OEM cams
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Cruiser
Joined: Sep 2021
Posts: 109
Likes: 15
From: Beaumont
OEM cams
I will be breaking into the cam chest on my 2000 Springer as soon as I have all the replacement parts together. This bike has a six speed tranny, 40 mm CV carb with Screaming Eagle CNC ported heads which have been honed out twice to 113 ci. It has compression releases. It also has S&S tappets and S&S adjustable push rods. It currently has Screaming Eagle 266 cams. I don't know what kind of valve springs it has. The numbers I have seen is that these cams, which are no longer made, are about mid range when compared with today's performance cams . My mechanic believes that because of their high cam lobes, the SE266E cams may be making the constant noise. My plan is to go back to stock Harley cams (25534-99A and 25544-00A). I am 71 years old, and at my age, I am not looking for extra power or performance. Besides, with one foot in the grave, and the other on a banana peel, I only want my bike to go a little faster than my wheel chair. But the question is...do you all think this bike will accept the new cams without falling to pieces?
Last edited by carlmartine; Dec 5, 2021 at 02:15 AM.
Road Warrior
Joined: Jul 2014
Posts: 1,584
Likes: 520
From: VA
Not possible to answer without knowing the compression ratio. Do a compression test and see what the numbers are. That should tell you something. Guessing the stock cams won't work. But you have plenty of other options
HDF Community Team
Joined: Jun 2006
Posts: 12,763
Likes: 2,597
From: san antonio
So many sources for the noise, could be something else, like heavy springs, lifters, pushrod adjustment. I don't know if the 266 cams are known to be noisy.
Last edited by djl; Dec 5, 2021 at 01:16 PM.
Grand HDF Member
Joined: Sep 2017
Posts: 4,359
Likes: 1,219
From: Dubuque, IA
Highly unlikely it's the cams. Be an exercise in futility replacing them chasing a noise.
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Cruiser
Joined: Sep 2021
Posts: 109
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From: Beaumont
Thanks for the responses. First chance I get, I will have my mechanic do the compression test. Thus far, I have chased this elusive noise down, to no avail. New adjustable S$S pushrods, new S$S tappets, new Feuling oil pump, new Feuling cam plate, new Feuling hydraulic chain tensioners, new valves, new valve sleeves, Rocker Lockers, multiple oil changes. I gave this bike to my daughter on my death bed last year when I had the big one (she doesn't ride), but I am still kicking, so I may just have to live with it.
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Cruiser
Joined: Sep 2021
Posts: 109
Likes: 15
From: Beaumont
Compression numbers
One quick question...I understand that compression ratio and cylinder compression are two different things. What will each number tell me? I can do the compression myself test by renting the tool from an auto shop, but I have no clue about the ratio part.
Last edited by carlmartine; Dec 6, 2021 at 03:23 AM.
Grand HDF Member
Joined: Sep 2017
Posts: 4,359
Likes: 1,219
From: Dubuque, IA
The CR really doesn't matter at this point. It's used as a means to achieve an acceptable CCP when building an engine. It's the final CCP that matters. It's the result of the CR, cams used, ring seal, etc. A CCP between 180 and 220 is generally considered good. 180 might be a bit low and feel a little sluggish at low rpms and 220 will require a spot on tune or be prone to detonation at certain rpms. 190 to 210 would be best.
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Grand HDF Member
Joined: Jul 2007
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From: Bates County MO
Are you certain about the parts installed? A 113" would have 4.065 "bigger bore" cylinders x 4.375 stroker flywheel setup, weird to have a stock 40MM CV carb, and the HTCC CNC heads required a specific piston used to get the advertised CR. That kit was advertised @ 10.5 compression, and the SE266 cam has a 58° intake close, so CCP reading would be ~180#. If you put stock cams in that combo, your CCP would jump to ~205#, with potential detonation/heat issues.
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Cruiser
Joined: Sep 2021
Posts: 109
Likes: 15
From: Beaumont
Prior to the latest work, my bike was a 107 ci. It had SE CNC ported heads. (that is how I bought it) Afterwards, my mechanic, whom I trust and works exclusively on Harleys, made it a point to tell me several times that my bike was now a 113 ci. This work was necessary after a valve sleeve came loose and caused some damage. The heads had to be sent from California to Texas to have work done. I don't know if anything was done to the cylinders or pistons. When I bought the bike, it originally had a 45 mm Mikuni. I changed it to a 40 mm CV carb after the latest work.
Tourer
Joined: May 2006
Posts: 269
Likes: 100
From: Florida
IF you are interested I have a good set of Andrews TW-26 cams that are designed for increased low and mid-range torque which makes riding, especially 2-up, more enjoyable. $125 plus the ride. Fits twin cam engines up through 2006.