Which Rods to use
Which Rods to use I have been looking at getting a set of K1 rods, but which should I go with. They have a standard rod, light weight, and supreme light weight rod. I always like to make the rotating assembly as light as possible, but still want it to be held up. I don’t really see an rpm or hp rating on the different rods they offer. Will be building a 370 engine to run with a procharger.
The real stress on a rod is the transition from exhaust stroke to intake the weight of the piston stopping and changing direction and vacuum it is pulling place it under a lot of tension.
Saw someone do the math once for an LT1 and a stock piston at 6500rpm was almost 3200lbs of tension on the rod a 68 gram lighter piston dropped the tension figure by over 400lbs.
This is why you don't see a lot of hp/rpm ratings on parts because it is all interrelated.
Building a blown motor I would find a shop you trust and then trust them, talk to them about what they want to do stay informed but trust them.
Saw someone do the math once for an LT1 and a stock piston at 6500rpm was almost 3200lbs of tension on the rod a 68 gram lighter piston dropped the tension figure by over 400lbs.
This is why you don't see a lot of hp/rpm ratings on parts because it is all interrelated.
Building a blown motor I would find a shop you trust and then trust them, talk to them about what they want to do stay informed but trust them.
