Simple (?) Exhaust Question
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Joined: May 2008
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Simple (?) Exhaust Question
I just added the newer Vance slash slip-ons to my 09 ultra. I understand that these can be run without any other air-fuel mods and wonder if any experienced users/techs can give their experience on this.
Also, does it make any sense to add an after-market fuel management system if I do not want to add high-flow air filter? All I am after is a little sound. The Vance fuel system only provides settings with free-flow air filter.
An old question but some previous posts are more involved than my question. Thanks for your help as I normally just a reader of all the informative posts.
Also, does it make any sense to add an after-market fuel management system if I do not want to add high-flow air filter? All I am after is a little sound. The Vance fuel system only provides settings with free-flow air filter.
An old question but some previous posts are more involved than my question. Thanks for your help as I normally just a reader of all the informative posts.
Outstanding HDF Member
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Here's a question I have as well. I intend to do slip ons, Samson or Rush possibly, but I also wanted to use a K&N filter element. Does that require a fuel management change or will I be OK with those two simple mods?
Outstanding HDF Member
Joined: Jul 2007
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From: Indy area
Obviously, if you compared corrugated cardboard to gauze, the material/makeup of the filter element does play a part in how much/well it will flow air. But in the real world, assuming clean filter elements, the major differences in intake flow will be gotten by the design of the airbox itself and not the element inside it. So just changing out the filter element inside your stock airbox shouldn't require reprogramming the fueling.
However, you might be flirting with that "necessity" if you combine freer-flowing mufflers with a freer-flowing filter element. It's my opinion that even just the mufflers can benefit from different fueling commands and I recommend that in every case if you can afford it. Some might argue against that as being not cost-effective enough but I'm not suggesting it'll always be the most cost-effective. Merely that the result will be worth the money to someone who appreciates such things and has enough discretionary cash to do it.
However, you might be flirting with that "necessity" if you combine freer-flowing mufflers with a freer-flowing filter element. It's my opinion that even just the mufflers can benefit from different fueling commands and I recommend that in every case if you can afford it. Some might argue against that as being not cost-effective enough but I'm not suggesting it'll always be the most cost-effective. Merely that the result will be worth the money to someone who appreciates such things and has enough discretionary cash to do it.
Ultimate HDF Member
Joined: Mar 2008
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From: SW Florida
To comply with EPA rules, the HD twin cam motors are set to run lean, which means HOT. Each change you made to let the engine to breath better make the engine run more lean. A fuel management system is the best way to go to reduce the lean conditions. If you're looking at the Rush mufflers and a K&N filter, you may want to look at Fuel Moto. They have combo specials that include Rush mufflers, high flow A/C, fuel management system and map at a very good price. There support is excellent also.
Road Warrior
Joined: Nov 2006
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From: Lancaster, PA
You don't say what year and model bike you want to modifiy.
To comply with EPA rules, the HD twin cam motors are set to run lean, which means HOT. Each change you made to let the engine to breath better make the engine run more lean.
A fuel management system is the best way to go to reduce the lean conditions. If you're looking at the Rush mufflers and a K&N filter, you may want to look at Fuel Moto. They have combo specials that include Rush mufflers, high flow A/C, fuel management system and map at a very good price. There support is excellent also.
To comply with EPA rules, the HD twin cam motors are set to run lean, which means HOT. Each change you made to let the engine to breath better make the engine run more lean.
A fuel management system is the best way to go to reduce the lean conditions. If you're looking at the Rush mufflers and a K&N filter, you may want to look at Fuel Moto. They have combo specials that include Rush mufflers, high flow A/C, fuel management system and map at a very good price. There support is excellent also.
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