Check it with a Mityvac when you get it and see how much vacuum it takes to pull the rod all the way in; they've been known to mis-box them.Ok, Checker auto has ordered me the Niehoff DR-305 and claims it will be here on March 03. I will let you know if it actually shows up. They said the others were unavailable.
I checked my cam installation per UDHarold's method above. I wondered if I had a problem because the 30-30 liked so much initial timing. It checked out right in tolerance with the intake valve open .055" more than the exhaust valve.Re: new cam, cars not happy under 2k
I recommend my 'Quick & Dirty' method for verifying that the cam was installed correctly. The reason being, IF the cam is installed even slightly retarded, one of the obvious indications is that the engine takes more timing to run right, and there is a lock of bottom-end power and response.
You have this, so it is worth checking it out.
You only have to remove a valve cover.
Turn the engine up to TDC, and look at #1 cylinder's valves.
If BOTH valves are closed, you need to turn the engine one more turn so that both valves are off the seat at TDC.
Check the heights of the top of the retainers to the spring seats. The intake valve should be .030" to .060" CLOSER to the head. If the exhaust valve is closer, the cam is retarded and you have to take off the front cover and install the cam correctly.
The most common problem is that you have lined up the keyway with the dot on the keyway. The correct mark is on a tooth a couple of teeth counter-clockwise from the keyway. The cam does not have to be taken out to fix this problem.
http://www.chevelles.com/forums/showthread.php?p=1421138&highlight=quick+dirty#post1421138
I hear you Gary, but I have never been able to get 9" of vacumn ever with this thing. i may still have other issues somewhere else that I just havent found yet, but with the old B1 vacumn can back on it the little car flat screems. There are no idle issues and it will sit and idle at 900 - 950 rpm all day and not miss a beat. I dont have a vacumn pump so I dont know what vacumn exactly the new B28 can was opening but it seemed like it was an all or nothing type unit.You need 9-10 in. HG. to keep the canister deployed. It died because the vacuum droppped and so did 15 degrees of advance. I would think the vacuum would go up with the extra advance and the blades closing more. I have to admit, mine is touchy on this also. It really needs to idle at 950 - 1000 RPM to keep the cannister deployed.