D0VE -vs- C8VE heads

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Oct 27, 2003 | 08:41 AM

#16

neverenough

Elder User

Joined: May 2003

Posts: 549

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Re: Pre -70 timing chain

Quote:

Originally posted by Tony G

So if a '73 cam begins opening the valves 4 degrees later, the aftermarket cam makers would eventually design their cams to open 4 degrees earlier to counter the retarded timing set.? Havn't they done this?? I have a aftermarket cam and would consider putting a straight up timing set on if I can resolve this question.

No, replacement is replacement, it is expected that you will use all replacement parts. If the cam was made with 4 degree offset and you used a 4 degree offset timing gear, that would put you at 8 degrees. With the aftermarket cams, they must work in all motors listed. So unless you have a cam specified for '72-'87 "carbed" motors it will be zero offset. If it is specified that way then it is best to call the maker and find out why. '68-'71 carbed motors and EFI motors do not use the offset timing gear so a cam must be made straight up to fit all motors.