Camshaft for 86mm Big Bore engine

For those who couldn't care less how their 356 left the factory!
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Adrian Rendle
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Posts: 79
Joined: Fri May 24, 2013 3:47 pm
Location: Surrey, England

Re: Camshaft for 86mm Big Bore engine

#31 Post by Adrian Rendle » Mon Jan 29, 2018 3:56 pm

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

Adrian Rendle
356 Fan
Posts: 79
Joined: Fri May 24, 2013 3:47 pm
Location: Surrey, England

Re: Camshaft for 86mm Big Bore engine

#32 Post by Adrian Rendle » Mon Jan 29, 2018 4:32 pm

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?

Miguel Antonetti
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Joined: Mon Apr 14, 2014 2:43 pm
Location: Birmingham, Alabama

Re: Camshaft for 86mm Big Bore engine

#33 Post by Miguel Antonetti » Wed Jan 31, 2018 4:52 pm

...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...

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PaulLima
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Joined: Fri Jan 10, 2014 2:02 pm
Location: Carson City, NV

Re: Camshaft for 86mm Big Bore engine

#34 Post by PaulLima » Wed Jan 31, 2018 7:14 pm

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.

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