VR cam in a VT 304 block

[rally_toy]

i have a VR 304 that has a spun bearing
i have been offered a 304 from a VT (so roller cam block)
will my VR cam fit in the VT block?
thanks
mark

 

[Biglachs]

No, you will need a roller cam to suit the roller lifters in the vt 304.

 

[Biglachs]

So may as well run stock cam unless you buy a new one.

 

[rally_toy]

thanks for the reply
yes i appreciate that i cant run the roller lifters on my non roller cam
plan was to run the complete drivetrain from the VR (cam followers pushrods roller rockers springs etc) as its all aftermarket gear and ECU has been reprogrammed to suit
i guess i just need to know if the cam 'tunnel' in the VT is that same as the VR?

 

[Biglachs]

Oh sorry mate, I wouldn't have a clue about that :/

 

[HSV08]

i know this is probably a while since and you've probably all ready done something buuuuuut...... you can run the flat tappet in the roller block with the flat tappet lifters etc.
BUUUUT and I have just found out the hard way after building a 355 stroker in my VT senator that the original cam (roller) in that block is a billet item standard as the cast is to soft for the rollers, which means that the oil pump drive gear is hardened to match the billet cam gear. I have just found out the hard way after chewing up my brand new 236* cam gear.
So what im trying to say is that if you run a cast iron flat tappet cam, in a roller block, CHANGE THE OIL PUMP DRIVE GEAR back to a cast. Using the original roller block oil pump drive gear will destroy your cam and oil pump drive gear.

http://forums.justcommodores.com.au...-2002/200494-rebuilding-304-vt-senator-8.html
POST #77 shows what will happen