Please note that the PICTURE UPLOAD function is not working. The iBoats Forum Moderators are working with the system administration folks at the parent company to get the issue resolved. This happened about a year ago and here we are again. In the meantime you can post photos as links to a picture hosting site of your choice. We are sorry about the inconvenience and will advise when the issue is resolved. Thank you for your patience.
SBC ,2 degrees for each mark. A stock type motor from mid 70's on with a vac canister.. Disconnect vac hose, and in most cases look for total advance of around 32 degrees at 2500- 3000 rpm. Thats just a general guide line , don't know what type of sbc you have......cheers