New ls-3 rhs as cast heads
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Teching In
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New ls-3 rhs as cast heads Anybody have any personnel experience with the new as cast RHS LS-3 heads or the as cast Dart PRO1 heads? How much they flow and do they make more HP than the stock LS-3 head? Thanks
TECH Enthusiast
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I have run darts on my car. Its a turbo car so alot of my experience probably wont help you. If i was supercharged it would be different becuase youd see boost go down and power go up. With a wastegate it still gives you the same 15 pounds no matter what. I know i had to add a good amount of fuel to keep it happy. I was picking up 45hp for every pound of boost and that went up to 60hp per pound after the heads and high ram install. Hard to say if that was because of the heads or being in a different part of the turbo map. Ive been told the big ports will effect driveability but my engine didnt seem to change. That may have been cause of the 3800 stall absorbed alot of power down low anyway so i didnt notice it. They work pretty damn good for me. No complaints.
Kinda priced right, hard to find LS3 cores for what they’re selling for. Called RHS a few months ago and their tech told me they’re just a replacement head and had no flow numbers, I’m guessing they flow a little better than OEM castings. They have bronze guides and the finished product looks like good quality, $433 bare each on eBay, $633 each with valves and dual springs by the same seller. Not a bad way to go if you have to find cores and have those rebuilt.
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Thread Starter
Teching In
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Headers, 3 in. H pipe out the rear,cold AIR, Baby cam,216x226 3.50 rear 6l80 65 chevelle Pro-Touring type car and I know I will only get about 15 HP gain & 15 TQ from heads, That will be 15 more than i had! Thanks from Louisiana
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Teching In
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Cam Motion LS-3 stage 2 216x226 116+3 It idles good and drives good in town, I dont want to screw that up ! But I would like to have 15 or 20 lbs of TQ than i have now! Thanks It will NEVER see a drag strip (MAYBE ONCE) just to see??? Thanks again, oh Looks like my best bet is to just have my heads CNC ton of people that do that!
Cam Motion LS-3 stage 2 216x226 116+3 It idles good and drives good in town, I dont want to screw that up ! But I would like to have 15 or 20 lbs of TQ than i have now! Thanks It will NEVER see a drag strip (MAYBE ONCE) just to see??? Thanks again, oh Looks like my best bet is to just have my heads CNC ton of people that do that!
Joined: Jul 2007
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From: ELSA, South TEXAS (956) 802-7700
Cam Motion LS-3 stage 2 216x226 116+3 It idles good and drives good in town, I dont want to screw that up ! But I would like to have 15 or 20 lbs of TQ than i have now! Thanks It will NEVER see a drag strip (MAYBE ONCE) just to see??? Thanks again, oh Looks like my best bet is to just have my heads CNC ton of people that do that!
TECH Senior Member
Joined: Jun 2016
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From: Central Cal.
Good thinking! The gaskets will keep quench within bounds, while milling will get the C.R. where you want it.
If it's at the shop yes cut the heads.