Is it true that large journal cranks are more prone to brake if they receive a thrashing (compared to small journals) due to the extra weight they have to throw around
Then is the Lrg J crank stronger in std form or stroked
| ausmini https://www.ausmini.com/forums/ |
|
| 1100S parts ID help https://www.ausmini.com/forums/viewtopic.php?f=2&t=80390 |
Page 1 of 1 |
| Author: | Kennomini [ Sun Feb 17, 2013 12:48 pm ] |
| Post subject: | 1100S parts ID help |
Ok I've striped down a 1100S engine and want to check what main parts I have. Gear box: 22G1832 (As far as I know it has a 3.444:1 diff, rod change, pot joints and I'm pretty sure it's 4 syncro). Block: 12YD/Ta/H#### (Rough year and any other interesting info please) Crank: 12G1505A (Large, small journal?) Head: 12G940 Is it a good head to start with? |
|
| Author: | Lillee [ Sun Feb 17, 2013 1:21 pm ] |
| Post subject: | |
12G1505 is a large journal crank, so large journal rods too. Depends on what you want to do |
|
| Author: | Lillee [ Sun Feb 17, 2013 1:21 pm ] |
| Post subject: | |
Double post |
|
| Author: | MiniBill [ Sun Feb 17, 2013 1:22 pm ] |
| Post subject: | |
After googling a bit the block #12YD/Ta/H says its a 12YD/Ta/H 1275 Leyland 1275LS (12" Wheels). Is that the sort of info your after ? Info was from here http://www.miniownersclub.com.au/index. ... 6&Itemid=2 |
|
| Author: | Morris 1100 [ Sun Feb 17, 2013 1:43 pm ] |
| Post subject: | |
12YD/Ta/H was only used in the Morris 1100S. It was not used in the 1275LS. They changed from the small journal to large journal crank at engine 12YD/Ta/H10488. |
|
| Author: | Rob1970 [ Sun Feb 17, 2013 1:44 pm ] |
| Post subject: | |
Engine is an 1100s manual Crank is the std large journal one. Worth checking rods to see if it has been modified/stroked. Cooper Rods AEG521 1 5/8" journal (used to stroke) Standard Rod 1 3/4" Journal Nine headbolt 12G940 head is same casting as Mk2 Cooper S but different valves. A good engine to build up. Cheers Rob. |
|
| Author: | Kennomini [ Sun Feb 17, 2013 3:19 pm ] |
| Post subject: | |
Is it true that large journal cranks are more prone to brake if they receive a thrashing (compared to small journals) due to the extra weight they have to throw around
Then is the Lrg J crank stronger in std form or stroked
|
|
| Author: | drmini in aust [ Sun Feb 17, 2013 3:41 pm ] |
| Post subject: | |
Kennomini wrote: Is it true that large journal cranks are more prone to brake if they receive a thrashing (compared to small journals) due to the extra weight they have to throw around
Then is the Lrg J crank stronger in std form or stroked Big journal crank is heavy, and has very poor counterweighting, worse than the small journal ones. This can be improved by wedging it but it costs $$$. This may not prevent cracking but it does reduce radial load and uneven wear on the main journals. There is some evidence here in Oz to suggest that yes, they are more crack prone than small journal ones, but that this can be improved if you grind the journals down to 1.625" (whether you stroke, destroke, or keep stock stroke..) The weight of the damned heavy lumpy cap rods the 12G1505 cranks come with doesn't help. |
|
| Page 1 of 1 | All times are UTC + 10 hours |
| Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/ |
|