So I turned my crank into a 277. So my cam has to go from the 180 degree it is now to 138.5.
So Here is my thought and I know someone here has done it or similar.
Measure the ID and find/make an aluminum slug to fit in there tight. Steel also can be used, but aluminum is better if you want to remove the slug later. Plus it will take heat away from the wall and prevent it from getting over burnt in 1 spot. Also a bolt running the length of the cam shaft can be used, that is good to keep it aligned when re fitting in the head. Anyway on to the next step.
Turn the stock cam in a lathe and make a scratch where you want to cut.
Use a degree wheel and make a scratch on either side of the cut line. That is where the cam shaft will have to end up so as to rephase it.
Put it back in the lathe, cut @ the line and its preferable to have a V shaped cut instead of an | shaped cut, cos weld needs a space to fill. Also its better to do the opposite sides right back to back, first like - the it becomes a + then becomes a x+ etc etc. Anyway a good tig welder will get it sorted out perfect.
Then bolt it back together, or put the slug in and press it back with the marks lined up.
Then bolt it back in the head. Weld up the trench.
Check for run out. My guess, dependign on how tight the slug is and how good all the rest is, it should be in spec.
Anyone have any experience doing this. Did you end up with a good result. What needs to be changed in this.
Thanks in advance.
Cool.
Srinath.
So Here is my thought and I know someone here has done it or similar.
Measure the ID and find/make an aluminum slug to fit in there tight. Steel also can be used, but aluminum is better if you want to remove the slug later. Plus it will take heat away from the wall and prevent it from getting over burnt in 1 spot. Also a bolt running the length of the cam shaft can be used, that is good to keep it aligned when re fitting in the head. Anyway on to the next step.
Turn the stock cam in a lathe and make a scratch where you want to cut.
Use a degree wheel and make a scratch on either side of the cut line. That is where the cam shaft will have to end up so as to rephase it.
Put it back in the lathe, cut @ the line and its preferable to have a V shaped cut instead of an | shaped cut, cos weld needs a space to fill. Also its better to do the opposite sides right back to back, first like - the it becomes a + then becomes a x+ etc etc. Anyway a good tig welder will get it sorted out perfect.
Then bolt it back together, or put the slug in and press it back with the marks lined up.
Then bolt it back in the head. Weld up the trench.
Check for run out. My guess, dependign on how tight the slug is and how good all the rest is, it should be in spec.
Anyone have any experience doing this. Did you end up with a good result. What needs to be changed in this.
Thanks in advance.
Cool.
Srinath.