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Jun 14, 2012 12:45 pm
Jun 14, 2012 12:45 pm
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
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