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Tuning info for a Typhoon with competition mag.
Posted: Mon Jul 16, 2018 8:24 pm
by Braaap
I posted recently re spares availability for G80CS.
Well i've bought the bike 😊
Turns out it has a 600 crank in it... but due to the engine shop making a hash of boring the cylinder... it has been put back to a standard 86mm piston with a new barrel. (89mm for 600).
Does anyone have timing and mag setting info for a 600 single... and for the BTH Mag please?
Re: Tuning info for a Typhoon with competition mag.
Posted: Mon Jul 16, 2018 8:26 pm
by Braaap
Calcs suggest a cc rating around 560.
Re: Tuning info for a Typhoon with competition mag.
Posted: Mon Jul 16, 2018 8:44 pm
by Braaap
I am familiar with the technique to set timing... just need the number of degrees before top dead centre for a 600 crank,(96mm stroke)... and points gap for the BTH please.
Re: Tuning info for a Typhoon with competition mag.
Posted: Mon Jul 16, 2018 9:05 pm
by robcurrie
Braaap wrote:Calcs suggest a cc rating around 560.
557.64 cc vs 597.23 cc
Rob C
Re: Tuning info for a Typhoon with competition mag.
Posted: Wed Jul 18, 2018 3:06 pm
by Groily
Don't know about °BTDC at full advance (mid/upper 30s maybe?) but 12 thou for the points gap.
Re: Tuning info for a Typhoon with competition mag.
Posted: Wed Jul 18, 2018 4:27 pm
by Pharisee
Generally accepted at 1/2" (of piston movement) B.T.D.C. for full advance. If you know the "stroke" of your crank and the centre distance of your connecting rod (gudgeon pin to big end journal)... which I don't, unfortunately, it's simple geometry to work out the degrees of crank rotation that will give you the 1/2" B.T.D.C position.