ou are not likely to find that number.. From those who really should know, it is said that the cam wears very little due to small spring pressure and the fact that lobes are flame hardened. I would measure all & compare to one another & if all are about same, call it good.(quoted from post at 16:09:48 10/13/12) What is the proper valve lift for a '49 8N Thanks
(quoted from post at 17:13:47 10/13/12)ou are not likely to find that number.. From those who really should know, it is said that the cam wears very little due to small spring pressure and the fact that lobes are flame hardened. I would measure all & compare to one another & if all are about same, call it good.(quoted from post at 16:09:48 10/13/12) What is the proper valve lift for a '49 8N Thanks
(quoted from post at 13:09:48 10/13/12) What is the proper valve lift for a '49 8N Thanks
ource?(quoted from post at 20:42:29 10/13/12)(quoted from post at 13:09:48 10/13/12) What is the proper valve lift for a '49 8N Thanks
Intake=0.3553
Exhaust=0.3370
ool! I looked there, but obviously not close enough! Thanks.(quoted from post at 23:08:49 10/13/12) http://www.oldfordtractors.com/oftspecs.htm
Not sure if it's 100%, but seemed close enough to rebuild my engine. The "original" copy was soaked in oil in the tool box so it took me awhile to find it again.
(quoted from post at 23:16:17 10/13/12)ool! I looked there, but obviously not close enough! Thanks.(quoted from post at 23:08:49 10/13/12) http://www.oldfordtractors.com/oftspecs.htm
Not sure if it's 100%, but seemed close enough to rebuild my engine. The "original" copy was soaked in oil in the tool box so it took me awhile to find it again.
learly still not looking close enough!(quoted from post at 07:33:05 10/14/12)(quoted from post at 23:16:17 10/13/12)ool! I looked there, but obviously not close enough! Thanks.(quoted from post at 23:08:49 10/13/12) http://www.oldfordtractors.com/oftspecs.htm
Not sure if it's 100%, but seemed close enough to rebuild my engine. The "original" copy was soaked in oil in the tool box so it took me awhile to find it again.
Careful - look at the column dividers in that table. Those numbers are only for the OHV engines - not the L-head.
TOH
(quoted from post at 16:09:48 10/13/12) What is the proper valve lift for a '49 8N Thanks
(quoted from post at 16:19:30 10/14/12)(quoted from post at 16:09:48 10/13/12) What is the proper valve lift for a '49 8N Thanks
I have been looking for those numbers and have not found any .
I measured 6 USED front dizzy "N" cams and got .296 - .298 for a mean lift . They could all be worn .060 for all I know . I threw a quick digital caliper on them and will use a dial gauge down the lifter/valve bore this winter when I get around to building some N motors . I want to throw a degree wheel on it so I can post those numbers too .
They sell reground cams on this site but I have not talked to anyone who has purchased one .
I would bet these numbers have been measured 1000's of times over the years , but I can't find any posted .
I forgot to write it down , but the bearing journal was the same diameter as a 1937 - 21 stud flathead V8 cam I had in the shop . The V8 cam had a low lift of about .298 also .
I will measure the V8 block for an O.D. cam bearing diameter and post that someday ???
P.S.
These are front mount distributor cams , I think I have read that the side mount cams have a higher lift .
After WWII and the introduction of better fuel , the industry raised compression ratios and valve lifts . The cam was redesigned with the side dizzy so I assume the engineers pepped it up a little ????
(quoted from post at 10:25:15 10/14/12)learly still not looking close enough!(quoted from post at 07:33:05 10/14/12)(quoted from post at 23:16:17 10/13/12)ool! I looked there, but obviously not close enough! Thanks.(quoted from post at 23:08:49 10/13/12) http://www.oldfordtractors.com/oftspecs.htm
Not sure if it's 100%, but seemed close enough to rebuild my engine. The "original" copy was soaked in oil in the tool box so it took me awhile to find it again.
Careful - look at the column dividers in that table. Those numbers are only for the OHV engines - not the L-head.
TOH
And if trying to check cam for wear on those OHV engines, one would need to measure at the valve, not the cam lobes, unless he knew the rocker arm ratio, since the chart gives valve lift. That would be obvious to TOH, but maybe not for the world wide population. :wink:
The stock valve lift and profile for the flathead cams varied (all numbers taken from original Ford prints):
[list:aab320f377][*:aab320f377]1932-38 Ford V8 used a 6 arc profile with a .307 lift. Camshaft numbers 18-6250 and 78-6250[*:aab320f377]1949-51 Ford V8 used a triple curve profile with a .307 lift. Camshaft number 8BA-6250[*:aab320f377]1949-50 Mercury V9 used a triple curve profile with a .380 lift. Camshaft number 8CM-6250.[*:aab320f377] The 1937-48 Ford six cylinder used a triple curve profile with .350 lift. Camshaft number 7HA[/list:u:aab320f377] The 120 CID 4 cyl camshaft journal diameters are the same as for the V8's. Clevite camshaft bearing set SH-21S fits the V8 and has OD of 1.9275/1.9285. You would need to punch the 120 CID L-head out .131 over to use them in that motor - should be plenty of meat to accomodate that.
