
Thanks:
0

Likes:
0

Dislikes:
0
-
'75 stock crank pulley OD?....
A search didn't turn this up.
Can someone tell me what the crankshaft pulley flange OD is that the 1975 engine uses for it's ignition timing mark? I want to mark mine for more then TDC and need to figure out the circumferential distance in inches/mm for each degree and can't get a good measurement with the engine in my Manta.
TIA.
-Mark
-
-
Member

Originally Posted by
Aardvaark
A search didn't turn this up.
Can someone tell me what the crankshaft pulley flange OD is that the 1975 engine uses for it's ignition timing mark? I want to mark mine for more then TDC and need to figure out the circumferential distance in inches/mm for each degree and can't get a good measurement with the engine in my Manta.
TIA.
-Mark
measure across the pulley to get your diameter and times that by 3.1415 (Pi) and divide that by 360 to get the distance traveled for 1 degree.I don't know the diameter of your pulley but here's an example; 5" X 3.1415 =15.7075/360 = .04363" for every 1 degree traveled around the circumference so 5 degrees would be .21815 (7 /32").
-
Member
I have the pulley off of my 75 Manta to replace the front crank seal and water pump. I will look at it later today and give you a measurement. Gordy
-
-

Originally Posted by
booeman
measure across the pulley to get your diameter and times that by 3.1415 (Pi) and divide that by 360 to get the distance traveled for 1 degree.I don't know the diameter of your pulley but here's an example; 5" X 3.1415 =15.7075/360 = .04363" for every 1 degree traveled around the circumference so 5 degrees would be .21815 (7 /32").
Thanks, but I only need the actual diameter. I'm a retired mechanical engineering technician. 
Last edited by Aardvaark (R.I.P.); 09-17-2007 at 09:36 AM.
-

Originally Posted by
Gordy
I have the pulley off of my 75 Manta to replace the front crank seal and water pump. I will look at it later today and give you a measurement. Gordy
Thanks. I appreciate your effort.
-
Member
the crank pulley measures 5 1/8 inches outer lip to outer lip.
-

Originally Posted by
Gordy
the crank pulley measures 5 1/8 inches outer lip to outer lip.
Much thanks!
Similar Threads
-
By opelwasp in forum Racers Forum
Replies: 23
Last Post: 04-09-2008, 11:59 AM
-
By jordan in forum Opel Engine Performance Modifications
Replies: 15
Last Post: 02-26-2007, 09:29 AM
-
By GT Tim in forum Group 9 - Accessories - Radio, Heater, A/C, Sound Systems
Replies: 71
Last Post: 06-23-2006, 01:35 PM
-
By tekenaar in forum Opel Engine Performance Modifications
Replies: 14
Last Post: 03-25-2006, 07:48 PM
-
By mjewell in forum 6A - Engine Mechanical
Replies: 7
Last Post: 03-02-2004, 11:30 PM
Posting Permissions
- You may not post new threads
- You may not post replies
- You may not post attachments
- You may not edit your posts
-
Forum Rules
Bookmarks