C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Oct 1, 2009 | 09:36 PM
  #21  
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Originally Posted by Project80
Was the engine turning at normal cranking speed when you did the compression test?
Yes. About 5 rotations at regular speed
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Old Oct 1, 2009 | 10:47 PM
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time for a tear down
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Old Oct 1, 2009 | 11:29 PM
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Originally Posted by GDaina
time for a tear down
yeah...mise well. Just got the car and drove it straight to the garage. Not even a test drive. Block appears to be out of a 65 vette so maybe I should preserve it and start new?
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Old Oct 2, 2009 | 12:16 AM
  #24  
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what did you get?
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Old Oct 2, 2009 | 12:24 AM
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Originally Posted by GDaina
what did you get?
68 vert...non original motor
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Old Oct 2, 2009 | 11:15 AM
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at least displacement is correct...if it's a 65 block, may be worth some $$$$$ to NCRS type...
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Old Oct 2, 2009 | 12:35 PM
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Originally Posted by GDaina
at least displacement is correct...if it's a 65 block, may be worth some $$$$$ to NCRS type...
Here's the block numbers:
Block is GM 3782870 Pad is FI03IS
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Old Oct 2, 2009 | 01:17 PM
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Originally Posted by Project80
Just checking about the compression test, you mentioned that it was turning over slowly on the first turn. Was the engine turning at normal cranking speed when you did the compression test?


All your numbers are low and your two way out of line cylinders are on different sides of the engine, so when you did this check did you have the carb butterflies wide open? If not you could get goofy numbers like you have.
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Old Oct 2, 2009 | 02:37 PM
  #29  
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Originally Posted by Manuel Azevedo
All your numbers are low and your two way out of line cylinders are on different sides of the engine, so when you did this check did you have the carb butterflies wide open? If not you could get goofy numbers like you have.
I'm thinking if the butterflies are open the numbers could be even lower?
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Old Oct 2, 2009 | 02:58 PM
  #30  
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Originally Posted by GDaina
I'm thinking if the butterflies are open the numbers could be even lower?

Not really. You are allowing the full air charge in with them open for the highest reading and one that is the most consistane also. Close them and you do not fill the cylinder completely.
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Old Oct 3, 2009 | 12:27 AM
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Well hell...got tired of troubleshooting so I just...



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Old Oct 3, 2009 | 12:45 AM
  #32  
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eweeeee that is nasty looking...

Block 1965 passenger 250, 300 horse
1965 Chevelle 250, 300 horse
1965 Vette 250, 300, 365, 375 horse

2 bolt main N on main bearig caps indicates nodular crank lack of N indicates forged crank

flint 10th month IS for suffix, cant find it only one that's listed is for a passenger 427 385 horse

Last edited by GDaina; Oct 3, 2009 at 01:01 AM.
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Old Oct 3, 2009 | 01:31 AM
  #33  
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Originally Posted by GDaina
eweeeee that is nasty looking...
and thanks for the decode. Suppose the short block would be worth anything to someone with a 65?
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Old Oct 3, 2009 | 02:09 AM
  #34  
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No wonder it is tired.....Fram filter.
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Old Oct 3, 2009 | 02:58 AM
  #35  
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Originally Posted by Goody
No wonder it is tired.....Fram filter.


But it seems that the oil filter is the only part which looks good !
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Old Oct 3, 2009 | 07:49 AM
  #36  
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And to think there was a brand new set of Jet Hot Hooker Sidepipes bolted to it!
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Old Oct 3, 2009 | 08:51 AM
  #37  
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Goody, I have been using a Fram TG5 because it is longer than the specified TG30 and has an anti-drain-back valve.
What filter name & number would you use if the Fram is not up to par?
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Old Oct 4, 2009 | 01:05 AM
  #38  
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Well...tore the motor completely down tonight. I truly can not believe this pos motor was still running. Someone had no clue pics to follow
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Old Oct 4, 2009 | 03:38 AM
  #39  
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Just a question : how many miles on this engine, if you know ?
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Old Oct 4, 2009 | 12:34 PM
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Originally Posted by 73StreetRace
Just a question : how many miles on this engine, if you know ?
no clue. It has been rebuilt though at some point. Noticed someone used a punch to number rod caps.
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