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Camshaft Installed Center Line question. #1590975
03/10/14 03:00 PM
03/10/14 03:00 PM
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Columbus, GA
Michael Ecks Offline OP
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I just bought a Lunati Voodoo camshaft to replace the damaged old comp cams stick in my 360.

The voodoo cam lists a LSA of 112 and an ICL of 108, which I realized and it shows on the cam card as 4 degrees advanced.

Does this mean that if I use the crank and cam sprocket "dot-to-dot" as a baseline for installing it, that is ground to be set up close to set up there without using the 4 dgree advanced keyway in the sprocket?

Or does it mean they recommend installing it at four degrees advanced using the crank sprocket keyway to get 108, but "dot-to-dot" would put it at 112.

I know it needs to be properly degree-ed in to be sure. Just wondering where to start as far as setting it up.


"The happiness of your life depends upon the quality of
your thoughts" ~ Roman Emperor Marcus Aurelius
Re: Camshaft Installed Center Line question. [Re: Michael Ecks] #1590976
03/10/14 03:05 PM
03/10/14 03:05 PM
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GTX MATT Offline
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In a perfect world you would need to advance it four degrees from dot to dot. However, dot to dot will pretty much never put a cam at the actual "straight up" position. In a perfect world dot to dot would be a 112 ICL with that cam. BUT who knows what the cam manufacturer did, and what the timing set manufacturer did. Thats why you need to degree it.

I always start with a "0" degree advance setting (aka dot to dot) and check the timing. If its not right try your advanced options.


Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
Re: Camshaft Installed Center Line question. [Re: GTX MATT] #1590977
03/10/14 03:13 PM
03/10/14 03:13 PM
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80fbody Offline
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Not sure I follow GTX Matt on this. Usually the cams come with the 4 degrees "ground in" so if you install dot to dot it should be around 108 in your case. Still need to check though.

Re: Camshaft Installed Center Line question. [Re: Michael Ecks] #1590978
03/10/14 03:16 PM
03/10/14 03:16 PM
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Rio Linda, CA
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Every cam that I've checked recently was 4° advanced when installed dot-to-dot. I've always assumed this was to compensate for chain stretch.


The INTERNET, the MISinformation superhighway
Re: Camshaft Installed Center Line question. [Re: Michael Ecks] #1590979
03/10/14 03:28 PM
03/10/14 03:28 PM
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Crizila Offline
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Quote:

I just bought a Lunati Voodoo camshaft to replace the damaged old comp cams stick in my 360.

The voodoo cam lists a LSA of 112 and an ICL of 108, which I realized and it shows on the cam card as 4 degrees advanced.

Does this mean that if I use the crank and cam sprocket "dot-to-dot" as a baseline for installing it, that is ground to be set up close to set up there without using the 4 dgree advanced keyway in the sprocket?

Or does it mean they recommend installing it at four degrees advanced using the crank sprocket keyway to get 108, but "dot-to-dot" would put it at 112.

I know it needs to be properly degree-ed in to be sure. Just wondering where to start as far as setting it up.


If you put it in dot to dot ( and that is where you should start )and everything else is on the money, it will read 112 and 108 on your degree wheel. No need for an offset key if you want to put it in per the cam specs - which is also a good place to start. Keep in mind this is an automatic 4 degree cam advance web sight .


Fastest 300
Re: Camshaft Installed Center Line question. [Re: 80fbody] #1590980
03/10/14 03:58 PM
03/10/14 03:58 PM
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GTX MATT Offline
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Quote:

Not sure I follow GTX Matt on this. Usually the cams come with the 4 degrees "ground in" so if you install dot to dot it should be around 108 in your case. Still need to check though.




Sure, it MAY have four degrees ground in either on purpose of by error. Depending on whos timing set your using, it may also have 6, or 2, or -5. In an ideal world though, straight up would be straight up.

Last edited by GTX MATT; 03/10/14 03:59 PM.

Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
Re: Camshaft Installed Center Line question. [Re: Michael Ecks] #1590981
03/10/14 07:16 PM
03/10/14 07:16 PM
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Romeo MI
MR_P_BODY Offline
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Dont even try to do the dot to dot... you will never
know what you have... degree it in... and if this is
a street car advance it more than the 108... 104 would
be better for the low end torque... even 102
EDIT
To the manu... 108 is straight up... all they do is
move the key way 4* from the 112

Last edited by MR_P_BODY; 03/10/14 07:20 PM.
Re: Camshaft Installed Center Line question. [Re: MR_P_BODY] #1590982
03/10/14 08:07 PM
03/10/14 08:07 PM
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Crizila Offline
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Quote:

Dont even try to do the dot to dot... you will never
know what you have... degree it in... and if this is
a street car advance it more than the 108... 104 would
be better for the low end torque... even 102
EDIT
To the manu... 108 is straight up... all they do is
move the key way 4* from the 112



When you put the cam, gears , and chain in you need a starting point ( BEFORE YOU START DEGREEING IT IN ). Dot to dot is your starting point. Quite often, you will find ( WHEN YOU START DEGREEING IT IN ), that you will be on the cam spec numbers - or very close. You can make your adjustments form there. As I said, this is a 4 degree advance web sight. I disagree with that approach for several reasons. 1. I'm not as smart as the cam designers. 2.I don't own a WEEGEE board. 3. If you did your home work correctly regarding choosing a cam, you shouldn't have to advance / retard it to make it work better. At least start with it in per the cam card. Then, if you are not happy with it, change it. If you run the motor in and get some compression readings it will be a good place to start. Then when you start moving the cam around, you can see how it might effect the compression readings. Generally, if they start to drop off, you went the wrong way ( or too far) advancing it. If you have to advance it 4-6 degrees for street use, you bought the wrong cam.


Fastest 300
Re: Camshaft Installed Center Line question. [Re: MR_P_BODY] #1590983
03/10/14 08:19 PM
03/10/14 08:19 PM
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Bend,OR USA
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Quote:

Dont even try to do the dot to dot... you will never
know what you have... degree it in... and if this is
a street car advance it more than the 108... 104 would
be better for the low end torque... even 102
EDIT
To the manu... 108 is straight up... all they do is
move the key way 4* from the 112



Never, EVER take anything thing on motors for granted, NEVER I've seen cams that where ground 8 degrees retarded I've seen timing sets marked no where near accurate Take your time and slide that rascal in on the two O marks, line the dots up and check the lifter timing at .050 lifter rise first, that will tell you if your close If not adjust(move the crank gear to another location, advanced or retarded, and recheck it Always verify everything with after market parts, if you don't Mr Murphy will take a big old bite out of your Butt, you know he will At least he does that to me regularily


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Camshaft Installed Center Line question. [Re: Cab_Burge] #1590984
03/10/14 08:42 PM
03/10/14 08:42 PM
Joined: Jan 2003
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nielsville, minn.
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Quote:

Quote:

Dont even try to do the dot to dot... you will never
know what you have... degree it in... and if this is
a street car advance it more than the 108... 104 would
be better for the low end torque... even 102
EDIT
To the manu... 108 is straight up... all they do is
move the key way 4* from the 112



Never, EVER take anything thing on motors for granted, NEVER I've seen cams that where ground 8 degrees retarded I've seen timing sets marked no where near accurate Take your time and slide that rascal in on the two O marks, line the dots up and check the lifter timing at .050 lifter rise first, that will tell you if your close If not adjust(move the crank gear to another location, advanced or retarded, and recheck it Always verify everything with after market parts, if you don't Mr Murphy will take a big old bite out of your Butt, you know he will At least he does that to me regularily




I agree, the last cam I checked was the one in my napa rebuild 318. The guy had installed it dot to dot. The cam had a centerline of 110, dot to dot it was in at 113. The motor had zip for compression to begin with, retarding the cam surely didn't help matters.Dave

Re: Camshaft Installed Center Line question. [Re: Crizila] #1590985
03/10/14 09:19 PM
03/10/14 09:19 PM
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Romeo MI
MR_P_BODY Offline
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Quote:

Quote:

Dont even try to do the dot to dot... you will never
know what you have... degree it in... and if this is
a street car advance it more than the 108... 104 would
be better for the low end torque... even 102
EDIT
To the manu... 108 is straight up... all they do is
move the key way 4* from the 112