TOH
(quoted from post at 19:49:44 10/14/12) http://www.tildentechnologies.com/Technical/CamHistory.html
http://www.tildentechnologies.com/Technical/FlatheadPerformance.html
Well, it was a slow day......so I measured the valve lift on my 8N and my numbers agree with your numbers, as far as my measurement accuracy can be trusted and this is a side mount 8N. I found 0.285 on both I & E.(quoted from post at 16:19:30 10/14/12)(quoted from post at 16:09:48 10/13/12) What is the proper valve lift for a '49 8N Thanks
I have been looking for those numbers and have not found any .
I measured 6 USED front dizzy "N" cams and got .296 - .298 for a mean lift . They could all be worn .060 for all I know . I threw a quick digital caliper on them and will use a dial gauge down the lifter/valve bore this winter when I get around to building some N motors . I want to throw a degree wheel on it so I can post those numbers too .
They sell reground cams on this site but I have not talked to anyone who has purchased one .
I would bet these numbers have been measured 1000's of times over the years , but I can't find any posted .
I forgot to write it down , but the bearing journal was the same diameter as a 1937 - 21 stud flathead V8 cam I had in the shop . The V8 cam had a low lift of about .298 also .
I will measure the V8 block for an O.D. cam bearing diameter and post that someday ???
P.S.
These are front mount distributor cams , I think I have read that the side mount cams have a higher lift .
After WWII and the introduction of better fuel , the industry raised compression ratios and valve lifts . The cam was redesigned with the side dizzy so I assume the engineers pepped it up a little ????
(quoted from post at 23:19:49 10/18/12)Well, it was a slow day......so I measured the valve lift on my 8N and my numbers agree with your numbers, as far as my measurement accuracy can be trusted and this is a side mount 8N. I found 0.285 on both I & E.(quoted from post at 16:19:30 10/14/12)(quoted from post at 16:09:48 10/13/12) What is the proper valve lift for a '49 8N Thanks
I have been looking for those numbers and have not found any .
I measured 6 USED front dizzy "N" cams and got .296 - .298 for a mean lift . They could all be worn .060 for all I know . I threw a quick digital caliper on them and will use a dial gauge down the lifter/valve bore this winter when I get around to building some N motors . I want to throw a degree wheel on it so I can post those numbers too .
They sell reground cams on this site but I have not talked to anyone who has purchased one .
I would bet these numbers have been measured 1000's of times over the years , but I can't find any posted .
I forgot to write it down , but the bearing journal was the same diameter as a 1937 - 21 stud flathead V8 cam I had in the shop . The V8 cam had a low lift of about .298 also .
I will measure the V8 block for an O.D. cam bearing diameter and post that someday ???
P.S.
These are front mount distributor cams , I think I have read that the side mount cams have a higher lift .
After WWII and the introduction of better fuel , the industry raised compression ratios and valve lifts . The cam was redesigned with the side dizzy so I assume the engineers pepped it up a little ????
either. I didn't measure the cam itself. As I said, I measured the valve lift..........with a probe thru the spark plug hole against the valve itself.(quoted from post at 23:30:47 10/18/12)(quoted from post at 23:19:49 10/18/12)Well, it was a slow day......so I measured the valve lift on my 8N and my numbers agree with your numbers, as far as my measurement accuracy can be trusted and this is a side mount 8N. I found 0.285 on both I & E.(quoted from post at 16:19:30 10/14/12)(quoted from post at 16:09:48 10/13/12) What is the proper valve lift for a '49 8N Thanks
I have been looking for those numbers and have not found any .
I measured 6 USED front dizzy "N" cams and got .296 - .298 for a mean lift . They could all be worn .060 for all I know . I threw a quick digital caliper on them and will use a dial gauge down the lifter/valve bore this winter when I get around to building some N motors . I want to throw a degree wheel on it so I can post those numbers too .
They sell reground cams on this site but I have not talked to anyone who has purchased one .
I would bet these numbers have been measured 1000's of times over the years , but I can't find any posted .
I forgot to write it down , but the bearing journal was the same diameter as a 1937 - 21 stud flathead V8 cam I had in the shop . The V8 cam had a low lift of about .298 also .
I will measure the V8 block for an O.D. cam bearing diameter and post that someday ???
P.S.
