C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old May 20, 2020 | 05:48 PM
  #21  
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This is a
Not
Correctly
Restored
Sting ray.
The engine is supposedly a 72 truck engine.
He just wants a reliable toy, and that is the mission.
A coolant recovery system is an improvement.
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Old May 20, 2020 | 06:17 PM
  #22  
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Originally Posted by Big2Bird
This is a
Not
Correctly
Restored
Sting ray.
The engine is supposedly a 72 truck engine.
He just wants a reliable toy, and that is the mission.
A coolant recovery system is an improvement.
N
C
R
S


Reply
Old May 20, 2020 | 06:20 PM
  #23  
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I am fairly certain his high speed miss is from the oil soaked carbon brush that is melting into goo.
At least the curve was dead on. 17* at idle, and linear to 36* at 2800 rpm.
But, for street use, a vacuum advance will be added.
I also found all the header bolts loose, so there is the ticking on pass side.
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Old May 20, 2020 | 06:41 PM
  #24  
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Anybody care to decipher?
I never bothered to learn this aspect.
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Old May 20, 2020 | 06:45 PM
  #25  
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Jeff
He wants a reliable toy ... a reservoir is a good thing & simple ... So why are points out?
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Old May 20, 2020 | 06:48 PM
  #26  
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Originally Posted by jackson
Jeff
He wants a reliable toy ... a reservoir is a good thing & simple ... So why are points out?
Lets just say he is not good with cars.
He wants me to look at a 68 Mustang next. I haven't touched one since 1973.

Last edited by Big2Bird; May 20, 2020 at 06:54 PM.
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Old May 20, 2020 | 06:51 PM
  #27  
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Originally Posted by Big2Bird
This is a
Not
Correctly
Restored
Sting ray.
The engine is supposedly a 72 truck engine.
He just wants a reliable toy, and that is the mission.
A coolant recovery system is an improvement.
Originally Posted by Capt. Shark
N
C
R
S

tread lightly ... I KNOW someone who Just got dinged for same sort of mention.
Reply
Old May 20, 2020 | 06:53 PM
  #28  
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Originally Posted by jackson
tread lightly ... I KNOW someone who Just got dinged for same sort of mention.
Reply
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Old May 20, 2020 | 07:07 PM
  #29  
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Old May 20, 2020 | 07:10 PM
  #30  
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Originally Posted by Big2Bird
Okay. Cooling system holds pressure, so I ordered a cap and a reservoir. The next thing is dual spals. I will hook one fan to the classic air, and one to the stat, That eliminates the shredded shroud and flex fan.
$459 seems to be the price from all the venders.
I ordered a new fuel sender, some tubing, inline filter and fittings to correct the fuel hazards encountered.
Adding vacuum advance for street, I still like the DUI unit, although I have had one come back with trashed tach gears.
He doesn't want a $950 MSD system, so that leaves HEI, or a tach drive with a pertronix/lectric limited trigger. Points are out.
With a DUI HEI, I would also have to delete, change the wiper motor to a later style for clearance.
You’re not going to enjoy the reservoir. For 73 it’s a 1 year only part with a different back profile. You either need to stack washers behind it so you can attach the bolts, or I can teach you the proprietary Mike method. You think zip tie wire looms are primitive
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Old May 20, 2020 | 07:12 PM
  #31  
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My favorite, the fuel system.
The filter sock has been cut off. The tank line is crazy.
There is an inline filter before the pump.
The pump is an old Holley? HP unit.
The steel line between the pump and carb can rub on the belt.(it flops around).
The pump return is disconnected.
I ordered a new sending unit, stock fuel pump, and will hard pipe the rest with an Earls inline filter.
Did I mention the "S" hose is pinched?
Yes. Just stock hose bent over.
Bubba DID do the fuel system.
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Old May 20, 2020 | 07:15 PM
  #32  
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Originally Posted by CA-Legal-Vette
You’re not going to enjoy the reservoir. For 73 it’s a 1 year only part with a different back profile. You either need to stack washers behind it so you can attach the bolts, or I can teach you the proprietary Mike method. You think zip tie wire looms are primitive

Like this plug wire alignment unit?
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Old May 20, 2020 | 07:22 PM
  #33  
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Originally Posted by Big2Bird
Like this plug wire alignment unit?
At least it’s isn’t attached to the header.
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Old May 20, 2020 | 07:26 PM
  #34  
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Originally Posted by CA-Legal-Vette
At least it’s isn’t attached to the header.

Like these melted on? I think they replaced this.
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Old May 20, 2020 | 09:06 PM
  #35  
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If a clutch fan cools it when you get it together why waste the money on electric fans. You would likely have to upgrade the wiring and alternator.
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Old May 20, 2020 | 09:29 PM
  #36  
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Originally Posted by 7t9l82
If a clutch fan cools it when you get it together why waste the money on electric fans. You would likely have to upgrade the wiring and alternator.
It has a flex fan The shroud and seals are trash.
There is no fan clutch.
If you add up all the parts it's a wash.
The electric fans improve A/C at idle,
so he decided that route.
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Old May 21, 2020 | 08:42 AM
  #37  
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Originally Posted by jackson
tread lightly ... I KNOW someone who Just got dinged for same sort of mention.
Originally Posted by Big2Bird


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Old May 21, 2020 | 06:40 PM
  #38  
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CXB 75 LS 9. C20 to C3500. 165 hp. but could be 4 bolt, forged crank and pistons.

Last edited by derekderek; May 21, 2020 at 06:44 PM.
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Old May 21, 2020 | 06:52 PM
  #39  
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Originally Posted by derekderek
CXB 75 LS 9. C20 to C3500. 165 hp. but could be 4 bolt, forged crank and pistons.
Thank you very much. So, the story is correct. Just wrong year.
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Old May 23, 2020 | 02:27 PM
  #40  
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Out with the old, in with new Spectra unit. Both read 90 ohms. I used a dab of Gaskacinch to hold the oring in place.
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