SE 255 which comes in the 103 stage 2, street legal kit is .550 lift. 07/08 heads can take that lift without modification. .005 higher probably won't make a difference. Key word on compression "up to 10:1" lower is ok, higher not to good.


By the way Etrader, thats a real nice looking SE Ultra in your sig.

SB

 

Are you doing the work yourself?

Call up HQ or any speed shop for that matter and ask them. If your doing the work yourself it is worth the $ to just do the cams. I think you'll be surprised at the change in character.


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When I first bought the '07 a cam upgrade was high on my list, but my enthusiasm waned after finding almost no info and what little existed were underwhelming. I saw two charts with Andrews 26 cams, which really light up a TC88/95, but in a 96" the results showed barely any improvement over stock. The charts I saw for SE 255's produced good HP and TQ, but the TQ came in too high for my taste. I want the TQ peak no higher than stock, which is around 3200, and want it strong from 2-5k. For example, the stock cam with Fuel Moto's custom Rush kit with PCIII map gives TQ above 90 from 2600-4300 and above 80 from 2000-5300, peaking at 94 between 3100 and 3700 RPM's. I consider these to be strong numbers, and for that reason I've put a cam change on the back burner.

I've seen at least one chart on the TW6, but its TQ peak was also too high. Again, this is my preference, and YMMV--but I feel a touring bike should be cammed for best low-end grunt, as it will likely never be used to compete on the dragstrip. Jamie at Fuel Moto may try some cam experiments on his '07 RK next Spring, and I told him to keep me informed if he runs across anything interesting. I think the cam mfrs. will be producing 96-specific cams in the near future, if they haven't started already, and it's just a matter of time. In the meantime I'm very happy with the performance of this setup and may never do a cam upgrade.

 

http://groups.msn.com/harleytechtalk...59352534940643 I think we have a clear winner!

My first thought was the TW6 based on suggestions from some folks with many more 'smarts' than I have, but then the 'committee' in my head starts yapping and the confusion sets in! The dyno on it looks good and I can play around with the exhaust if I end up with a big dip in the tq. I can do the work, long as one of my more serious wrench buds has time to 'babysit' me, I'm more of an Evo/Carb guy and it's been quite a few years since I've done much wrenching. Need someone to smack my hand when it gets in the wrong place!

Next, gears vs chain? How good is the roller chain setup? Any one had probs with it? Appreciate all the feedback, thanks guys

 

I did exactly what you are talking about.

https://www.hdforums.com/m_2825599/tm.htm

 

The roller chain setup on the 07-8's appears to have fixed the cam chain tensioner wear issues. I just rebuilt to a 120 at 12k miles and the shoes were like new so I left them in and stayed with the chain.

 

Dumped the chain for gears on my '06 & '08.

 

I think the jury is still out on the durability of the shoe material since it is still sort of new. That being said, Andrews has engineered retrofit cams to use the new system in older TC engines, so at least they must believe that its pretty good. There does seem to be agreement that the new roller chain system is much better than the old silent chain. HD does have a billet cam support plate that has brass bushings instead of the standard "parent material" bushing. I think that would be a must on any performance hop up. The thing with the gear drive system is that if your crank has too much run out, there will be problems. Since HD just increased the run out spec, it appears that that could be an issue. I believe that the chain system is much easier to install as well since the gears don't have to be pressed onto the cam and the cam into the plate. Crank run out would not be a factor in the chain system.

SB

 

I used the stock tensioners.

I have no idea what the peak HP & TQ numbers are on my bike nor do I care.

Does anyone really ride there?

I don't.

My bike runs like a raped ape or scalded dog, or what ever other example you use in the RPM range I usually ride.

That is 1000 to 4000.

It is one pulling SOB.

By the way Wood was in my top three.

After that it's all cruising.

Just because it can't be said enough, Thanks Philm and Dalton.

 

That blue run is very impressive indeed, and holding 100 ft/lbs from 2500-4300 is excellent even though the peak is at 3500. It's a very nice, flat TQ curve, and for a touring bike I prefer it to the peakier red run, not to mention the cost factor of that upgrade. If accurate this blue run would be a meaningful upgrade over the stock cams. The last TW6 chart I saw wasn't this impressive. Now, if I could just talk Jamie at Fuel Moto into installing TW6's in his '07 RK for some experimental runs with his custom Rush setup. That would result in a PCIII map and a resurrection of my interest in a cam upgrade.

As for gears vs. chain, I would stick with the chains. From what I've heard the new chain setup is superior to their predecessor, and going that route would be less expensive. If I thought there would be any issues resolved by gears I would of course select that option.