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ddgonzal |
Posted: 2010/3/26 5:12 Updated: 2010/3/26 5:12 |
Moderator Joined: 2001/5/3 From: 48 North Posts: 31599 |
Re: Knife Edged A12 Crankshaft Runs kind of rough at high RPM?
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clyons8 |
Posted: 2010/3/29 11:53 Updated: 2010/3/29 11:53 |
No life (a.k.a. DattoMaster) Joined: 2007/1/22 From: East New Britain, Papua New Guinea Posts: 6981 |
Re: Knife Edged A12 Crankshaft Not sure, I haven't been that high yet. It pulls well past 9000 apparently.
I'm not game enough to try it out though.....not yet anyway.
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D |
Posted: 2010/3/29 13:52 Updated: 2010/3/29 13:52 |
No life (a.k.a. DattoMaster) Joined: 2002/10/28 From: under the Firmament LOL no twiglight effect BS Posts: 10934 |
Re: Knife Edged A12 Crankshaft Arent the top 2nd and 3rd main arms uneven in material removed? The counterweights and rest looks good.
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clyons8 |
Posted: 2010/3/30 1:57 Updated: 2010/3/30 1:57 |
No life (a.k.a. DattoMaster) Joined: 2007/1/22 From: East New Britain, Papua New Guinea Posts: 6981 |
Re: Knife Edged A12 Crankshaft I'm not sure what the main arms are D?
Just in the process of reducing comp-ratio (don't sell e85 anymore which is sad) and running some bike carbs whilst I re-build the 45 Webers.
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D |
Posted: 2010/3/30 13:06 Updated: 2010/3/30 13:07 |
No life (a.k.a. DattoMaster) Joined: 2002/10/28 From: under the Firmament LOL no twiglight effect BS Posts: 10934 |
Re: Knife Edged A12 Crankshaft sorry maybe the incorrect terminology heres where I mean.
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clyons8 |
Posted: 2010/3/30 23:29 Updated: 2010/3/30 23:29 |
No life (a.k.a. DattoMaster) Joined: 2007/1/22 From: East New Britain, Papua New Guinea Posts: 6981 |
Re: Knife Edged A12 Crankshaft Yeah it certainly looks uneven doesn't it?
The primary objective was to lighten so I suppose the easiest parts were removed first.
Interesting stuff though.
I'll certainly have a look at it when I next have the engine apart, the motor was a proven performer though and made the 100hp atw mark before any of the major port-work was done. I'd like to see a bit more out of it with a range of experiments of differing carburetors and manifolds. I might put it on the build thread.
Basically I have three types of carburettors:
1: Big 45s with trumpets on a manifold that draws down on an angle into the combustion chambers.
2: Mikuni PHH 40's on a bpojects manifold which draws a direct side-draught into the combustion chamber, small trumpets.
3: Quad Keihin motorcycle carbs with loooong runners and small trumpets.
If I can get a good gig on the dyno I'll post the results of all three.
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1200rallycar |
Posted: 2010/4/1 5:43 Updated: 2010/4/1 5:43 |
No life (a.k.a. DattoMaster) Joined: 2002/3/20 From: Melbourne, Australia Posts: 8221 |
Re: Knife Edged A12 Crankshaft go option 4.... twin SU's.... rock on!
whats the car its going into and what is it used for?
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