853 vs. 241 heads
02-26-2007, 04:06 PM
#1
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853 vs. 241 heads I am second guessing myself, need some extra advice.
I am about to swap out my stock 241 heads off my '04 LS1 GTO for some Stage 2E ported heads from MTI, casting #853. These heads flow avg 294 @.600 for the intake and 208 @.600 for the exhaust.
Since this seems like going backwards (from the 241 heads), any good argument why I shouldn't do it or is there differences I have not accounted for? Is the later manufactured heads any different?
Funny part is one head is notched, the other aint. Now I need a pair of mixed head gaskets.
I am about to swap out my stock 241 heads off my '04 LS1 GTO for some Stage 2E ported heads from MTI, casting #853. These heads flow avg 294 @.600 for the intake and 208 @.600 for the exhaust.
Since this seems like going backwards (from the 241 heads), any good argument why I shouldn't do it or is there differences I have not accounted for? Is the later manufactured heads any different?
Funny part is one head is notched, the other aint. Now I need a pair of mixed head gaskets.
02-26-2007, 05:20 PM
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Originally Posted by Sharpe
You should do it and sell me your 241 heads for $200 shpped. Seriously.
Sorry. Don't have anything constructive to add.
Sorry. Don't have anything constructive to add.
Anyone else?
02-26-2007, 06:08 PM
#4
I honestly see no reason not to swap to the ported heads you have. From my understanding the 241's are only marginally better stock compared to 853's....and when ported they flow about the same. So I say run those MTI ported 853's.
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02-26-2007, 07:09 PM
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Yeah some 853s are notched. I'm looking at a set right here that are notched.. Also, the 241 vs. 853 question, the difference is VERY minimal between those two heads and it's only there before port work is done. Once ported, it doesn't matter what casting # you started out with. The semi-permanent molded heads only were better stock-for-stock.
Ben T.
Ben T.
. I also noticed that you are at fort belvoir which is right around the corner from where im at 
02-27-2007, 05:44 AM
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Originally Posted by GuitsBoy
Good to know.
Either way, you can run notched gaskets on un-notched heads.
Either way, you can run notched gaskets on un-notched heads.
02-27-2007, 10:24 PM
#13
Originally Posted by Studytime
The 853 heads and the 241s use the same rocker arm covers.
Ben T.
Ben T.
