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35 std 8 Cam chain timing to the crank
#1
Not too shy to talk
Not too shy to talk

Digger Dave
See User information
I have been reading archive documents for Cam chain timing my 35 std 8. I have a document for a 14th series. I found the Archives here to match, the following.

#1 Inlet opens at 30 deg BTDC.
#1 Exhaust closes 30 deg ATDC.
and the 1 dot on each of the Cam and Crank to line up when #1 piston is at TDC and confirmed by the flywheel marking.

My Cam that came with my original engine and "as installed"
this is what I have and my results.
#1 Inlet opens 2 deg BTDC
#1 Exhaust closes 5 deg BTDC.
And I have 2 dots on each of the crank and cam.

My question is
Has my cam been reground incorrectly during a prior horrible rebuild in the early 90's or Does anyone have a document that confirms what I have found as being normal and correct.

Now the car ran good as a "parade motor" but I had nothing to compare it to for power.

I do have a second motor that I believe had never been molested. I could pull its Cam and install it and see what its timing is, but that will require several steps backwards and several hours.

Attach file:



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Posted on: 2023/10/15 13:19
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Re: 35 std 8 Cam chain timing to the crank
#2
Not too shy to talk
Not too shy to talk

Digger Dave
See User information
Update. I have a 2nd engine (that I bought for the cylinder block) that I verified the Cam in it, is bone stock original. It checks out at all points noted in the Cam shaft timing specifications.

So, What I'm learning is, the guy/Mechanic that took the money from the wealthy Dr. (Surgeon) who paid to bring this car to very high point standard, modified the cam to what the mechanic thought would be better than what the Packard Engineers, after all their background, testing and training, could have done.

I have other post on here about the other bright ideas the mechanic thought were acceptable rebuild protocols. I have receipts for about 10K in 1991 when this overrated engine builder stole from the Dr.

So, be sure to know your engine rebuilder and if he's a bail wire and duct repair guy or a master mechanic.

Well at least it lasted about 7k miles and 30 years.

Posted on: 2023/10/21 16:57
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