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Re: Degreeing a cam in.. [Re: BobsProFab] #437241
08/14/09 08:07 AM
08/14/09 08:07 AM
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick Offline
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patrick  Offline
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Grand Haven, MI
Quote:

i do it @ .050 before and after max lift
add then divid by 2

Bob




that's how I did mine. find max lift w/ the dial indicator, 0 it out, then go .050 on either side, taking degree measurements. add them up and divide by 2....I was checking at the lifter, heads weren't on the motor yet.

Last edited by patrick; 08/14/09 08:10 AM.

1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
Re: Degreeing a cam in.. [Re: WILD BILL] #437242
08/14/09 09:21 AM
08/14/09 09:21 AM
Joined: May 2006
Posts: 205
Chicago,Illinois
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nosboy Offline
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Chicago,Illinois
ABSOLUTELY CORRECT BILL!!! You HAVE to find the TDC of the PISTON and NOT the mark on the balancer.. I've seen balancers OFF BIGTIME!!!. Also, use the LIFTER and NOT the pushrod or rocker or valve.. There is angles involved in the relative positions of pushrods,rockers,,etc,etc,etc, that WILL throw off your readings... the LIFTER ITSELF,,,, not the piston inside the lifter,, the OUTSIDE WALL of the lifter... I put my cam at 102 and I am really impressed with the performance!!!! I have a 5000 stall convertor and the cam wakes up WAY BEFORE 5000 and I waste some power,,,but,, my challenger still runs 10:40's CONSISTENTLY and it idles pretty good sometimes.. The trick is to LEAVE the mechanical advance springs IN the distributor and NOT TO PIN the dist together,,, so it will start RIGHT AWAY all the time!!! the advance kicks in at around 1800 rpms and my car runs between 5000 and 7000 all the time

Re: Degreeing a cam in.. [Re: BobsProFab] #437243
08/14/09 09:44 AM
08/14/09 09:44 AM
Joined: Jan 2003
Posts: 17,918
Akron, Ohio
ProSport Offline
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Akron, Ohio
Quote:

i do it @ .050 before and after max lift
add then divid by 2

Bob




This is how I do it.


1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual
Re: Degreeing a cam in.. [Re: ProSport] #437244
08/14/09 10:01 AM
08/14/09 10:01 AM

A
Anonymous
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The big thing to remember here is --degree the cam to know where its at SO you know which way to go - if need be - AFTER you run it some--The recommended spot is a good GUESS at where it should be to get the desired results BUT if you are say 1/8 miler vs. 1/4 etc you may need to advance or retard to get the exact performance out of it that you are looking for--I have seen BIG inch engines make 50 Ft lbs more on the dyno by retarding a little I have seen small block 1/8 milers tear the chrome off the rear bumper and pull like a rocket in the 1/8 but run out of steam in the 1/4 so---going crazy over a degree or two is USELESS--a good smart racer will move it around a little to FIND where it needs ( after RUNNING it )to be for his combo and desired results OR if it dynos great and you are winning races WHO cares what it is degreed at? - except to be able to put it back in the same place after teardown - Getting picky over HOW to get there is missing the point IMO --just do whatever you do the same way every time. One of the best ways - accurate every time - is with the tool in the lifter bore that holds the mic and measures straight off the lobe--- make it run good for real --not on paper

Last edited by crabman173; 08/14/09 10:07 AM.
Re: Degreeing a cam in.. [Re: VernMotor] #437245
08/14/09 11:35 AM
08/14/09 11:35 AM
Joined: Feb 2003
Posts: 8,020
Pangaea
B5 Bee Offline
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Pangaea
When checking .050 before and after, turn it in it's normal direction, check .050 before, then .050 after, all in one direction. This will keep the chain tight and not add in the chain slop to your readings that will happen if you turn it back and forth.

Re: Degreeing a cam in.. [Re: B5 Bee] #437246
08/14/09 11:39 AM
08/14/09 11:39 AM
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL Offline
Senior Member of the Junior Dragster Club
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BROOK PARK, OH
Quote:

When checking .050 before and after, turn it in it's normal direction, check .050 before, then .050 after, all in one direction. This will keep the chain tight and not add in the chain slop to your readings that will happen if you turn it back and forth.






Forgot about that

Last cam I degreed was in the Jr and it has no chain

Re: Degreeing a cam in.. [Re: ] #437247
08/14/09 01:27 PM
08/14/09 01:27 PM
Joined: Oct 2006
Posts: 527
alaska,usa
9
9secondsatellite Offline
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Posts: 527
alaska,usa
Quote:

The big thing to remember here is --degree the cam to know where its at SO you know which way to go - if need be - AFTER you run it some--The recommended spot is a good GUESS at where it should be to get the desired results BUT if you are say 1/8 miler vs. 1/4 etc you may need to advance or retard to get the exact performance out of it that you are looking for--I have seen BIG inch engines make 50 Ft lbs more on the dyno by retarding a little I have seen small block 1/8 milers tear the chrome off the rear bumper and pull like a rocket in the 1/8 but run out of steam in the 1/4 so---going crazy over a degree or two is USELESS--a good smart racer will move it around a little to FIND where it needs ( after RUNNING it )to be for his combo and desired results OR if it dynos great and you are winning races WHO cares what it is degreed at? - except to be able to put it back in the same place after teardown - Getting picky over HOW to get there is missing the point IMO --just do whatever you do the same way every time. One of the best ways - accurate every time - is with the tool in the lifter bore that holds the mic and measures straight off the lobe--- make it run good for real --not on paper


measure off the lobe, go right to the source. the right tool and procedure will make it accurate every time.