When you put the cam, gears , and chain in you need a starting point ( BEFORE YOU START DEGREEING IT IN ). Dot to dot is your starting point. Quite often, you will find ( WHEN YOU START DEGREEING IT IN ), that you will be on the cam spec numbers - or very close. You can make your adjustments form there. As I said, this is a 4 degree advance web sight. I disagree with that approach for several reasons. 1. I'm not as smart as the cam designers. 2.I don't own a WEEGEE board. 3. If you did your home work correctly regarding choosing a cam, you shouldn't have to advance / retard it to make it work better. At least start with it in per the cam card. Then, if you are not happy with it, change it. If you run the motor in and get some compression readings it will be a good place to start. Then when you start moving the cam around, you can see how it might effect the compression readings. Generally, if they start to drop off, you went the wrong way ( or too far) advancing it. If you have to advance it 4-6 degrees for street use, you bought the wrong cam.




Theres only one problem doing it that way... being
a street car once its in and it runs... he will NEVER
move the cam to see if its better or not.. I have
never seen a guy change the C/L on a street car as
long as it ran(I am not talking about a racers street
car but the average street car guy)

Re: Camshaft Installed Center Line question. [Re: MR_P_BODY] #1590986
03/10/14 09:42 PM
03/10/14 09:42 PM
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Crizila Offline
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Quote:

Quote:

Quote:

Dont even try to do the dot to dot... you will never
know what you have... degree it in... and if this is
a street car advance it more than the 108... 104 would
be better for the low end torque... even 102
EDIT
To the manu... 108 is straight up... all they do is
move the key way 4* from the 112



When you put the cam, gears , and chain in you need a starting point ( BEFORE YOU START DEGREEING IT IN ). Dot to dot is your starting point. Quite often, you will find ( WHEN YOU START DEGREEING IT IN ), that you will be on the cam spec numbers - or very close. You can make your adjustments form there. As I said, this is a 4 degree advance web sight. I disagree with that approach for several reasons. 1. I'm not as smart as the cam designers. 2.I don't own a WEEGEE board. 3. If you did your home work correctly regarding choosing a cam, you shouldn't have to advance / retard it to make it work better. At least start with it in per the cam card. Then, if you are not happy with it, change it. If you run the motor in and get some compression readings it will be a good place to start. Then when you start moving the cam around, you can see how it might effect the compression readings. Generally, if they start to drop off, you went the wrong way ( or too far) advancing it. If you have to advance it 4-6 degrees for street use, you bought the wrong cam.




Theres only one problem doing it that way... being
a street car once its in and it runs... he will NEVER
move the cam to see if its better or not.. I have
never seen a guy change the C/L on a street car as
long as it ran(I am not talking about a racers street
car but the average street car guy)



Well - - then he will never know - - and it doesn't really matter if he does or not. I, personally, would rather put it in to spec than guessing that it needs another 4 degrees of advance - even if it's an "educated" guess. As far a compensating for wear goes, I would hope that the cam Mfgs / designers have given that some thought also.


Fastest 300
Re: Camshaft Installed Center Line question. [Re: Crizila] #1590987
03/10/14 10:27 PM
03/10/14 10:27 PM
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GTX MATT Offline
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Quote:

If you have to advance it 4-6 degrees for street use, you bought the wrong cam.




The cam designers are often recommending a 4-6 degree advanced installed centerline


Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
Re: Camshaft Installed Center Line question. [Re: GTX MATT] #1590988
03/10/14 11:24 PM
03/10/14 11:24 PM
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Crizila Offline
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Quote:

Quote:

If you have to advance it 4-6 degrees for street use, you bought the wrong cam.




The cam designers are often recommending a 4-6 degree advanced installed centerline


Must be in pretty small print on the cam card.


Fastest 300
Re: Camshaft Installed Center Line question. [Re: Crizila] #1590989
03/11/14 12:28 AM
03/11/14 12:28 AM
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you guys are confusing the OP's numbers. The LSA is 112 not the ICL.

If all the manufacturing tolerances are correct for the cam, dowel, sprockets, chain, crank keyway.... The ICL would be 108º BUT without seeing the raw cam card numbers who knows.

IMHO no camshaft should ever be put in without a degree wheel.

I think cam companies recommend the 4º advance is because the vehicle is always heavier than thought, has less compression, less stall, less gear, etc. They've adjusted for end user optimism

Re: Camshaft Installed Center Line question. [Re: Crizila] #1590990
03/11/14 12:58 AM
03/11/14 12:58 AM
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Sport440 Offline
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Quote:

Quote:

Quote:

If you have to advance it 4-6 degrees for street use, you bought the wrong cam.




