It is currently Thu Nov 15, 2018 1:21 pm

All times are UTC - 5 hours [ DST ]


Forum rules


Please click here to view the forum rules



Post new topic Reply to topic  [ 15 posts ] 
Author Message
PostPosted: Thu Jan 15, 2015 8:21 pm 
356 Fan
User avatar

Joined: Wed Apr 02, 2008 11:14 pm
Posts: 142
Location: Denver, CO
Looking for any info on this piston and cylinder set of 4. Obviously made by Mahle. ~74mm bore. I need to get a new battery for my caliper and just measured with a ruler this evening and will get a more accurate measurement in the morning.

The Mahle box is really knackered and is pretty unhelpful. It does say '1500' but... who knows. P&C's in Porsche bags. Wrist pins included.

Attachment:
IMG_4734.JPG
IMG_4734.JPG [ 150.06 KiB | Viewed 1752 times ]


Attachment:
IMG_4731.JPG
IMG_4731.JPG [ 141.34 KiB | Viewed 1752 times ]


Attachment:
IMG_4732.JPG
IMG_4732.JPG [ 100 KiB | Viewed 1752 times ]


Attachment:
IMG_4733.JPG
IMG_4733.JPG [ 93.64 KiB | Viewed 1752 times ]

_________________
Carl Bauer - 1979 RoW 911SC


Top
 Profile  
Reply with quote  
PostPosted: Thu Jan 15, 2015 8:31 pm 
356 Fan
User avatar

Joined: Wed Mar 26, 2008 11:45 am
Posts: 6036
Location: San Francisco
The spec book says the '50 -'53 1500 engines were 74mm bore X 80mm stroke; I'm no authority on those vintages, but I'd bet that's a 2-piece case.

_________________
Ron LaDow
www.precisionmatters.biz


Top
 Profile  
Reply with quote  
PostPosted: Thu Jan 15, 2015 9:07 pm 
356 Fan

Joined: Wed Mar 26, 2008 12:06 pm
Posts: 998
Location: Orinda, CA
No, the 1500 2-pc case motors were 74mm stroke by 80mm bore. The late 1300 motors were 74mm stroke by 74.5 mm bore, that is probably what these p&c's are. Would need to see more photos of the cylinders to tell if they are for a 2-pc case or a 3-pc case. First guess would be 1300 normals for a 3-pc case motor.

Alan


Top
 Profile  
Reply with quote  
PostPosted: Thu Jan 15, 2015 9:57 pm 
356 Fan
User avatar

Joined: Wed Apr 02, 2008 11:14 pm
Posts: 142
Location: Denver, CO
Thanks guys. Alan, I will get a few more pics of the cylinders up tomorrow.

Alan Hall wrote:
No, the 1500 2-pc case motors were 74mm stroke by 80mm bore. The late 1300 motors were 74mm stroke by 74.5 mm bore, that is probably what these p&c's are. Would need to see more photos of the cylinders to tell if they are for a 2-pc case or a 3-pc case. First guess would be 1300 normals for a 3-pc case motor.

Alan

_________________
Carl Bauer - 1979 RoW 911SC


Top
 Profile  
Reply with quote  
PostPosted: Thu Jan 15, 2015 10:23 pm 
356 Fan
User avatar

Joined: Wed Mar 26, 2008 11:45 am
Posts: 6036
Location: San Francisco
Alan Hall wrote:
No, the 1500 2-pc case motors were 74mm stroke by 80mm bore. Alan
My mistake. The top of the column is labeled "Stroke/Bore" rather than the other way 'round. Thanks, Alan.

_________________
Ron LaDow
www.precisionmatters.biz


Top
 Profile  
Reply with quote  
PostPosted: Fri Jan 16, 2015 12:48 am 
356 Fan

Joined: Thu Oct 15, 2009 11:06 pm
Posts: 1339
Location: Vista, CA
Alan Hall wrote:
Would need to see more photos of the cylinders to tell if they are for a 2-pc case or a 3-pc case.

You can tell by measuring the head stud hole spacings.
Center to center, 2-pc case head stud spacings are roughly 67mm by 76mm, 3-pc case head stud spacings roughly 73mm by 82mm.
The 1600 3-pc cases I have here have 90mm cylinder spigots, the 2-pc cases 86mm cylinder spigots.

_________________
Jon Bunin


Top
 Profile  
Reply with quote  
PostPosted: Fri Jan 16, 2015 10:19 am 
356Talk Moderator
User avatar

Joined: Thu Aug 15, 2013 9:15 am
Posts: 2118
Location: Baltimore, MD
Yes, these look like 1300 normal P&Cs for the 3-piece case given the relief in the piston top and the thickness of the cylinder wall. Didn't the 1300 pistons for the 2-piece case have an odd, asymmetric "nosed" shape?


