I just got a new set of Sifton Evader cams on EBay for $50. Now all I need to do is decide what to do with them. I have a '04 XL883 and have collected '04 1200 heads, barrels, stock pistons, rings, "W" cams, and a SE ignition module. I was all set to do a conversion, then I saw the cams. I tossed the $50 bid up for the hell of it and was shocked to find out I won. Is anyone familiar with this grind? I was thinking of tossing them in to see what happens. Any words of wisdom would be appreciated.

Intake Open 28 BTDC, Intake Close 44 ABDC, Exhaust Open 50 BBDC, Exhaust Close 22 ATDC, Intake Duration 252, Exhaust Duration 252, Overlap 50, Intake Lobe Center 98, Exhaust Lobe Center 104, Lobe Sep. Angle 101, Intake Lift 0.515, Exhaust Lift 0.515, Intake Lift TDC 0.2, Exhaust Lift TDC 0.18, RPM Low 3000, RPM High 6500

I didn't think they were making the Evader cam for 2004+ XL? Does your package have any fitment info on it? I thought they were 1991 - 2003, but I could be on the crack. :smoke

Those specs looks like they're from Sportster.org, so you've already done that homework ;)

--Chris

Right on both counts. I know that at least some cams for '03 sporties work just fine on '04's. I'm hoping that this is true for these as well. Unfortunately there doesn't seem to be a whole bunch of info available, or, at least, I haven't found it yet. The auction had so little time left on it that I didn't have a chance to do a lot of research. I figure for $50 bucks if I cant use them, someone else can.

True - at $50 that's a deal.

I don't know the difference between 1991-2003 cams and 2004+ cams. I know HD calls for different part numbers. Not sure what the physical difference is. Maybe Aaron or Dan from NRHS can help with that.

Also, never installed a set of those cams to know how they ran either :)

Good luck.

I don't know the difference between 1991-2003 cams and 2004+ cams. I know HD calls for different part numbers. Not sure what the physical difference is. Maybe Aaron or Dan from NRHS can help with that.



They will work fine in an '04-up bike....

My N4's are spec'd for up to an '03 bike, but work fine in my '04.

I believe the gear pitch for the oil pump was changed around '99 or so....as long as the cams fit an '03 bike, they will work in an '04 & up bike.

RedRider: thanks for the info. I wonder if in addition to the gear pitch change they made a while back, if there's something with the profiles and lift that would need to be different on aggressive cams for the thinner 7mm valve stems and beehive springs?

I don't know nothin' about the '04 up bikes :D

--Chris

All the '00-up bikes have the same pinion gear. The 04-up 883's use the same "D" cams as the 00-03 sportys. the 04-up 1200's use the same "W" cams as the 00-03 1200S. I've looked in the 2000 parts book and the 05 parts book to compare (Mines an '05:D ) and the cam sets and pinion gear are the same part #s.

Still trying to figure out why H-D lists different years for the SE cams. There is no good reason for it.

Are the 04+ ones more expensive... cuz theres a good reason right there.

I bet there is a GOOD reason for it. We just don't know it yet :D. I still suspect it has something to do with the lift and profile for the 7mm valves. In the NRHS catalog (page 8), they mention this:

* - Be careful about how aggressive of a cam lobe and how much spring pressure you put to OEM valves with 7mm stems. A big part of H-D's ability to get 7500rpm safely from these light duty components in the XB9 is the gentle profile of the stock XB cam lobes. We recommend converting to heavy duty Hurricane springs and Hurricane valves with 5/16" stems when using aggressive cam lobes.
from this page http://www.nrhsperformance.com/partsoemheads.shtml

So, I think that might be the reason there is a different SE cam for 2004+, but the same OEM part number for '03 and '04.

--Chris

I think it's one of those "sure it fits but you don't want to do that", at least with performance cams.

And to answer the cynics, both sets ('00-'03 and '04+) are $274.95 :D

--Chris

I bet there is a GOOD reason for it. We just don't know it yet :D. I still suspect it has something to do with the lift and profile for the 7mm valves. In the NRHS catalog (page 8), they mention this:


from this page http://www.nrhsperformance.com/partsoemheads.shtml

So, I think that might be the reason there is a different SE cam for 2004+, but the same OEM part number for '03 and '04.

--Chris

That's a good point, the valves stems are different. I was, however, under the impression that all the SE cams had mild profiles to them.

Cut and paste from NRHS:
"New for 2005 is the SE .575 lift cam set for XL's. Our testing has shown this to be an excellent grind for street performance use, with the potential for the same or more power across the rpm range as compared to the SE 536, but like the SE 536, it's valvetrain dynamics are good enough for an everyday street motor, without the need for excessively high spring pressures and the expensive supporting cast of valvetrain components that goes with it. See our Tech pages for more info."

So there is a little bit of conflicting info.:dunno

I wish NRHS would pipe up :) Too bad they're getting ready for their July 4th bash.

--Chris

They do specifically mention "valve train dynamics" - just because the lift is high doesn't mean it's an aggressive profile. The profile has a lot to do with it. The cams can have nearly identical lift and duration but totally different effects on the valve train. Anyone who has ever run a Leinweber cam knows exactly what I mean.

--Chris

Shifton evaders were a fairly mild cam with numbers close to andrews N4/V4some of the numbers you may need if you didn't get them with the cams are:

Intake open: 28 close 44
exhaust Open 50 close 22
TDC Lift I 0.2 E 0.18
Total lift is .515

I would think that IF they will match up to the pinion gear, they should bolt in but as always, it is a really good idea to check.

Ghugly wrote to me directly and I answered him there but I see others are also curious. The cams he has will work in his 04 but they have the course pitch teeth so he needs a different pinion gear. Not a big deal, we sell them for $105. So for $155 he got a really good deal on a nice set of cams which will work nicely with the 04 1200 heads.

Now the SE 575 lift cams WILL NOT work with stock heads. Too much lift for the springs and the 7mm valve stems. They need bigger springs and 5/16 valve stems like what comes with our stage 2 headwork. You also get bigger valves with stage 2 to take advantage of the bigger cams.

Just to clarify, in my last post, I was mainly talking about the 536 cams not the 575s. I re-read my post and it was a little unclear.