Re: Just returned from the track....Something is wrong!
[Re: Crizila]
#254984
03/18/09 08:56 PM
03/18/09 08:56 PM
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Joined: Oct 2003
Posts: 7,506 Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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EZ valve train geometry check: Remove the rockers. Wipe a few valve stems dry with solvent. Then color them black ( at least one intake and one exhaust ) with a magic marker. reinstall the rockers. Rotate the engine through several cycles. Remove the rockers and examine the contact pattern. If it's centered on the stem and not too near the stem edges, your good to go.
Fastest 300
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Re: Just returned from the track....Something is wrong!
[Re: Pacnorthcuda]
#254986
03/18/09 09:11 PM
03/18/09 09:11 PM
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Joined: Aug 2003
Posts: 8,716 Baltimore/Denver
64Post
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master
Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
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Quote:
...so had he degreed the cam in the first place....
...instead of lining up the dots...
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Re: Just returned from the track....Something is wrong!
[Re: 69L78Nova]
#254987
03/18/09 09:22 PM
03/18/09 09:22 PM
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Joined: Dec 2007
Posts: 7,759 So Cal
HealthServices
Why would you even post that?
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Why would you even post that?
Joined: Dec 2007
Posts: 7,759
So Cal
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When finding TDC with the piston stop make sure to go VERY SLOW as you come up to the piston stop. You do not want to create any new problems.
Allen
Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first.
Life was a little easier when I was just a wrench.
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Re: Just returned from the track....Something is wrong!
[Re: HealthServices]
#254988
03/18/09 09:47 PM
03/18/09 09:47 PM
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Joined: Aug 2003
Posts: 8,716 Baltimore/Denver
64Post
master
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master
Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
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Quote:
When finding TDC with the piston stop make sure to go VERY SLOW as you come up to the piston stop. You do not want to create any new problems.
What... like breaking the stop off in the cylinder?
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Re: Just returned from the track....Something is wrong!
[Re: Crizila]
#254989
03/18/09 10:02 PM
03/18/09 10:02 PM
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Joined: Feb 2005
Posts: 143 North America
kwikblownhemi
member
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member
Joined: Feb 2005
Posts: 143
North America
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Quote:
Interesting thread. Lotta experts here. I didn't say he didn't have a timing problem. I said cutting it back 3-4 degrees wasn't going to solve his problem. Neither is degreeing in his cam - if his marks are lined up correctly.
Lining the marks up means nothing. I had a customer's race 440 in the shop a few years ago because he couldn't get it to run - a real pig. I checked the cam timing and it was hugely retarded -about 15 degrees IIRC. Did I mention the marks were aligned? The cam gear/ a MP double roller set/ was marked off one tooth. Seems he hadn't wanted to go to the trouble to degree it when the engine was built.
It amazes me all the guys who drop big bucks on an engine build but won't spend less than $100 and an hour or so to degree the cam.
There's never enough money to do it right, but always enough to do it over.
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Re: Just returned from the track....Something is wrong!
[Re: 69L78Nova]
#254994
03/18/09 10:49 PM
03/18/09 10:49 PM
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Joined: Nov 2007
Posts: 21,819 Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,819
Kirkland, Washington
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Quote:
Well, I just tried degreeing the cam. Repeated it 6 times to verify my results. The number I came up with is 116.5. If this cam is on a 108*, then Im 8.5* out? Which direction do I go? Advance or retard? To my knowledge, I cant seem to find a source that had 8 degree offset keyways. Any ideas?
Wow...thats off! Are you sure your TDC was accurate (which determines your positioning of the degree wheel) If it is accurate, your WAYYYYY retarded, and need to advance. Summit makes a great billet 9 slot set for about $70 that would be great (+/- 2 degrees, +8 to -8) But I gotta question if your 116.5 is accurate.
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Re: Just returned from the track....Something is wrong!
[Re: 69L78Nova]
#254998
03/18/09 11:07 PM
03/18/09 11:07 PM
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Joined: Aug 2003
Posts: 8,716 Baltimore/Denver
64Post
master
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master
Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
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Nevermind... that was no help.
How are you arriving at TDC?
Last edited by 64Post; 03/18/09 11:09 PM.
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