icerutti | Jun 13, 2012 1:00 pm |
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Subject: Zenith 36 UH - Lagonda 2 Litres Speed Model Setup Hi, My 2 Litres Speed Model is fitted with 2x Zenith 36 UH carburetors since new. Present I’ve got a jet’s setup of: - Main : 90 - Compensator : 125 - Slow running : 55 Currently I’m running Newman’s cam’s. I’m not very happy with setup mainly for two reasons: - Running to reach during the summertime (hot air) - At high revs, above 4000 rpm’s the car have some hesitation doing quickly more (I would like to reach 4500 rpm’s without hesitation) Does anyone know or has a better experience than my ? Does anyone know the setup of the former Lagonda 2 Litres Works cars using twin Zenith ? Any advice or experience is highly appreciated. Thank you very much Best Regards Igor |
Julian | Jun 14, 2012 12:45 pm |
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Subject: Re: Zenith 36 UH - Lagonda 2 Litres Speed Model Setup Dear Igor, Unless you have modern type steel connecting rods at least and prefferably a modern counterweighted steel crank also, then you would be EXTREMELY ill advised to go more than 3750 rpm on a regular basis! Your standard rods have a thickness smaller than your little finger at the small end and this added to a "mean" piston speed of over 3500 feet per minute, and a peak of over 5800!, you are asking for your engine to do a very good impersonation of a hand grenade! I hope this elevates the need to re-jet your carburettors which must be working well for you to be able to get to 4000+ in the first place! Regards, Julian |