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Rebuild c3 engine (1/16)
 7/13/21 12:18pm
flash1070
Former Member

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Spokane, WA - USA

Vette(s):
1976 red and black with brown interior


Joined: 9/3/2020
Posts: 6

I am planing to rebuild my 350 this winter.  I was wondering what would be the max hp possible with the automatic 3 speed transmission that came with the 1976 c3.

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Re: Rebuild c3 engine (2/16)
 7/13/21 3:31pm
F4Gary
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.


Joined: 8/26/2006
Posts: 1071

It's not the horsepower, it's more about how much torque it can handle.



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Re: Rebuild c3 engine (3/16)
 7/13/21 8:20pm
73shark
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Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.


Joined: 7/9/2003
Posts: 693

Since the Turbo-Hydramatic transmission withstood the torque of the big block Corvettes in the early '70s, I suspect it will take anything that your 350 will put out if it's naturally aspirated.  Of course this assumes that GM didn't do anything to weaken the transmission in the later 70s.



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1973 L-82 4 spd

Re: Rebuild c3 engine (4/16)
 7/14/21 9:10am
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2058

It is going to depend on your driving style. If you lean on Any drivetrain, eventually it will break. Misuse it, Lose it!  They were built to drive and enjoy. Common Sense and Good Judgement goes a long way. 

Re: Rebuild c3 engine (5/16)
 7/14/21 9:48pm
Adams' AppleLifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
Posts: 19857

The stock 400 trans, assuming it is in good condition to begin with, will handle pretty much anything you throw at it, short of nitrous or a blower...



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Re: Rebuild c3 engine (6/16)
 7/16/21 11:11am
flash1070
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Spokane, WA - USA

Vette(s):
1976 red and black with brown interior


Joined: 9/3/2020
Posts: 6

so after some thinking and listening to others, I will be buying a crate engine and new transmission to be put into the corvette.  I will also be keeping the engine that is being pulled out.  I believe it is the original engine.  I have only owned the corvette for one year.  So I do not know what has or has not been done to the engine.  This way I will know all about the engine and will be able to have a warranty with it.  Thank you all for your advice.

Re: Rebuild c3 engine (7/16)
 7/16/21 11:18am
73shark
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Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.


Joined: 7/9/2003
Posts: 693

Good plan.  👍



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1973 L-82 4 spd

Re: Rebuild c3 engine (8/16)
 7/16/21 11:50am
Rawhide
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Johnstown, OH - USA

Vette(s):
1979 Vette


Joined: 11/16/2020
Posts: 8

Good luck, I ordered a 355, 300 hp crate from Jegs back in April. Was told end of October. Hope you have better luck. AKT I believe do the crates for a lot of the sellers and they say they just don’t have any blocks and parts to build for awhile. 

Re: Rebuild c3 engine (9/16)
 7/16/21 2:44pm
73shark
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Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.


Joined: 7/9/2003
Posts: 693

You might try getting a crate engine from Chevrolet as they have several performance ratings and a 3-year warranty.



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1973 L-82 4 spd

Re: Rebuild c3 engine (10/16)
 7/16/21 2:57pm
F4Gary
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.


Joined: 8/26/2006
Posts: 1071

I've also heard good things about Blueprint Engines.



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Re: Rebuild c3 engine (11/16)
 7/16/21 4:15pm
flash1070
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Spokane, WA - USA

Vette(s):
1976 red and black with brown interior


Joined: 9/3/2020
Posts: 6

I talked to a place in my home town and they said they could build me one in 6 to 8 weeks.

Re: Rebuild c3 engine (12/16)
 7/16/21 4:16pm
flash1070
Former Member

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Spokane, WA - USA

Vette(s):
1976 red and black with brown interior


Joined: 9/3/2020
Posts: 6

they company I talked to has a 7 year 100000 mile warranty.

Re: Rebuild c3 engine (13/16)
 7/16/21 4:28pm
73shark
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Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.


Joined: 7/9/2003
Posts: 693

How does their cost compare with the Chevrolet crate engine?



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1973 L-82 4 spd

Re: Rebuild c3 engine (14/16)
 7/17/21 8:20pm
flash1070
Former Member

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Spokane, WA - USA

Vette(s):
1976 red and black with brown interior


Joined: 9/3/2020
Posts: 6

the engine will be 2462 dollars.  This is a 350 with 350 hp.

Re: Rebuild c3 engine (15/16)
 7/17/21 11:15pm
F4Gary
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.


Joined: 8/26/2006
Posts: 1071

What company?



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Re: Rebuild c3 engine (16/16)
 7/19/21 1:03pm
flash1070
Former Member

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Spokane, WA - USA

Vette(s):
1976 red and black with brown interior


Joined: 9/3/2020
Posts: 6

s&j engines in spokane wa.

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