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power commander or not?

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Old Apr 9, 2009 | 06:59 PM
  #11  
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KBFXDLI
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If you add the air cleaner you need a tuner. Go to the ecm/tuner threads and start reading about them plenty of info there. I did my stage 1 with the SERT.
 
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Old Apr 10, 2009 | 07:36 AM
  #12  
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Originally Posted by JRK5892
huh... wonder how it cold make more power by not taking in more air... weird... if you do just pipes no tuner is needed. if you do stage 1 to get the most out of that pipe, you will need tuner
Whhoopps i forgot to mention i do have a stage 1, it was installed before i got the bike, it orginally had rinehart slipons.
 
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Old Apr 10, 2009 | 07:43 AM
  #13  
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Originally Posted by JRK5892
huh... wonder how it cold make more power by not taking in more air...
I think that going from a 2-2 into a 2-1, even with the stock air cleaner, will still improve the performance of the bike over a stock 2-2. Although moot cause he has the stage 1. To me it should be similar to changing a stage1 bike from the 2-2 to 2-1. Just speculating though.
 

Last edited by rounder; Apr 10, 2009 at 07:51 AM.
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Old Apr 10, 2009 | 09:16 AM
  #14  
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Originally Posted by rounder
I think that going from a 2-2 into a 2-1, even with the stock air cleaner, will still improve the performance of the bike over a stock 2-2. Although moot cause he has the stage 1. To me it should be similar to changing a stage1 bike from the 2-2 to 2-1. Just speculating though.
That makes sense to me. People talk all the time about wanting some back pressure in exhaust, but that isn't really true. What you want is the scavenging effect on a naturally aspirated engine. 2-1 are much better at that.
 
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Old Apr 10, 2009 | 09:19 AM
  #15  
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Originally Posted by DGDyna
.....
Conversely, if you put a high volume air cleaner system but didn’t get new pipes, more air would get into your cylinders but it couldn’t get out.
....
So eventually your cylinders are going to explode from all that extra air getting in there and not leaving? come on....

Folks, a restriction anywhere in the flow-path (intake, heads/cam/valves, exhaust) will limit the amount of air the engine can pump. If you don't look at the system as a whole, you're just kidding yourself into thinking you've got "major HP gain" by installing a single component.

Think of it like this: Let's say you have a 3 foot tube. The first foot represents the intake, the 2nd would represent the head/cam/valves... 3rd the exhaust. If you blow in the end of the tube, it doesn't matter where the restriction is, the flow through the entire tube normalizes and is reduced to what the restriction can flow.

I understand the system I want eventually, but I need to buy one piece at a time for now. I hold no outrageous expectations over slowly "stepping" the system up.

I'm also using the TTS, and I'll tell you the Stage.1 remap from the MoCo is crap. I realize now just how bad the bike vibrated because of that map.
 
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Old Apr 10, 2009 | 09:38 AM
  #16  
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Everybody talks about restrictions but has anyone seen the flow numbers to determine where they are? A stock 96ci engine at 6000 rpm and 75% VE will only flow about 188 cfm. Does anyone know what the stock intake and air box will flow? I don't know either but I'm just curious if someone has some flow bench numbers.
 
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Old Apr 10, 2009 | 10:29 AM
  #17  
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Originally Posted by jstreet0204
Everybody talks about restrictions but has anyone seen the flow numbers to determine where they are? A stock 96ci engine at 6000 rpm and 75% VE will only flow about 188 cfm. Does anyone know what the stock intake and air box will flow? I don't know either but I'm just curious if someone has some flow bench numbers.
not sure. I actually would be interested myself. One thing I always wondered... is getting a stage 1 intake all that much better than exchanging the stock air filter for a K&N. Perhaps a couple hp, but, can it really be felt on the road? Obviously the stage 1 intake does allow for more variety in visual appeal.
My thoughts are such that if I bought a new H-D with FI (I have a carb) I would just get a K&N filter and 2-1 exhaust. Also xied's to lower the afr from the 14.7:1 . Seems like the most cost effective way to increase the output of the engine without really giving up much vs the tuner, stage 1 intake,and dyno method. Is an extra 400+ dollars really worth the couple HP. you may gain?
 
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