6.0 lq4 carb block 243 head vs l92 head
#1
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i have a new proyect is a 2004 chevy truck a have lq4 and a compcam xr281hr 228 230 dur 571 573 lift and my question is which head is my best choise for this proyect 243 or l92 head?
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L92 heads only need specific intake rockers, exh can use cathedral head design. I would use the L92 heads, they flow better everywhere. The cam will work with both heads. The port sizes are large for a heavy vehicle like a truck but GM uses them so go for it.
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has anyone done a back to back 243 with proper cam VS L92 with proper cam? and CNC ported version of both with proper cams...... I'm building a 408 and going with CNC 243's because i want the most power under the curve with out getting killed up top
#11
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yes i understand that....... but what about cars that are not looking for big peaks but tons of area under the curve...... well guess we will see how my 243's do on my 408 when it is done
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in a truck why would you want the L92's wouldn't you want the 243's to make more low end with the weight? to me the heavier the vehicle and the taller the gear the more you want the low end and midrange...... I know comon sence....... but still people chace the hp number....... thats why my car 1970 nova with 3.25 gears is getting the 243's street car with lots of torque.
#16
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if your saying that a L92 head will make more torque then a 243 on a 6.0 then im not going to debate ANYTHING with you there are way tomany things that come into play with this then just heads...... cams intake are huge....... runner length and cam timing events
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I didn't say that, but I will say that all things being the same the L92 will not give up a significant amount of torque down low but will gain a significant amount of HP on top versus the 243, especially on a 400+ cubic inch motor. I'm sure the area under the curve is larger also. Don't fall for the "L92 heads are too big" myth.