Actually, it's not. Forgings start off with a piece of metal that is heated to high temps and is then pounded into shape using dies. The grain structure of the metal is maintained. Powdered metal starts off with a blend of metallic powder that is placed into a form and submitted to extreme pressure. It is then sintered to below the melting point, which combines the metal molecules. The only thing they have in common is an elevated temperature step.
"Forged powder-metal connecting rods link the crankshaft and pistons. They are forged under extreme pressure from alloy metals reduced to powder, rather the melted to liquid, for a balance of low mass and high strength"
from the GM powertrain website describing the LSA
Really? Your're quoting from a GM marketing website to prove your point? I hardly think their misuse of the word 'forged' constitutes any form of validation.
Go to Wikipedia and search on the terms 'forging' and 'powder metallurgy'. It should be very enlightening.
I don't wish to engage in a pissing contest with you, so this will be my last post on the subject.
Yes, I am quoting from GM. I don't know enough about forging first hand to use my own knowledge Lol. No pissing contest here.
I have read in several magazines that the LSA has forged rods as well as the GM site. I know nothing about forging, but I couldn't see GM flat out lying?
@mike forged rods are in the lsa. titanium are in the ls9. the price difference is insane between the cost of the titanium rods and forged rods.
so I think I saw this answered but would an ls9 block bolt in the place of the lsa block? what additional things would be needed then? the rods sound strong regardless, so the head and rest of the rotating assembly make the difference, and the blower.
that forging/powdering difference sort of seems like a paint/powder coat argument. pretty cool stuff I read up on with the Wikipedia citations (see the bottom of most Wikipedia pages).
Much of what what does to the LSA and driveline in the Cadillac was to keep it quiet and/or civilized. An LS9 will bolt in nicely...
Not "true forged rods". Sinter forged is completely different than a true forged I beam like in the 03/04 cobras.
I don't expect to get this back on track but I was looking at the differences as it relates to making horsepower not durability. I know the LS9 has a bigger supercharger and a bigger cam. I was wondering about heads, injectors, heat exchangers, exhaust manifolds, etc. If you care to pick it back up.
Thanks. This contains most of what I was looking for.
Can you upgrade the supercharger and cam to LS9 specs?
What of exhaust differences?
I believe the ZR1 makes 11 psi stock, vs our 9psi, so add upper pulley(12 psi) and tune and you're making ZR1 power(only weigh about a 1000lbs more lol). I'm sure this will start a debate, but I've seen some reports that show the "dry sump" oiling system(ZR1) requires MORE hp to operate compared to a wet sump. Injectors are the same, heads(don't know).