"Moose Kitty" (moosekitty)
05/15/2014 at 23:46 • Filed to: None
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"Moose Kitty" (moosekitty)
05/15/2014 at 23:46 • Filed to: None | 2
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So I made a bullshit engine yesterday and a few guys had some interesting input and one in particular ranted on me quite hard. Because of that I'm going to actually make an engine concept.
To start it would be a flat twin. It would be a short stroke, over square configuration. It would have a dry sump and be water-cooled. I would like to use a dual spark plug config, but because the engine would be turbocharged using a turbo fuel stratified injection system feels like a better choice (though dual spark plugs could be used). Otherwise i would use a direct injected system with dual spark plugs.
The turbocharger would be a variable-geometry turbine to utilize the boost throughout the rev range. The engine would have an all aluminum block and aluminum pistons would also be used and have four valves each. (I forgot to say) It would be twin turbo with one of each going to a single cylinder. Each turbine would have its own intercooler also. The radiator would have a fan clutch to aid with the cooling. I would ideally like to have the engine run around 9000 rpms (maximum or if even possible) to get as much horsepower out of the engine alone, but would tone it down to around 7500 rpms if 9000 would blow the engine.
I'll make a post about the drive train I'd ideally connect it to tomorrow. Any way what do you guys think. I'm open to anything...just don't be a jerk about it. (Yeah and the article isn't very refine nor the idea, but hey it's a beginning).
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Moose Kitty
> Moose Kitty
05/15/2014 at 23:47 |
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The first image is a GIF fyi.
promoted by the color red
> Moose Kitty
05/16/2014 at 00:14 |
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One turbo/cylinder is going to wreak havoc on your timing and combustion unless you can guarantee an equal amount of boost from each turbo.
Detonation means that 9000 RPM might be a bit much for a turbo engine running on even the best pump fuel money can buy. Start thinking about compression ratios and material fatigue: this little engine's going to be working hard. Also, friction is horsepower's worst enemy. Think about how you'll minimize that.
This engine is going to be expensive and require very precise engineering. Sounds fun. :)
lonestranger
> Moose Kitty
05/16/2014 at 00:14 |
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Dacar Motorsport BMW R1200GS Twin Turbo kit. Boxer twin, air/oil cooled, electronic fuel injection, twin turbo, dual intercooler, 180 HP @8000 RPM
http://www.visordown.com/motorcycle-new…
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Moose Kitty
> lonestranger
05/16/2014 at 00:38 |
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do you know the bore/stroke ratio? just curious.
EDIT: nevermind I found it.
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lonestranger
> Moose Kitty
05/16/2014 at 00:53 |
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Oh, and I forgot to mention that it has 4 valves/cyl, aluminum, and of course it's dry sump.
samssun
> Moose Kitty
05/16/2014 at 02:02 |
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Two cylinder, revving to 9000, with two turbos? I'd think you'd want at least 4 cylinders to rev out that far, and have smooth power & boost delivery. A single cylinder would hit its turbo in very delayed pulses (one every two rpm, vs 2-3-4 for a 4-6-8 cylinder).