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Re: Camshaft for 86mm Big Bore engine
Posted: Mon Jan 29, 2018 3:56 pm
by Adrian Rendle
good point Vic!.... i was in Mini-mode, siamesed ports etc......i guess its all grist to the fuel-injection mill, where duration isn't so much of a problem
Re: Camshaft for 86mm Big Bore engine
Posted: Mon Jan 29, 2018 4:32 pm
by Adrian Rendle
Jacques, i wasn't thinking of different inlet and exhaust lobes, but i suppose the cylinder pressures resisting the exhaust valve opening must be far higher than the inlet, so perhaps that accounts for the difference?
Re: Camshaft for 86mm Big Bore engine
Posted: Wed Jan 31, 2018 4:52 pm
by Miguel Antonetti
...How many of us rev to 5 grand on a regular basis?
I seldom see the tach go north of 4 myself.[/quote]
Could it be possible a survey on this subject? I'm with him, very seldom over 4K...
Re: Camshaft for 86mm Big Bore engine
Posted: Wed Jan 31, 2018 7:14 pm
by Paul Lima
When the engine is cold, 3K is it. When warm, 5K or more is routine. I love to drive this car. When I raced it, 7K was often hit. If you put it together right and treat it well, then 5K is not an issue.