will 2.02 valve heads work on stock bottom end ?

[89lxcoupe]

will 2.02 valve heads work on stock bottem end ?

 

[65ShelbyClone]

Maybe with a lame low-lift cam, but otherwise no. 1.90s are a stretch.

 

[C0V3R]

On TW heads yes according to TFS and my experience..

 

[86bluecobra]

Maybe with a lame low-lift cam, but otherwise no. 1.90s are a stretch.

Its not the lift that is the issue. When a cam is at max lift the piston is nearing the bottom of the cylinder or at least on its way down. it is duration that you have to worry about for you piston to valve clearence.

 

[Modular2v]

Its not the lift that is the issue. When a cam is at max lift the piston is nearing the bottom of the cylinder or at least on its way down. it is duration that you have to worry about for you piston to valve clearence.

exactly!

 

[65ShelbyClone]

Its not the lift that is the issue. When a cam is at max lift the piston is nearing the bottom of the cylinder or at least on its way down. it is duration that you have to worry about for you piston to valve clearence.

I was speaking from the position that more lift can be done without more duration, but it places more demand on a good valvetrain. With that in mind, most aftermarket cams combine the two. My Crane 2031 is a high lift/low duration cam, but I still had to clearance the pistons with 1.90s.