Quote:
Originally Posted by Shockwave78
Installed the new rocker nuts and....... still no power. Might be a bit better but not by much. On the highway at WOT it cant get past 60. Also on the highway cruising at part throttle it missed or coughed 3 or 4 times, on the 30 minute test drive, that was the only time. The last thing I noticed is, at WOT when the top flap of the secondaries open as much as they can (which isn't much, maybe a quarter open) there is white fuel vapor being blown out of the top of the carb, enough to hit the windshield and cover it in gas droplets. I cant tell if it is out of the primaries or secondaries.
And to add insult to injury, my oil pressure gauge stopped working and is stuck at 60 psi
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Did you do the adjustment right with the new nuts? Positive the engine was a TDC of compression stroke and you adjusted the correct lifters based on that link? Just asking since I/we dont know how much mechanical experience you have. I recently tried to help a guy from another country adjust his rockers and even after sending the link & a couple youtube videos... he just tightened all the rockers to "zero lash" then added 1/2 turn to all the rockers at one time, didnt work out to well and took him a few tries to get it right, engine is running good for him now.
Also, if the crower lifters say 1/2 turn, thats what they should be set to... 1/2 turn past zero lash is not a lot, most HFT lifters recommend that unless they are the type that say 1/4 turn.
Leak down tester- Check with local auto part stores, they may offer a free rental for this. or get the warm cranking compression numbers to help others on here diagnose the issue.
Gas droplets on the windshield- I have had that happen on a couple engines that ran great when I would remove the shaker scoop & add a velocity stack to look cool
would very get small amounts of gas droplets from holley & q-jet carbs when driving at normal speeds... reverberation or not, the engine ran great with or without the air cleaner removed so i dont think thats part of the issue your having.
After trying some of the tests mentioned above to identify the issue, you may need to pull the timing cover to check cam timing & timing chain alignment... but if you are sure the chain/gears were installed right, i dont think not degreeing the cam is causing the problems, i have installed cams straight up that run great. its easy to get the timing chain off a tooth or even installed 180 off if following chevy manuals.