exhaust...?
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6th Gear
Joined: Apr 2015
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From: NJ
exhaust...?
I am trying to make a decisuon...tab or V&H slip-ons 2x2. Question is to go fuel management or auto tuner and by what manufacturer? Pros one cons would be much appreciated.
I really liked V&H FP3 options only to find its not available for 2014 VRod muscle .
Cheers
Paul
I really liked V&H FP3 options only to find its not available for 2014 VRod muscle .
Cheers
Paul
V&H 2-into-1 and Powercommender Wideband2 (Dynojet)
My preference would be for the V&H 2-into-1 stainless-steel slip-on pipe with the fiberglass muffler packing replaced with six 3M stainless-steel "potscrubbers" ($3 Walmart). Five of the potscrubbers opened into a donut and strecthed around the internal preforated muffler blank and one positioned just after the collector throat in the exhaust to control exhaust recursion. Recusion means that some ambient air gets sucked into the exhaust during hard dethrottling, idle, low rpm cruising allowing oxygen to make it all the way up to the O2 sensors. Once the O2 sensor sees oxygen the ECU enrichens the fuel-injectors making the engine run too rich. Only other way I know is a butterfly valve type restrictor about an inch inside the far end of the exhaust outlet
RE-EDITED -- Gave incorrect info: I took the time to look it up and it is the Dynojet(tm) PowerVision flash tuner with Autotune option (not the Wideband2 system I had mentioned). The PowerVision and Autotune would cost just under $1000 total but gives you complete flexibility in tuning and re-flashing your ECM. Autotune comes with wide-band O2 sensors. AFR maps available for downloading off their site covering a number of usual setups.
BTW, Stoic ratio is 14.7:1 (air:fuel by weight) for pure gasoline which we don't use anymore. Now our E10 fuels contain 10% Ethanol and that having a stoic ratio of 9:1 brings that to somewhere around 13.?:1 or so.
Here is the website: http://www.dynojet.com/
RE-EDITED -- Gave incorrect info: I took the time to look it up and it is the Dynojet(tm) PowerVision flash tuner with Autotune option (not the Wideband2 system I had mentioned). The PowerVision and Autotune would cost just under $1000 total but gives you complete flexibility in tuning and re-flashing your ECM. Autotune comes with wide-band O2 sensors. AFR maps available for downloading off their site covering a number of usual setups.
BTW, Stoic ratio is 14.7:1 (air:fuel by weight) for pure gasoline which we don't use anymore. Now our E10 fuels contain 10% Ethanol and that having a stoic ratio of 9:1 brings that to somewhere around 13.?:1 or so.
Here is the website: http://www.dynojet.com/
Last edited by JayDRod; Apr 29, 2015 at 08:15 PM. Reason: Gave wrong info -- researched and corrected it here.
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