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FS: PRC 220cc 5.3L Stage 2.5 CNC Ported Heads

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Old 01-02-2008, 11:47 AM
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What size are the combustion chambers??
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Old 01-02-2008, 03:14 PM
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Originally Posted by sprayed99
post them on ls1tech most of the f-body guys use these heads
these are already posted on ls1tech.. most of the interest is coming from there as well.
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Old 01-02-2008, 03:15 PM
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Originally Posted by joshua022
What size are the combustion chambers??
62.5cc i believe..
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Old 01-02-2008, 03:59 PM
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So you'd have to mill them a good bit to get the CR up on a 5.3?
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Old 01-02-2008, 04:50 PM
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Originally Posted by joshua022
So you'd have to mill them a good bit to get the CR up on a 5.3?
Up to what? They are speced to be 10.75:1 on a 5.3L
http://www.texas-speed.com/shop/item...id=84&catid=40
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Old 01-02-2008, 04:53 PM
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Originally Posted by joshua022
So you'd have to mill them a good bit to get the CR up on a 5.3?
i've been told different things by a lot of different people.. some say it will bump a 5.3 to 10:1 cr, some say it will stay the same but these heads will flow better since they've been ported and have larger valves.
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Old 01-02-2008, 04:54 PM
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Originally Posted by truckmann
Up to what? They are speced to be 10.75:1 on a 5.3L
http://www.texas-speed.com/shop/item...id=84&catid=40
that's on a 5.7 ls1.. just fyi. they don't say it, but i found that out after purchasing these heads.
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Old 01-02-2008, 04:59 PM
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Originally Posted by xlr82sxs
that's on a 5.7 ls1.. just fyi. they don't say it, but i found that out after purchasing these heads.
Oh well that is just **** poor advertising by Texas Speed then...
On the verge of false advertising on their part I would say.
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Old 01-02-2008, 05:49 PM
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Originally Posted by DozerDan
just to let you know paypal frowns on the seller passing the 3% onto the buyer...bump for ya...i'm kinda interested
considering how they rape the hell out of everyone with fees, id tell them to stick that policy in their ***.
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Old 01-02-2008, 06:04 PM
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Originally Posted by xlr82sxs
that's on a 5.7 ls1.. just fyi. they don't say it, but i found that out after purchasing these heads.
They would probably drop the CR a tiny bit if you put them on a 5.3 or 4.8 and didn't have them milled.
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