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Thread: 241 heads
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10-14-2009, 06:10 PM #1
241 heads
how much of an upgrade is it from 853 to 241 heads?
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10-14-2009, 06:51 PM #2
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10-14-2009, 07:09 PM #3
Different casting. I remember something about the valves on 97-00 going bad, but not worth switching over for another stock head. If you got them for free and wanted to bump compression via milling then that's another story.
Last edited by c5z28; 10-14-2009 at 10:37 PM.
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10-14-2009, 09:36 PM #4
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BLK/BLK w/CGM Stripes- 2010 Camaro 2SS/M6
wait, what? They're the same head! 853's were early castings and 241's replaced them (or something like that). Some 853's had perimeter and some had center bolts and the 853's had the annoying notch on the deck surface ... http://www.smokemup.com/tech/ls1.php ... that's the dimensions of them (look where it says "stock LS1 head"). Actually, my setup is a mutant of the two; one 853 and one 241 (porter messed up one 241 and only had a 853 lying around to replace it), and I just got the 853 notch filled and both heads machined last week.
Now if you were going for 243 heads, you'll be bumping up compression 'cos you're losing like 2-1/4 cc's.Last edited by Mean Green Z28; 10-14-2009 at 09:51 PM.
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10-14-2009, 10:42 PM #5
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10-15-2009, 05:48 AM #6
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BLK/BLK w/CGM Stripes- 2010 Camaro 2SS/M6
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10-15-2009, 06:15 AM #7
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Navy Blue Metallic- `98 Formula M6 HdTp
Unless their ported or LS6 no stock LS1 head is going to show a power gain over another.
806 `97-98 (Perimeter bolt valvecover)
853 `99- early 2000
241 late 2000 -`04Craig
Semi Retired Street Racer
2012 Lava Red Mustang GT Coupe Brembo/3.73's
Build Date 3/17/11, Last Lava Red GT
Gone but not forgoten
NBM `98 Formula M6 HdTp
1 of 1 Build Date 3/12/98
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10-15-2009, 05:24 PM #8
man that sucks. i was honestly told otherwise. Then whats so different from the 98-2000 ls1's than the 01-02 ls1 other than the intake and cam? i guess i got burned, i paid 250 for the heads cause i was told by ls1 "pros" and "mechanics" that 241's out flow the 853's. Thats why they have diff part #'s. by the way whats a op?
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10-15-2009, 07:38 PM #9
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10-15-2009, 08:06 PM #10
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10-15-2009, 08:11 PM #11
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BLK/BLK w/CGM Stripes- 2010 Camaro 2SS/M6
you've got to shoot those people seriously. As shown in the above link, the LS6 heads (243) flow only marginally better but also have a smaller chamber to increase CR. In other words, unless you're porting etc., not worth swapping stock heads. Wait, it was already said a few times here .. lol
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10-15-2009, 08:38 PM #12
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Black / Stryker Blue- 2K WS.6/ 2K9 G8GT
stock for stock, not worth the effort. unless yours are toast, and your asking due to 241's being your replacment option...
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