Cylinder head volume for 83' 351w heads?
03-25-2009, 01:25 PM
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Cylinder head volume for 83' 351w heads?
I need to know the head volume for a 83' 351w, to make sure I don't go to high on compression.
03-25-2009, 01:30 PM
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Big. Very big. Don't run those. If you want better factory heads, GT40 heads essentially use 351W ports with small chambers.
03-25-2009, 01:32 PM
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I am going to have to use them for several months.
03-25-2009, 01:43 PM
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I believe it to be 69cc. Can anyone confirm?
03-25-2009, 01:43 PM
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Why? What's wrong with your heads? The chambers in those 351W heads are huge and will drop your compression quite a bit.
03-25-2009, 01:49 PM
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I am getting the motor rebuild right now, and do not have the money for new heads.
http://kb-silvolite.com/performance....tails&P_id=142
I have these picked out to go with the heads later (60cc). Would a 8.6 compression rate be that gross for now?
03-25-2009, 02:22 PM
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Oh, you're actually running a 351W? 8.6:1 isn't horrible, but it's not good either. I can't say that those heads are 69cc, though. They may be more than that.
03-25-2009, 02:28 PM
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You decided to do with the Comp Cams Roller cam kit? My understanding is that the Roller cam will work better than a flat tappet cam at the lower CR.
03-25-2009, 03:11 PM
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Yes this is for a 351w.
03-25-2009, 07:55 PM
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Bump.
03-25-2009, 01:49 PM
