Cam degree problems...
05-06-2016, 06:25 PM
#1
Launching!
Thread Starter
iTrader: (2)
Join Date: Nov 2014
Posts: 207
Likes: 0
Received 0 Likes
on
0 Posts
Cam degree problems... 
I'm degreeing in my cam and my closing valve events on the intake and exhaust Lobes on #1 cyl don't match my cam card. I'm getting: IC 68*, EC 20*.
Lobe lift checked out on both intake and exhaust.
Intake centerline checked out @112.
I checked the valve events at .050.
I'm using a comp cams LS degree kit.
Cam is installed straight up (dot to dot) for checking purposes.
So just curious of what to do next? Weird that my intake and exhaust "open" valve events match the card but not the closing events?
05-06-2016, 08:05 PM
#3
Launching!
Thread Starter
iTrader: (2)
Join Date: Nov 2014
Posts: 207
Likes: 0
Received 0 Likes
on
0 Posts
[QUOTE=KCS;19251947]How are you degreeing
I use a piston stop to find true tdc. Then I zero my dial indicator on the base circle. Then I I checked the io @.050. It matched. Then I checked IC @.050 b4 it closed and it's not matching. I did the same for the exhaust. Same outcome. Matches when it opens and doesn't match up closing. I followed a guide online that I found to do the valve events.
I also used the "intake centerline method" to check intake centerline and it checked at 112. I followed comp cams directions for this method.
I use a piston stop to find true tdc. Then I zero my dial indicator on the base circle. Then I I checked the io @.050. It matched. Then I checked IC @.050 b4 it closed and it's not matching. I did the same for the exhaust. Same outcome. Matches when it opens and doesn't match up closing. I followed a guide online that I found to do the valve events.
I also used the "intake centerline method" to check intake centerline and it checked at 112. I followed comp cams directions for this method.
05-07-2016, 06:07 AM
#5
Do you have a lifter you are using? From memory I seem to recall my lifter was turning a bit so I used an old lifter tray. I had to sand it out a bit so the lifter would easily move under its own weight and would follow the cam correctly. It was OK on the lift side but after the lifter reached maximum lift it would not keep contact with the cam until I modified the lifter tray.
05-07-2016, 07:47 PM
#6
Launching!
Thread Starter
iTrader: (2)
Join Date: Nov 2014
Posts: 207
Likes: 0
Received 0 Likes
on
0 Posts
Do you have a lifter you are using? From memory I seem to recall my lifter was turning a bit so I used an old lifter tray. I had to sand it out a bit so the lifter would easily move under its own weight and would follow the cam correctly. It was OK on the lift side but after the lifter reached maximum lift it would not keep contact with the cam until I modified the lifter tray.
I was off 1 degree on each IO-9* & IC-51*. Came up with a 111* int centerline.
Exhaust side matched 100% to the cam card.
I came up with a 112.5 LSA.
So I'm thinking it was my own error and this cam is good to go.
And yes I am degreeing it heads off with the Johnson 2116 link bars. They move very smooth up and down the bore on cyl #1.
I tried cyl#2 & the lifters were not moving smooth so I went back to cyl#1 & everything checked out.
I'm assuming I should b good to go to install this cam straight up or should I triple check my #'s or move to a different cyl? What do u guys think?