Re: Degreeing a cam in.. [Re: Hunted Duck] #437248
08/14/09 05:50 PM
08/14/09 05:50 PM
Joined: Nov 2003
Posts: 7,348
Mt.Vernon ,Ohio
VernMotor Offline OP
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Mt.Vernon ,Ohio
Quote:

Quote:

i do it @ .050 before and after max lift
add then divid by 2

Bob


This is how I do mine also.




I would like to see picture of you guys degree wheels..something don't add up here. just to take the 2 numbers and add and then div. Like my numbers..60 and 35 deg add them =95 div them by 2 =47 ???




Re: Degreeing a cam in.. [Re: VernMotor] #437249
08/14/09 06:29 PM
08/14/09 06:29 PM
Joined: Feb 2003
Posts: 8,020
Pangaea
B5 Bee Offline
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Pangaea

I THINK this is what you have.

Your 60* looks good.
Look at your 35*, it is really 145*, once the pointer gets to 90*, it counts backwards, you have to ignore the printed numbers and continue counting the marks upwards from 90 to the mark that you see as 35*, it will be 145*.

60+145=205

205/2=102.5


A wheel that is marked a full 360 makes it easier to figure.

Re: Degreeing a cam in.. [Re: B5 Bee] #437250
08/14/09 06:41 PM
08/14/09 06:41 PM
Joined: Jan 2007
Posts: 3,695
nc
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emarine01 Offline
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nc
I think Cab is right, the motor does not care what the lifter is doing , its the valve opening that counts, never looked at it that way, I always measure @ the lifter , I wonder now how much difference the is between the 2 points in degrees?

Re: Degreeing a cam in.. [Re: B5 Bee] #437251
08/14/09 10:03 PM
08/14/09 10:03 PM
Joined: Nov 2003
Posts: 7,348
Mt.Vernon ,Ohio
VernMotor Offline OP
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Mt.Vernon ,Ohio
B5 bee thanks for looking at that..your math looks good. and you came up with something better than I did. thats why I want to see other degree wheel

Re: Degreeing a cam in.. [Re: VernMotor] #437252
08/14/09 10:04 PM
08/14/09 10:04 PM
Joined: Nov 2003
Posts: 7,348
Mt.Vernon ,Ohio
VernMotor Offline OP
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Mt.Vernon ,Ohio
emarine01 I going to find out..will check it out before the weekend is out..

Re: Degreeing a cam in.. [Re: VernMotor] #437253
08/14/09 10:46 PM
08/14/09 10:46 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Posts: 52,972
Romeo MI
Jamie I believe this is the one I have... if you
look at the image you will see its a 180 degree and it
shows area's that the valve event should be happening
your issue is every 90* it starts again
http://www.summitracing.com/parts/SUM-G1057/?image=large

Re: Degreeing a cam in.. [Re: MR_P_BODY] #437254
08/14/09 10:48 PM
08/14/09 10:48 PM
Joined: Nov 2004
Posts: 7,274
s.w.fl
B
bonefish Offline
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a

Re: Degreeing a cam in.. [Re: VernMotor] #437255
08/14/09 10:51 PM
08/14/09 10:51 PM
Joined: Feb 2004
Posts: 4,501
Gainesville,FL
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goldmember Offline
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I check the ICL first then check the numbers at .050,then check the exhaust lobe using the same method to confirm the LSA.

Re: Degreeing a cam in.. [Re: goldmember] #437256
08/14/09 11:27 PM
08/14/09 11:27 PM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
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Ontario, Canada
This is my small 11" wheel only one that will fit in the car. Have a bigger 14 or 16" real cool!

Last edited by Dodgem; 08/14/09 11:28 PM.
Re: Degreeing a cam in.. [Re: Dodgem] #437257
08/14/09 11:31 PM
08/14/09 11:31 PM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
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Ontario, Canada
crank sprocket from Mancini's is cats butt!

Re: Degreeing a cam in.. [Re: Dodgem] #437258
08/14/09 11:31 PM
08/14/09 11:31 PM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
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Ontario, Canada
3

Re: Degreeing a cam in.. [Re: Dodgem] #437259
08/14/09 11:32 PM
08/14/09 11:32 PM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
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4

Re: Degreeing a cam in.. [Re: Dodgem] #437260
08/14/09 11:33 PM
08/14/09 11:33 PM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
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5

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