Front cylinder low compression + blow-by in rocker cover + pushrod tubes

[panama86]

Losing my mind trying to figure this out, the stroke has got me baffled too. I measured again and I'm sure i was able to get a straight shot this time. Piston travel is definitely coming in at 3 13/16". As far as i am aware that's the stroke of 45". It's definitely not coming in at 3 1/2" which would be EL stroke and not 3 31/32". A straight shot measuring piston travel should give me exact stroke right? These are the exact flywheels that are in this motor before they were cleaned up.

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[Mongrel505558]

If those are the exact flywheels pictured then instead of measuring piston travel, measure the center-to-center dimension of the shaft and crankpin holes and multiply by two to get stroke.

[Andygears]

I’m thinking Panpal has it, the gear on the cam is pressed on wrong making all the events wrong despite the lineup of marks. Let’s have some closer pictures of that cam. You say it’s an “H”? I thought stock cams were one piece and that looks as if it has a separate gear.

Andygears

[Ratedspeed]

Panama,
I think we're on the right track here. Don't get overly concerned about the carbon buildup in the cylinder yet, I'm sure it's caused by the excessive overlap, the piston is pulling in exhaust on the intake stroke.
Hopefully Rubone will join in about the flywheels, I believe he has the most knowledge on the castng numbers and probably has some wheels laying around to match up.
I attached some photo's of a original "61" cam out of my '54
and a Andrews "A" grind so you can hopefully get an idea of the timiing mark to lobe configuration.
Mike

[panama86]

Andygears, i've attached some images below of the cam. It is stamped with a H but definitely has pressed on gear. As far as I know, both Andrews and S&S also made a cam with a H stamp. Looking at original harley stamped H cam used on ebay they do look different but the one I saw also appeared to have pressed on gear. This cam may be Andrews or S&S. The only reference point i have on the cam is the recess pictured. In the photo where the cam is lying down, that recess is orientated at 12 o clock. Looking at those flywheels again, they definitely have to be 61" or 74" as far as I am aware flatheads didn't have 150 40 castings. And they are definitely travelling further than 3 1/2". I'm tempted to pull the head off again to confirm for sure since i am already this far down and have a spare gasket here.

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[RooDog]

The only cams that I know of for OHV Big Twins that are one piece were for the Knuckleheads. The Pan and Shovel were pressed on. The cams are keyed for the manufacturing process, but the gears are not keyed and may be installed just about anywhere one wants to put it on the cam. They do not slip.
....RooDog....

[panama86]

Heres another one rated in similar position to the cam you posted. With the timing marks noted. It looks pretty close to be honest.

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[Ratedspeed]

The duration on the nose of the lobes appears greater then mine, can you measure the nose?

[RooDog]

There is 12 degrees difference between the front and rear intake cams on the FLH, Victory, cam, the front being 220* and the rear 232*, and both exhausts being listed as 244*.... All with .390" lift, Pan or Shovel? It doesn't say...

http://www.nightrider.com/biketech/down ... mSpecs.pdf

[panama86]

Rated, I measured the nose, i did this by running my finger up the ramp until i felt the curve change and mark it with a marker then measured that gap. Not super precise but might give some indication if yours is dramatically different. I can set it up with some V blocks and a dial indicator if need be.

In order of lobes from cam cover to cam bearing in case.

1. .88"
2. .88"
3. .72"
4. .78"

[panama86]

Also should mention tried to measure the lift by measuring the diameter of the cam off the ramp then at the highest point on the lobe and subtracted the base diameter from the highest point. Measurement was only roughly .275".

[Ratedspeed]

For comparison I'm just showing the rear intake ( closest to the case ) @ .780 it's 1/4" from the nose on both cams.
The base circle on the andrews is .998

[Ratedspeed]

As per your lift measurements:
"61" = .229
"A" grind = .295

[panama86]

So duration is about the same as what you've measured right? It looks like it may not be clocked incorrectly based on a comparison to your cam photos.

What do you think rated?

[Ratedspeed]

Do you have a caliper you can set at .780 and hold agaist the lobe to get a better visual. It appears your cam has too much duration.
There's too many "H" cam variations to get a grip on what your specs are, but it looks like it's for higher rpm's.