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Re: degreeing cams with advance ground in [Re: mopar dave] #1686754
10/19/14 09:37 AM
10/19/14 09:37 AM
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines Offline
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Im a little surprised here. There is a lot of information being tossed around here,but no one has asked the question, " who SPECD the cam". Typically,in a Procharger application,someone with pressure or boosted knowledge is involved in the cam selection process. Just like in turbo,charged anf nitrous set up,you start seeing some wider LSAs for a reason.Just because the cam card says Xxx degrees ground in, it doesnt mean it MUST be installed there. I would ask the person who actually specd the cam and or Procharger first if it was my momey


RIP Monte Smith

Your work is a reflection of yourself, autograph it with quality.

WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
Re: degreeing cams with advance ground in [Re: CompWedgeEngines] #1686755
10/19/14 12:24 PM
10/19/14 12:24 PM
Joined: Jan 2007
Posts: 8,048
Mt Morris Michigan
mopar dave Offline OP
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Steve Morris spec'ed the cam and bullet ground it. I just ordered a new dial indicator with mag base as my old one was questionable.

Last edited by mopar dave; 10/19/14 12:36 PM.
Re: degreeing cams with advance ground in [Re: CompWedgeEngines] #1686756
10/19/14 12:46 PM
10/19/14 12:46 PM
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Posts: 7,506
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Crizila Offline
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Quote:

Im a little surprised here. There is a lot of information being tossed around here,but no one has asked the question, " who SPECD the cam". Typically,in a Procharger application,someone with pressure or boosted knowledge is involved in the cam selection process. Just like in turbo,charged anf nitrous set up,you start seeing some wider LSAs for a reason.Just because the cam card says Xxx degrees ground in, it doesnt mean it MUST be installed there. I would ask the person who actually specd the cam and or Procharger first if it was my momey



that's what I did. Steve Morris was my starting point also. Ended up with a comp cams grind.
I always use the positive stop method to find true TDC. Most accurate way. I also run my dial indicator directly off the lifter ( home made with 2 lifters and a section of pipe in between ). To eliminate any confusion, I always degree using the opening / closing #'s ( @.050) on the cam card. I don't do all the lobes, but I dodo one intake and one exhaust. Never had a cam where one # lined up while others didn't. Possible though, as I never checked them all.

8305345-positivestop.jpg (33 downloads)

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Re: degreeing cams with advance ground in [Re: Crizila] #1686757
10/19/14 12:48 PM
10/19/14 12:48 PM
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Az
Crizila Offline
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degreeing

8305346-camdegreeing.jpg (68 downloads)

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Re: degreeing cams with advance ground in [Re: Crizila] #1686758
10/19/14 07:16 PM
10/19/14 07:16 PM
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines Offline
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Quote:

Quote:

Im a little surprised here. There is a lot of information being tossed around here,but no one has asked the question, " who SPECD the cam". Typically,in a Procharger application,someone with pressure or boosted knowledge is involved in the cam selection process. Just like in turbo,charged anf nitrous set up,you start seeing some wider LSAs for a reason.Just because the cam card says Xxx degrees ground in, it doesnt mean it MUST be installed there. I would ask the person who actually specd the cam and or Procharger first if it was my momey



that's what I did. Steve Morris was my starting point also. Ended up with a comp cams grind.
I always use the positive stop method to find true TDC. Most accurate way. I also run my dial indicator directly off the lifter ( home made with 2 lifters and a section of pipe in between ). To eliminate any confusion, I always degree using the opening / closing #'s ( @.050) on the cam card. I don't do all the lobes, but I dodo one intake and one exhaust. Never had a cam where one # lined up while others didn't. Possible though, as I never checked them all.






RIP Monte Smith

Your work is a reflection of yourself, autograph it with quality.

WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
Re: degreeing cams with advance ground in [Re: Crizila] #1686759
10/26/14 11:07 PM
10/26/14 11:07 PM
Joined: Jan 2007
Posts: 8,048
Mt Morris Michigan
mopar dave Offline OP
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ok, finished degreeing cam today. I check open/close numbers. card says 23 open and 65 close. @.050 open I get 22 and @.050 before max lift I get 65. am I doing this right? the install centerline is correct at 111*. thanks

Re: degreeing cams with advance ground in [Re: mopar dave] #1686760
10/27/14 12:36 AM
10/27/14 12:36 AM
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Bend,OR USA
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Cab_Burge Offline
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Your close enough for most folks One degree either side can be chain stretch or optical error Did you check the intake lobe timing by checking it at max lobe lift? Also are you checking intake and exhaust valve to piston clearances? If please do so with a soft checking spring on both valves I do that and check the intake and exhaust lobe timing for lobe seperation angles at the retainers on the same valves at the same time I do check them 3 different times at. 200, .100 and .050 before max lift on both valves to get rid of the one degree errors found at one place or the other I have seen some ILC change by one degree at all three places, 105,104 and 103 That cam went back to the maker


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: degreeing cams with advance ground in [Re: mopar dave] #1686761
10/27/14 01:52 AM
10/27/14 01:52 AM
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Canton, Ohio
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Quote:

ok, finished degreeing cam today. I check open/close numbers. card says 23 open and 65 close. @.050 open I get 22 and @.050 before max lift I get 65. am I doing this right? the install centerline is correct at 111*. thanks




With a 268* duration cam, a .050 23 open BTDC and a close ABDC of 65* will be at a 111* ICL Your at 22/65 close enough. Im always off by a half degree or so. Tolerances when measuring ICL, is tough to get it closer then that. And its not needed, to be more accurate then that.

Re: degreeing cams with advance ground in [Re: Sport440] #1686762
10/27/14 11:20 AM
10/27/14 11:20 AM
Joined: Jan 2007
Posts: 8,048
Mt Morris Michigan
mopar dave Offline OP
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I thought the @50 open/close numbers where measured at .050 open and .050 just before close, but at the 50 before close I got 115. didn't match card, so I tried 50 after max lift and no match either. 50 before max lift and I get 65.
why do they give the close point at .050 before max lift?
i'm done with it now. I told him to check valve clearance and button it up. thanks

Re: degreeing cams with advance ground in [Re: mopar dave] #1686763
10/27/14 03:18 PM
10/27/14 03:18 PM
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Bend,OR USA
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Quote:

I thought the @50 open/close numbers where measured at .050 open and .050 just before close, but at the 50 before close I got 115. didn't match card, so I tried 50 after max lift and no match either. 50 before max lift and I get 65.
why do they give the close point at .050 before max lift?
i'm done with it now. I told him to check valve clearance and button it up. thanks


They don't provide any information on .050 before or after max lift on any cam card I ever seen Most of the checking numbers on the cam card are in reference to before top dead center BTDC and after bottom dead center ABDC on the intake and before bottom dead center BBDC and after top dead center, ATDC, on the exhaust Finding the max lobe lift on the exhaust and intake lobes in relation to BTDC and ATDC is the hard part without coaching, mentoring, or further instructions


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: degreeing cams with advance ground in [Re: Cab_Burge] #1686764
10/27/14 04:33 PM
10/27/14 04:33 PM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
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Re: degreeing cams with advance ground in [Re: Dodgem] #1686765
10/27/14 05:02 PM
10/27/14 05:02 PM
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Posts: 5,746
Ontario, Canada
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Before and after max lift.
https://www.youtube.com/watch?v=bcMuttJ9RFc

Heads on at the valve retainer max lift meathod
https://www.youtube.com/watch?v=1LcYEZwOIQQ

This is a good @.050 demo but he should have backed up and rotated right to .050 before close AFTER BDC.
https://www.youtube.com/watch?v=Qflw6P_p4hE

Re: degreeing cams with advance ground in [Re: Dodgem] #1686766
10/28/14 12:59 AM
10/28/14 12:59 AM
Joined: Jan 2007
Posts: 8,048
Mt Morris Michigan
mopar dave Offline OP
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thanks guys

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