Z06 H/C install progress pics
guy who designed steering rack in front of pulley 
Launching!
Joined: Oct 2004
Posts: 252
Likes: 0
From: PA
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Last edited by Red99TA; Jun 24, 2009 at 12:28 PM.
Well I finally got it after probably a combined total of 4 hrs screwing with the timing. I put in the stock cam gear dot to dot and found it to be at 112 (needs to be 109). Put the adjustable cam gear back on with one of my comp bushings and had my dial indicator on piston #1 and it moved to 105 deg ICL. Pulled the gear off and rotated the bushing upside down and it came out to 109.5 - CLOSE ENOUGH! 
To check it I verified I still had TDC set correctly and measured again and was still at 109.5. Below are pics of the setup. I had to make an adapter plate to get the comp base to mount to my block since it wouldn't thread into any of the holes in the block. Also didn't have a dial indicator extension so I had to mount the dial indicator as close to the lifter as possible which would only make contact with about the last 0.200" of lift but all you really need is max lift +/- about 0.100" lift so it worked out. Now on to cleaning block and pistons.
To check it I verified I still had TDC set correctly and measured again and was still at 109.5. Below are pics of the setup. I had to make an adapter plate to get the comp base to mount to my block since it wouldn't thread into any of the holes in the block. Also didn't have a dial indicator extension so I had to mount the dial indicator as close to the lifter as possible which would only make contact with about the last 0.200" of lift but all you really need is max lift +/- about 0.100" lift so it worked out. Now on to cleaning block and pistons. Launching!
Joined: Oct 2004
Posts: 252
Likes: 0
From: PA
I'm not sure I'd mess with the timing...Dot to dot with the keyway lined up correctly is the way to go.
It's your car, but if your dyno readings are way low, you will have to pull it apart. Of course, on the plus side, they might skyrocket now too! Lets hope they do...
Now clean off those pistons and lets see some heads!
BTW are you going to check PV clearance? Just in case?
It's your car, but if your dyno readings are way low, you will have to pull it apart. Of course, on the plus side, they might skyrocket now too! Lets hope they do...
Now clean off those pistons and lets see some heads!
BTW are you going to check PV clearance? Just in case?
I'm not sure I'd mess with the timing...Dot to dot with the keyway lined up correctly is the way to go.
It's your car, but if your dyno readings are way low, you will have to pull it apart. Of course, on the plus side, they might skyrocket now too! Lets hope they do...
Now clean off those pistons and lets see some heads!
BTW are you going to check PV clearance? Just in case?
It's your car, but if your dyno readings are way low, you will have to pull it apart. Of course, on the plus side, they might skyrocket now too! Lets hope they do...
Now clean off those pistons and lets see some heads!
BTW are you going to check PV clearance? Just in case?
I'm definitely going to check PTV clearance as I expect to need to flycut on the intake side at least 0.020"-0.030" so I want to know what it is prior to cutting.
