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I have got a little bored with the one cam that was in the Fatboy.. it was a great can for mid-range and high RPM and was pretty decent on the low end but I miss my experimental cam.. So I put it back in today and I lowered it off to Jack pulled the jack out and this is what I see on the ground...
Just my luck It was a lower pushrod tube o-ring so I had to take them all back part to see which one it was and it turned out to be the rear intake.. So I had to set everything up again relieve the push rod put the o-ring in and put it back together... Always something...
I will say though the bike start it up beautifully...
Time to go have some fun...
Last edited by 98hotrodfatboy; May 14, 2024 at 01:05 PM.
Had similar last week working on the truck. Turns out it was a washer from the jack. Drove me nuts for a little while. Till I found the cotter pin then the light bulb went off.
Tell us more about what cam you removed and a few details on the "experimental" cam. Or is it top secret area 51 stuff and can't talk about without a proper clearance?
Couple years ago I had a 3Sun MarsEB2112A cam installed.. A friend of mine Johnjzjz, you all know him from the forum here, who repaired the Crank for me was looking for an older Crane 312h cam but couldn't find one so the next best was the 3Sun.. It's a longer duration cam with a little less lift than what I've been using.. It performed very well and had very good street manors.. But I was just getting tired of it and needed a little change.. So I reinstalled this Woods cam that I had ground by Bob Wood..
I took the platform off the Woods 8 cam and changed the timing of the valves a little in an attempt to make a cam that would have good low end and carry out without a lot of duration..
The Woods 8 is as follows
19-47/49-17
Woods W8 has an Overlap of 36.00 degrees and has in Intake Duration of 246.00 degrees. The Exhaust Duration is 246.00 degrees. The Lobe Separation Angle is 105.00 degrees. The Inlet Cam has an Installed Centerline of 104.00 degrees ATDC. The exhaust cam has an Installed Centerline of 106.00 degrees BTDC.
Woods W8 cam that I modified has an IVO-IVC and EVO-EVC of
21-43/49-19 and Bob Wood labeled it as a W6EXP and
has an Overlap of 40.00 degrees and has in Intake Duration of 244.00 degrees. The Exhaust Duration is 248.00 degrees. The Lobe Separation Angle is 103.00 degrees. The Inlet Cam has an Installed Centerline of 101.00 degrees ATDC. The exhaust cam has an Installed Centerline of 105.00 degrees BTDC.
My static compression was 11.16:1 for the 43°IVC.. I love compression, it's what is really needed to drive a cam...
It really is a very versatile cam.. I had a dyno tune a few years ago and had issues after 5200 rpm, it kinda fell on it's face.. At first I thought it was reversion but after doing some research and what a couple of the guys on here had mentioned it definitely appeared to be weak valve springs.. I'm pretty sure @Max Headflow nailed on the valve springs only because In the video I made, it actually showed fuel stand off at the carb (fogging) which is known to be caused by floating valves..
Needless to say I really like the cam and it was ground pre COVID for $460.. Not sure what a special grind today would go for but it really is the most fun cam I've ever had..
I took it out for a little test ride it and man just as I always remembered it, it just keeps pulling hard and doesn't want to stop.. I really do love this cam...
Last edited by 98hotrodfatboy; May 14, 2024 at 05:12 PM.
Not sure what I said.. Those brain cells are long gone.. You can get fuel standoff with good springs.. One of the reasons why I like longer velocity stacks compared to short ones like the ones on the SnS air cleaner.. I'd bet your better top end is from the bigger intake valves.
Add:
My mistake the bigger valve went into the TC.
Last edited by Max Headflow; May 14, 2024 at 07:10 PM.
A little more research on the fuel stand off.. Most likely the cam.. I'll have to check my high rpm logging with my WEGO to see if it's running lean up there..
Id missed four that go in the spring assembly held within the pushrod tube covers. You better believe I was pissed when I realised I had to remove each of those freshly installed / adjusted rods.
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