My 1999 Honda Civic EX has a forged steel crankshaft and connecting rods. That may be a big factor in how smooth and easy revving the engine is, and how well it is doing at 179,000+ miles. Who still puts forged crankshafts in engines? Which engines? How important is it for smoothness, longevity, o…

You won’t feel the difference in driving a car with a forged crank if the engines are otherwise identical. A forged crank is used if you want more horsepower or rpm than a cast crank will tolerate. Sometimes a forged crank is used when a passenger car engine design is used in a truck or marine use …

I was thinking the same, as far as difference in feel. I wouldn’t think forged crankshafts would offer huge reliability advantages in normal commuter car driving either, but I could be wrong. Crankshaft failure in a daily driver has got to be rare. But I could be wrong. Forged connecting rods, those…

Steel weighs about 0.278 lb per cubic inch whether it’s cast or forged. Really I think we should call forged parts swaged parts. The forge is the furnace that the blacksmith uses to heat the work. A swage is a tool used to give that red hot part a certain shape, similar to a mold. “Easy revving”…

[image] shanonia: My 1999 Honda Civic EX has a forged steel crankshaft and connecting rods. That may be a big factor in how smooth and easy revving the engine is, and how well it is doing at 179,000+ miles. I put a quarter of a million miles on a '91 Geo Metro with a 1 liter 3 cylinder engine…

[image] shanonia: That may be a big factor in how smooth and easy revving the engine is, and how well it is doing at 179,000+ miles. It’s not [image] shanonia: Who still puts forged crankshafts in engines? Most engines that feature forced induction will have a forged crank, as will ma…

I sold my '98 Civic to a friend with about 100k miles on it. A year later, she put a rod through the crankcase “passing a semi on the interstate.” ;-]

Compression ratio, torque demand and the layout of the crankshaft have seemed to be the critical reasons for using a forged rather than cast crankshaft. In line 6 cylinder engines and 90* V-6 engines with stepped rod throws forged steel would seem more critical while V-8 and 60* V-6 engines put less…

Smoothness in a crankshaft is about balance rather than processing of the material of which it’s made. Smoothness as regards connecting rods has to do with stroke and weight. Connecting rods are what’s known as “reciprocating masses”. They change direction and go up and down thousands of times a m…

Whose engines have forged crankshafts?

Maintenance/Repairs

George_San_Jose1 December 9, 2017, 1:23am 9

A few years ago the group here chatted at length about how crankshafts are manufactured. OP might find that thread (below) interesting to read through. I found the experts here and their discussions on the subject very interesting. My plan is that when I finally need to retire either my truck and Corolla, I’ll retain the crankshafts and install them in my living quarters as a reminder of all the fun places they took me.

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Whose engines have forged crankshafts?

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