what deffernt between 241 and 243 heads ?

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Aug 9, 2007 | 03:41 PM

0utLawZ28

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what deffernt between 241 and 243 heads ?

can some one tell me the difference between the 241 and the 243 heads and wich would do better on a stock ls1 i have a cam that well be going in when i get the heads here the specs which head would be better with this cam?

Lobe lift:
0.326" i
0.568" e
Valve lift (1.7 rocker):
0.554" i
0.580'' e
Valve lift (1.8 rocker):
0.587" i
0.601" e
Advertised (total) duration at 0.006":
261° i
277° e
Duration at 0.050":
208° i
224° e
Lobe separation angle (LSA):
117

Aug 9, 2007 | 04:02 PM

transam45

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i think there both ls6 heads but im not sure but you going to need some springs for that cam i think ls6 springs max out at .550 u might try 918 if your going cheap they can handle .600 lift but you have to replace them after 30k miles

Last edited by transam45; Aug 9, 2007 at 04:29 PM.

Aug 9, 2007 | 04:08 PM

BREWS02WS6

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Wow learn to type. But the 243s are LS6 heads, better flowing than the 241 LS1 heads.

Aug 9, 2007 | 04:13 PM

Gunnar@Patriot

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A 241 casting is a LS1 head that comes with a 67cc chamber and flow around 220 stock. A 243 catings is a LS6/LS2 head that comes with a 64cc chamber and flow around 240 stock.

Aug 9, 2007 | 04:38 PM

0utLawZ28

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so can i put the 243 heads and the the cam on my car with just valve springs and will the valve clear the pistons ? or do i need push rods also will i need to tune the car or can i drive it with out a tune ?

Last edited by 0utLawZ28; Aug 9, 2007 at 04:45 PM.

Aug 9, 2007 | 05:53 PM

Omega Doom

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From: DFW,TX

Quote:

Originally Posted by Gunnar@Patriot

A 241 casting is a LS1 head that comes with a 67cc chamber and flow around 220 stock. A 243 catings is a LS6/LS2 head that comes with a 64cc chamber and flow around 240 stock.

damn, I thought they bloth flowed more then that?