I'm an info guy and like gathering information... I first started a spread sheet on Chrysler factory V-8 engine specs back in the early 2000's but did not have a complete set of service manuals to go year by year, so there were some gaps in my information...
Since then I have been collecting service manuals and building a library for reference and now have updated my spread sheet to cover all v-8 engines from 1965 - 1975 gathering all data from the factory service manuals... I have at least one manual for each year, and in many cases have both the Plymouth and Dodge manuals for each year...
Once in a while I come across conflicting information and try to cross reference it with another manual... For example if I see a wrong spec in the Dodge service manual for that year, I try to cross reference the same year Plymouth manual if I have both... There are only a couple of years that I don't have in both Plymouth and Dodge.... In some cases I also referenced the Chrysler Imperial and Dodge Polara/Monaco manuals....
In a few cases it took a year to put the information for the new products in the manuals... Example the 426 Hemi specs were not in the 1966 manual, but started in the 67 manuals... The 440 six pack was a mid-year launch in 1969, so it isn't listed until the 1970 manual... The 340 six pack was not in the 1970 manual, and they listed it in the 71 manual and the 1972 manual after it was discontinued... Etc...
The most often error that I see is for the compression... I see one compression listed in the summary on the first page of the engine chapter, then a conflicting number in the engine spec's section... In that case I listed both separated by a / separating both values that I've come across... In some cases, it's hard to interpret the information, so I did my best to translate it...
You need to pay close attention to some of the specs as they change then slightly through the years... Not by much, but a little... My next plan is to try to sort the cams by engine family/size to compare the different cams that were used throughout the "good years"....
So I decided to post the information that I have compiled in this thread by year... I have listed the compression, and the compression pressures along with the range or minimum pressure for a compression test for those who do a compression test and want to see if they have a problem, which is asked on this forum from time to time... Now you can look up the compression expected out of your engine from the factory and the minimum range between cylinders...
In 1970 they changed the way they spec'ed the cylinder pressure from range to minimum spec, which I put a note next to that section to show that it changed...
I also included the timing information, but some of that was difficult to decipher and changed many times how they reported it, I did my best to interpret it...
My main intention was to gather all of the camshaft spec information from duration, lift, and intake and exhaust open/close specs...
Here's what I have compiled so far, I hope you guys can use the information and enjoy reading through it.... For solid cam engines, I listed the valve lash and color coded it red if it was spec'ed hot and blue if it was spec'ed cold... Also, if the timing was before TDC I left it black, for timing after TDC I color coded it red....
1965:
1965-1966 (This is from a dual year manual that I have found... I believe the 318 Poly engine valve lash is incorrect so I highlighted it, refer to the chart above or below this one for the proper specs...):
1966:
1967 (note the special cam for the 318 for Canada compared to the US cam... The same lift, but the Canadian cam had 4° more duration on intake and exhaust):
1968 (No cylinder pressure range for 340, but they list it for 69):
1969:
1970 (This is the first year they put a tolerance on the timing specs...):
1971:
1972:
1973 (They took the timing specs out of the service manual and added a note to refer to the emissions sticker):
1974:
1975:
Please click like if you found this information useful...
Since then I have been collecting service manuals and building a library for reference and now have updated my spread sheet to cover all v-8 engines from 1965 - 1975 gathering all data from the factory service manuals... I have at least one manual for each year, and in many cases have both the Plymouth and Dodge manuals for each year...
Once in a while I come across conflicting information and try to cross reference it with another manual... For example if I see a wrong spec in the Dodge service manual for that year, I try to cross reference the same year Plymouth manual if I have both... There are only a couple of years that I don't have in both Plymouth and Dodge.... In some cases I also referenced the Chrysler Imperial and Dodge Polara/Monaco manuals....
In a few cases it took a year to put the information for the new products in the manuals... Example the 426 Hemi specs were not in the 1966 manual, but started in the 67 manuals... The 440 six pack was a mid-year launch in 1969, so it isn't listed until the 1970 manual... The 340 six pack was not in the 1970 manual, and they listed it in the 71 manual and the 1972 manual after it was discontinued... Etc...
The most often error that I see is for the compression... I see one compression listed in the summary on the first page of the engine chapter, then a conflicting number in the engine spec's section... In that case I listed both separated by a / separating both values that I've come across... In some cases, it's hard to interpret the information, so I did my best to translate it...
You need to pay close attention to some of the specs as they change then slightly through the years... Not by much, but a little... My next plan is to try to sort the cams by engine family/size to compare the different cams that were used throughout the "good years"....
So I decided to post the information that I have compiled in this thread by year... I have listed the compression, and the compression pressures along with the range or minimum pressure for a compression test for those who do a compression test and want to see if they have a problem, which is asked on this forum from time to time... Now you can look up the compression expected out of your engine from the factory and the minimum range between cylinders...
In 1970 they changed the way they spec'ed the cylinder pressure from range to minimum spec, which I put a note next to that section to show that it changed...
I also included the timing information, but some of that was difficult to decipher and changed many times how they reported it, I did my best to interpret it...
My main intention was to gather all of the camshaft spec information from duration, lift, and intake and exhaust open/close specs...
Here's what I have compiled so far, I hope you guys can use the information and enjoy reading through it.... For solid cam engines, I listed the valve lash and color coded it red if it was spec'ed hot and blue if it was spec'ed cold... Also, if the timing was before TDC I left it black, for timing after TDC I color coded it red....
1965:
1965-1966 (This is from a dual year manual that I have found... I believe the 318 Poly engine valve lash is incorrect so I highlighted it, refer to the chart above or below this one for the proper specs...):
1966:
1967 (note the special cam for the 318 for Canada compared to the US cam... The same lift, but the Canadian cam had 4° more duration on intake and exhaust):
1968 (No cylinder pressure range for 340, but they list it for 69):
1969:
1970 (This is the first year they put a tolerance on the timing specs...):
1971:
1972:
1973 (They took the timing specs out of the service manual and added a note to refer to the emissions sticker):
1974:
1975:
Please click like if you found this information useful...
