Originally Posted by
Loren
Oh, I do remember looking at that thread before. Good stuff!
So, the rollers are integrated into the camshaft. No changes to the lifters. And this car doesn't use rockers at all. The last engine I had open was a 1.3 Festiva engine with a rocker shaft and rocker arms... I totally wasn't thinking twin-cam with direct-acting hydraulic lifters!
Unless the roller cam provides more valve lift, there's probably not enough benefit to make it a worthwhile swap.
But, maybe that coupled with the low-friction timing chain might add up to a tiny bit of improvement?