Degreeing question

[ledslinger29]

With the -8 degree keyway being used, and using the .050 over under max lift method, the intake lobe maxes out a little above 109.

The .050" opening and closing readings you took earlier showed the intake lobe center at 109.25* ATDC which seems to be verified by the max lift reading you just took.
You cannot get any closer with what you have and as pointed out earlier with chain stretch it will be right on.
I would call it good.

This makes sense to me the only thing that has me confused is why I'm having to use the -8 degree keyway.

 

[pmuller9]

The .050" opening and closing readings you took earlier showed the intake lobe center at 109.25* ATDC which seems to be verified by the max lift reading you just took.
You cannot get any closer with what you have and as pointed out earlier with chain stretch it will be right on.
I would call it good.

This makes sense to me the only thing that has me confused is why I'm having to use the -8 degree keyway.

It happens. I had Jones cams grind a cam for a .450" lift racing class.
Lobe durations, Separation angles and lifts were spot on.
The indexing was far enough off to where I had to skip a gear tooth and use the +8 keyway.
Most of the time cams will be indexed within 4 degrees from where they need to be.

If you want to take the time, set up on cylinder #6 and see if you get the same readings.

 

[Econoline]

Yeah, I was referring to the cam gear, it's 14 degrees per tooth @ the cam iirc, /2 = 7 degrees @ the crank. Using the intake centerline method you zero out the dial indicator @ max lift, then take degree readings @ .050" on either side of zero, add together the numbers and divide by 2 to get the intake centerline.

 

[ledslinger29]

I spoke to Schneider today and we went through all my numbers together, the .050 over under on the intake lobe lift coming in at 109.25, and he came up with the same numbers I did.
I will definitely set up on #6 and see what i come up with, I still don't have my head back, and with me being in no rush it would certainly be a worthwhile check since something is in question

 

[drag-200stang]

I spoke to Schneider today and we went through all my numbers together, the .050 over under on the intake lobe lift coming in at 109.25, and he came up with the same numbers I did.
I will definitely set up on #6 and see what i come up with, I still don't have my head back, and with me being in no rush it would certainly be a worthwhile check since something is in question

Checking everything is always worth while....At this point in time I see nothing out of the ordinary.
What is in question?

 

[ledslinger29]

I spoke to Schneider today and we went through all my numbers together, the .050 over under on the intake lobe lift coming in at 109.25, and he came up with the same numbers I did.
I will definitely set up on #6 and see what i come up with, I still don't have my head back, and with me being in no rush it would certainly be a worthwhile check since something is in question

Checking everything is always worth while....At this point in time I see nothing out of the ordinary.
What is in question?

The only thing remaining in question is why I'm having to use the -8 degree keyway on the crank gear.

 

[drag-200stang]

I spoke to Schneider today and we went through all my numbers together, the .050 over under on the intake lobe lift coming in at 109.25, and he came up with the same numbers I did.
I will definitely set up on #6 and see what i come up with, I still don't have my head back, and with me being in no rush it would certainly be a worthwhile check since something is in question

Checking everything is always worth while....At this point in time I see nothing out of the ordinary.
What is in question?

The only thing remaining in question is why I'm having to use the -8 degree keyway on the crank gear.

This is normal with these engines do not worry about it...Now when you check the rest of the lobes and they are jacked, then I would be concerned...I would expect a little variance...The number on the sprocket means nothing, what maters is that you degree it, and now you see why you must always degree.

 

[Econoline]

I'm sorry for any misleading information I've posted here, my cam timing gear has 42 teeth, which is 8.5 degrees per tooth, 17 degrees @ the crank? It makes my head hurt to think about it. 1 degree @ the crank is a 1/2 degree at the cam. I don't know where I came up with 14 degrees and I mixed up the ratio. I still think either ledslingers timing set is not marked or indexed right or the cam is off. If it's otherwise ground ok, wtf. But if it's not being degree'd right and put in 8 under or out to lunch that would suck. They have keyways and dots for a reason. You shouldn't have to be an engineer to put one in. Mine came in on the dots. But like was said, chains stretch and being 3 degrees advanced vs the 2 ground into the cam probably isn't a bad thing. But it relies on you reading it right.