Slip-on W/Ex. valve?
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RE: Slip-on W/Ex. valve? - 2/18/2008 3:05:37 PM
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DWT74
Posts: 167
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No leave it on the stock exhaust and tuck your cables next to the battery box using a zip tie and dont worry, It wont hurt it except run a little rich (more). A power commander will help that.
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RE: Slip-on W/Ex. valve? - 2/19/2008 10:42:24 PM
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Volksdragg
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I know that you don't use the valve with a slip-on, but what would happen if you incorporated the valve with the slip-on? Would mid-range be better than with just the slip-on?
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06 1000RR with stuff
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RE: Slip-on W/Ex. valve? - 2/24/2008 7:25:17 PM
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Silver Wing 06
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i dont know i just did my slip-on install today and i removed the cables from the servo totaly they are in the pile of parts i took off the bike. i dont like zip ties on anything if i can remove it. sounds much better now with the stock pipe gone in favor of a m4 slip-on!
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RE: Slip-on W/Ex. valve? - 2/25/2008 4:25:44 AM
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sweetdeal
Posts: 249
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i am sure if you were to "add" that valve to an aftermarket pipe it would work the same and your exhaust would be slightly quieter at low rpm,
Correct me if i am wrong but the valve is there to close off at low rpms to help build back pressure, giving your more torque from dead stops. so leaving it doesn't sounds like a bad idea, but it is these sort of factory items you are trying to get rid of by installing the aftermarket pipe because it is going to restrict your airflow on the top end where you want more response,
_____________________________
"if everything is under control your going to slow"
~Mario Andretti
2006 CBR 1000rr Candy Blue / Yellow
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RE: Slip-on W/Ex. valve? - 2/26/2008 2:26:48 AM
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Volksdragg
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I know why manufactures put it in their bikes and they wouldn't spend hundred of thousands of dollars on research and development and not implement it on their bikes if it didn't work. Almost all dyno runs I've seen has a lower power rating in the low rpm range with a slip-on compared to stock. I guess no one has left the valve on with a slip-on yet. I guess I'll be the first to try it. Thanks for the input.
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Innernet????? Say it right!!!!
06 1000RR with stuff
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RE: Slip-on W/Ex. valve? - 2/26/2008 4:33:41 AM
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sweetdeal
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to me it seems like all you gain by adding the valve back onto a slip on would be the low end torque, The rest of the power band will be lower, To me the pros of welding it back in won't outdo the cons? I think it is going to restrict to much air flow to get any real gains from the slip on, Basically it will just be a loud "stock pipe". the bikes run rich so adding the valve just means a little less throttle when moving from a dead stop.
But i am by no way an expert on the subject. But wouldn't it be the same as adding fancy chrome tips to a stock car exhaust? Change sthe look and maybe the sound but not the airflow?
_____________________________
"if everything is under control your going to slow"
~Mario Andretti
2006 CBR 1000rr Candy Blue / Yellow
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RE: Slip-on W/Ex. valve? - 2/26/2008 11:22:10 AM
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Volksdragg
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How does the valve restrict air flow when the valve is the same O.D. as the I.D. of the pipe? and opens to a full 90 at 6000 rpm? Also the weight savings of a slip-on is of greater benefit being an under tail canister. Being that I have one of the sexiest bikes, It's all about the glam now, I'll never be above 6000 rpm all the time on the street, but having the most power the engine can produce at the lower rpms would benefit me most.
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Innernet????? Say it right!!!!
06 1000RR with stuff
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RE: Slip-on W/Ex. valve? - 2/26/2008 12:07:30 PM
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MgA_ODEN
2005 Ride Of
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quote:
ORIGINAL: Volksdragg
How does the valve restrict air flow when the valve is the same O.D. as the I.D. of the pipe? and opens to a full 90 at 6000 rpm?
Your kidding right? It may be open at 90ยบ but it doesnt disappear.
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Black 2004 CBR1000RR
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RE: Slip-on W/Ex. valve? - 2/26/2008 3:23:32 PM
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sweetdeal
Posts: 249
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anything that doesn't allow air to flow in it's natural state will effect it, Thats one reason people polish headers and manifolds in cars, just creating a smooth surface will help over a tube in is natural state.
So removing a metal disk rivited to a rotaing bar and hinge will obviously help air flow, when you take off your stock pipe you will see it. It isnt very small. Picture air moving through a pipe almost the same as water flowing down a river, if it is rocky you will create turbulence, if it is nice an smooth, water (exhaust gases) will flow much easier and with less resistance. nice straightlines.
_____________________________
"if everything is under control your going to slow"
~Mario Andretti
2006 CBR 1000rr Candy Blue / Yellow
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RE: Slip-on W/Ex. valve? - 2/27/2008 11:07:34 AM
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Volksdragg
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I know there is a small amount of resistance, but not more than your muffler. The point I'm trying to make is "wouldn't the valve help a slip-on in the lower RPM range" and if any one done it? Actually I don't think it'll work. I think some one would have to make a slip-on to accommodate the valve because of the diameter of the tubing after the valve.
By the way, I have never heard of anyone polishing headers... I know I port and polish heads and intake manifolds... I might be wrong though.
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Innernet????? Say it right!!!!
06 1000RR with stuff
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RE: Slip-on W/Ex. valve? - 2/27/2008 11:36:18 AM
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sweetdeal
Posts: 249
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quote:
ORIGINAL: Volksdragg
I know I port and polish heads and intake manifolds...
that is what i was getting at...And people buy after market headers for more direct airflow with less curves and smoother interior finish...btu anyways.
and as far as your question, yes if you were to add it, it would help on the low end, But you would loose on everything else. Which the whole reason you are adding a slip on is for the "everything else" You ride the bike around more in the "everything else" range.
If all you did was stop and go bumper to bumper traffic "all the time" Then it would be worth it. (but that isn't why we buy motorcycles is it?)
There are Pros and Cons to every modification, You gotta give in order to get. If you add the valve to a Slip on, you loose alot of the benifits of the slip on. To gain better airflow for HP and throttle response you sacrifice low end torque, but this is all justified because the bike has planty of torque to loose a little. You add the valve back into the equation, you get the torque back, but loose your HP and throttle response gains the slip-on originally gave you.
_____________________________
"if everything is under control your going to slow"
~Mario Andretti
2006 CBR 1000rr Candy Blue / Yellow
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