Flat tappet to solid roller...

Miszny said

Thanks, this looks really good. I think I will give this,one a shot. Looks really good and price is also good.

Any idea why all these cams have so different lash needs?
Solid rollers on hydraulic roller by Lunati 0,008 cold lash, comp 0,016 lash(warm engine right?), Howards cam 0,022 (also warm?).

So in real cam is .578 lift and others are smaller lift cams, but does bigger lash mean louder valvetrain?
Not that I am worried about noise ;-)

These values are different from what I am used to on european solid cam cars.

Click to expand...

On the hydraulic roller the approach ramps are ground differently and are designed for zero lash with the hydraulic lifter. Comp Cams has some lobes in their catalog I will use in both hydraulic and solid roller applications When I run a solid roller on a hydraulic roller cam, with an iron head, I tighten the lash to .005". Comparing the solid cams, the cam manufacture may have slightly different ramps ground but I'm guessing that if you tighten the Howards lash to .016 you'll get something approaching the Comp XR292R cam but with a tighter lobe separation and a little more mid range torque. You could even loosen the lash, say, to .026" (max in my opinion) and make the cam smaller and see what it does. As far as more noise, there is that possibility, but it won't be significant.