Top
 Profile  
Reply with quote  
PostPosted: Fri Jan 16, 2015 10:41 am 
356 Registry Member
User avatar

Joined: Tue Oct 27, 2009 5:02 pm
Posts: 6547
Location: SE Michigan
Thickness of the cylinder wall definitely says they are for a 3-piece case engine, using the 3-piece engine cylindeer heads.

_________________


Top
 Profile  
Reply with quote  
PostPosted: Fri Jan 16, 2015 10:59 am 
356Talk Moderator
User avatar

Joined: Thu Aug 15, 2013 9:15 am
Posts: 2118
Location: Baltimore, MD
In fact, compare these to a set of 1300 Super (3-piece case) P&Cs in the classifieds.

https://porsche356registry.org/classifieds/1169

They look the same except for the higher-compression pistons of the Super.


Top
 Profile  
Reply with quote  
PostPosted: Fri Jan 16, 2015 7:13 pm 
356 Fan
User avatar

Joined: Wed Apr 02, 2008 11:14 pm
Posts: 142
Location: Denver, CO
Thanks for all your help guys! Here are a few more pics of one of the 74.5mm cylinders. Looks like the Porsche part Nr. for the P&C set is 616.03.221

Attachment:
IMG_4738.JPG
IMG_4738.JPG [ 114.73 KiB | Viewed 1594 times ]


Attachment:
IMG_4737.JPG
IMG_4737.JPG [ 115.12 KiB | Viewed 1594 times ]


Attachment:
IMG_4736.JPG
IMG_4736.JPG [ 116.18 KiB | Viewed 1594 times ]


Attachment:
IMG_4735.JPG
IMG_4735.JPG [ 91.57 KiB | Viewed 1594 times ]

_________________
Carl Bauer - 1979 RoW 911SC


Top
 Profile  
Reply with quote  
PostPosted: Sat Jan 17, 2015 2:25 pm 
356Talk Moderator
User avatar

Joined: Thu Aug 15, 2013 9:15 am
Posts: 2118
Location: Baltimore, MD
Carl, are these cylinders chrome-lined or nicasil-lined? Chrome lined (with the bumps) would mean they were from the mid-50s. Nicasil lined would mean they were made later, perhaps in the 60s, as replacement items for 506/2 engines.

And I should correct myself above. I mentioned the "nosed" pistons were used on the 2-piece cases. This is only partially true. There were two 1300 2-piece case engines with different bore and stroke.

Type 506, 80mm bore, 64mm stroke
Type 506/1, 74.5mm bore, 74mm stroke (also called the 1300A)
Type 589, 74.5mm bore, 74mm stroke, (also called 1500 Super)

Only the late 506 engines from ~1953 used the nosed pistons.


Top
 Profile  
Reply with quote  
PostPosted: Sat Jan 17, 2015 7:37 pm 
356 Fan
User avatar

Joined: Wed Apr 02, 2008 11:14 pm
Posts: 142
Location: Denver, CO
James Davies wrote:
Carl, are these cylinders chrome-lined or nicasil-lined? Chrome lined (with the bumps) would mean they were from the mid-50s. Nicasil lined would mean they were made later, perhaps in the 60s, as replacement items for 506/2 engines.


James,

Per your description they're chrome lined. The liners have the little 'bumps'.

_________________
Carl Bauer - 1979 RoW 911SC


Top
 Profile  
Reply with quote  
PostPosted: Sat Jan 17, 2015 9:27 pm 
356Talk Moderator
User avatar

Joined: Thu Aug 15, 2013 9:15 am
Posts: 2118
Location: Baltimore, MD
Cool Carl! Those are period originals then. Very nice.


Top
 Profile  
Reply with quote  
PostPosted: Sun Jan 18, 2015 11:34 am 
356 Fan

Joined: Sun Apr 20, 2008 12:54 am
Posts: 2892
A clarification,

The chrome liners wouldn't have 'bumps' in their bores; they're dimples to retain lubricant for the pistons/rings.
The Nicasil coating was/is a replacement for the previous metal-sprayed S90/early SC aluminum cyls. which has
enough oil retainment like cast iron cyls.

Dick


Top
 Profile  
Reply with quote  
PostPosted: Mon Nov 05, 2018 5:32 am 
356 Fan

Joined: Sun Dec 26, 2010 10:32 am
Posts: 9
Carl,

do you still offer toolkit repros like Prudenz, Messco

pls contact me

_________________


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 15 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: Dick Weiss, Google [Bot], MarioManzo, Spencer Harris


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group