Hi,

I recently change the stock exhaust with V&H slip-on (slash cut), and the bike sounds happy.

As the next step, I’m considering V&H Air Intake and FuelPak. Probably V&H Rogue or VO2 Intake with FP3 (parts no. 66005)

My question is, does Open air intake and Fuelpak(different fuel map) change exhaust sound?
(For 18+ M8 engine Softtail)

I search a bit, and the answers seem very.

Some said NO, and slip-on sound will be the same since these will only increase the efficiency.

Some said YES, exhaust note and the engine vibration(especially during idle) will change so as feeling. Most case, no popping sound, deeper notes and more uneven engine feelings are mentioned.

I’d def go for deeper tone and lower temp.
I like popping sound somehow during decel so I might want this to stay though.

What’s your experience?

Thank you.

 

The short answer is the sound and feel can change depending on what you do with the FP3. You can change timing to get a lope in the idle, you can change decel pop, you can change the throttle response, you can stop lean surge if present, and you may get more intake noise depending on the air cleaner design.

 

Thank you, I thought that with FP3, I can only choose certain PreSet values. Since I already have v&h exhaust and I plan to have v&h air intake, I expect that the outcome is pretty much predictable.

My understanding was FP3’s goal is to increase the efficiency - not sure how this process affect the sound and feeling.

 

Here's what you can change with the FP3. Be careful with what you modify.....

Primary Throttle Blade Control
Secondary Throttle Blade Control
Switchover Gear
Throttle Limit vs Gear
Front Cylinder VE
Rear Cylinder VE
Front Charge Dilution Effect
Rear Charge Dilution Effect
Air Fuel Ratio
Acceleration Enrichment
Deceleration Enleanment
Closed Loop Range
Closed Loop Min Activation Temp
MAP Load Normalization
Intake Valve Opening
Intake Valve Closing
Adaptive Control Min Temp
Front Cylinder Spark Advance
Rear Cylinder Spark Advance
Spark Adjust by Engine Temp
Spark Adjust by Air Temp
Spark Adjust by Head Temp
Adaptive Knock Retard
Max Knock Retard
Knock Control Min Activation Temp
Knock Control Deactivation Temp
Idle Spark Control Gain
Idle Spark Control Max
Front Closed Throttle Spark
Rear Closed Throttle Spark
Closed Throttle Max TPS
PE Air Fuel Ratio
PE Spark
PE Disable RPM
PE Enable RPM
PE Disable TPS
PE Enable TPS
IAC Crank Steps vs Temp
IAC Crank Steps to Run
IAC Warmup
Idle RPM
Injector Size
Engine Displacement
Rev Limit
Gear Ratios

 

Ask Bryan from Vance and hines. He's super helpful and always on the forums. I think his handle is V&hbryan or something like that

 

Thank you.
I’ve found him, but he is banned. (?)
So I can’t send him a message.

 

Just mail at V&H, they will redirect you.