Effects of valve lift - worth it going higher?

[oldeskewltoy]

totta Crolla Wrote:Catcams say the same thing for their 9.5mm lift cams.
I guess you need to relieve some of the head casting for 10mm lift ?

Interesting question to ask....

@ 10mm of cam lift the cams DID just clear the castings.....



but not by enough... Ted's said .015" I couldn't get a feeler gauge in there... but that looked to be closer than .015" to me, so I just made sure all the lobes would not have any issues




Teds also has valve springs (additional option for valve springs) theirs have seat pressures of 62#s. For comparison stock is 35#s, HKS is 32#s, Toda and TRD are 52#s




**IF** you go with high lift, "short duration" cams, and you use high seat pressure valve springs.... I STRONGLY recommend a kevlar toothed timing belt.... Rotating those cams ,pressing down those springs adds CONSIDERABLE forces upon the timing belt....