Timing at 2100Rpms?
Thread Starter
Melting Slicks
Joined: May 2007
Posts: 3,246
Likes: 4
From: Bay Area CA
Timing at 2100Rpms?
I'm setting a motor up after a rebuild, have to break in the cam. As you know, it has to got directly to 2100Rpms for 20 mins. what should i adjust the timing to when it's running at 2100Rpms?
I can also aprx the timing with the engine off, on dist install, by using degrees from TDC #1, eyeballing it on the dist. What should i set the dist to cold- engine off, before start up?
I can also aprx the timing with the engine off, on dist install, by using degrees from TDC #1, eyeballing it on the dist. What should i set the dist to cold- engine off, before start up?
Melting Slicks
Joined: Jan 2003
Posts: 2,877
Likes: 13
From: Doha
St. Jude Donor '08
When I broke-in my cam few months back, I brought the RPM to 2500 RPM right away and got the timing right at 30*, my engine seemed happy with that and carried on the 20 min. period with no problems at all, well, the only problem was I got a camera on a tripod to capture the whole process (its my 1st ever engine re-build!) and when I got everything setup nicely and switched the engine off, I figured that I forgot to push the REC button on the camera!!!
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
An engine should be set to 12-16 degrees static for initial start. This seems really agressive, but you want the engine to start on first crank. There's no need to adjust the timing; after cam break-in, shut-down, oil/filter change and re-torquing you can start it again and work out the initial timing.
Remember to pre-oil, and if you can fill the carb bowl with gas as well as it'll be dry and a full bowl will allow the engine to run long enough for the fuel pump to take over.
Remember to pre-oil, and if you can fill the carb bowl with gas as well as it'll be dry and a full bowl will allow the engine to run long enough for the fuel pump to take over.
