Slash Cuts and I would watch whenever he went WOT in 5th gear to pass a car or something. I'd do it too. But he definitely had stronger acceleration than I did. Before the procedure, I'm sure I could have kept up with him when he went WOT.

Since, I replaced my gutted stock pipes with cobra slashcuts. Now my bike powers through the 90s and into the low 100s like before, and seems to be more powerful at all speeds.

Thats a good report...., I never checked MPG before I put baffles in new pipes, but it sure runs good now...and MPG has not suffered....all my test are in thread, called baffle test

[Rumrunner]

Originally Posted by nicocorea

I don't know about economy, but in my experience reducing backpressure definitely affected my engine performance. Here's how: After riding around debaffled for a few months, I got the itch again so I demickeyed and decyclopsed my pipes. And I have to be honest with anyone considering this mod: it certainly harmed my high-end torque.

After the procedure, I had trouble accelerating through the 90s. WOT, I have to be going downhill to get above 95! That was definitely not the case before I demickeyed and decyclopsed. Plus, one day I got lucky and got a good point of comparison --I hooked up with a C50 with for an hour or so at around 75-95 mph. It had Cobra Slash Cuts and I would watch whenever he went WOT in 5th gear to pass a car or something. I'd do it too. But he definitely had stronger acceleration than I did. Before the procedure, I'm sure I could have kept up with him when he went WOT.

Since, I replaced my gutted stock pipes with cobra slashcuts. Now my bike powers through the 90s and into the low 100s like before, and seems to be more powerful at all speeds.

All right. I got my hole saws.....And Now I see this? Dang. So you say you didnt see a big decrease in torque with just the baffles ripped out?

To hell with it...they are coming out.

Tell you in a couple of hours if it made a big deal....

[Rumrunner]

Ok....no noticable difference in power/torque. Sounds nice too......

Now, about that paint job......LOL