C3 Vette Registry - The Best Resource on the Net for C3 Vettes! C3 Vette
Forums -> C3 Engines
Not Logged In! Login or Register!  Users Online: 16 / Help 
Features  Find C3 Parts on ebay in only 2 or 3 clicks!  | Add YOUR C3 to the Registry

Supporting Vendors
VetteBookStore.com
Bair's Corvettes
Volunteer Vette Products
Mid America Motorworks
CorvetteClothing.com

C3 of the Month
None Current
Enter Yours Today!
Online C3 Show
13
C3s are Registered

Vanity Plates
75STNGRY
kaz1961
Featured Links

Buy Now
Corvette: America's Sports Car Yesterday, Today, Tomorrow (Hardcover)
Corvette: America's Sports Car Yesterday, Today, Tomorrow (Hardcover)


Corvette Magazine - $19.99 for 8 issues
Corvette Magazine
Only $19.99 for 8 issues


Motor Trend - $5 for 12 issues.
Motor Trend
Only $5 for 12 issues.


Chevrolet Corvette Restoration Guide
Chevrolet Corvette Restoration Guide



| Hide Signatures and Profile Pics

 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
11/9/16 12:37pm - Original Message: 'age old question - rebuild or crate engine'
vince vette
Limited Member
- Send Private Message



Vette(s):
1980 L82 White with doeskin interior

Joined: 1/5/2016
Posts: 68
What would be the cost of a good rebuild on an L82 engine - I have the engine. Not looking to create a road warrior, just want to let breath wild and free and maybe bump up the compression a little. 

I considered a crate engine. But while I can match the hp for about $3k it seems I'm up to about $5k to get all the niceties in an L82 (forged steel crank, forged pistons, etc.).

 


____________________________________
As it once looked and hopefully will again
 Reply Reply  Quote Reply w/Quote
 
Support C3VR!
Suport our advertisers
11/9/16 1:18pm - Reply: 'Re: age old question - rebuild or crate engine'
Vman73
Standard Member
- Send Private Message


Gig Harbor, WA - USA

Vette(s):
1973 L82 4 Speed Coupe - Very original, well documented driver/survivor. 2016 Bend Regional NCRS Top Flight.

Joined: 10/2/2014
Posts: 362
Vince, the recent rebuild of the original L82 in my '73 ran just under $3k. Bored .030" over, slight grind to existing forged crank, new forged pistons and cam. The toughest part was finding an L82 cam supplier that my builder would work with. We finally ended up having one ground by Crower to the original specs. Dyno'd two weeks ago, 310hp/360tq (at the crank). Back in the car and well worth the $$ to keep it as original as possible without going crazy to look for NOS GM internals. Good luck with whatever you choose. If you do go crate motor, make sure you hold on to your original.

____________________________________
John Sigmund
valkman57@sbcglobal.net
NCRS Member 61302
NW NCRS Chapter Member



Duct tape is the new Black !!
 Reply Reply  Quote Reply w/Quote
11/9/16 1:30pm - Reply: 'Re: age old question - rebuild or crate engine'
vince vette
Limited Member
- Send Private Message



Vette(s):
1980 L82 White with doeskin interior

Joined: 1/5/2016
Posts: 68
Vman, thanks for the reply. That's exactly the kind of info I was looking for. I'll add in that if I avoid the crate engine route I won't have to store the original engine in the basement which will help maintain the relations with the other owner of the house. It's just a matter of time before she finds my collection of original parts like the push rods and rocker arms from when I put in roller tip rockers, the original radio/cassette deck (hey, at least it wasn't 8 track), the 8 track holder insert from the glove compartment (what were they thinking), etc. etc.  LOL 

____________________________________
As it once looked and hopefully will again
 Reply Reply  Quote Reply w/Quote
11/9/16 1:31pm - Reply: 'Re: age old question - rebuild or crate engine'
vince vette
Limited Member
- Send Private Message



Vette(s):
1980 L82 White with doeskin interior

Joined: 1/5/2016
Posts: 68
Vman, PS, were those hp and torque numbers at the rear wheels?

____________________________________
As it once looked and hopefully will again
 Reply Reply  Quote Reply w/Quote
11/9/16 2:47pm - Reply: 'Re: age old question - rebuild or crate engine'
Vman73
Standard Member
- Send Private Message


Gig Harbor, WA - USA

Vette(s):
1973 L82 4 Speed Coupe - Very original, well documented driver/survivor. 2016 Bend Regional NCRS Top Flight.

