Which head for a LQ4? CNC Ls3 or AI 243
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Which head for a LQ4? CNC Ls3 or AI 243
Looking to do heads and cam on my LQ4. Just not sure which direction to go Ls3 top end with these cnc heads. http://paceperformance.com/i-7139127...-assembly.html
Or send in some 243s to AI and top it off with my Ls6 intake. Opinions.
I know i will have to get a different intake for the ls3 heads.
Or send in some 243s to AI and top it off with my Ls6 intake. Opinions.
I know i will have to get a different intake for the ls3 heads.
#3
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Personally, I prefer the cathedral setup on bores smaller than 4.030. The intake valve is slammed right up against the cylinder wall for the ls3 heads, hence my preference. Not only that but unless you are willing to flycut the pistons then you are limited as to how much milling you can do, and how large of a cam you can run.
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I did a lot of research and fount that the 243 is better for a stock bore 6.0L. However if you are planning a future build of a bigger bore. Than you might consider the ls3 heads. My lq4 screams with stage 3 ported 243's. You wont be disappointed!!
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#11
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You could compromise. Install 2.08 /1.58 valves on the LS3 heads and that will complement the 4 inch bore pretty nicely.
That with the right cam would make some stout power.
That with the right cam would make some stout power.
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The ls3 heads im looking at are not stock heads the have already been cnc'd and have a 2.16 hollow intake valve now. Why would i want to go to a 2.08? check out ls3 head link in 1st post.
#13
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those cnc ls3 heads are going to have an even larger runner and youre losing velocity. it'd be fine if you had an intake that flowed as well as the heads and a motor that could use the air, but in your case I dunno...
predator certainly knows his stuff, and TEA can do the work predator mentioned to the ls3 heads. I checked on it for my 408 and I wanna say it was about $1800 including the castings.
predator certainly knows his stuff, and TEA can do the work predator mentioned to the ls3 heads. I checked on it for my 408 and I wanna say it was about $1800 including the castings.