get the adjustable fl-vied-10 so you can fine tune.

 

Steve is great. Knows the Hearly machanic manual better than a Tech. I know I had him talk to a tech through conference call once. Steve put him to shame. Had mine on an 08SG. They have worked great. However, word of caution: they will conflict if there is a tuner on the bike. I had a V&H tuner that the dealer insisted I have with slip on pipes...yes, I know I was a newbie once too. When I added my Xieds it worked fine then they started to argue intemittantly. Drove me crazy with engine surges etc...yanked the V&H out sold it on Ebay and now no issues.

AND it's inexpensive! AND Cools the bike down.

 

Thanks for all the info guys.
How do adjust the Vieds....?

 

I have the fl-vieds on 2012 street glide. I run a v&h pro-pipe and screaming eagle ventilator. It took me about 10min to put them on, and I am very happy with the results. Cooler running, decel pop almost completely gone, smoother throttle and a little more noise. I emailed Steve and told he what I was running and he suggested a starting point which to set it at. I forget what that was. Very easy to adjust, just use a small screwdriver and turn it up or down. Some guys will say you have to have a tuner or get it dyno'd, but I was not looking to get every ounce of performance out of the bike. Just wanted to get it running less lean, and these did the job perfectly. I don't think you will be disappointed. Steve gives great customer service, he even answered my emails on a Sunday afternoon, within a hour or so!

 

Be advised that IEDs and variants thereof work only in closed-loop portion of the ECM's operation. On most bikes this is generally from idle to around 50% TP (throttle position), so any adjustments that are made will only affect this range, not the open-loop area that you encounter as you approach WOT.

IED's are basically inexpensive resistors that fool the ECM into thinking it needs to use more fuel to achieve the AFR specified in the ECM table, generally around 14.6:1 (near Lambda 1.0). The stock narrow-band O2 sensors can operate only in a very narrow range (hence the name) and consequently affect AFR very little. Going outside their range of around 14.4:1 may cause fault codes to appear, either in the form of enabling the CIL (check engine light) or throwing historical codes.

Another issue that I have with this approach is that enriching AFR in the cruise range does little to affect cooling but can hurt gas mileage considerably. I also doubt any major effect on throttle response even though there should be a slight improvement if AFR is enriched moderately.

I've run anywhere between 13.0 and 14.6:1 in the cruise range on my bike in testing using both the PCV with Autotune and the Power Vision tuners and have found little difference in cooling (none for oil temp, single-digits in °F for front cyl. head temp), no difference in subjective performance, but noticeable decreases in gas mileage. The difference noted in gas mileage was six mpg between 13.0 and 14.6:1 using the PV's calculated mileage gauges shown on the display unit. These display actual gas mileage in real time as you ride. I've settled on 14.5:1 in the cruise range, transitioning to 13.0 at WOT, and have been running those values for years with excellent results.

If I may make a suggestion, rather than spending $125 (or whatever) for IEDs, consider investing a bit more money in a real tuner that you can use to adjust more than just the closed-loop areas of the operating range. Good alternatives are the Fuel Moto line of tuners (rebranded Dynojet PC products offered at a low price), or better yet a PCV or PV. The PC-type tuners run in open-loop only and the PV can work either way, but it's a fact that the ECM is very capable of keeping AFR at the set values without feedback from the stock O2 sensors. These are used only to insure that the engine meets EPA regulations, not for any performance-related reasons. I tune with wideband O2 sensors and run open-loop (no sensor feedback) at all times and AFRs stay within 1% of their set values on average.