John Hinkley just posted some pics of the new LS7 engine package for the new ZO6 over at Vetteheads: http://www.vetteheads.com/forums/showthread.php?t=3990This engine is going to be one bad puppy. I hope this is available soon in crate engine form, since it would be the perfect engine for the new 65 project car!
I am optimistic that the LS7 may be priced well when it finally comes out.
The LS2 is already available, and is $1500 cheaper than the LS6 engine.
With any luck, the LS7 will only be a few hundred more than the LS2!
I am not sure why anyone would buy a LS6, when you can get a LS2 with the same HP for less money.
I have not heard the final HP numbers yet, but all the numbers That I have heard thrown around were 500 or greater. This will make a great engine for a retro rod like mine or yours!
It is funny that GM calls the LS7 a small block. It is 7.0L or 427 cu.in., which in the old days was a big block. I know it is not cu.in. but the physical size of the block that determines it, but it is funny.
It is funny that GM calls the LS7 a small block. It is 7.0L or 427 cu.in., which in the old days was a big block. I know it is not cu.in. but the physical size of the block that determines it, but it is funny.
From what I understand, the newer hyperutectic cast pistons are just about as strong without the large dimensional changes associated with forged pistons.
These engines already have a reputation for piston slap when cold, and I would guess that forged pistons would equate to many more warranty visits to the dealers.
From what I understand, the newer hyperutectic cast pistons are just about as strong without the large dimensional changes associated with forged pistons.
These engines already have a reputation for piston slap when cold, and I would guess that forged pistons would equate to many more warranty visits to the dealers.
they now have forged pistons with proper shape with little piston to wall clearance. some of the JE piston are under .003 in a 4.00 bore. i built several 4 cylinder cavalier racing engines using JE forged piston and they were set at .0015 with a 3.500 bore. they told me at JE that GM bought them a $500,000 CNC special machine to do the piston for the GM vortex marine engines and because of the shape this machine could cut the piston they needed very little piston to wall clearance.
It is funny that GM calls the LS7 a small block. It is 7.0L or 427 cu.in., which in the old days was a big block. I know it is not cu.in. but the physical size of the block that determines it, but it is funny.
I share your thoughts on the "mis"use of option codes by Chevy.
I realize that marketing comes into play here, but I'd have preferred a LS-6 and LS-7 to have always meant 454. Surely there are enough letters in the alphabet for everyone.
Next, they'll be marketing a small block L-88. :eyerole Never turn down a chance to hitch your wagon to a star.
I had no idea that forged pistons had progressed that far. The last set of forged pistons that I used, made the engine rattle like a cement mixer for the first 3 minutes it ran! :L
The sodium in the stem transfers the heat more efficiently from the head of the valve to the length of the stem, where it can be transferred through the valve guide to the cylinder head and water jackets.
since the sodium is lighter than stainless steel that it replaces the valve is lighter. the intakes can just be hollow stemmed without the sodium because they do not have as much heat to transfer. ford 427 hi performance engines back in the 60s used sodium filled exhaust valves. this is a way to get a lighter valve without going to expensive and high maintance titanium
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