These are front mount distributor cams , I think I have read that the side mount cams have a higher lift .
After WWII and the introduction of better fuel , the industry raised compression ratios and valve lifts . The cam was redesigned with the side dizzy so I assume the engineers pepped it up a little ????
OK - I have to ask. How slow was it? Did you have a cam laying on the bench yearning for a mic. Or did you pull one out of a running tractor????
TOH
(quoted from post at 23:39:58 10/18/12)either. I didn't measure the cam itself. As I said, I measured the valve lift..........with a probe thru the spark plug hole against the valve itself.(quoted from post at 23:30:47 10/18/12)(quoted from post at 23:19:49 10/18/12)Well, it was a slow day......so I measured the valve lift on my 8N and my numbers agree with your numbers, as far as my measurement accuracy can be trusted and this is a side mount 8N. I found 0.285 on both I & E.(quoted from post at 16:19:30 10/14/12)(quoted from post at 16:09:48 10/13/12) What is the proper valve lift for a '49 8N Thanks
I have been looking for those numbers and have not found any .
I measured 6 USED front dizzy "N" cams and got .296 - .298 for a mean lift . They could all be worn .060 for all I know . I threw a quick digital caliper on them and will use a dial gauge down the lifter/valve bore this winter when I get around to building some N motors . I want to throw a degree wheel on it so I can post those numbers too .
They sell reground cams on this site but I have not talked to anyone who has purchased one .
I would bet these numbers have been measured 1000's of times over the years , but I can't find any posted .
I forgot to write it down , but the bearing journal was the same diameter as a 1937 - 21 stud flathead V8 cam I had in the shop . The V8 cam had a low lift of about .298 also .
I will measure the V8 block for an O.D. cam bearing diameter and post that someday ???
P.S.
These are front mount distributor cams , I think I have read that the side mount cams have a higher lift .
After WWII and the introduction of better fuel , the industry raised compression ratios and valve lifts . The cam was redesigned with the side dizzy so I assume the engineers pepped it up a little ????
OK - I have to ask. How slow was it? Did you have a cam laying on the bench yearning for a mic. Or did you pull one out of a running tractor????
TOH
s correct as I can be given that I did not measure valve clearance, so I make no claim that it is a "cast in concrete" number. Just a better than nothing number.(quoted from post at 08:15:34 10/19/12)(quoted from post at 23:39:58 10/18/12)either. I didn't measure the cam itself. As I said, I measured the valve lift..........with a probe thru the spark plug hole against the valve itself.(quoted from post at 23:30:47 10/18/12)(quoted from post at 23:19:49 10/18/12)Well, it was a slow day......so I measured the valve lift on my 8N and my numbers agree with your numbers, as far as my measurement accuracy can be trusted and this is a side mount 8N. I found 0.285 on both I & E.(quoted from post at 16:19:30 10/14/12)(quoted from post at 16:09:48 10/13/12) What is the proper valve lift for a '49 8N Thanks
I have been looking for those numbers and have not found any .
I measured 6 USED front dizzy "N" cams and got .296 - .298 for a mean lift . They could all be worn .060 for all I know . I threw a quick digital caliper on them and will use a dial gauge down the lifter/valve bore this winter when I get around to building some N motors . I want to throw a degree wheel on it so I can post those numbers too .
They sell reground cams on this site but I have not talked to anyone who has purchased one .
I would bet these numbers have been measured 1000's of times over the years , but I can't find any posted .
I forgot to write it down , but the bearing journal was the same diameter as a 1937 - 21 stud flathead V8 cam I had in the shop . The V8 cam had a low lift of about .298 also .
I will measure the V8 block for an O.D. cam bearing diameter and post that someday ???
P.S.
These are front mount distributor cams , I think I have read that the side mount cams have a higher lift .
After WWII and the introduction of better fuel , the industry raised compression ratios and valve lifts . The cam was redesigned with the side dizzy so I assume the engineers pepped it up a little ????
OK - I have to ask. How slow was it? Did you have a cam laying on the bench yearning for a mic. Or did you pull one out of a running tractor????
TOH
OK - just to clarify for folks who may not be as precise and careful as you with their terminolgy :lol:
[list:348f016554][*:348f016554]Your .285 number is a true measured [u:348f016554][b:348f016554]valve[/b:348f016554][/u:348f016554] lift measured on the valve itself.[*:348f016554]The [u:348f016554][b:348f016554]cam[/b:348f016554][/u:348f016554] lift as measured on the cam is actually .010/.012 [u:348f016554][b:348f016554]more[/b:348f016554][/u:348f016554] to account for tappet clearance.[/list:u:348f016554] Which is why you said your .285 number agrees with Ken's .296/.298 camshaft measurements. Correct?
TOH
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