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Intake and Exhaust Intake and Exhaust Systems for Road Glides

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post #1 of 4 (permalink) Old 04-16-2018, 08:22 PM Thread Starter
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Changed exhaust

I have a 2016 road glide An have the Harley stage 1 download. I had the python 2-1 exhaust on it An recently changed it with Vance & Hines true duals with DNA slip ons. When i get on the throttle it takes a few seconds to respond. But when you ease into its fine. Anyone know what this could be? Do i need to remap it or buy the fuel pack? Any help would be greatly appreciated
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post #2 of 4 (permalink) Old 04-16-2018, 09:39 PM
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You lost torque going from that 2-1 to the true duals. That may be the lag you're feeling. My personal opinion. I would get a fp3 and install the map for your setup. That harley download is about useless. Then change the throttle response to standard plus.

That's what I would do. Others will have other opinions. That's what I have and it makes it like different bike.
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post #3 of 4 (permalink) Old 04-16-2018, 11:02 PM
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I've used the FP3 on several bikes and love it. V&H customer service in my book is top notch. Any time I make a drastic change I either call or email them for the recommended map and it has always worked out. The last time I made a change to the bike I had a similar issue with throttle response and with a quick call to them I was out pounding the pavement with no problem.

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post #4 of 4 (permalink) Old 04-17-2018, 10:07 AM
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Originally Posted by RFG7680 View Post
You lost torque going from that 2-1 to the true duals.
Exactly....... If I had a perfectly great 2-1 I'd never switch over to true duals. A good 2-1 head pipe properly tuned will give you better torque and hp numbers than a true dual ever can on a v-twin motor. The only exception I can see to that rule is a full blown, large displacement race type motor.

That's why so many folks that want the dual look on their dressers compromise with a 2-1-2 pipe so at minimum you get a crossover to help with exhaust gas velocity, back pressure and scavenging.

The FP3 is a good plug and play tuner. It couldn't hurt, but there's no way that it can change the physics.

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