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1. What is normal RPM at 55 MPH for a 72 Spit? (score: 1): Author: Unknown; Date: Mon, 28 Jul 97 20:58:37 -0400; I have my Spitfire on the road after the PO kept it in the grass for 3 years. I think it runs amazingly well given its age and my expertise... It indicates 3500RPM at 55 MPH. Is this about right? It; /html/triumphs/1997-07/msg01671.html (7,526 bytes)
2. Re: What is normal RPM at 55 MPH for a 72 Spit? (score: 1): Author: Unknown; Date: Mon, 28 Jul 1997 20:57:27 -0500; I presume my 76 has the original rear end, no overdrive Robson and Langworth say US 72 should have 4.11 ratio with 15.9 mph/1000 RPM in 4th gear and 76 should have 3.89 diff ratio with 16.7 mph/1000; /html/triumphs/1997-07/msg01676.html (7,089 bytes)
3. Re: What is normal RPM at 55 MPH for a 72 Spit? (score: 1): Author: Unknown; Date: Tue, 29 Jul 1997 12:06:25 -0600; You can figure out stuff like this quite easily. There is a simple spreadsheet program in ftp.team.net/pub/misc/gear.sc that does things like figure out mph in various gears. From the chart below, yo; /html/triumphs/1997-07/msg01730.html (8,204 bytes)

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