Cams question
Cruiser
Joined: Nov 2009
Posts: 179
Likes: 0
From: Texas
Phonecall to friend reveals the following:
Flywheels aren't S&S. Markings on the side is "exl 4 5/8 1400"
center reads truett osborne wichita kansas.
Pistons are s&s 92-3702f forged piston assembly for use with 4 5/8 stroke in 1972 -1985 sportsters.
Jugs have a /, triangle and an F marking, I assume that the company's initials are AF
Flywheels aren't S&S. Markings on the side is "exl 4 5/8 1400"
center reads truett osborne wichita kansas.
Pistons are s&s 92-3702f forged piston assembly for use with 4 5/8 stroke in 1972 -1985 sportsters.
Jugs have a /, triangle and an F marking, I assume that the company's initials are AF
then,maybe a set of wheelie bars! keeping that front wheel on the pavement might be a bit tough..i bet Gunnuts droolin!
Last edited by 70Weight; Feb 6, 2010 at 12:23 PM.
Cruiser
Joined: Oct 2008
Posts: 121
Likes: 1
OK, here is some "very old information" back in the days of bored/stroked Sportsters (about "70" ish), Stock HD rods were considered to be strong enough for even Fuel drag Bikes (40% mix). We did polish the sides of the rods to reduce stress risers and liquid penetrant inspect them for cracks.Saw some failures but not because of rods! By the way, about this time you could get a set of 5 inch stroke flywheels from S&S. Also, it is very complicated job to get rod clearance in the cases (NOT), you use a hacksaw! By about "72-73" the fuel guys were taking "883" inch motors to 110 Cu. In. by weld building up the top of the cases and boring them for even bigger cylinders!
Road Master
Joined: Aug 2006
Posts: 751
Likes: 6
From: 500 miles south from Artic Circle
If you are building pure RACE bike you can use those cams, otherwise I personally recom factory P-cams or PB+ cams...much more nice to drive chopper when you have torque in lower end.
Thread Starter
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Tourer
Joined: Aug 2009
Posts: 426
Likes: 0
These are the specs, guy says they compare to "Y" andrews cams.
intake opens 33 closes 54 - exhaust opens 52 closes 25 - lift is .410 intake - .436 exhaust -
intake opens 33 closes 54 - exhaust opens 52 closes 25 - lift is .410 intake - .436 exhaust -
Here's a link to the Andrews WebSite page for their IronHead Sportster cams, if you want to compare for yourself ...
http://www.andrewsproducts.com/motor...SC_Cams_IH.htm
http://www.andrewsproducts.com/motor...SC_Cams_IH.htm
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Cruiser
Joined: Feb 2008
Posts: 118
Likes: 0
From: Athens, GA
EvilWayz,
Which Sifton grind are they? New or vintage?
Edit: The grind and specs should be stamped on the cam gear surface. They sound like Titans (Minus Minus). Intake lift is different however.
http://victorylibrary.com/tech/XLcam-c.htm
Which Sifton grind are they? New or vintage?
Edit: The grind and specs should be stamped on the cam gear surface. They sound like Titans (Minus Minus). Intake lift is different however.
http://victorylibrary.com/tech/XLcam-c.htm
Last edited by GA Ironhead; Feb 13, 2010 at 12:37 PM.
