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While watching the Formula One season opener in Australia last night, they mentioned that the maximum piston acceleration in a modern 3.0L V10 Formula One engine exceeds 10,000 G's. Also they mentioned a figure of something like 3,000 rpm/sec which the crank accelerates at. Also, these engines rev to 19,000 rpm, and produce over 900hp (naturally aspirated), so comparing these to a road car engine is pointless, but I'd just like to know.

What I would like to know is, what would those figured be on a high-tech road-going engine like unit found in an S2000, RSX Type S, or even an NSX, etc...

 
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Nobody? 21 views and not one reply...

 
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not sure what it is thats prob why

 
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i don't quite get what you are asking ?

 
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arnt you asking what the piston rate my be with a rsx, s2000, or nsx.. I will like to throw in a 2001 civc ex also .. who knows?

 
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All I know is that an Sentra Spec-V is supposed to have a hugely fast piston speed almost on par w. a formula one car and thats why the redline is so damn low.

But that doesn't answer any question you asked...

 
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that doesn't make any sense, the speed of the piston is how fast it is moving up and down which is directly related to how fast the engine is revving, as well as how long of a stroke the engine has, so if it was a LOW revving engine, it can't have a high piston speed unless it has a rediculously long stroke. F-1 engine have a VERY short stoke and a much larger bore, that way they can rev higher.

I dont' have the time right now, but the way you'd calculate the SPEED of the piston at a given rpm, is by taking the stroke of the cylinder, and then determing what the time frame it takes for it to move from btc to tdc, you'd do this by taking whatever rpm you're at, IE, 3000 let's say, and then figuring out the revolutions per hour, and then multiply that number by 2, and the lenght of the stroke and that will give you the speed in whatever units the stroke is in.

Speed in whatever unit/ hour = (RPM*60)(2 strokes per revoluiton)(Lenght of stroke)
as far as acceleration, you'd have to graph a line to that equation, and then take the derivative of that...

HAVE FUN....

 
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I was also under the impression that the Spec V did have a long stroke, which is why it wasn't high revving, which is why it had a high piston speed. I don't think the stroke is ridiculously long, but it was enough to warrant a high enough piston speed to necessitate the car being not-high-revving.

 
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And the engine isn't terribly low revving, the RPM cutoff is somewhere up above six thousand, but people are always complaining about hitting the rev limiter. I was speaking relative to F1 cars and higher revving imports like an S2K.

 
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this might be off topic but dont f1 cars have pnumetaic(sp?) valves? how do they work?

 
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Yes, they do The following is taken straight from Ferrari's website. This data is on the Championship winning 2000 contender, the Ferrari F1-2000 (because they give more information on it than the new cars, so that teams cannot collect data on their cars.)

F1-2000
Years of Activity:
2000
Engine:
3000 Ferrari (Type 049), V10, die-cast aluminium
Fuel & Lubricant:
Shell
Total Displacement:
2,997 cc
Max. Power Output:
over 770 hp (probably around 800hp, nowadays they're well over 900hp)
Timing Gear:
pneumatic valve gear, 40 valves
Fuel Feed:
Magneti Marelli digital electronic injection
Ignition:
Magneti Marelli digital electronic ignition
Transmission:
Rear-wheel drive, longitudinal semi-automatic sequential electronically controlled 7-speed gearbox + reverse, limited-slip differential
Chassis:
Carbon-fibre and composite honeycomb
Front Suspension:
Independent, push-rod activated torsion arms
Rear Suspension:
Independent, push-rod activated torsion arms
Brakes:
Ventilated carbon-fibre discs
Length:
4,397 mm
Width:
1,795 mm
Height:
959 mm
Front Track:
1,490 mm
Rear Track:
1,405 mm
Kerb Weight (with water and oil):
600 kg (including driver)
Tyres:
Bridgestone
Wheels:
13" (front and rear)

 
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Piston speed for stock cars is limited to about 3,500 feet per minute. A well built motor with forged rods and pistons can reach 4,000 fpm. Beyond that, you start yanking your rods and pistons apart in a street motor. A purpose built drag race motor can hit 5,000 fpm.

 
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So, what would that be in terms of G's? Because, like I said, an F1 engine sustains over 10,000 G's of force when the piston is in motion.