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post #1 of 23 Old 04-08-2009, 02:42 PM Thread Starter
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Two Brothers Exhaust

Just purchased my Two Brothers exhaust on ebay today! $245 + $22 shipping. BTW Scuzz, don't worry about the vid anymore, I saw this deal and couldn't pass it up. My next purchase is a PCIII. I'm still a college student working part-time, so I don't have the funds quite yet to purchase the PCIII. Should I leave the exhaust off until I get the PCIII? I don't want the quad to run too lean or rich and be bad for it.
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post #2 of 23 Old 04-08-2009, 02:48 PM
 
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If you want to use a HMF Optimizer I will give you a good deal on mine.
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post #3 of 23 Old 04-08-2009, 02:51 PM
 
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I also have the two brothers dobeck, if you want that since it's matched to the muffler.

I wouldn't run the muffler without it.



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post #4 of 23 Old 04-08-2009, 03:03 PM
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I also have a t/b exhaust, haven't ran it yet. Is everybody using Bo's map with this exhaust,
If not, what map do you guys have (use)?
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post #5 of 23 Old 04-08-2009, 03:26 PM
 
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Quote:
Originally Posted by scuzz View Post
I also have the two brothers dobeck, if you want that since it's matched to the muffler.

I wouldn't run the muffler without it.
EFI doesn't tend to run lean when changes like this are made like carb atv's do.

EFI measures airflow and gives fuel to match, Making simple changes like this will not adversely effect it. On carb atv's pressure changes from free flowing exhaust and intakes will cause a lower suction across the jet and make lean conditions. Works the other way also, If your intake is really dirty it makes a higher suction across the jet giving you a rich condition.
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post #6 of 23 Old 04-08-2009, 03:35 PM Thread Starter
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Originally Posted by smo0oth1 View Post
EFI doesn't tend to run lean when changes like this are made like carb atv's do.

EFI measures airflow and gives fuel to match, Making simple changes like this will not adversely effect it. On carb atv's pressure changes from free flowing exhaust and intakes will cause a lower suction across the jet and make lean conditions. Works the other way also, If your intake is really dirty it makes a higher suction across the jet giving you a rich condition.
So, it wouldn't be hard on the quad to run without the EFI controller? I'm definately going to get one, but if I can run it fine without the controller for awhile I'll go ahead and install it right when I get it.
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post #7 of 23 Old 04-08-2009, 03:42 PM
 
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Its safe
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post #8 of 23 Old 04-08-2009, 03:52 PM Thread Starter
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Thank You.
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post #9 of 23 Old 04-08-2009, 04:22 PM
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Its safe
I put a pipe on my Rincon 680 efi without the controller and after a jaunt down the trail and back my plug was snow white. Got the controller and the plug was tan.
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post #10 of 23 Old 04-08-2009, 04:24 PM
 
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