<VV> Spyder Tach and Crane Cams XR-700 Electronic Ignition

[N2VZD TIM]

NOT sure if it is ignition unit , I have installed both on several motors without problems. Almost all of my project  vehicles have  ended up with a Spyder dash.

Sent from AOL DesktopIn a message dated 5/31/2022 3:23:54 PM Eastern Standard Time, virtualvairs at corvair.org writes: 
Recently, I replaced the engine in my '64 Spyder with newly rebuilt one [Hi,Tim!].  It came with a Crane Cams XR-700 ignition.  As it happens, my oldengine had an Allison XR-700 ignition, which I think is the predecessor tothe Crane model.  The pick up and wiring are the same.  Here's my problem:The tach reads about 250 RPM low at idle and about 1000 RPM or more low athighway speeds with the Crane.  It worked normally with the Allison. Any thoughts about why this is happening? Jim Bartasevich'61 Lakewood, 140/4'64 Spyder convertible, 180'69 500 110 PG Such is the human race.  Often it does seem such a pity that Noah didn'tmiss the boat. - Mark Twain _______________________________________________This message was sent by the VirtualVairs mailing list, all copyrights are the propertyof the writer, please attribute properly. For help, mailto:vv-help at corvair.orgThis list sponsored by the Corvair Society of America, http://www.corvair.org/Post messages to: VirtualVairs at corvair.orgChange your options: http://www.vv.corvair.org/mailman/options/virtualvairsArchives: http://www.vv.corvair.org/archive.htm_______________________________________________