Iso a camshaft for open animal
- Thread starter Repoman
- Start date
Jimbo
You can fool some of the people some of the time
If you are using a stock casting head a .310" lift cam with 1.25 rockers is the max.
The reason being that with the proper tension valve springs you will be extremely close to coil bind with that combination.
With a well designed billet head you can use a bigger cam and not have coil bind but you will need to pay close attention to all the valve train components. A .310 or .315" lift cam (close to .400" lift at the valve) will work well on my billet heads, make good power and provide reasonable life.
The reason being that with the proper tension valve springs you will be extremely close to coil bind with that combination.
With a well designed billet head you can use a bigger cam and not have coil bind but you will need to pay close attention to all the valve train components. A .310 or .315" lift cam (close to .400" lift at the valve) will work well on my billet heads, make good power and provide reasonable life.