243 as cast gains
243 as cast gains I currently have the mods in my sig. I have an LS6 manifold on the way. I have 853 as cast heads at the moment. Would it be worth it to get some as cast 243 heads or should I save it for building a new LS2/LS3 longblock a few years down the road?
If the plan was for an LS2/LS3 in the future...Stop right there and save your $$$.
A head swap alone could cost you grand! Even if you score $500-$600 heads, don't forget the gaskets, pushrods, bolts, coolant, tools, time. My effort and time is valuable to me....I would go for CNC ported heads and a bigger cam. Your Hot Cam is pretty weak.
I also wouldnt slap 243s on an LS2 or even an LS3...If I was going 4.00" bore I would go Rect port heads.
A head swap alone could cost you grand! Even if you score $500-$600 heads, don't forget the gaskets, pushrods, bolts, coolant, tools, time. My effort and time is valuable to me....I would go for CNC ported heads and a bigger cam. Your Hot Cam is pretty weak.
I also wouldnt slap 243s on an LS2 or even an LS3...If I was going 4.00" bore I would go Rect port heads.
You are way over quoting the work.
It is not about opinions. It is about facts. I responded to hardware upgrades that he thought were necessary. Did you even ready the thread?
If you go to 243 heads you will need new push rods. I did and had to get new ones even everyone said mine would be fine. and no I don't read the posts I just look at the pictures.
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Just measure . And when i thought i was just gonna swap heads only i went ahead and did all new sensors and ls6 pcv. It was quite a bit of work taking the heads off just dont underestimate the labor of taking them off. Watch out for the while im in there bug
It sounds like your mind is made up anyway so just do it. Your telling everyone labor n time don't matter to you and the cost is hardly anything... so really why are you asking are opinion? A gain is a gain who cares how much the gain is if its only 70 bucks and time. Right? N yes always check pushrod length
Geez OP sorry for the ******* responses youve been getting on this thread. But yes, 243's would be worth it for you in my opinion, you could also go with a set of 799's either head you should be able to find for 350 bucks. You're gonna need to measure for new pushrods as well. I would use a .040 head gasket while youre at it to bump compression and get a tighter quench. Id expect over 15 rwhp gain if you do that.
Yes HP will definitely go up...but the concern is bang/buck.
Under 20rwhp gain for as cast with the mill he is talking about. Whether its worth it is up to him.
A head swap is a little messier and time consuming than some might think. I can only imagine the pain in the *** doing it under a fbody cowl.
Under 20rwhp gain for as cast with the mill he is talking about. Whether its worth it is up to him.
A head swap is a little messier and time consuming than some might think. I can only imagine the pain in the *** doing it under a fbody cowl.