Can you tell from this pic?
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Can you tell from this pic?

  1. #1
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    Default Can you tell from this pic?


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    Senior Member EdonShano's Avatar
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    Quote Originally Posted by terrible_buddhist View Post
    stock rods chinese crank??????
    Formally know as UNFORGIVEN...

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    Quote Originally Posted by terrible_buddhist View Post
    What are the letters and casting number on the two rear crank weights? I think it's a forged GM crank.

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    It is a GM crank & rods...I will have to see if I can zoom in on the numbers. It is a pic I took a while ago when I was putting the engine back together and putting on the turbos.

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    I can't seem to pull any more numbers off the pics

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    Default crank

    You should be able to tell pritty easy cast will have a small line were it was cast and a forged crank will have a wide forging line i think its by one of the rod journals back by the oil pump.

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    Default crank

    Sure looks cast to me but what the hell do i know i needed help the other day figuring out what block i have.

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    Quote Originally Posted by EdonShano View Post
    stock rods chinese crank??????
    Not unless GM has already started casting cranks in China. It has "GM" on the rear counter weight.

    Cast GM crank, 3/8 rods, and cast (possibly hyper) pistons, all stuffed in what appears to be a perfectly good 4 bolt block



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    The pistons are forged. I replaced them when I had the engine rebuilt since I knew I was going to be putting a banks system on it, or at the least NOS. I did NOS for a little while, and then decided to do the banks.

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    Oops, just a guess. Kind of hard to get a good look at the pistons. I am guessing TRW/Speed Pro replacement.



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    Senior Member EdonShano's Avatar
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    Quote Originally Posted by gn7 View Post
    Not unless GM has already started casting cranks in China. It has "GM" on the rear counter weight.

    Cast GM crank, 3/8 rods, and cast (possibly hyper) pistons, all stuffed in what appears to be a perfectly good 4 bolt block
    Didn't see the GM tell i really blew the pic up...But it won't be long before the Chinese start casting replacement cranks with GM markings
    Formally know as UNFORGIVEN...

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    damn you're good.

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    If you look at the inside of the #6 skirt you can see what looks like black smeared streaks in the alum. Only TRW/Speedpro forgings seem to have that, along with the skirt shape.
    I should have know they weren't plain cast becasue they almost always have a steel strut reinforment around the pin, hyper cast don't.




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    so, the set up should be good until it blows up, right?

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