are they worth it or should i get something different?

 

I've got them on mine and while I didn't see some huge performance jump, my plugs look realistic now and the engine runs well..

 

I use them and just like Rail, no performance gain but they work, motor runs cooler no ping color the plugs and pipes good product for the cost. Yes some say you can make your own, great for a stock motor

 

If Look at the Dyno with XIED's They do well when reach 2,000 RPM but they still run lean below that and on the Decel... For a Stage 1 or More better off going with a PC III or T Max like I have plans to however for a stock bike think they are great ... but when did the Stage 1 knew was time to upgrade...

 

I have a question about the dyno sheet. If that was correct then wouldn't the engine overheat in slow traffic as that would be the rpm range of the engine? Xieds are just resistors that alter the vlotage sent back to the pcm. So what you show is the O2's aren't working below 2000 rpm.

 

I put them on my 07 deluxe,and like them,when it gets hot outside,the engine doesnt ping anymore,my gas mileage was fortynine miles per gallon last fall,it seems to me that I have a better responce when I turn the throttle back!!

 

If you haven't already, check out:
https://www.hdforums.com/forum/elect...ield-test.html

Everything you ever wanted to know about xieds, ieds and a bunch of other stuff. Some good info on how the EFI and ECM works.

I have a stock 08 Heritage except for slipons and I chose to go the conservative route (ieds). Sharper throttle response, better roll on, can go into 6th gear earlier, and I get a better tone from my slip ons. Did not detect any decrease in oil temp but mufflers don't seem to give off as much heat?

All subjective but the science behind them seems to make sense. Fools the ecm into running a bit richer.

 

One reason would like to see another Dyno with XIED's like I have if check the Dyno is no question is doing a fine almost flat 13.8 across the range after reaching 2,000 RPM ... But it does heat up in Heavy traffic and idling how much I don't know ...

 

I purchased $1 worth of resistors in place of the o2 sensors and the engine ran cool. I did this until I had the funds for a fuel management and dyno tune. After the dyno tune I can now run 100 miles get off the bike and touch the heat shields on the mufflers. the oil runs about 220, You can get an ir reader for about $25 at hobby shop. Great for not burning yourself when drinking hot chocolate

 

My bike runs between 200 and 220 oil temp all the time depending on outside temps. I can also touch my heatshields after riding. The exhaust temps are down quite a bit although I have never checked them. A piggyback module can fix just about anything as the PCIII eliminates the sensors and fixes a value to them so the ECM won't trip a code. I am not a fan of piggyback modules when the time comes most likely in the spring I will either go with the race tuner or the TTS mastertune with either one you can record what is going on with the bike and fix it from there. All the rest seem like trial and error