Stock 6.0. should I put 5.3 heads on it or leave 317s with nitrous.

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Aug 27, 2013 | 02:04 PM

#11

tim wellington

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From: eastern nc

5.3 heads

aren't the vavles smaller in 5.3 (706) vs 6.0 (317) .i wouldnt trade valves for compresion.

Aug 27, 2013 | 02:05 PM

#12

Mangled03gmc

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From: In a van DOWN BY THE RIVER

Have the 17's milled to bump compression up, have a mild job done on them IMO. It will save ya a few bucks vs buying a new set of 2.5 heads. Unless the 5.3 heads you have are the 799/243 heads.

Aug 27, 2013 | 02:32 PM

#13

shawnss

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From: billings Mt

Quote:

Originally Posted by Mangled03gmc

Have the 17's milled to bump compression up, have a mild job done on them IMO. It will save ya a few bucks vs buying a new set of 2.5 heads. Unless the 5.3 heads you have are the 799/243 heads.

I was thinking of Buying a new set of the PRC 2.5 5.3l cnc ported heads. with 56cc chambers. to bump it up. can I have the 317s milled enought to bump the compression up? I don't know what is to much for 317's. but I do know that a stock lq4 will be a dog with lower compression. I'm bummed because the day before I went and bought my LQ4 they sold a LQ9 with 70k on it for the same price

Aug 27, 2013 | 06:13 PM

#14

Blackpanther99

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From: Baytown, TX

Milled 243s any day. 317s arent bad at all though. You can just get them milled.

Aug 27, 2013 | 06:25 PM

#15

grey matter 04

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From: gonzales,LA

the ported PRC 5.3 heads will definately be better than a set of stock 243 or 317s
You will also have alot more compression with the prc heads

All in how much you want to spend and your goals