If you were local it would be easy to diagnose, but lets start with the basics
viewtopic.php?f=36&t=767
viewtopic.php?f=36&t=63
this is the most consistently accurate I.R temp gun I've used for testing[/img]
http://www.testequipmentdepot.com/e...1100200223789&utm_content=All Extech Products
INFRARED TEMP GUN
whats the COMPRESSION TEST reading for each cylinder?
HOW did you adjust the valves?
CAN you post detailed pictures of EACH spark plug?
whats your FUEL PRESSURE?(does it stay steady as the rpms build?)
HAVE you verified the throttle blades in the carb and linkage fully open?
how are the carb FLOATS SET?
what air filter SIZE and is it clean?
is there water or crud in the gas or fuel filter?
whats the TOTAL IGNITION ADVANCE?
whats the VACUUM READ AT IDLE?
whats the VOLTAGE at the COIL?
AT WHAT rpm does the advance reach MAX advance?
WHAT is the exhaust back pressure reading? (IDLE and 4000rpm under load)
HOW did you determine true TDC or did you just assume the timing tab and damper are correct?
What color is the ignition spark?
what is YOUR OHMS reading on the plug wires?
whats your spark plug gap?
CARB JETS? METERING RODS?
HAVE you REPLACED the cap and ROTOR?
ANY indication of a MISS or BOG?
HAVE you tried a DIFFERENT CARB?
have YOU verified EACH cylinder is firing?
have you VERIFIED the FIRING ORDER IS CORRECT?
HAVE you VERIFIED the LASH/PRELOAD on the rockers RECENTLY, and are you sure the cam is not worn?
are you SURE the trans fluid and rear differential are filled to the correct levels?
whats the engine temp after it warms up?
whats the trans fluid temp?
I learned decades ago to swap to a 140 amp-200 amp alternator,
as the stock 75-105 amp alternators on muscle cars and earlier corvettes are marginal at best/
if you shop carefully they can usually be found locally at some alternator re-builders for under $150
both my corvettes have 200 amp versions purchased NEW for under $250
while that may be over-kill to some I find the electric fans on the corvette and ignition and head lights work noticeably better
http://www.ecklerscorvette.com/corvette-alternator-140-amp-chrome-power-master-1969-1982.html
http://www.dbelectrical.com/p-4516-high-output-chevy-3-wire-alternator-140-amp-65-85.aspx
http://www.centuryperformance.com/fueli ... g-140.html
your bound to notice I install links to useful info in most threads,
now obviously not all the info, posted in all threads will be helpful in all cases,
but you'll eventually come to realize the value of reading thru the info links.
theres a great deal of useful info, in those links
info that you might think is useless to you now, but you'll be amazed at the number of times in the future your going to say to yourself...., damn! I remember reading something about that, now where was that posted, and a brief search will turn up your info!, info you swore at the time was a waste of your time to read thru, I know that's been very common for me and I'm sure it will be for those guys that really want to learn how and why things work!.
viewtopic.php?f=36&t=767
viewtopic.php?f=36&t=63
this is the most consistently accurate I.R temp gun I've used for testing[/img]
http://www.testequipmentdepot.com/e...1100200223789&utm_content=All Extech Products
INFRARED TEMP GUN
whats the COMPRESSION TEST reading for each cylinder?
HOW did you adjust the valves?
CAN you post detailed pictures of EACH spark plug?
whats your FUEL PRESSURE?(does it stay steady as the rpms build?)
HAVE you verified the throttle blades in the carb and linkage fully open?
how are the carb FLOATS SET?
what air filter SIZE and is it clean?
is there water or crud in the gas or fuel filter?
whats the TOTAL IGNITION ADVANCE?
whats the VACUUM READ AT IDLE?
whats the VOLTAGE at the COIL?
AT WHAT rpm does the advance reach MAX advance?
WHAT is the exhaust back pressure reading? (IDLE and 4000rpm under load)
HOW did you determine true TDC or did you just assume the timing tab and damper are correct?
What color is the ignition spark?
what is YOUR OHMS reading on the plug wires?
whats your spark plug gap?
CARB JETS? METERING RODS?
HAVE you REPLACED the cap and ROTOR?
ANY indication of a MISS or BOG?
HAVE you tried a DIFFERENT CARB?
have YOU verified EACH cylinder is firing?
have you VERIFIED the FIRING ORDER IS CORRECT?
HAVE you VERIFIED the LASH/PRELOAD on the rockers RECENTLY, and are you sure the cam is not worn?
are you SURE the trans fluid and rear differential are filled to the correct levels?
whats the engine temp after it warms up?
whats the trans fluid temp?
I learned decades ago to swap to a 140 amp-200 amp alternator,
as the stock 75-105 amp alternators on muscle cars and earlier corvettes are marginal at best/
if you shop carefully they can usually be found locally at some alternator re-builders for under $150
both my corvettes have 200 amp versions purchased NEW for under $250
while that may be over-kill to some I find the electric fans on the corvette and ignition and head lights work noticeably better
http://www.ecklerscorvette.com/corvette-alternator-140-amp-chrome-power-master-1969-1982.html
http://www.dbelectrical.com/p-4516-high-output-chevy-3-wire-alternator-140-amp-65-85.aspx
http://www.centuryperformance.com/fueli ... g-140.html
your bound to notice I install links to useful info in most threads,
now obviously not all the info, posted in all threads will be helpful in all cases,
but you'll eventually come to realize the value of reading thru the info links.
theres a great deal of useful info, in those links
info that you might think is useless to you now, but you'll be amazed at the number of times in the future your going to say to yourself...., damn! I remember reading something about that, now where was that posted, and a brief search will turn up your info!, info you swore at the time was a waste of your time to read thru, I know that's been very common for me and I'm sure it will be for those guys that really want to learn how and why things work!.
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