Re: cam degreeing question
[Re: Jerry]
#2173101
10/12/16 07:38 PM
10/12/16 07:38 PM
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Joined: May 2011
Posts: 4,489 northern,Ohio,USA
Clanton
master
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master
Joined: May 2011
Posts: 4,489
northern,Ohio,USA
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Must be retarded 11,I think 11* is 1 tooth on the crank gear but I could be wrong.
Last edited by Clanton; 10/12/16 07:41 PM.
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Re: cam degreeing question
[Re: Clanton]
#2173201
10/12/16 10:30 PM
10/12/16 10:30 PM
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Joined: Jan 2005
Posts: 4,243 Charlotte, North Carolina
sgcuda
master
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master
Joined: Jan 2005
Posts: 4,243
Charlotte, North Carolina
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Must be retarded 11,I think 11* is 1 tooth on the crank gear but I could be wrong. 1 tooth is 12 degrees. Close enough to show that it is more than likely off a tooth. But don't trust Clanton. He sniffs race gas and can't use a timing light (Read your other post )
[image][/image]
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Re: cam degreeing question
[Re: sgcuda]
#2173215
10/12/16 10:49 PM
10/12/16 10:49 PM
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Joined: May 2011
Posts: 4,489 northern,Ohio,USA
Clanton
master
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master
Joined: May 2011
Posts: 4,489
northern,Ohio,USA
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Must be retarded 11,I think 11* is 1 tooth on the crank gear but I could be wrong. 1 tooth is 12 degrees. Close enough to show that it is more than likely off a tooth. But don't trust Clanton. He sniffs race gas and can't use a timing light (Read your other post ) LOL Thanks for making me laugh.
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Re: cam degreeing question
[Re: Jerry]
#2173234
10/12/16 11:11 PM
10/12/16 11:11 PM
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Joined: Jan 2003
Posts: 14,506 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,506
So. Burlington, Vt.
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A tooth is 14deg on a double roller set up.
Absolutely don't go by only one timing event. Check the intake and exhaust open/close points, then determine the installed c/l vs the desired c/l.
I have come across timing sets that had a dot on the wrong tooth 3 times..... So I never assume dot to dot is going to put the cam where it should be. If you're using a 3 way set, between the +/- 8deg, and a bushing kit, you'll be able to get it within 1 deg. Or, if it's way off and you don't want to deal with the bushings you can get a 9 way set or a Cloyes hex-a-just.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: cam degreeing question
[Re: Jerry]
#2173295
10/13/16 12:17 AM
10/13/16 12:17 AM
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Joined: May 2008
Posts: 1,131 Thigh-Gap Junction
@#$%&*!
New user name, Same old jerk!
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New user name, Same old jerk!
Joined: May 2008
Posts: 1,131
Thigh-Gap Junction
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I've got a 440 I put together years ago. the engine ran. ...
now when I measure the cam timing I seem to be 11 degrees off. I measured the cam at .050 lift. You need to find the actual intake lobe centerline by finding the crank angle of two points equally down from max lift on either side. Then you need to somehow average the two angles.
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Re: cam degreeing question
[Re: Jerry]
#2173350
10/13/16 02:04 AM
10/13/16 02:04 AM
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Joined: Aug 2003
Posts: 43,252 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,252
Bend,OR USA
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Last edited by Cab_Burge; 10/13/16 02:05 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: cam degreeing question
[Re: birdtracker]
#2173388
10/13/16 05:13 AM
10/13/16 05:13 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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My thought is the rings never sealed. I plan on reringing it this winter. here's a good read on breakin. "breakin secrets" at www.mototuneusa.com scroll down till you get to it. OP as said I would find intake lobe CL (highest point on the lobe peak) which'll be the number of degrees that number is away from piston TDC, IE 106 degrees. Holler how it turns out
live every 24 hour block of time like it's your last day on earth
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Re: cam degreeing question
[Re: Jerry]
#2173581
10/13/16 01:26 PM
10/13/16 01:26 PM
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Joined: Jan 2003
Posts: 14,506 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,506
So. Burlington, Vt.
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Fwiw, I'd shoot for a 106-108 intake c/l. If you had to move the cam several degrees to get it there, then I'd recheck the v/p clearance(unless when you checked it during the original build it had tons to spare).
Then before I buttoned everything back up I'd check the cranking compression again.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: cam degreeing question
[Re: Jerry]
#2173678
10/13/16 03:18 PM
10/13/16 03:18 PM
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Joined: May 2011
Posts: 4,489 northern,Ohio,USA
Clanton
master
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master
Joined: May 2011
Posts: 4,489
northern,Ohio,USA
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I took the lash out of the system and was measuring at the valve retainer. I have 1.6:1 comp rockers on there. and was measuring .080 inches at the spring retainer.
right now the cam gear being marked a tooth off is making a lot of sense. hopefully i'll have time before the end of the day to get it rechecked.
I was going to swap a .528 cam in its place because this one was a dog down low. maybe if I get the cam timing sorted out, I wont have to. You will be redoing the ign timing and that will help also maybe.Noone has said it yet but it is the cam gear that is off 1 tooth not the crank like I said.
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Re: cam degreeing question
[Re: Jerry]
#2173722
10/13/16 04:11 PM
10/13/16 04:11 PM
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Joined: Jan 2003
Posts: 2,094 central texas
krautrock
top fuel
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top fuel
Joined: Jan 2003
Posts: 2,094
central texas
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this is what Hughes says for degreeing a camshaft that is asymmetrical http://www.hughesengines.com/Upload/productInstructions/camshaft_instructions_Mar_2016.pdfedit: i did a little reading after this one ^ and it looks like lunati says to degree based off of the intake lobe opening vs. what the cam card says. ie. if the card says intake opens at 8* before and it opens 10* before then it's 2* advanced. comp says to add the degrees from intake open and close and divide by two...
Last edited by krautrock; 10/13/16 04:14 PM.
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