Pauter Rod thoughts

[OldSStroker]

Mercedes F1 engine guy, Mario Illien, in a recent interview said that rod strength is what limitied rpm on their recent (2003-5) F1 V10 engines. Remember that need to run two complete race weekends vs. just a race and not even qualifying a few years ago, so it's really an endurance application of maybe 5 to 6 million revs in anger.

Without disclosing the exact bore size, Illien said he favors bores smaller than the 98 mm max. They got to about 18500 revs, so with a 96 m bore, they were at about 25.5 m/s mean piston speed vs about 24.5 m/s for 98 mm bore (shorter stroke) engines. That's about 10,000gs pulling on the rod @ TDC.

Illien said the F1 titanium rods are an I-beam design which he favors over an H-beam.

[learner1]

Keith,

Do you still have these? If so, what's the application?

By "A" frame , do you mean the old mechart rod ?
I still have a set of them, but only seven good ones and havent found a spare yet

[pdq67]

I guess I would be partial to a SBC rod made like a BBC thumb rod and made out of 300M. Of course, I-Beam.

pdq67

[frnkeore]

I posted this chart in another thread so, some of you may have already seen it. I also have what is suppose to be a Cosworth 3L V10 piston/rod combo. I haven't verified the picture.

The Cosworth was the only one to run at 20K rpm, before F1 limited rpm to 18K. 20K came when they reduced the number of cylinders to V8's and displacement to 2.4L (same bore and stroke, just 2 less cyl)