Engine conversion to GM for 1978 corniche - Rolls-Royce and Bentley Forums
 
LinkBack Thread Tools Display Modes
post #1 of 10 (permalink) Old 01-08-2020, 04:17 PM Thread Starter
New Member
 
Join Date: Jan 2019
Posts: 17
Engine conversion to GM for 1978 corniche

Please advise on the experience of Rolls Royce owners of the pros and cons of converting the engine to a new general motors engine.

Thanks

Rollsroyceroamer
rollsroyceroamer is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old 01-08-2020, 05:13 PM
Member
 
Nordmende's Avatar
 
Join Date: Nov 2019
Location: Deutschland
Posts: 25
Its stupid. Period!

If you cannot run or rebuild the engine of your 78 Corniche, sell it and dont rape the car.

PCX 46761 (93 Turbo R)
Nordmende is offline  
post #3 of 10 (permalink) Old 01-08-2020, 05:46 PM
Senior Member
 
Join Date: Mar 2012
Location: Tulsa
Posts: 620
Agreed and you will seriously drop the value of the car, especially a Corniche.

1974 Silver Shadow
Dounraey is offline  
 
post #4 of 10 (permalink) Old 01-08-2020, 06:25 PM
Senior Member
 
Wraithman's Avatar
 
Join Date: Jan 2017
Location: New York
Posts: 1,893
Forget it. The RR engine is superb. There would be a secondary issue with powering up the hydraulics. Sell it to someone who will fix it.

1980 SWII LRL-41587C FInj
1976 SS LWB LRE-23114 Harkness RR
Wraithman is offline  
post #5 of 10 (permalink) Old 01-08-2020, 07:39 PM
Senior Member
 
Join Date: Apr 2012
Location: Wexford, Ireland
Posts: 1,717
There are no pros and only cons. You will seriously devalue your Corniche.
shadow 11 is offline  
post #6 of 10 (permalink) Old 01-08-2020, 07:59 PM
Senior Member
 
Join Date: Sep 2015
Posts: 337
By the time you go to all that work of fitting an engine that doesn't belong, it will be less expensive to deal with the RR engine.
Jeff R 1 is offline  
post #7 of 10 (permalink) Old 01-09-2020, 07:06 AM
Senior Member
 
Join Date: Mar 2018
Location: Sunny south France + sunny south Spain
Posts: 75
Garage
Look at this invoice :

https://www.rollsroyceforums.com/for...1&d=1578567640

113 k$ to install a brand new Chevy engine + transmission in a '67 Corniche !
A fellow member of the french forum just bought this car for.... 15 k€ ($ 16.700).
Fixing the RR engine would have been cheaper.
Market value of the car would have been higher.
Attached Images
File Type: jpg 3q0j.jpg (197.3 KB, 34 views)
FLYER34 is offline  
post #8 of 10 (permalink) Old 01-09-2020, 07:22 AM
Senior Member
 
Join Date: Oct 2017
Location: Dallas, TX
Posts: 564
Apparently, you can LS swap anything. You'll probably need to carry over the hydroboost system from a truck for the brakes.

How about a powerstroke 7.3 diesel engine?
alabbasi is offline  
post #9 of 10 (permalink) Old 01-09-2020, 01:41 PM
Senior Member
 
jonnyc's Avatar
 
Join Date: Aug 2016
Location: Braintree, MA
Posts: 302
Garage
Well my two cents...anyone who spends 113k on a Chevy engine conversion should be sent to an insane asylum.
Secondly, I would leave a corniche alone and rebuild the RR engine, properly maintained its bullet proof. If it were a silver spirit I'd say make it in to a hot rod, not a corniche, too valuable and too much future value potential.

Cheers!!!

"Gracie"
1979 SSII
jonnyc is offline  
post #10 of 10 (permalink) Old 01-17-2020, 02:22 AM Thread Starter
New Member
 
Join Date: Jan 2019
Posts: 17
Thanks for all the valuable advice.

I have spent $ 25,000 so far on essentially overhauling the car with new and rebuilt parts (found a very meticulous mechanic in Ashland, Oregon) I am hoping that I made the right decision since the resale value of this car is a maximum of $ 45,000

The following company could have replaced the Rolls engine with GM for $ 20,000:

https://hotrodparts.com/rollsbentley...conversion.htm
rollsroyceroamer is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Rolls-Royce and Bentley Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome
 

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.

SEO by vBSEO 3.6.1