Hi Barbz,
Thank your for your advice. Sounds very good - had thoughts about this, too. Only problem is the adjustment. What solid lifter did you use?! Only ones, I found, were metal housings, which had to be filled up with shims from below.
Means first you have to fill up the lifter with shims, afterwards you have to mount them incl. the cams.
If tolerance is not ok, you have to demount both, lifter and cams.
A lot of work - are your solid tappets the same, aren't they?
Second problem are the cams themselves - you will need new ones, because the hydraulic lifter cams have no adequate chamfer to deal with solid tappets for a longer time :-(
Do you use new cams as well or do you try it with the old ones? CB would deliver new cams for solid lifters.
I did without solid lifters - I went another way. Hartmut Lohman showed me a cylinder head for hydraulic lifters from Ferrari, good for 9500revs. Only difference to Fiat head was the oil bore - the oil bore from Ferrari head was more oval to "have more time" to deliver the lifter with oil. I hope, you understand, what I am meaning.
My solution: we ported all oil bores within the Fiat head to this ovality to allow the lifters to get more oil...
I hope this helps to arrive to my goal of 8000rpm...
More revs are almost senseless - piston speed gets too high because of the long hub of 2,4l.
2l can do much more than 8000, but our 2,4l?!
Ciao
Juergen
