Wanted to know if anyone knew the installation ***** for the ZZ4 cam, mine didn'y come with the cam card and I can't find it on the net.

Thanx

 

Aww look at that... I went to www.google.com .... typed in "ZZ4 cam specs" and it came up with this ! .474 / .510 208 / 221

 

I already know the lift and duration....I'm talking about the valve timing.

 

Ask the place you bought it from. I'd check it very closely though. It makes me nervous to get something that isn't complete, even if it's something as small as a card or instruction sheet that is missing.

 

It's a stock (i.e. GM) cam. There's only one way to put it in right, and that would be ..... the right way. Any other way is wrong. You line up the dots on the timing chain, etc. Not many options, really.

What is it that you really are trying to ask?

 

I want to degree the cam according to specs, I might be stuck going straight up as in the previous post, unless there's anyone out there that knows the valve timing.

 

example:

VALVE TIMING OPEN CLOSE
AT .050 INT 20 BTDC 53 ABDC
EXH 63 BBDC 17 ATDC

 

The spec is straight up, but with a GM timing set. This is very important: aftermarket timing sets advance the cam 4° compared to late-model GM sets - or, more accurately, late-model GM sets such as that cam is designed for retard the cam 4° compared to other sets, including earlier-model GM sets. GM started doing that in about 71 as part of emissions downgrades; that lower cyl pressure at low RPMs, and therefore NOx emissions. So, either use a GM set, or install it 4° retarded with an aftermarket set, unless you want to advance it, which will probably make it run better anyway.

 

thanx RB8 I was startin to get frustrated ;-)