Re: Vintage LM Race vintage tachymeters | <– Date –> <– Thread –> |
From: LS (lashdeep![]() |
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Date: Fri, 5 Jan 2007 11:18:50 -0800 (PST) |
Tom, I hope you don't think you can just drop a reference to a Chevron B-17 and then not elaborate more about the car. What do you think this is? A loosely car based forum for people to talk about lettuce, watches, and cats?? :) Please...tell us more about the Chevron and the Lotus...any pics?? Thanks, LS ----- Original Message ---- From: "f2kracer [at] aol.com" <f2kracer [at] aol.com> To: lashdeep [at] yahoo.com; red5hilser [at] aol.com Cc: ferrari [at] ferrarilist.com; Staxwax [at] aol.com; len_ashburn [at] hotmail.com; alexzanardifan [at] hotmail.com; MaxEd49 [at] aol.com Sent: Friday, January 5, 2007 8:05:16 AM Subject: Re: [Ferrari] Vintage LM Race vintage tachymeters I don't recall an adjustment mechanism for the delay interval on any that I had; the Smiths tach on my Lotus 20 (1962 vintage) definitely had that type of tach, and I think my Chevron B-17 ('70ish) did also. Tom Pattison f2kracer [at] aol.com f2kracer [at] hotmail.com -----Original Message----- From: lashdeep [at] yahoo.com To: f2kracer [at] aol.com; red5hilser [at] aol.com Cc: ferrari [at] ferrarilist.com; Staxwax [at] aol.com; len_ashburn [at] hotmail.com; alexzanardifan [at] hotmail.com; MaxEd49 [at] aol.com Sent: Thu, 4 Jan 2007 5:36 PM Subject: Re: [Ferrari] Vintage LM Race vintage tachymeters That's interesting... Is the timing interval adjustable on most of the vintage chrono tachs? It doesn't sound so accurate real time, but if the interval could be changed it could become relevant. Upon studying *some* of the older British cars, I'm constantly amazed at how much engineering those Englishman mastered. They set the standard in many areas. The Salisbury rear and torsion bar suspension are pretty cool. The XKE is one of the most advanced cars of the era with regards to road manners. Now, if they had only discovered dialectic grease... Thanks for the reply, LS ----- Original Message ---- From: "f2kracer [at] aol.com" <f2kracer [at] aol.com> To: red5hilser [at] aol.com; lashdeep [at] yahoo.com Cc: ferrari [at] ferrarilist.com; Staxwax [at] aol.com; len_ashburn [at] hotmail.com; alexzanardifan [at] hotmail.com; MaxEd49 [at] aol.com Sent: Thursday, January 4, 2007 4:59:06 PM Subject: Re: [Ferrari] Vintage LM Race vintage tachymeters I believe what you're referring to were known as chronometric tachs, and that intermittent action was done to make them more readable at speed (while racing) Tom Pattison f2kracer [at] aol.com f2kracer [at] hotmail.com -----Original Message----- From: red5hilser [at] aol.com To: lashdeep [at] yahoo.com Cc: ferrari [at] ferrarilist.com; F2KRACER [at] aol.com; Staxwax [at] aol.com; len_ashburn [at] hotmail.com; alexzanardifan [at] hotmail.com; MaxEd49 [at] aol.com Sent: Thu, 4 Jan 2007 4:04 PM Subject: Re: [Ferrari] Vintage LM Race vintage tachymeters Beats me. Back in the 1950's/60's, when I used to haunt the pits at such places as Riverside, Pomona, Paramount Ranch, and Laguna Seca, it was common in pure race cars to see the tachs move in increments of a few hundred revs. It was so common that I think it was SOP. Both Smiths in the British cars and Jaeger in the Italian Ferrari's Maserati's, and OSCA's were the same. My Jaguar XK120 and Austin-Healey 100 had mechanical Smiths which were smooth, but they were road machines. I remember watching Carroll Shelby warm up John Edgar's 4.5 Maserati in the pits at Pomona, and the tach jumped back and forth a few hundred revs at a time as he 'bliped' the throttle. Had I known this would come up 50 years later on the List ... I would have asked 'Ol Shel' or John, who always sat in a director's chair on top of his 18 wheel hauler to watch the races. In those days the vast majority of cars were towed to the races using either a pick-up or panel truck. Needless to say, I was impressed! Yer pal, Ferrari Bubba -----Original Message----- From: lashdeep [at] yahoo.com To: red5hilser [at] aol.com Cc: ferrari [at] ferrarilist.com Sent: Thu, 4 Jan 2007 12:03 PM Subject: Re: [Ferrari] Vintage LM Race vintage tachymeters On older cars, I've only seen tachs that read a signal off of a rotating/timed engine component. Typically, this would be a distributor or a camshaft. If the tach jumps, it would have to mean a voltage problem with either the "generator" on the engine or in the actual gauge itself. I did ask a friend who restores old Jags to add thoughts. Apparently, the old XK140s used a cable that ran off of the camshaft. This cable led to the gauge which contained a plastic hub that positioned the needle. He's seen these cables get contaminated with oil leaking from the cam seal. This oil creates a problem in the hub mechanism at the gauge and can cause those erratic tach movements. So, in short...who knows!?! It would have to depend on the car and what type of tach it uses... What car were we talking about here? LS ----- Original Message ---- From: Doug and Terri Anderson <dnt [at] dock.net> To: LS <lashdeep [at] yahoo.com> Cc: The FerrariList <ferrari [at] ferrarilist.com> Sent: Thursday, January 4, 2007 9:10:39 AM Subject: Re: [Ferrari] Vintage LM Race vintage tachymeters Done on purpose and hard to duplicate by instrument restorers. Perhaps the old smooth tachs had a tendency to fly way past the actual rpm and those that stuttered were closer to actual engine rpm. Just a guess. Built in damper. DOUG ----- Original Message ----- From: "Paul Bennett" <pbennett [at] macnet.com> To: "DOUG" <dnt [at] dock.net> Cc: "The FerrariList" <ferrari [at] ferrarilist.com> Sent: Wednesday, January 03, 2007 10:03 PM Subject: [Ferrari] Vintage LM Race vintage tachymeters >I noticed in many cockpit shots of the older cars, the tachymeters > didn't increase smoothly as now, but stepped up and down in > large rpm increments. Like perhaps 3.0k > 3.5k > 4.0k >4.5k > > Any idea of why the jerkiness? > > > > Great show...18 different race start/finish and view of the > 'control room' which I'd not seen or heard of before. > > > _________________________________________________________________ > To unsubscribe or modify your subscription options, please visit: > http://lists.ferrarilist.com/mailman/options/ferrari/dnt%40dock.net > > Sponsored by BidNip.com eBay Auction Sniper > > _________________________________________________________________ To unsubscribe or modify your subscription options, please visit: http://lists.ferrarilist.com/mailman/options/ferrari/lashdeep%40yahoo.com Sponsored by BidNip.com eBay Auction Sniper __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! 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- Winding Road LarryT, January 5 2007
- Re: Vintage LM Race vintage tachymeters Doug and Terri Anderson, January 4 2007
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- Re: Vintage LM Race vintage tachymeters f2kracer, January 5 2007
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