Resolution to this issue is in post #26. Camshaft installed in wrong position.
Scratching my head on this one. Any advice appreciated.
NOTE: The motor in question came out of my 86 that was previously rebuilt and driven approx. 15k miles with no issues. The only thing changed before installing in the '84 was the camshaft. I went from an 'F' motorsport cam to a stock 'speed-density' (86-88 HO) cam.
The combo is roller 306 block, GT-40 iron heads, 1.7 motorsport roller rockers, push rod length unknown at this time... I still need to measure although i suspect stock.
I installed this engine in my '84 over a decade ago and have just now recently gotten back into the project and got it *sorta* running. It was making some valve-train noise and running overall poorly (rough idle) so I pulled the covers to adjust the valves. In the process of doing so, discovered all 8 intake push rods were bent. Exhaust are fine. It's been 10 years but i'm willing to bet I installed the cam correctly. I did not degree the cam when installing... just brought up to TDC on #1 and matched the dots on the cam & crank sprockets per the shop manual instructions. Didn't think it would be an issue with a stock cam. Nothing binding or felt strange when turning over by hand before the initial fire-up.
Did I make a mistake in assuming going from the lumpy 'F' cam down to a stock smooth-idle cam that my pushrod length would not be an issue? Nothing else was changed. Heads were not pulled, just front cover & intake for cam removal/installation. I am unaware of what valve springs it currently has. I'd guess they'e a little stiffer than stock, but that shouldn't pose an issue here, right?
Can't seem to find any specs on the speed-density roller cam. Does anyone happen to have the lift/duration #'s for that particular cam? I know they were slightly different than the later 'mass-air' roller cams from 89-93. I need to do the math with the 1.7 rockers to factor out if that's my issue.
Thanks!
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