I have been trying to collect info on degreeing a cam with no cam card. So far I have read that it prob. will not happen accurately/consistently even if I were to map out the cam.

I have read that I can remove the cam and send it out to be professionally measured but Id rather not do this cause its not the cam I plan to run with in the long run. Only trying at this point to gain the experience with the cam.

I am sure that the cams are stock slant cams, one would be original for the 1983 engine it is in and the other would be a recent replacement for the 1986 engine it resides within.

I have read that the cam may be marked with manufacturer and even possibly a # that I can use to get the cam specs from manufacturer.

Can anyone tell me if these cams are indeed marked in some way with an identifying # and where I might find it?

Thanks

The marks will be on the nose of the cam where the cam gear will install...it can be as simple as some letters and a number, some may include the grind number, some the two duration numbers with a slash to separate them...I have seen comp cams marked on both ends...If it's a replacement melling it might be stamped near the gear "peg"...

Thanks for the info, will check it out, if you are aware of the specs for a stock hydraulic 225 cam anywhere please let me know.

My understanding is that the cams were identical 81-87.

my stock 83 D150 cam was

IVO 6
IVC 42
EVO 36
EVC 12
overlap 18
LSA 105
Intake center 108
Exhaust center 102
I & E duration 228

and here is a post with details on how to work these cam numbers
http://www.slantsix.org/forum/viewtopic ... highlight=

I also have the 86 FSM and had looked for these #S but were un-able to find them until now. My manual gives the same information as you have given above.

Thanks for the help.

Thanks, did you do any basic write-ups that detailed step by step procedures for arriving at these #s within your own 1983 engine?

Did you find the cam #s to be accurate as installed in your engine?

How did you measure......I have been told not to use a hydraulic lifter but instead find a solid lifter to use for my measuring, I am guessing that a hydraulic lifter may collapse, would be difficult to perch a dial indicator on that small ledge way down inside a slant six engine.

I have also been told to remove the stock valve springs on #1 cylinder and install some sort of weaker spring that I would need to purchase just to do my measuring?

I have been told alot of things and some are conflicting, I am realizing that I have never done this before, no sure why I even own a degree wheel at this point, thought I would remember doing all of this but I am wrong.

I am watching you-tube videos, cant find anything for the slant six or anything that goes step by step, I have seen the info in the faq section here and I do not have easy access to a lathe to make a tool in place of the lifter and still many questions not answered for me.

Everything helps to put together what I need to know but at this point what I have read or seen on-line is still not quite enough enough to give me the confidence I need.

Can you give me a step by step in this thread, it prob. still will not answer all my questions ( cause I am thick skulled ) but I am sure it will still be a big help.

I would appreciate the help.

for cam degreeing this comp cam article goes through the intake centerline method...has other good info also

http://www.compcams.com/technical/instr ... es/145.pdf

this Isky Cam method uses the .050 valve rise method and it also has a bunch of great cam info

http://www.iskycams.com/degreeing.php

when I degreed the cam in my 83 D150,, i checked it both ways,
the reground cam from Oregon was right in line with the cam card that was supplied by them,,

you can buy test springs from Summitt,, those are normally used when flow testing a cylinder head,, I degreed my cam with the head off,,
made finding TDC a lot easier,, have an error at TDC and the cam degree work will include that error
see this article
http://www.slantsix.org/forum/viewtopic ... highlight=

in that post, folks on this forum walk one through the process and calculations to turn the FSM info into cam clocking ( advance-retard)...

Thanks, I will check these out better

Can you tell me what the BTC, ABC and ATC are referring to and how to use them when degreeing my cam.

I am going to assume that....

BTC = Before Top Center

ABC = After Bottom Center

ATC = After Top Center

But I do not know how any of this fits into the procedure

slant six degree info available on this forum

http://www.slantsix.org/forum/viewtopic ... sc&start=0

same poster,lots of photos
http://www.slantsix.org/forum/viewtopic ... highlight=

if this does not help you out,,why not post your location and perhaps there is a fellow slant six guy in the area that will stop by your place and in an act of friendship, walk you through the cam degree process,
If not, hire a local machine /engine shop person to walk you through the process,, hands on,,your shop or theirs.

Everything helps. I had read the first topic but had not seen the second one. I am in Brandon Florida. There is no fellow slanter locally that I am aware of that has either the time or interest so I will continue gathering information as I am doing now until I get to the point where I am confident to tackle the job.

As mentioned in that second article a write-up tackling all of this step by step is needed and considering that post was made in 2011 Id say its time someone stepped up to the plate and did it.

I am sure I could do a good job of this myself and would be happy to do so once I am too that point. I am sure that in another few weeks I will have the qualifications. I am not only on-line gathering info but also reading hard text in books that I have purchased.

So do you not know what the abbreviations means I had mentioned in above post? I would have thought that your FSM would have the same? Can you confirm either my suspicions as being correct or incorrect?

Thanks

Can you ( or someone ) tell me how Chrysler originally measured yours and my cam, was it at @.050" lift, or @.020" of lift or some other unknown standard?

Thanks

unless stated other wise, you have to assume the valve opening timing in the FSM is 'advertized' which means it is undefined,, probably somewhere around .006 or so,, maybe...

that is why the @.050 measurements are so meaningful

OK, thanks

1930,, here is an idea for you

leave the stock cam in the engine, remove enough off the engine so you can properly attach a degree wheel and measuring devices.

then degree the cam and determine where the FSM cam specs are arived from...

start a thread on your process, document with photos,, that would get you the hands on experience that you need.

That is a great idea and was the plan. I did send you an e-mail ( and a P.M ) with a specific question concerning getting this all of this done. Let me know if you have received. Thanks