67 383 Dart
I am thinking my 67 383 pistons are .040" below deck at TDC. Wish now I would have measured this when I had it opened up. Take your best guess from this photo, it's right up there. Some are saying a lot of the 383s were at .025" below deck ???
Next cam specs for the 67 383 4 bbl. I like to go by what the books say, but I wanted to measure mine just so I would know roughly where it is at. My thing was I wanted to keep this engine as close to original stock as possible with the original camshaft and lifters. Just doing a valve job and adding the hardened exhaust seats, new valves, new springs.
Granted this is a 50 year old engine with at least 60,000 miles on it, so there is going to be some decline in the lift and duration numbers compared to a brand new stock cam.
I ran across some information 3 years ago about this camshaft as it was set up to work well with the small 516's exhaust valves of this 383. From the information I gathered, Ma Mopar set this cam up with a split grind, the difference between the intake and exhaust profiles. Giving the exhaust valves more duration and more lift to hold them open longer and higher than the larger intake valves, providing better exhaust scavenging with the smaller exhaust valves.
Right or wrong this sounds good to me. Here is what I came up with when measuring this 50 year old 383 camshaft and 516 Closed Chambered Head combination:
Intake/Exhaust .387"/.420" Lift
Intake/Exhaust 245*/330* Degrees Duration
110* Degree Lobe Centers
You can form your own opinions, I enjoy looking into all of this and the history behind it.
If you want to see how nice this 67 383 runs, you can search it out on youtube:
Mopar 1967 383 Original Engine
Here is the actual YouTube Link:
Enjoy . . .
I am thinking my 67 383 pistons are .040" below deck at TDC. Wish now I would have measured this when I had it opened up. Take your best guess from this photo, it's right up there. Some are saying a lot of the 383s were at .025" below deck ???
Next cam specs for the 67 383 4 bbl. I like to go by what the books say, but I wanted to measure mine just so I would know roughly where it is at. My thing was I wanted to keep this engine as close to original stock as possible with the original camshaft and lifters. Just doing a valve job and adding the hardened exhaust seats, new valves, new springs.
Granted this is a 50 year old engine with at least 60,000 miles on it, so there is going to be some decline in the lift and duration numbers compared to a brand new stock cam.
I ran across some information 3 years ago about this camshaft as it was set up to work well with the small 516's exhaust valves of this 383. From the information I gathered, Ma Mopar set this cam up with a split grind, the difference between the intake and exhaust profiles. Giving the exhaust valves more duration and more lift to hold them open longer and higher than the larger intake valves, providing better exhaust scavenging with the smaller exhaust valves.
Right or wrong this sounds good to me. Here is what I came up with when measuring this 50 year old 383 camshaft and 516 Closed Chambered Head combination:
Intake/Exhaust .387"/.420" Lift
Intake/Exhaust 245*/330* Degrees Duration
110* Degree Lobe Centers
You can form your own opinions, I enjoy looking into all of this and the history behind it.
If you want to see how nice this 67 383 runs, you can search it out on youtube:
Mopar 1967 383 Original Engine
Here is the actual YouTube Link:
Enjoy . . .
