Period Correct vs. numbers matching

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Mark Roth
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Re: Period Correct vs. numbers matching

#16 Post by Mark Roth » Sat Dec 24, 2016 11:50 pm

I don't know why I got off on an S90 tangent. If the car was originally an SC, then the 912 engine is close enough. A S90 without an S90 engine is not an S90.
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Re: Period Correct vs. numbers matching

#17 Post by Dick Weiss » Sun Dec 25, 2016 10:25 pm

Going further,

There's a difference in the face of the 912 casting vs the S90's--the 2-on each upper corner stud bosses are taller for the 912's
crossbar mounts (w/longer studs) and just the upper left boss stays intact and the other 3-should be cut down (I've done several) and change to the shorter studs.
Of coarse, there will be the 2-face ribs remaining between the upper left-over bosses to the pulley's seal-nose and can be seen above the sheet metal; Otherwise, exchange the 3rd piece having an S90 #. Then there's the case #s on the 2nd upper bolt boss @ the split line--easy to change.

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Martin Benade
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Re: Period Correct vs. numbers matching

#18 Post by Martin Benade » Mon Dec 26, 2016 12:42 am

His car is really an SC, so no S90 parts around. Are you suggesting he grind off the case numbers? As per recent discussions here, it seems like there is no respectable reason to do that.
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Re: Period Correct vs. numbers matching

#19 Post by Greg Bryan » Mon Dec 26, 2016 1:42 am

I think Dick was referring to machining down the four bosses on the 912 case third piece to approximate more closely the 356 third piece dimensions. The 912 had the bosses extended to accommodate the rear engine mount, as you probably already know. I posted some pictures within the last couple of years of a 912 engine 3rd piece machined similar to a 356 cover.
However, with the rising price of 912s, I wouldn't be so quick to machine a 912 motor so it makes it difficult to put it in a 912 again. The stock set-up for the 912 will work with the 356, there is some interference with the top corner nuts and the tin that goes behind the pulley, but nothing that can't be overcome.
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Re: Period Correct vs. numbers matching

#20 Post by Vic Skirmants » Mon Dec 26, 2016 8:33 am

Greg Bryan wrote:I think Dick was referring to machining down the four bosses on the 912 case third piece to approximate more closely the 356 third piece dimensions. The 912 had the bosses extended to accommodate the rear engine mount, as you probably already know. I posted some pictures within the last couple of years of a 912 engine 3rd piece machined similar to a 356 cover.
However, with the rising price of 912s, I wouldn't be so quick to machine a 912 motor so it makes it difficult to put it in a 912 again. The stock set-up for the 912 will work with the 356, there is some interference with the top corner nuts and the tin that goes behind the pulley, but nothing that can't be overcome.

"Then there's the case #s on the 2nd upper bolt boss @ the split line--easy to change."

No, Greg; he did say to change numbers. Not acceptable.

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Period correct engine

#21 Post by Gary Thies » Sat Jan 29, 2022 12:29 am

A question for the group;

Yes or no; lacking the original engine, does having a "period correct" engine add to a cars value or desirability?


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Re: Period correct engine

#22 Post by Greg Haskin » Sat Jan 29, 2022 1:25 am

Gary, seems like there would need to be a few more parameters to be able to answer your question. If the car was otherwise very original, a period correct engine would probably be more desirable than not. This would be especially true for very early cars. In many cases, particularly with B's and C's, if it not the original, some folks prefer a 912 engine. Others might be more concerned about the build and condition of the engine, rather than the year. Generally, period correct is a pretty good bet if the original in gone, but the value aspect would be quite subjective.
 

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Re: Period correct engine

#23 Post by Doug McDonnell » Sat Jan 29, 2022 2:27 am

Gary There was a time when "period correct" was touted as 2nd best to numbers matching. I have never undestood the rational. I prefer 912 C/SC for later case improvements, 12 bolt ring and pinion and large oil pump. Next for me would be a large oil pump engine with the late B engines with the extra 0 in front of the engine number, then the other large oil pump engines. And bottom of my list would be a small oil pump engine. This assumes similar build quality of the engine of each type.
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Re: Period correct engine

#24 Post by Adam Wright » Sat Jan 29, 2022 2:41 am

In my experience a period correct motor on a well done car carries more weight than a later motor. A lot of the guys who are buying these cars now don't know small oil pump vs large oil pump, or any of the other later improvements. And the way most people drive these cars now it doesn't really matter. Most 356's are now at best weekend touring cars and at worst rolled off of trailer onto a nice lawn. Oil pumps doesn't affect either scenario.
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Re: Period correct engine

#25 Post by Harlan Halsey » Sat Jan 29, 2022 5:37 am

Gary,
The answer is probably but that answer is also useless unless you are offered a choice of engine and probably not then. When buying a used car the buyers estimate of condition trumps everything else. Furthermore, buyers are different. Some are mechanically skilled and so may value body and interior condition more highly. Others may not fear paint or body work but know little of engine or transmission work. Some may want period correctness while others may want a hot rod.
Each sale is unique deal guided only by very general guidelines.

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Re: Period Correct vs. numbers matching

#26 Post by Bill Lawless » Sat Jan 29, 2022 9:40 am

If you were getting a performance benefit to make it a better driver, I would go for it. But you are not, leave it and enjoy!!!
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Re: Period correct engine

#27 Post by Jeffrey Leeds » Sat Jan 29, 2022 10:29 am

Adam Wright wrote:
Sat Jan 29, 2022 2:41 am
In my experience a period correct motor on a well done car carries more weight than a later motor. A lot of the guys who are buying these cars now don't know small oil pump vs large oil pump, or any of the other later improvements. And the way most people drive these cars now it doesn't really matter. Most 356's are now at best weekend touring cars and at worst rolled off of trailer onto a nice lawn. Oil pumps doesn't affect either scenario.
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Re: Period Correct vs. numbers matching

#28 Post by Martin Benade » Sat Jan 29, 2022 10:37 am

In other words it depends on who is buying and what they care about.
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Re: Period Correct vs. numbers matching

#29 Post by Dick Roth » Sat Jan 29, 2022 11:35 am

Reviewing the posts, including one I did in 2016, and the very extensive and diverse comments, i have only one thing further to say; More beer!
The discussion reminds me of the parable of 4 men touching an elephant in a dark room and each being asked to describe what the elephant is like...
Someone did say very early on the essence of this discussion: What is your objective??

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Re: Period Correct vs. numbers matching

#30 Post by Dick Roth » Sat Jan 29, 2022 11:43 am

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Sold this '58 after 44 years of ownership with decades-old engine swap from my upgraded '64 SC. It cost me...
33K original miles, 2nd owner.

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