[Z06] Cam Valve Timing Worksheet
06-23-2014, 01:49 PM
#1
Racer
Thread Starter
Cam Valve Timing Worksheet
I built this worksheet when I was looking building my LS7 and though it might be useful for others to use as well. It allows you to see the actual valve timing events without having to dig up cam cards as well as calculate dynamic compression based on your engine specs. I believe the specs for the LS7 are reasonably close and gives you the factory 11:1 compression ratio. I know the piston dish/compression height is probably a little off, but that shouldn't affect the calculations by any significant margin.
Anyways, I hope this is useful (and if you find any issues, please let me know so I can correct them).
Anyways, I hope this is useful (and if you find any issues, please let me know so I can correct them).
06-23-2014, 01:54 PM
#2
Instructor
Member Since: Apr 2014
Location: Austin Texas
Posts: 147
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Looks good just used it Thanks!
I built this worksheet when I was looking building my LS7 and though it might be useful for others to use as well. It allows you to see the actual valve timing events without having to dig up cam cards as well as calculate dynamic compression based on your engine specs. I believe the specs for the LS7 are reasonably close and gives you the factory 11:1 compression ratio. I know the piston dish/compression height is probably a little off, but that shouldn't affect the calculations by any significant margin.
Anyways, I hope this is useful (and if you find any issues, please let me know so I can correct them).
Anyways, I hope this is useful (and if you find any issues, please let me know so I can correct them).
06-23-2014, 03:28 PM
#3
Drifting
Very good stuff there.
06-23-2014, 04:40 PM
#4
Melting Slicks
06-23-2014, 05:18 PM
#6
Safety Car
Great info, I have been studying DCR and many of these camshafts over the last year. My target DCR is around 8.8 - 9.0 with milled heads. These charts really help in figuring out my cam specs. Thanks!
06-23-2014, 05:43 PM
#7
Racer
Thread Starter
http://ls1tech.com/forums/generation...r-results.html
Do you have a reference for your information?
Also, I've measured my stock gaskets at 0.049" and Jason at Katech has measured them at 0.048" even though they are advertised at 0.051". It really isn't significant in the calculations since I modified the piston to get 11:1 compression.
On my build I went with Jason's 0.048". This guarantees that I at least calculate the maximum that the compression can be.
06-23-2014, 07:07 PM
#8
Drifting
I got my info from this post:
http://ls1tech.com/forums/generation...r-results.html
Do you have a reference for your information?
Also, I've measured my stock gaskets at 0.049" and Jason at Katech has measured them at 0.048" even though they are advertised at 0.051". It really isn't significant in the calculations since I modified the piston to get 11:1 compression.
On my build I went with Jason's 0.048". This guarantees that I at least calculate the maximum that the compression can be.
http://ls1tech.com/forums/generation...r-results.html
Do you have a reference for your information?
Also, I've measured my stock gaskets at 0.049" and Jason at Katech has measured them at 0.048" even though they are advertised at 0.051". It really isn't significant in the calculations since I modified the piston to get 11:1 compression.
On my build I went with Jason's 0.048". This guarantees that I at least calculate the maximum that the compression can be.
06-23-2014, 08:55 PM
#9
Safety Car
Even at 8.6, my simulations show that its pulling timing at some RPM points.
I use Engine Analyzer Pro, btw
06-23-2014, 10:23 PM
#10
Safety Car
I know two members who are at 9.3 DCR with no issues, Jason at katech said he had a 9.7 on pump gas and said it performed very well. I want to have a lot of low end torque but I want find the right balance without having too much down low.