Author	[Modern View]
showcrop 08-13-2012 04:17:29 75.67.231.80 Report to Moderator	My 960 with carb from 961 makes low vacuum on the vacuum gauge and much lower than my 961. Any ideas? [Reply]   [No Email]
David G 08-13-2012 16:21:05 205.215.206.18 Report to Moderator	Re: Low vacuum in reply to showcrop, 08-13-2012 04:17:29   A lot of factors can affect this, what is the vacuum reading on the 960, and does it run OK? [Reply]  [No Email]
showcrop 08-13-2012 19:08:46 75.67.231.80 Report to Moderator	Re: Low vacuum in reply to David G, 08-13-2012 16:21:05   Quoting Removed, click Modern View to see I'll have to go back to the gauge to check the actual reading, but it is out of the green zone on the face of the gauge. The tractor runs very well, and has since I got the engine "blue printed" nine years ago. The only problem is that it doesn't pull the transfer sled as far as I would like it to, LOL. [Reply]  [No Email]
awhtx 08-13-2012 15:47:59 74.84.89.147 Report to Moderator	Re: Low vacuum in reply to GT65, 08-13-2012 04:17:29   Quoting Removed, click Modern View to see [Reply]  [No Email]
MarkB_MI 08-13-2012 15:19:18 75.219.17.109 Report to Moderator	Re: Low vacuum in reply to showcrop, 08-13-2012 04:17:29   Let's back up: What inspired you to put a vacuum gauge on your tractors in the first place? Curiosity or an actual problem? If it was curiosity, and both tractors run fine, then why worry about it? If you were diagnosing a problem, then what is it? [Reply]  [No Email]
JMOR 08-13-2012 12:04:40 72.181.173.171 Report to Moderator	Re: Low vacuum in reply to Brian Allen, 08-13-2012 04:17:29   Exactly, John. I always like these two lines: Everything that is known to be true isn’t. or, A great many things that all know to be true, aren’t. :wink: [Reply]  [No Email]
John Smith8N 08-13-2012 11:43:00 76.253.185.2 Report to Moderator	Re: Low vacuum in reply to jaluhn, 08-13-2012 04:17:29   Quoting Removed, click Modern View to see You must not be old enough. From a cam manufacturer - In the early 1950's the most popular original camshaft designers were the legendary Ed Winfield, the father of hotrodding, and Cliff Collins of Harman-Collins. If you look a Huntington's 1951 book you will find the specs for their cams listed. There were lots of cam grinders that copied Winfield and Harman-Collins cams, but these two were the designers and innovators in the early days. It was popular to refer to cams as a 1/2 Race or Semi grind and a Full Race grind. Later, there was a call for an intermediate grind between these two. To fill this demand, Ed Winfield took the intake lobe from his full race cam and the exhaust lobe from his semi cam and called it a 3/4 Race cam. It was literally half way between a full race and 1/2 race cam. Since that time, 3/4 Race has become a generic term for a high performance street cam, i.e. something less than a race cam. From the current Crane Cams catalog - Crane Cams #271-100172 Energizer 3/4 Race Hydraulic Flat Tappet Camshaft & Lifter Kit Lift: .450''/.450'' Duration: 274°/274° RPM Range: 1800-5800 [Reply]  [No Email]
awhtx 08-13-2012 07:39:04 144.9.40.131 Report to Moderator	Re: Low vacuum in reply to showcrop, 08-13-2012 04:17:29   Does it have a 3/4 race cam? They don"t make much vacuum. [Reply]  [No Email]
old 08-13-2012 10:36:41 209.86.226.32 Report to Moderator	Re: Low vacuum in reply to awhtx, 08-13-2012 07:39:04   3/4 race cam that is a myth as for the term even being real. [Reply]  [No Email]
Ultradog MN 08-13-2012 05:03:31 70.56.167.233 Report to Moderator	Re: Low vacuum in reply to showcrop, 08-13-2012 04:17:29   The simplest ideas would be a leaking manifold gasket or carb to manifold gasket. I don't remember if the distributer on those is vacuum advance but possibly a bad diaphram? Next guess would be low compression. Spray some starting fluid around the intake manifold and see if it is leaking. The engine will rev significantly if it is. [Reply]  [No Email]
soundguy 08-13-2012 10:30:27 107.41.81.162 Report to Moderator	Re: Low vacuum in reply to Ultradog MN, 08-13-2012 05:03:31   mechanical advance. [Reply]  [No Email]