ben

Yeah, I think i'll stick with the Webers, twin 40s should go alright. I'll get the cam hardened and i guess whoever does that can keep similar specs but on a solid cam.

Thanks but i'm in Sydney at the moment! So i have to get the Cam hardened but also change the profile? How does the solid cam profile differ from hydraulic? I currently am running a single sidedraft DCOE 40mm Weber and when i've eventually converted to solid lifters i'm thinking about running either twin Webers or twin SU's. I'm a big fan of the Weber but would the SU's be any better?

the 5K goes heaps harder with new valve springs and holden lifters, it was running a bit lean so i changed my float level on the weber and made more power again. My problem is i still have what sounds like tappet rattle occasionally and the engine misfires on acceleration every now and then. All the carb jets are clean and ignition is good. Could the spring pressures be too high for the hydraulic lifters as they are now at 100lbs? I don't know what else it could be unless the holden lifters don't work that well. Could chewing out the lifter damage the cam? The lifters are maintaining zero clearance ok so what else could make it run badly- i've only changed the springs and lifters. Could the lifters have too much preload with the new springs? I'm going to change to solids anyway but i just want to make sure it runs ok before i do that. I can get 4k rocker gear ok and will run chev solids with 1 piece pushrods. Very Frustrating!!!!

The lifters that i put in are holden 6 hydaulic lifters and they work ok. So the rocker arms from a 4k will fit on the 5k shaft? or do i have to replace the whole rocker arms, shaft and pedistals with 4k items?

I have a 5k with just a bit of work done to it, 85hp at rear wheels at 7500rpm in a KE30 2dr sedan. I recently broke a valve spring as the cam has a lot of lift. Fitted new double springs with about 100lb seat pressure but chewed a lifter straight away. Replaced all lifters and runs ok again but to save the hasle of hydraulic lifters i want to change to solids. I know i have to have to cam hardened and that chev solid lifters will fit and pushrods i will change for 1 piece items of the required length. My question is: will the adjustable rockers from a 3k or 4k fit on the shaft of the 5k? I've been told that i might make an extra 10hp and an extra 500pm to be 95hp at 8000rpm as well?