Generation III Internal Engine 1997-2006 LS1 | LS6
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which heads to buy

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Old Dec 17, 2013 | 11:36 PM
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Default which heads to buy

Before summer I am going to do a heads cam swap (since I have a lifter making noise) just curious what you guys think. I'm leaning towards the 2.5 ls6 heads with the ms3 cam from Texas speed. Should I get those heads milled? Should I just go with the 5.3 heads? Also what about oil pump/timing chain? Annnd lol what about injectors


Thanks for the input!
Matt
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Old Dec 18, 2013 | 11:19 AM
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The 2.5 LS6 cylinder heads are a great way to go with the MS3, but we will have to keep them at a standard chamber of roughly 64cc to insure proper clearance assuming your still using the standard LS1 piston. If your wanting to bump compression and you have an extra hundred to spend I can get you into our PRC aftermarket casting 225 As-Cast cylinder head that features a thicker deck, larger valves, laid over valves for increased piston to valve clearance, and a standard chamber of 62cc which offers us a bump in compression right from the start. I've posted a link to this particular cylinder head below. Feel free to give us a call for any help with your setup.

http://www.texas-speed.com/p-3515-pr...ral-heads.aspx
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Old Dec 18, 2013 | 08:53 PM
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Alright sweet thanks! What do you think about injectors I should probably be upgrading them as well
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Old Dec 18, 2013 | 09:11 PM
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I'm running the PRC 5.3 heads with a cam very similar to the M4, and it runs very strong!
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Old Dec 18, 2013 | 09:40 PM
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get the prc 225 cast heads ,thats a good deal !
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Old Dec 19, 2013 | 09:51 AM
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I would recommend the FAST 36lb injectors. They should have no problem supplying your setup with enough fuel. I posted a link to them below so you can take a look.

http://www.texas-speed.com/p-174-fas...ons-legal.aspx
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Old Dec 19, 2013 | 11:10 PM
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Do those heads come with valves? Thanks for you're input everyone!
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Old Dec 19, 2013 | 11:34 PM
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Originally Posted by HCI2000SS
I'm running the PRC 5.3 heads with a cam very similar to the M4, and it runs very strong!
Are you running on stock injectors?
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Old Dec 20, 2013 | 09:14 AM
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Originally Posted by 02ssick
Are you running on stock injectors?
No I run Bosh 42's
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Old Dec 20, 2013 | 09:34 AM
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Originally Posted by 02ssick
Do those heads come with valves? Thanks for you're input everyone!
They do come with the valves standard.
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Old Dec 20, 2013 | 10:13 AM
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I would go with 42lb injectors also, I'm running 42's and at 80% duty cycle. The price difference isn't that much either.
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Old Dec 20, 2013 | 01:03 PM
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Always go at least one size higher on injectors than what you need.
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