The cam designers are often recommending a 4-6 degree advanced installed centerline


Must be in pretty small print on the cam card.




Comp Cams, gives a ICL of 4* advanced for all thier cams, or on some its ground in. Mopar Cams recommend 2* advanced on All their cams.

Advancing the cam is not just a Moparts thing.

Further, its a way to make up for chain stretch and also make a high performance cam more streetable. The cam companies, agree and have now been grinding the advance in. Whats that tell you?



Further ive run Smaller cams ,but have run better with bigger cams advanced.

Ive never liked the Quote, "That if you have to advance your cam 4*, you need a Smaller cam"

Its flat out wrong. Now make that Quote 10*, Im with you.

Last edited by Sport440; 03/11/14 01:01 AM.
Re: Camshaft Installed Center Line question. [Re: TS3303] #1590991
03/11/14 02:00 AM
03/11/14 02:00 AM
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Quote:

you guys are confusing the OP's numbers. The LSA is 112 not the ICL.

If all the manufacturing tolerances are correct for the cam, dowel, sprockets, chain, crank keyway.... The ICL would be 108º BUT without seeing the raw cam card numbers who knows.

IMHO no camshaft should ever be put in without a degree wheel.

I think cam companies recommend the 4º advance is because the vehicle is always heavier than thought, has less compression, less stall, less gear, etc. They've adjusted for end user optimism





I agree that you see alot of people confuse the Lobe Seperation Angle (LSA) with the Installed Centerline (ICL) and get the cam in wrong. But you should always degree the cam as just manufactors tolorances can have it off some and unless you degree it you will never know where it really is and if your leaving some performance on the table. Ron

Re: Camshaft Installed Center Line question. [Re: Michael Ecks] #1590992
03/11/14 02:15 AM
03/11/14 02:15 AM
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Sport440 Offline
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Quote:

I just bought a Lunati Voodoo camshaft to replace the damaged old comp cams stick in my 360.

The voodoo cam lists a LSA of 112 and an ICL of 108, which I realized and it shows on the cam card as 4 degrees advanced.

Does this mean that if I use the crank and cam sprocket "dot-to-dot" as a baseline for installing it, that is ground to be set up close to set up there without using the 4 dgree advanced keyway in the sprocket?

Or does it mean they recommend installing it at four degrees advanced using the crank sprocket keyway to get 108, but "dot-to-dot" would put it at 112.

I know it needs to be properly degree-ed in to be sure. Just wondering where to start as far as setting it up.




It depends whether or not Lunati grinds thier cams with 4* advance in them.

If they do, Dot to Dot is the start. If they dont, the 4* advance Keyway will be the start. Then, Degree and Adjust from there!!

Also, you may consider your "overall combo" and adjust further or less based on your experience.

Re: Camshaft Installed Center Line question. [Re: Crizila] #1590993
03/11/14 02:44 AM
03/11/14 02:44 AM
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GTX MATT Offline
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Quote:

Quote:

Quote:

If you have to advance it 4-6 degrees for street use, you bought the wrong cam.




The cam designers are often recommending a 4-6 degree advanced installed centerline


Must be in pretty small print on the cam card.




Look at any of Comp Cams 110 degree LSA cams, almost every one of them has a recommended intake centerline angle of 106 degrees, AKA 4 degrees advanced.


Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
Re: Camshaft Installed Center Line question. [Re: Sport440] #1590994
03/11/14 02:46 AM
03/11/14 02:46 AM
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Quote:

Ive never liked the Quote, "That if you have to advance your cam 4*, you need a Smaller cam"

Its flat out wrong. Now make that Quote 10*, Im with you.




Exactly


Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
Re: Camshaft Installed Center Line question. [Re: GTX MATT] #1590995
03/11/14 09:22 AM
03/11/14 09:22 AM
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Quote:


Look at any of Comp Cams 110 degree LSA cams, almost every one of them has a recommended intake centerline angle of 106 degrees, AKA 4 degrees advanced.




My comp roller is exactly as GTX said. Dot to Dot came in a 106. The advance is figured in already. So the OP's cam may come in at 104 when lined up.

