317 heads for turbo

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09-16-2011, 12:41 AM

Chevyboss22

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317 heads for turbo

hello everyone im in the middle of a build and i found a great deal on 317 heads my question is are these good turbo heads for a stock 4.8 or should i keep the stock heads

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09-16-2011, 12:45 AM

02'Z71ONDUBZ'

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What heads do you have

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09-16-2011, 12:45 AM

stock48

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I would stick with the stock head if it were me. Adding studs, or ARP head bolts wouldn't be a bad idea.

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09-16-2011, 12:56 AM

Chevyboss22

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I have the stock 862 heads on it now.

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09-16-2011, 04:20 AM

ltr450ryder

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Run the 862s or your cr will drop a lot 862 chamber are 61.15cc and stock 317s r 72cc

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09-16-2011, 08:22 AM

Rick_Vor

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Quote:

Originally Posted by ltr450ryder

Run the 862s or your cr will drop a lot 862 chamber are 61.15cc and stock 317s r 72cc

My thoughts exactly. It will be a dog out of boost with low-mid 8's compression.

How much boost are uo going to run?

Rick

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09-16-2011, 09:57 AM

kbracing96

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Keep your stock heads, I put 317 on my 5.7 and wish I had more compression now. I want 243/799 heads...

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09-16-2011, 02:02 PM

cwalker2006

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Yea I have my stock 317s on and when my motor was built they put in dished pistons. I've asked them several times for the parts list but I never got one. But they said it was abour 8.2:1 cr and it sucks out of boost!