Where does the LS engine get it's efficiency from? - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68GMCCustom · 05-15-2011, 01:05 PM

btw.....anyone seen the new Arias hemi LSX heads?

Super73 · 05-15-2011, 10:40 PM

Those things have got to weigh 3x as much as a conventional LS head and cost stupid money if I am correct. Not saying they aren't good heads, but I haven't seen any results yet.

68GMCCustom · 05-15-2011, 10:53 PM

I think you have to have a LSX style block that supports the 6 bolt heads. I also think they're building it with a sheet metal intake, blower carb and huge 106mm (or so) turbo....for something like 2000hp?

swb85 · 05-16-2011, 03:20 PM

Those arias heads are cool, but they are stupid expensive. The canted valve stuff that's become available lately performs as well or better and is a fraction of the cost.....

*C-10 simplex* · 05-19-2011, 11:30 PM

1) Speaking on a related subject to the arias heads, the other thing that blows me away is that the lsx block can take 1500+Hp per gm and maybe 2000HP or more for only $2000! i've been a fan of the original chevy small block since i've known about them, but the more i read about the ls i would have to say it is superior to the small block.
Even the stock ls blocks can take a good amount of power.

2) Back to the subject of efficiency and forged parts: Would using forged rotating parts---crank, rods pistons have any effect on durability/longevity for a daily driven street (and occasional strip) engine?

5150.4.67 · 05-19-2011, 11:42 PM

Quote:

Back to the subject of efficiency and forged parts: Would using forged rotating parts---crank, rods pistons have any effect on durability/longevity for a daily driven street (and occasional strip) engine?

I think it all matters just how much stress you are going to put it under. Forced induction or spray? No question forged, at least the pistons.
A street mill can get away with stock crank, rods and pistons. They are all impressive for being production pieces. Texas Speed runs a Camaro with a stock bottom end and turns high 9"s!!!!!

The beauty of hypereutectic pistons is that they don't increase much in size with heat (to a point), allowing you to run tighter clearances. The downfall, you push them to the limit and they hand-grenade, unlike forged.

My $.02

05-15-2011, 01:05 PM	#26
68GMCCustom Truck and auto performance nut Join Date: Feb 2007 Location: McKinney,Texas Posts: 3,848	Re: Where does the LS engine get it's efficiency from? btw.....anyone seen the new Arias hemi LSX heads? arias_flyer_LS%20Hemi.pdf __________________ Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken

05-15-2011, 10:40 PM	#27
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: Where does the LS engine get it's efficiency from? Those things have got to weigh 3x as much as a conventional LS head and cost stupid money if I am correct. Not saying they aren't good heads, but I haven't seen any results yet. __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49 Last edited by Super73; 05-15-2011 at 10:41 PM.

05-15-2011, 10:53 PM	#28
68GMCCustom Truck and auto performance nut Join Date: Feb 2007 Location: McKinney,Texas Posts: 3,848	Re: Where does the LS engine get it's efficiency from? I think you have to have a LSX style block that supports the 6 bolt heads. I also think they're building it with a sheet metal intake, blower carb and huge 106mm (or so) turbo....for something like 2000hp? __________________ Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken

05-16-2011, 03:20 PM	#29
swb85 On a budget like Fred Sanford Join Date: Oct 2005 Location: Topeka, KS Posts: 2,031	Re: Where does the LS engine get it's efficiency from? Those arias heads are cool, but they are stupid expensive. The canted valve stuff that's become available lately performs as well or better and is a fraction of the cost..... __________________ '85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD

05-19-2011, 11:30 PM	#30
C-10 simplex Account Suspended Join Date: Dec 2008 Location: indisclosed Posts: 1,515	Re: Where does the LS engine get it's efficiency from? 1) Speaking on a related subject to the arias heads, the other thing that blows me away is that the lsx block can take 1500+Hp per gm and maybe 2000HP or more for only $2000! i've been a fan of the original chevy small block since i've known about them, but the more i read about the ls i would have to say it is superior to the small block. Even the stock ls blocks can take a good amount of power. 2) Back to the subject of efficiency and forged parts: Would using forged rotating parts---crank, rods pistons have any effect on durability/longevity for a daily driven street (and occasional strip) engine?



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