| ausmini https://www.ausmini.com/forums/ |
|
| carb id https://www.ausmini.com/forums/viewtopic.php?f=2&t=16897 |
Page 1 of 2 |
| Author: | sean [ Mon Mar 06, 2006 3:08 pm ] |
| Post subject: | carb id |
picture coming Could anyone identify model of my su carb Thanks |
|
| Author: | sean [ Mon Mar 06, 2006 3:10 pm ] |
| Post subject: | |
|
|
|
| Author: | sean [ Mon Mar 06, 2006 3:12 pm ] |
| Post subject: | |
While i'm here what about cylinder head - can it be identified from this pic Thanks |
|
| Author: | sports850 [ Mon Mar 06, 2006 4:16 pm ] |
| Post subject: | |
Carb I think is the basic , late 70's 1 1/2 (h number I don't know off hand) and the head is 78ish pollution head with the threaded holes for the pollution control airpump . No idea on valve sizes or which head exactly , if you take the rocker cover off somewhere on the casting there will be a 12G number and we can tell more from that . |
|
| Author: | drmini in aust [ Mon Mar 06, 2006 4:26 pm ] |
| Post subject: | |
Pollution (aka `smog') heads- smallbores all had 1.090" inlets and 1.000" exhausts, 1275s all had 1.313" inlets and 1.156" exhausts (head casting # 12G1316). |
|
| Author: | JAM_IT [ Mon Mar 06, 2006 4:30 pm ] |
| Post subject: | |
yep....what he said. Standard HS4 carb (1 1/2") and standard 998 'SMOG' head. BTW......aren't there any grub screws in those holes? If not, how does it run without them? 
|
|
| Author: | sean [ Mon Mar 06, 2006 4:30 pm ] |
| Post subject: | |
Thanks |
|
| Author: | sean [ Mon Mar 06, 2006 4:31 pm ] |
| Post subject: | |
What holes ? |
|
| Author: | sports850 [ Mon Mar 06, 2006 4:36 pm ] |
| Post subject: | |
The 4 holes in the front of the head below the spark plugs , these were used to allow air into the exhaust ports and therefore dilute the exhaust so there was lass percentage of pollution being produced (Yeah , they were clutching at straws ...) . These should be blocked , normally they have grub screws in them , otherwise it'll blow exhaust gas out the front and make a lot more noise . Are there any grub screws in them , can't see clear enough from the pics ? |
|
| Author: | sean [ Mon Mar 06, 2006 4:42 pm ] |
| Post subject: | |
No - no grub screws, look like rubber inserts in each hole, a couple have holes in the rubber inserts - is this bad should i put screws in to block the holes ? |
|
| Author: | sports850 [ Mon Mar 06, 2006 4:44 pm ] |
| Post subject: | |
Yeah , put screws or very short bolts into them otherwise you'll be getting a lot of fumes in the engine bay coming back into the cabin . |
|
| Author: | sean [ Mon Mar 06, 2006 4:46 pm ] |
| Post subject: | |
ok thanks - will this make any difference to the performance ? |
|
| Author: | sports850 [ Mon Mar 06, 2006 4:49 pm ] |
| Post subject: | |
most likely not , after all , all you'll be doing is blocking some potentially leaking exhaust gases . |
|
| Author: | JAM_IT [ Mon Mar 06, 2006 4:51 pm ] |
| Post subject: | |
7/16 UNF x 3/8" 4 off Approx $4 each 
|
|
| Author: | sean [ Mon Mar 06, 2006 4:54 pm ] |
| Post subject: | |
Thanks guys You learn something evry day 
|
|
| Page 1 of 2 | All times are UTC + 10 hours |
| Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/ |
|