This is just an FYI for those sitting on the sidelines contemplating a fuel mgmt system. I've told the story before of the differences between my buddies bike and mine. Both 07 RKC's, his with Rush and mine with V& H slip on's. Both stage one with filters. The difference is that I put a PCIII on from day one. I've tried to evalute the bikes from day one to try and tell the differences. I've never really noticed much difference in performance but we don't like get out race. I have noticed that his bike always seems hotter, much hotter in fact. Well we both just went to V & H true duals. Thats the back ground now to the point of the story.

When we put his on the first thing I noticed was on the attachment clamp for the rear cylinder. His had absolutely been baked to the point of being brittle. When we took it off the flange broke it was so brittle. Now remember this is a metal piece that has been baked to the point of being brittle, like it was pulled out of a hot fire that had burned for days. It even had that look to it. After replacing it and putting the duals on, his didn't sound right, no back pressure and it was too loud. Since he had the Rush he thought he might want to get a different size baffle. He bought the 1.75 and 1.50 and some new packing. He had the 2.0's in his since new.

When he pulled the baffles out he realized that his packing was completely burnt out, blackened to a crisp and or burnt to extintion. Long story short is that he started trying to change baffles and try different things with the baffles and packing. He tells me that everytime he changes and rides a few miles the packing had already started burning away. So I figure my packing must be totally shot and that mine probably needed to be repacked. I pulled my right side off last night as it was my primary with the factory headers and figured it would be toast, well to my surprise the packing looked like new, it still had its original gray color.

I'm putting this out there as I feel rather strongly about the possibility that these motors running as hot as my buddies does are not going to last the duration. I figure this might be valuable information for anyone out there unsure as to whether they want a fuel mgmt system. I'm not pumping the PCIII necessarily but I'm totally sold on the fact that at least the 07's almost must have one. Might be the most important accessory you put on your bike. Anyway, sorry to be so long here, hope this helps someone.

 

The new bikes need a fuel management system to run right.You know as soon as you install one.

 

I guess that is my point. I'm starting to think it needs one to survive though.

 

I have been singing that song myself, all '07's should have a fuel management system. I noticed the difference as soon as I installed my PCIII.

 

I did a heat comparison test on my 07FLHX with a DTT, RHTD`s and a SE-A/C. It was tested againstmy 08 FLHTCU stock.
The average tempeture difference at the rocker box was 200 lower on the FLHX. The highest recorded tempeture on the back head rocker box was 495 degrees.

 

I wouldn't run my bike without one. If my PCIII goes bad, I'll either park the bike or install the stock air cleaner until I can get it fixed or replaced with some other unit. I'm leaning toward a Tmax when I have the spare cash. For now I'll run the PCIII. Bike runs way cooler than stock with the combination of true duals and PCIII.

 

Please elaborate on what you mean by "Both stage one with filters." Are you saying you've got freer-breathing airboxes, replacement filter elements in the stock airboxes, did you have the "stage 1" ECU flash performed, etc.?

 

I have noticed those that have done some additional tuning or refining seem to run better and cooler.

 

Thanks for the info guys. PCIII is on my list and I think I need to bump it to the top of the list and get one soon.

 

These bike are running on the ragged edge of lean and very hot stock w/no changes. To change the mufflers only...you might get away with it. But, to change a/f and mufflers and NOT put on a fuel mgt system is insane and is damaging the engine which will not be covered by the warranty. When the tear down comes and they look at the pistons and valve train, the warranty will be voided as the damage will be apparent to anyone that has worked on engines that the engine was run overly lean for an extended period of time and that did the damage.

Tell your friend to pull it out and get a fuel management system before he grenades the engine.

If you don't believe me go to a dyno and have them put the sniffer on it. You are probably running 16 to 1 or leaner......that will damage the engine....the leaner it is the hotter it runs and the faster the damage will occur.

If you don't want to tune your bike with a fuel mgt system, then dont change the stock setup at all. Stock I wonder if the longevity will be there. My 07 was way too hot. The oil temps were running in the 277-290 range. That would translate to a head temp around 320 or worse. Not good for longevity. Put the SE a/k and mufflers and a fuel mgt kit on it and the oil temps dropped to 180-210 which should make the heads around 250-280 which is good.

Then added the TMAX and the power difference from that was night and day vs the fuel mgt/mufflers/TDs and air kit which told me the fuel mgt was set to lean also for best power.

I am happy now with how this bike runs and will keep this set up. Time will tell on the longevity vs stock set up.