740 hp GSF?
Calling the 2UR in its stock state "highly tuned" is pretty short sighted. I built road race motorcycle engines that won championships. Motorcycles are a lot closer to "highly tuned" than any production car engine especially when they're producing over 250 hp per liter and sitting on a showroom floor.
That's what FIA thought when the banned turbos. It's all about bore and stroke. No Detroit product could ever do that with a less than 1.6 rod ratio on a 100mm stroke (or more), but properly designed, sure, it can be done. Just don't expect it to be a torque monster down low.
Last edited by lobuxracer; Jun 2, 2017 at 05:40 PM.
I think your physics needs a bit of work.
100mm stroke V8 @ 18,000 RPM with 1.6:1 rod ratio (your own figures: "properly designed, sure, it can be done")?
Take a guess where that puts the piston acceleration, and mean piston speed, of that engine compared to current very highly stressed F1 engines?
Hint: it's different.
100mm stroke V8 @ 18,000 RPM with 1.6:1 rod ratio (your own figures: "properly designed, sure, it can be done")?
Take a guess where that puts the piston acceleration, and mean piston speed, of that engine compared to current very highly stressed F1 engines?
Hint: it's different.
Wide piston say 141mm. Small stroke, say 40mm. 18k rpm mean piston speed 24 m/sec. No big deal.
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