I'm new to this forum, and I still do not know all of the ins and outs, of it yet. I'm very interested in this posting, because I'm getting my first Harley, 08 Ultra in a few weeks, and have ordered the Nightrider 02 IED's, and want to see what every one is saying about them, so I'm posting this to add the e-mail to replies. I hope this works. If I need to do something else, to get email alerts, could someone let me know.

 

+1

 

Got my attention....

still cold out , so more input will help me decide!

 

Hey guys, just wanted to thank all of you for the great details.Mr. Clean, my fingers were sore just looking at your write up. This is good stuff! Also, you may want to look at the article in this months American Iron about the S&S bolt on Air Cleaner gaining 10hp. It states that the ECM will self adjust to AC or pipe changes, returning the A/F mixture back to the factory setting of 14.7:1, without a download.

Thanks Again!

 

Build your own IEDs' for about $1.00 at radioshack. Do some reverse engineering and your done. Look up "devide by calculator" on the net. Electronic guys know what I'm sayn.

 

snuffer: Thanks, I read the article in AIM. However, based on my personal experience, I do not agree withthe part about the A/F returning back to 14.7.

I purchasedmy used '07 Road King Classic from a H-D dealer. The dealer was not the original selling dealer, had no service history on it, butsaid it was traded in to them on an Street Glide. It had the Screamin' Eagle Stage 1 air cleaner kit on it andstock pipes.The dealer thought that the original owner may have had aftermarket pipes on it and replaced them with the stock pipes beforetrading it. I thought that perhaps the original owner might have had the ECM recalibrated. Before signing the final papers, I had the dealer put it on their computer and they said the ECM has the original factory fuel mapping.

I thought that it might be running lean with the SE A/C, so I had it dynoed. In closed loop mode the A/F was 15.1. Even though the O2 sensors were connected the A/F was still leaner than 14.7. That is why I disagree withthe AIMstatement.

If I had known thenwhat I now know about the lean running issue, I would have insisted that the dealer either do the Stage I download or install a stock air cleaner before I paid for the bike.

 

Could you post how to do it in the DIY thread. Thanks...Trucky911

 

Thanks Gundog......my 02 doesn't have the 02 sensors. Cool picks. Now I know what you were getting at.

 

This is correct. But rather than throttle position, it's load. So at low load, i.e. light throttle and cruising, you're in closed loop. I know... same difference.

I agree.

It's possible that with the stage 1 mods, you've upped your VE (actual, not what's stored in the map) enough that the closed loop is out of it's range for correction. Of course, the dyno sniffer could just be reading leaner than the stock sensors or the stock sensors are reading richer. The only way I can think of to test this is to get your bike dynoed without the stage 1 mod and see what the AFR is.

Assuming it is indeed out of the closed loop's correction range, this makes sense, although the open loop areas would be even leaner than stock.

You'd also get the open loop areas back to stock AFR (or close to it) due to the download. So basically you'd have close to the same AFRs as a stock bike with the IEDs.

Agreed. It adds fuel to match up with the increased air flow. More air plus more fuel means more power.

Again, I agree.

Can't say I know more than anyone else, but you're thinking is spot on IMHO.

 

I have a 08 Ultra with Stage 1 download,SE air cleaner,V&H Fuel Pak,True Duals w/0vals.The bike runs well,not hot like it did when I picked her up new.I will be installing a set of the Nightrider IEDs later this week.I want to see if the help in the Az summer heat.I fugure it won't hurt for $69.Thanks to all that helped research this issue.Regards,Tom pso the download for the SE Air Cleaner.A good dealer will not charge labor for the flash,it takes less than 5minutes.