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5.3 crank in a 4.8 block?

Old Jul 13, 2004 | 09:59 PM
  #11  
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aint that a waste of time wouldnt it be better to mod what you got or go for a 6 liter
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Old Jul 13, 2004 | 10:57 PM
  #12  
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but what if u got an extra 4.8/5.3 layin around?
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Old Jul 13, 2004 | 11:08 PM
  #13  
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Originally Posted by nekkid_hill_billy
aint that a waste of time wouldnt it be better to mod what you got or go for a 6 liter
everyone automatically jumps to a 6 liter.

with the right setup, you could make any motor run fast.. its just obtaining the right combination.
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Old Jul 14, 2004 | 04:44 PM
  #14  
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well i said mod what you got rather than try to put 5.3 parts in it...you are only gonna gain a few extra ponies for a lot of work.....im a 4.8 fan
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Old Jul 14, 2004 | 06:36 PM
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You need to know the compression height if the pistons to know if its possible. Also the deck height. The comp. height is the distance between the top of the piston and the center of the hole where the pistion pin goes in. Common sense tells me that the dished 5.3 piston will have a bigger comp. height, but you never know.

Here's the formula

(1/2 stroke) + (rod length) + (compression height) < or = deck height

I guess it could be > than the deck height, but not by much!

I would try to use the longer 4.8 rod with a custom piston, in order to yield a better rod to stroke ratio, which allows the pistion to dwell a TDC longer and it slows it down. Nitrous would like that!
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Old Jul 14, 2004 | 09:31 PM
  #16  
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Originally Posted by vanillagorilla
You need to know the compression height if the pistons to know if its possible. Also the deck height. The comp. height is the distance between the top of the piston and the center of the hole where the pistion pin goes in. Common sense tells me that the dished 5.3 piston will have a bigger comp. height, but you never know.

Here's the formula

(1/2 stroke) + (rod length) + (compression height) < or = deck height

I guess it could be > than the deck height, but not by much!

I would try to use the longer 4.8 rod with a custom piston, in order to yield a better rod to stroke ratio, which allows the pistion to dwell a TDC longer and it slows it down. Nitrous would like that!
Didn't I just say all of this?? Just playin man, vanilla, do you ever make it to phoenix area?
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Old Jul 15, 2004 | 05:28 AM
  #17  
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I don't think you could get the longer stroke of the 5.3 crank and the longer rods of the 4.8 to work. You wouldn't have enough room in the piston for the pin.
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