HarleyTechTalk

yes i read the 10 page thread '21 vs 26' that was linked in the '21vs26vs204' thread.  But none really talked about going in a 103". Particularly a 103" Bagger.  Do these cams perform as well in a 103" with mild headwork?   Thanks

With the advent of the 48H for 07 & later models I would not consider the 21. The 48 has an intake closing of 29 degrees and the 21 is at 30 degrees, however the 48 has .050 more lift than the 21. With this being said Andrews recommends the 48 in 96's and the 54 in 103's. I would probably still use the 48 though myself if I had the choice. 

I'd stay away from the 21.........

thanks, leaning towards the 26 or 204 anyways...  little more towards the 204

Quote from: boooby1744 on October 14, 2010, 01:09:19 AM
I'd stay away from the 21.........

Could you quantify that please?

 

I've been running a TW55 in my 103, with headwork,  evo industries setup, 2-1 etc.....no one leaves me in the dust.  The 48h might make a little difference would be my choice of the cams you listed have 33,000 miles on my bike with this setup all is well.  The headwork was done by Jon Sachs, pistons Kury
TP RRockers, SS breather valve, TW 55 cams and every 2-1 exhaust you can think of, right now Fatcat but going back to my Trapp with 14 and open end cap.

I have the 54 w/.030 head gasket and stock heads.  It runs great. This bike is for traveling mostly. Good torque through out with plenty power in upper rpm's

Quote from: 7hogs on October 14, 2010, 06:47:54 PM
I have the 54 w/.030 head gasket and stock heads.  It runs great. This bike is for traveling mostly. Good torque through out with plenty power in upper rpm's

54 in the 103 is a good match...easy on the starter, quiet along with good street manors, nice flat Tq curve.

 

I also have the Andrews 54 in a 103 with .030 head gasket and stock heads in a 07 StreetGlide. Pistons advertised as forged 10:1 pistons. 92 hp and 107 ft/lbs of torque. I consider it a great bolt in cam for engines with the newer heads. Why would you choose a cam that does not take advantage of some or all of the extra lift that the newer heads and springs can use?

Also looking at the new SE catalog. HD now has a SE254 cam. Advertised as midrange cam, almost as much low end torque as the 255 but the 254 is supposed to pull away from a 255 in upper rpm assuming everything else is the same. Interesting statement. Curious about how it actually works if anybody ever buys one.

Quote from: R.Bingham on October 13, 2010, 08:27:29 PM
With the advent of the 48H for 07 & later models I would not consider the 21. The 48 has an intake closing of 29 degrees and the 21 is at 30 degrees, however the 48 has .050 more lift than the 21. With this being said Andrews recommends the 48 in 96's and the 54 in 103's. I would probably still use the 48 though myself if I had the choice.

Wow, someone actually providing technical reasons why one cam may work better than another, versus stating something like "It's a great cam, my friend runs it and he says nothing but good things about it." or says "I'd Stay away from the TW21." 

How about the 54 in a 106

Sorry Alien, I just had to

Quote from: machinist on October 14, 2010, 03:37:29 PM

It'll ping on a hard pull from about 3300-3800.you can probably tune it out,but it just ain't worth it with all the good cams out there.

If I had a basically stock 88" in a bagger I would use the 21H. Great low end torque where most bagger riders ride. But, that said, I put a 26H in my 07 96" Street Glide and never looked back. I run the CVO 110" 4" can mufflers, as they flow better than stock mufflers and are quiet. I like to listen to my music and as I got older I started to hate loud exhaust.

I run the K&N stock replacement AC and a Cobra "piggy back" 49 state tuner. The cams woke the motor up and from 2800 RPM to red line it pulls much harder than the stock cams. The tuner made a huge difference in the way the motor ran from stock also. I know the Cobra tuner is not as good as a "Real" tuner, but for the money and simplicity, it worked much better than the stock set up with a stage one download. JMO

As far as how the 26 would do in a 103" I could not tell ya. I don't own one, yet. When the time comes I will most likely go to a 107".

Funny- i just had a conversation yesterday and #*#*# from Andrews tech support said the 26 in a 107 with low compression is what he would do...   funny,  but true story

Yea I talked with the Tech guy from Andrews also. I'm not sure how "Technical" they are.

agreed.   I guess I should've added that he wasn't choosing 107 over a 103, the conversation switched to 107 and his choice for that was the 26 (touring)

Why would anyone choose the 26 for anything larger the a 95 or 96?

IMO yea you can get the CR low enough to use the 26 in a 103 if you work at it...you can also pick fly chit out of a paper bag with boxing gloves on, either will work but neither is very effective 

Hope that was technical enough for ya's 

There is a 106" TW-21 EG running around here. It pulls real good up to 4k. The rider has no complaints about how much and where the power is, and he has no plans to change.

Once in 5th gear he down shifts only if the bike is comming to a complete stop....for him it works perfectly.

Sounds like the garden tractor I got.. It's got a Gannon box scraper on it,, it basically has 6 forward speeds and when you start off,you start off in any of the 6 speeds you want.. It's not vary fast though... Max

I'd bet it's fast enough to get into all kinds of trouble with on the street.  It is a street bike, right, and not something run even primarily on the track?

Quote from: PanHeadRed on October 18, 2010, 05:09:47 AM
There is a 106" TW-21 EG running around here. It pulls real good up to 4k. The rider has no complaints about how much and where the power is, and he has no plans to change.

Once in 5th gear he down shifts only if the bike is comming to a complete stop....for him it works perfectly.

I heard he had like 122 ft lbs TQ at 2500 rpms

That'd be perfect for a bike actually used on the road.

Quote from: glens on October 18, 2010, 02:45:27 PM
That'd be perfect for a bike actually used on the road.

The 106" / TW21 bagger is used as a long haul tourer.

just something to think about.When you increase an engines size 88-95 96-103 you automatically pickup more tork. The 88 & 96 engines have about the same horsepower in their stock form but the 96 has more tork just check any legit dyno charts. yea I know the 96 has a little more hp but not worth arguing about. my point is you can use a bigger cam [more duration] on a larger motor without losing a significant amount of bottom end tork. Due to the larger displacement. I would never use a 21 on a 96 or 103 what a waste! A 96 already has 80lbs stock Put some 37's or some other grind with a simaliar duration and get a big bump in HP & tork just my opinion please feel free to trash me if i'm wrong hell i might even learn something