Steve, I used Marvel Mystery oil on my TR6 and it's always worked well. No dashpot oil is bad for a street car, however for performance engines or race motors no oil is preferred. On the spitfire I run with no oil or spring. I want the piston to go all the way up as fast as possible.
The test that needs to be done is a relationship between viscosity of the oil and speed with which the piston rises and how this relates to mixture at part throttle, full throttle and no throttle. What you are looking for is a weight of oil that makes YOUR car in it's present state come off of idle well under load and no load. At full throttle is doesn't much matter what the weight of the oil is as the piston will be all the way out no matter what...it's just how fast do you want it to get there...trial and error I guess. Aaron Johnson #38 F-Prod Spit Mk IV Oregon Region SCCA ----- Original Message ----- From: Steve Carter To: [EMAIL PROTECTED] Sent: 21 June, 2003 05:20 Subject: Dashpot oil Fellow spitters, I'm still puzzled over the mysteries of what oil to use in my dashpots (mkII spit on twin SU HS2s) as far as I can figure, lighter dashpot oil is better, but no dashpot oil is bad... How do I judge the tradeoff? Can anyone explain this in simple terms to a simpleton like me?! Cheers, Steve /// [EMAIL PROTECTED] mailing list /// Send admin requests to [EMAIL PROTECTED] /// or try http://www.team.net/cgi-bin/majorcool /// Archives at http://www.team.net/archive /// Send list postings to [EMAIL PROTECTED] /// Edit your replies! If they include this trailer, they will NOT be sent.
