fuel injector changes on 06s
Road Master
Joined: Nov 2005
Posts: 1,055
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From: The birthplace of our nation- Philadelphia proud!
RE: fuel injector changes on 06s
ORIGINAL: phreak
Never leave the dealership without your take-offs.
Never leave the dealership without your take-offs.
I was reading under the other models where some guys got the CVO injectors installed. Are the 25's the CVO's? If so, people are reporting some good news.
Cobra, you're hitting the nail on the head. What the he11 is the difference between the two injectors? Any Harley wrenches out there care to comment or PM me?
Road Master
Joined: Feb 2006
Posts: 1,072
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From: I been around
RE: fuel injector changes on 06s
I'm betting the angle difference is not so much an up or down difference as it is a spread difference. 8° of spread making phor a tighter stream then the 25° of spread. Granted 17° doesn't seem like much, but it will allow phor a slight gain in vaporization, making phor a more optimal usage of the phuel.
Road Captain
Joined: Oct 2005
Posts: 631
Likes: 6
From: Indiana
RE: fuel injector changes on 06s
ORIGINAL: Original Junior
Cobra, you're hitting the nail on the head. What the he11 is the difference between the two injectors?
Cobra, you're hitting the nail on the head. What the he11 is the difference between the two injectors?
My best guess is that the difference between the injectors is just the spray angle/pattern. I highly doubt that they are bigger injectors. They say that the injectors are 8 degree and 25 degree, not that they are 8 pound (#) and 25 pound (#). If they were a different pound injector then they would be larger. HD doesn't say they are different pound, just different degree.
So basically what I am saying is that I don't believe these injectors are being put in for more fuel or to richen up the mixture. I think that the difference is just in the spray pattern and that the pattern must help certain bikes under certain conditions; just like Phreak said.
Now, having said all of that I'll probably most likely get the swap done anyways at some point. HD wouldn't be making the swap in all Big Twins from this point forward if it didn't in some likelyhood help cover a broader range of the afore mentioned "certain conditions". The thing is at this current point I have zero issues, none of the issues mentioned at all. However I still have yet to ride in hot weather since I've had the bike because I got it in the Fall. So who knows if some of these issues might come up in hot weather, it's yet to be determined.
Tourer
Joined: Jan 2006
Posts: 340
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From:
RE: fuel injector changes on 06s
they are the same inj. used on the 103inch motor they have to be larger IMO 25deg. cone is going to provide beeter atomazation .they are going to be beter for any perf. mods .the guys with usbs dfos and such are going to have to recalabrate.im sure that the new down load will shorten the duty cycle to stay within the epa crap. I do think it will be a big impovment for any 06 bike
Banned
Joined: May 2005
Posts: 14,496
Likes: 156
From:
RE: fuel injector changes on 06s
So basically what I am saying is that I don't believe these injectors are being put in for more fuel or to richen up the mixture. I think that the difference is just in the spray pattern and that the pattern must help certain bikes under certain conditions;
What is the purpose of the new download then using this theory, still the same fuel pressure 39-45 lbs.( higher pressure = more fuel with the same pulse width) and without altering the fuel map with the download, the mixture would remain pretty much the same , only the pattern would vary....Hmmmmm...
Cruiser
Joined: Oct 2005
Posts: 111
Likes: 3
From: Middle of the USA
RE: fuel injector changes on 06s
Spoke to my dealer tuner. He said if I thought I needed them they would install them. He all so said that the factory tec advised him the only change was the spray pattern, and no more fuel is added and that the pattern of the fuel is the reason for the ecu map. It will stay under the EPA reg’s. For me my bike is running fine with the powercomander and dyno tuning. Guess I will leave it alone for now, and see that the tuner thinks after he has done a few.
Road Captain
Joined: Oct 2005
Posts: 631
Likes: 6
From: Indiana
RE: fuel injector changes on 06s
ORIGINAL: RWP
He all so said that the factory tec advised him the only change was the spray pattern, and no more fuel is added and that the pattern of the fuel is the reason for the ecu map. It will stay under the EPA reg’s.
He all so said that the factory tec advised him the only change was the spray pattern, and no more fuel is added and that the pattern of the fuel is the reason for the ecu map. It will stay under the EPA reg’s.
Outstanding HDF Member
Joined: Feb 2006
Posts: 2,958
Likes: 1
From: West Tennessee
RE: fuel injector changes on 06s
It would be interesting to see the two different injectors tested one after the other in an extensive dyno tuning session on the same bike.
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Road Master
Joined: Sep 2005
Posts: 858
Likes: 1
From: Upstate NY / San Clemente CA
RE: fuel injector changes on 06s
Awe for cripes sake,....now I dont know what to do. My bike runs fine, but I have the stock A/C back on with the D/L and Slip ons. I was haveing symptoms, but only with the SE A/C. Should I say tahell with it, and keep my current set up since she is running fine, and hope when it warms up it will still be good....or should I have the new injectors put in.
I must be over thinking this but here it goes........If the 25 degree injectors spit the same amount of fuel, but the angle combined with more holes causes the fuel to atomize more, wouldnt it actually run leaner? Since the fuel would burn more efficiently?? My friggin head hurts.....bike is running fine...think i will just go for a ride and think about it later???
I must be over thinking this but here it goes........If the 25 degree injectors spit the same amount of fuel, but the angle combined with more holes causes the fuel to atomize more, wouldnt it actually run leaner? Since the fuel would burn more efficiently?? My friggin head hurts.....bike is running fine...think i will just go for a ride and think about it later???
Road Master
Joined: Sep 2005
Posts: 858
Likes: 1
From: Upstate NY / San Clemente CA
RE: fuel injector changes on 06s
ORIGINAL: Original Junior
Yes, I was pondering the same notion. What if I get these injectors and down the road find out I was better off with the original ones. And then, the "old" style we have now is obsolete and can't be had. Here's something to sit on the toilet and think about, EPA crap is all around us, HD is stopping the sale (and some dealers stopped the installation of) their slip ons, and I'm sure more go fast goodies to come. I doubt the MoCo would stop the SE slip ons under it's own accord. It's a profit stream that just dried up on them! What if these injectors are some how tied to the new EPA constraints. Maybe the grass isn't greener on the other side. I hate to have the injectors switched just to find out that the old ones are built better to handle power upgrades or something of the sort. I don't know. I'm just throwing crap out there to think about.
Yes, I was pondering the same notion. What if I get these injectors and down the road find out I was better off with the original ones. And then, the "old" style we have now is obsolete and can't be had. Here's something to sit on the toilet and think about, EPA crap is all around us, HD is stopping the sale (and some dealers stopped the installation of) their slip ons, and I'm sure more go fast goodies to come. I doubt the MoCo would stop the SE slip ons under it's own accord. It's a profit stream that just dried up on them! What if these injectors are some how tied to the new EPA constraints. Maybe the grass isn't greener on the other side. I hate to have the injectors switched just to find out that the old ones are built better to handle power upgrades or something of the sort. I don't know. I'm just throwing crap out there to think about.