Re: Camshaft Installed Center Line question. [Re: 80fbody] #1590996
03/11/14 09:37 AM
03/11/14 09:37 AM
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Quote:

Quote:


Look at any of Comp Cams 110 degree LSA cams, almost every one of them has a recommended intake centerline angle of 106 degrees, AKA 4 degrees advanced.




My comp roller is exactly as GTX said. Dot to Dot came in a 106. The advance is figured in already. So the OP's cam may come in at 104 when lined up.




I would say you got lucky.

Re: Camshaft Installed Center Line question. [Re: Dodgeguy101] #1590997
03/11/14 11:54 AM
03/11/14 11:54 AM
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The last cam I did I got a surprise. It was way off, and I had to retard it to get back to 103! Luckily, it was a pig of a 350 SBC that needed all the cylinder pressure it could get. So for my put it in straight up dot to dot, check it, then if it is a stock short block which tend to be low on compression, I would advance it to less than 108, maybe 104 as a starting point. If you think the cam is fairly modest for the surrounding parts, gears, etc, then try 108. For the most part, advanced won't hurt you as much as going retarded.


8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
Re: Camshaft Installed Center Line question. [Re: 80fbody] #1590998
03/11/14 11:57 AM
03/11/14 11:57 AM
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Crizila Offline
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Quote:

Quote:


Look at any of Comp Cams 110 degree LSA cams, almost every one of them has a recommended intake centerline angle of 106 degrees, AKA 4 degrees advanced.




My comp roller is exactly as GTX said. Dot to Dot came in a 106. The advance is figured in already. So the OP's cam may come in at 104 when lined up.


"The advance is figured in already" - and that is where a lot of the confusion comes in on this subject. That is also why you should start with the cam card specs when installing a cam - unless you have a SOLID, FACTUAL reason to deviate from it. Doing it automatically on every cam you install for the reasons listed in this thread aint good enough - for me. Those that do that will never know if they made improvements or not. JMO. I still like almost everyone here

8069850-camdegreeing.jpg (85 downloads)

Fastest 300
Re: Camshaft Installed Center Line question. [Re: Crizila] #1590999
03/11/14 12:17 PM
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Quote:

Quote:

Quote:


Look at any of Comp Cams 110 degree LSA cams, almost every one of them has a recommended intake centerline angle of 106 degrees, AKA 4 degrees advanced.




My comp roller is exactly as GTX said. Dot to Dot came in a 106. The advance is figured in already. So the OP's cam may come in at 104 when lined up.


"The advance is figured in already" - and that is where a lot of the confusion comes in on this subject. That is also why you should start with the cam card specs when installing a cam - unless you have a SOLID, FACTUAL reason to deviate from it.




Exactly, you don't know if the advance is figured in accurately. You need to check it. The bottom line is if the recommended ICL is 106, you should start at 106.


Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
Re: Camshaft Installed Center Line question. [Re: GTX MATT] #1591000
03/11/14 01:01 PM
03/11/14 01:01 PM
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Quote:

Quote:

Quote:

Quote:


Look at any of Comp Cams 110 degree LSA cams, almost every one of them has a recommended intake centerline angle of 106 degrees, AKA 4 degrees advanced.




My comp roller is exactly as GTX said. Dot to Dot came in a 106. The advance is figured in already. So the OP's cam may come in at 104 when lined up.


"The advance is figured in already" - and that is where a lot of the confusion comes in on this subject. That is also why you should start with the cam card specs when installing a cam - unless you have a SOLID, FACTUAL reason to deviate from it.




Exactly, you don't know if the advance is figured in accurately. You need to check it. The bottom line is if the recommended ICL is 106, you should start at 106.




The reason I say advance it even farther is that any
SB street car needs all the low end torque you can
find and that is done by advancing it a bit more..
and I do understand that the ICL vs the LSA... the
108 is now the the zero point(it already has the 4*
built in.. if you were to use the dot to dot with
it at 0 it would come up to 108 not 112(if all the
stuff is made right)

Re: Camshaft Installed Center Line question. [Re: MR_P_BODY] #1591001
03/11/14 02:01 PM
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Posts: 9,910
Eighty Four, PA
It's all simple math,using the split centerline method adjust cam timing to the MFGs designed specifications,then depending on your desired use or performance outcome you can adjust from there.This way you will be compensating for any and all variances in all the related componants used and the baseline starting point can be established and changes can be refrenced from that point.

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