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Exactly. R:S ratio, piston speed are not limiting factors. They just give you a picture of what the engine parts have to endure. You can build an engine to take anything. Better R:S ratio, lower...

42 m/s is retardedly fast. I'll bet those engines have long rods and very strong materials.

Strength of the materials used is the end all be all. But holding that and everything else the same, R:S ratio is very important. It affects the angle that the rod will get as it moves along the...

Good for an estimation when quick numbers are needed. Using the estimation formula, they get a max speed 300 ft/min less than true speed for the n54, and a max speed of 225 ft/min less than true...

Correct. But the peak speed is affected by rod length as well. Peak speed or true speed is calculated from rpm, stroke and rod length along with geometry of the crank. Mean speed is calculated by rpm...

Those numbers are all at the same rpm (redline - 8400). They have nothing to do with power band or low and high revs. If you hold the engine at 8400 rpm, the piston will still go from 0 ft/s to 6736...

Problem with mean piston speed is that when do you think you are most likely to have failure? Max speed or mean speed? After a little searching I found that the s65 rod length is 140.7mm. This is...

The equation is very long. It's the derivative of the piston position equation with respect to time. This derivative is very long.

Piston position equation is:




piston position equation =...

I wasn't defending anything or saying that the n54 was built to rev higher than the s65. I highly doubt that would be the case. My blind faith is called math and engineering. All I'm saying is that...

I think there are people already looking into this.

Those are 'mean piston speed', which is the stroke divided by time according to rpm to complete stroke. This does not account for the rod length at all. Think about the geometry of the rotating...

If someone cares to give me the rod length of the S65, I can calculate the max piston speed of the s65.

^you must know the rod length to calculate true speed. And without rod length you don't truly know if an engine was designed to rev higher. Mean piston speed will not change on an engine if you...

Those numbers are incorrect for max speed. You are giving the 'mean piston speed' which is the average over the whole stroke. The speeds are actually a lot faster. The math is not simple to get...

Stock bore is 84mm. Stroke is 89.6mm. Stock rod length is 145mm.

I have calculations for piston speed at all rpm too. It was a fun little math exercise. At 7000rpm, the pistons get up to 34.37...

There is enough sleeve to bore it .005, not sure about 0.010.

If a car catches up and passes another car that was ahead of it, wouldn't that mean it's faster? We're talking basic physics of acceleration. That's what I saw at the end of the video. Anyone can get...

Challenge accepted :)

I don't think a M3 has 100hp more, maybe if you look at a brochure. Weren't stock 1M's dynoing around 320-330whp? And stock M3s dynoing 350whp? And when is the M3 actually making more power? After...

My single turbo car will be testing the Stage 1 and Stage 2 pump. Another single turbo car will also be testing the Stage 1 pump.

As soon as either of us have tangible results, we will share. For...

Not sure if you've noticed this, but your steering wheel is on the wrong side of the car. Is that covered under warranty?

Not to mention instant torque and no real weak spot in the power band.

They just need to find a way to keep those pesky valves from dropping and grenading the motor.

My brother has a stock Z06. He would always beat me when I was FBO+meth on stock turbos. In the 1/4, it could be possible for you to beat him (just not likely), on the highway no chance.

Precision-Sport Industries (PSI) in Orlando.

They did my single turbo install.

It can take longer than you think if you don't order off the shelf parts (which usually are stock specs and have none of the nice options). Manufacturing time alone can be up to 8 weeks.