Joined: 10/2/2014
Posts: 362
Vince, those numbers were at the crank at 5200 RPM. I believe the original '73 L82 factory specs were 250HP/350TQ at the rear wheels. I was expecting the HP jump based on the crank numbers, didn't know exactly what to expect on the TQ numbers. My builder was impressed by the numbers and he stated that the new forged pistons were much lighter than the originals so he expected the motor to run much better at higher RPM's. One last note is that we re-used the original forged L82 connecting rods. Good luck if you rebuild, make sure you find someone that will stay away from decking the block and preserve your original engine pad !!

____________________________________
John Sigmund
valkman57@sbcglobal.net
NCRS Member 61302
NW NCRS Chapter Member



Duct tape is the new Black !!
 Reply Reply  Quote Reply w/Quote
11/9/16 4:10pm - Reply: 'Re: age old question - rebuild or crate engine'
vince vette
Limited Member
- Send Private Message



Vette(s):
1980 L82 White with doeskin interior

Joined: 1/5/2016
Posts: 68
Vman, thanks again. That gives me a good idea of what to compare things to then when assessing against the crate engines. 

____________________________________
As it once looked and hopefully will again
 Reply Reply  Quote Reply w/Quote
11/9/16 5:50pm - Reply: 'Re: age old question - rebuild or crate engine'
Vman73
Standard Member
- Send Private Message


Gig Harbor, WA - USA

Vette(s):
1973 L82 4 Speed Coupe - Very original, well documented driver/survivor. 2016 Bend Regional NCRS Top Flight.

Joined: 10/2/2014
Posts: 362
Vince, good luck which ever way you decide to go. A bit of full disclosure on my dyno run, numbers were made with my original Rochester Qjet, original cast iron intake and original distributor. The only non stock items during the dyno were their long tube headers. Their dyno unit was not set up for my stock exhaust manifolds.

|UPDATED|11/9/2016 3:50:44 PM (AZT)|/UPDATED|


____________________________________
John Sigmund
valkman57@sbcglobal.net
NCRS Member 61302
NW NCRS Chapter Member



Duct tape is the new Black !!
 Reply Reply  Quote Reply w/Quote
11/9/16 5:56pm - Reply: 'Re: age old question - rebuild or crate engine'
73shark
Standard Member
- Send Private Message


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: 396
I spent about $2,500 on my L82 rebuild.  Bored .030" over, aligned bored, decked the block just enuf to true it up and maintain the VIN stamping, new TRW 11:1 pistons (gives 10:1 compression with the L82 heads) , and a mild roller cam.  I did the disassembly and assembly. Still need to measure for the new pushrods and get them.  Had the valve covers polished.

One advantage to a crate motor is it comes with a three year warranty.

____________________________________

1973 L-82 4 spd

 Reply Reply  Quote Reply w/Quote
11/10/16 7:52am - Reply: 'Re: age old question - rebuild or crate engine'
vince vette
Limited Member
- Send Private Message



Vette(s):
1980 L82 White with doeskin interior

Joined: 1/5/2016
Posts: 68
Thanks for the additional input. My thought is to use tri-y's ultimately as from my reading they are likely the best option for a relatively stock L82 which hits max hp around 5200 RPM. 

____________________________________
As it once looked and hopefully will again
 Reply Reply  Quote Reply w/Quote
11/10/16 7:54am - Reply: 'Re: age old question - rebuild or crate engine'
vince vette
Limited Member
- Send Private Message



Vette(s):
1980 L82 White with doeskin interior

Joined: 1/5/2016
Posts: 68
That sounds pretty reasonable overall and I do like the idea of a roller cam. Of course, I'd have to add labor as I don't plan on doing it myself - just don't want to wait the time I know it would take me to do it. 

____________________________________
As it once looked and hopefully will again
 Reply Reply  Quote Reply w/Quote
 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
 Forums -> C3 Engines
(Moderator: Adam Wartell, Norsky, Adams' Apple)
 

 
Official C3 Vette Registry Community:
Home | Forums | Email | Who's Online | Clubs | Events | Member Stats

Other Official C3 Vette Registry Areas:
Members | Research | Shop | My Account | About C3VR
 

Corvette is a registered trademark of the General Motors Corporation(GM) & Chevrolet Motor Division. Vette Registries, LLC is responsible for all site content (except for member submitted content or where otherwise noted) and does not claim or imply that Chevrolet or GM is responsible for Official C3 Vette Registry content. Vette Registries, LLC is independent from GM and is not affiliated with, sponsored or supported by GM.  Copyright/trademark/sales mark infringements are not intended, or implied and are in fact used to support GM, Chevrolet and Corvette

Official C3 Vette Registry content is Copyright 2001-2017, Vette Registries, LLC. Content may not be reused without written consent. All Rights Reserved. NS

Corvette (Vette) Model Years on this site: 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 30