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Author Topic: Degreeing a cam with the heads on...  (Read 5851 times)
dsrtjeeper
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« on: June 02, 2016, 03:09:27 pm »

I'm having issues with my 347 and want to recheck cam timing events. My cam is asymmetrical. Can I do this by removing one valve cover and say #5 pushrods and rockers? I would use a dial indicator with a setup to ride on the lifter. Where can the magnetic indicator base be solidly mounted to do so?

Any negatives to using a smaller diameter degree wheel so I don't have to remove accessories and such from heads?
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RunninHorse
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« Reply #1 on: June 02, 2016, 03:28:47 pm »

Interesting.  I wouldn't trust any method of finding TDC without access to the piston itself.
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I'm Rob.  Working on my '93 Reef Blue coupe.  Stock internal 302, 80 MAF, 75 TB, Victor 5.0, High Ports, 30# inj., B303, 1.6s, Tremec TKO 3550, Quicktime bell, Fidanza Al flywheel, stage 3 ceramic clutch, & 4.10s.  12.68 @ 111.69
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dsrtjeeper
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« Reply #2 on: June 02, 2016, 03:34:52 pm »

Interesting.  I wouldn't trust any method of finding TDC without access to the piston itself.

TDC will be verified with a piston stop threaded into spark plug hole. I'm actually wanting to follow the lifter up each side of the intake and exhaust lobe and find out where valve timing is at @.050".
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RunninHorse
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« Reply #3 on: June 02, 2016, 03:45:12 pm »

TDC will be verified with a piston stop threaded into spark plug hole. I'm actually wanting to follow the lifter up each side of the intake and exhaust lobe and find out where valve timing is at @.050".

Ah, cool.  Didn't know they made those.  Was imagining some rigged up dial indicator stuck through the spark plug hole.
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I'm Rob.  Working on my '93 Reef Blue coupe.  Stock internal 302, 80 MAF, 75 TB, Victor 5.0, High Ports, 30# inj., B303, 1.6s, Tremec TKO 3550, Quicktime bell, Fidanza Al flywheel, stage 3 ceramic clutch, & 4.10s.  12.68 @ 111.69
'66 F100 shortbed, 352ci, 3 on the tree - on hold
'65 Coupe rolling chassis - on hold
Parts I'm selling: 
Hardened Push Rods - Trick Flow 6.2" .080 - $60
Misc. Fox Body Interior Pieces
dsrtjeeper
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« Reply #4 on: June 02, 2016, 05:33:03 pm »

Also; is a crankshaft socket needed for a one time deal or can I just use the crank bolt to fasten degree wheel to balancer?
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Joel5.0
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« Reply #5 on: June 02, 2016, 08:46:35 pm »

Yes you can...... for the crankshaft bolt, you will need a longer bolt so you can lock the crankshaft w/out disrupting the degree wheel position after true-TDC is set. Or as explained/shown in http://www.4x4wire.com/toyota/tech/cam_degreeing/ ......even though it is for an import engine, BTSTDT myself many times and it works, BTW.
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ACRONYMS:
LUK  LMK  JIC  BTSTDTRT  YCYDYP  NFI-YTM  SPOBI, and the classic... DILLIGAS

'86 Mustang GT, X-303 cam, Holley DP 700, RG Tran., 289 Heads   Ford Smilie 2


Quote from: Joel5.0
The right to be stupid is inalienable for sure however, there is no such thing as a right to impose stupidity onto others
Great Thoughts will Overwhelm a Feeble Mind
There is never money to do it right, but there's always money to do it over.
Knowledge based on external evidence is unreliable.
He, who doesn't ask, does not deserve an answer.
A mind is like a parachute it only works when it is open.  (oldmanjoe)
If you can't explain it simply, you don't understand it well enough. (Albert Einstein)
Tuning on a Dyno for the track, is like swim practice in a bathtub.
I can explain it for you, but I can't understand it for you. (90lxcoupe)
The proof of understanding is the ability to explain it. (H. Torruella)
Ignorance is bliss, but stupidity is orgasmic.
Fraud and falsehood only dread examination. Truth invites it. (Samuel Johnson)
The chaotic resistance of the opponents leads to the conclusion that they are not prepared to meet the challenge. The problem is already much more psychological then technological. [Bojidar Djordjev]
Individuals are rational and humane... Crowds are reactionary and barbaric. (Jason)
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dsrtjeeper
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« Reply #6 on: June 02, 2016, 09:48:36 pm »

I have a magnetic base dial indicator. With the heads on; what are you guys doing to steady it on the head? I'm doing this with head on.
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Jeff351w
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« Reply #7 on: June 02, 2016, 10:14:14 pm »

The last time I did mine I did it with the heads on but the intake pulled.  That way, the magnetic base could sit in the lifter valley and take my measurements directly from the lifter.

BTW, I'm assuming you have aluminum heads.
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dsrtjeeper
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« Reply #8 on: June 02, 2016, 10:33:08 pm »

The last time I did mine I did it with the heads on but the intake pulled.  That way, the magnetic base could sit in the lifter valley and take my measurements directly from the lifter.

BTW, I'm assuming you have aluminum heads.

Yeah; TFS heads. I was hoping I didn't have to pull the intake but it won't kill me.
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Joel5.0
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« Reply #9 on: June 03, 2016, 07:01:53 am »

You can remove the rockers and use the dial indicator on the pushrod..... just make sure you also remove the rockers and PRs from the other valves so the magnetic base is not moved. BTSTDT.
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ACRONYMS:
LUK  LMK  JIC  BTSTDTRT  YCYDYP  NFI-YTM  SPOBI, and the classic... DILLIGAS

'86 Mustang GT, X-303 cam, Holley DP 700, RG Tran., 289 Heads   Ford Smilie 2


Quote from: Joel5.0
The right to be stupid is inalienable for sure however, there is no such thing as a right to impose stupidity onto others
Great Thoughts will Overwhelm a Feeble Mind
There is never money to do it right, but there's always money to do it over.
Knowledge based on external evidence is unreliable.
He, who doesn't ask, does not deserve an answer.
A mind is like a parachute it only works when it is open.  (oldmanjoe)
If you can't explain it simply, you don't understand it well enough. (Albert Einstein)
Tuning on a Dyno for the track, is like swim practice in a bathtub.
I can explain it for you, but I can't understand it for you. (90lxcoupe)
The proof of understanding is the ability to explain it. (H. Torruella)
Ignorance is bliss, but stupidity is orgasmic.
Fraud and falsehood only dread examination. Truth invites it. (Samuel Johnson)
The chaotic resistance of the opponents leads to the conclusion that they are not prepared to meet the challenge. The problem is already much more psychological then technological. [Bojidar Djordjev]
Individuals are rational and humane... Crowds are reactionary and barbaric. (Jason)
The person who says it cannot be done should not interrupt the person doing it. –Chinese Proverb
Nothing sways the stupid more than arguments they can't understand - Cardinal de Retz
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