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Old 01-19-2005, 12:25 PM
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Forged Crankshafts,Pistons, or Rods

Hi there,

Say that you were building a motor and you had a little extra cash to burn. Would you burn it on a forged crank, forged rods, or forged pistons? When looking at the parts that go into some crate motors, sometimes you see reconditioned connecting rods with forged pistons or a forged crank with cast pistons. So if you were to spend your money on a forged part in the shortblock, which would it be a why? Thanx for any replys. Just a curious question i guess.

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Old 01-19-2005, 12:29 PM
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The first upgrade that makes sense is pistons. That is definately the weakest link in stock parts for most engines. While making that upgrade it makes alot of sense to get quality forged pistons instead of the cheapo's. The good stuff is much lighter and will make the rods and crank live longer due to reduces reciprocating mass.

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Old 01-19-2005, 12:45 PM Moderator

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I agree with chris. If i only had the money for one thing it would be the pistons..... It's amazing what the stock crank and rods will put up with abuse wise in a well tuned engine.....

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Old 01-19-2005, 12:49 PM
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I would have to agree also. I think a set of forged pistons and some ARP rod bolts could go a long way. I have rarely heard of a crank breaking. Other than piston problems, the other main thing that gives is usually the rods at the bolts.

Good luck
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Old 01-19-2005, 01:03 PM
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Racing adds a different slant to engine parts as opposed to a street car. When running a tranny brake and slicks you can break a crank. So a street car doesn't need a forged crank. Most engines I have seen blow, have been due to rod failure. Going out of round, spinning a bearing, or just plain snapping in two. Lastly is pistons pins knocking or burning a hole through the top. Burning a hole in a piston is generally from bad fuel air mixture. This will burn a hole through a forged piston just as easily. You can also buy better quality cast pistons. My recommendation is forged rods, then forged pistons, and a crank if your racing.
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Old 01-19-2005, 01:36 PM
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Bracketeer, you said pretty much what I was going to say. In my thinking I agree with everyone else. Forged pistons are hard to beat and the new ones are less prone to piston knock that older ones used to have.
One thing to think about too is that when you buy a new rotating assembly they are new and often times better parts. example would be a cast 9000 scat crank is much better then OE cast cranks and holds up for most uses.
I and H beam rods are generally stronger then stock rods and with ARP bolts(option with most kits) there should be no problem.
Pistons would be a place where I would not skimp out on. Forged pistons are a nice safety net in case something goes "a little" wrong. Also for future use they often times come in handy when "upping the power".

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