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Old 07-05-2011, 09:35 AM
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Default Heads question

So i was looking at my old LS1 block out of my 99 ws6 because i was depating of parting it out....
Well i looked at the heads and correct me if im wrong...but i thought ls1s in the fbodies were equiped with 241s not 853s?
Old 07-05-2011, 09:38 AM
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I thought the '241s first appeared for '01
Old 07-05-2011, 10:35 AM
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Well thats what i am asking. My new ls1 is the 04 model and it has 241 heads. My old one has the 853s on it. I was just wondering if that was normal. And which were better?
Old 07-05-2011, 10:35 AM
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853's are 98-00 I believe.
Old 07-05-2011, 10:37 AM
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Ok. Now my next question.
Is it worth it to upgrade to 243s and a z06 cam?
Old 07-05-2011, 10:41 AM
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The 243s would be a nice improvement over the factory 853s, but Id definetly look into a different cam that would offer you much better gains than the factory zo6 cam.
Old 07-05-2011, 11:15 AM
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Ok thank you
Old 07-05-2011, 01:51 PM
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The LS6 heads are a good cheep upgrade but the LS6 cam is not worth the effort of installation. A good after market cam would be a much better choice with much better performance not to mention the kool lope at idle...
Old 07-05-2011, 02:14 PM
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241's started mid yr of 2000, my 2000 Formula has 241's
Old 07-05-2011, 02:16 PM
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Yeah i think ill give Comp a call for a custom grind.
How difficult is it to change heads/cam?
Old 07-05-2011, 02:20 PM
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go to ls1howto.com they have a good write up
Old 07-05-2011, 02:57 PM
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Thanks i always forget aboutthat site
Old 07-05-2011, 03:04 PM
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Originally Posted by BashamWS6
Yeah i think ill give Comp a call for a custom grind.
How difficult is it to change heads/cam?
Well, to make it relative, there is not an easier V8 out there to do heads and cam on...




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