Hi gurus

Finally figured out some of the cam specs by degreeing, and not sure if
this cam is advanced 3 degrees or none, and not sure if I need to measure/verify the lobe spread.

Here is the card info

CLevite Cam 2291380

Intake cam lift 270 I meas. 266
Exh cam lift 276 I meas 274

Intake & Exh duration 244

Int valve open 8 I get 8
Int valve close 26 I get 25
Ex valve open 33 I get 33
Ex valve close 10 I get 12



Intake center line 106 I get 106
Exh lobe center 112 I didn't check
Lobe Spread 109

1)IS this cam pre advanced from Clevite?

2)Do I need any more measurements, or am I all set?

3)Based on the below mods, would advancing even be that necessary?

It will just be a daily driver, and economy is more important that quarter mile stats.

The head is ported, with double springs, std size valves
9.0:1 compression,
split exhaust manif (not sure on duals or a collector)
2 inch exh pipe(2)
Will start with a 1 bbl carb
14 inch tires
Not sure but probably the 2.76 rear.

4) With this setup, are duals really necessary? How much hp could one
expect to pick up with honest duals vs. a collector?

THANKS, PEACE. Donation Sent!!!

It looks as if the cam is "straight up" according to your cam card specs. Your lobe spread, or lobe seperation angle is fixed, and cannot be changed by advancing or retarding the cam, only by regrinding. What standard are they giving these specs to you...@.020 lift, @.050 lift, etc.

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There's no such thing as too much cam....only not enough engine!

At .05"

Looks like that cam could be advances a couple of degrees more...
What is the intake close point, when checked at .010 lash?
DD

I don't know how to check that. Sounds like I need to put head and rocker arms on......
Advancing bumps up low end torque, but what does it do to economy
at in town speeds? That's likely where most of my driving will be.

If I left it straight up at 106, would mid range torque increase that much, and what would that do to hwy fuel economy, given above car's data?

With a cr of 9 to 1, am I really going to notice any effect by advancing?

If you really have 9 to 1 static compression then this cam is going to give you a pretty high DCR either way...
That said, try it where it is... there won't be a big difference.
DD

To my eye (and per my parts catalogues) this is a stock '71-'80 camshaft. Doc, others? Agree, disagree?

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

The card says Dodge, Chrysler car, truck '60-82.

Static compression may be 8.9 :1.

Brings up a good lesson: for all you guys and gals, double checking your numbers is a good habit - I measured my piston to deck distance prior to dissasembly. I told the machinist how much to take off to get 9:1. I put the new pistons in with the machined block, and "Hey, man!". Pistons were about .1" shorter than the originals. It cost me
$75 to get block re shaved. Never considered new piston height. Now I know better..........this whole project
has taught me lots of things about this motor I never knew before.

And thanks to all you "tool using mammals", I avoided lots of other mistakes. I only spent $75 unneccessarily. PEACE

Bzzt! No such cam. '60-'80, yes. Starting in '81, the slant-6 got hydraulic lifters and a different, non-interchangeable cam.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I don't know how to check that. Sounds like I need to put head and rocker arms on......
Advancing bumps up low end torque, but what does it do to economy
at in town speeds? That's likely where most of my driving will be.

If I left it straight up at 106, would mid range torque increase that much, and what would that do to hwy fuel economy, given above car's data?

With a cr of 9 to 1, am I really going to notice any effect by advancing?