Is this true or what
here is the qoute from the head engineer who designed the ls1 "The LS6 and the LS1 use an all-aluminum cylinder case. It’s a "deep-skirted" design (block structure extends below the crankshaft centerline) with six-bolt main bearing caps (four vertical bolts and two horizontal bolts per cap) and head bolt threads deep in the main bearing bulkheads (for minimal block distortion and maximum head gasket clamping force). LS1/6 blocks are semi-permanent mold castings of 319-T5 aluminum. The LS6 case is different from LS1 blocks in the design and strength of the main bearing bulkheads. As the pistons move up and down, they force air in and out of the spaces (or "bays") beneath them. At high rpm, this reciprocating air flow is violent and really whips up the oil. While the LS1 block has some machined openings between bays, the LS6 block, because the engine has about 500 more usable rpm, needed larger windows at the base of each cylinder to better accommodate "bay-to-bay breathing." Click for Larger View We got the GMPT guys to cut up a LS6 block for us. To above-left of the #2 main bearing bulkhead, at the bottom of the cylinder bore, you can easily see the rectangular bay-to-bay breathing window. Photo: author Click Image For Larger View Obviously, cutting windows at the bottom of each cylinder reduces the strength of the block’s key structural area, the main bearing bulkheads. With 40 more horsepower, 400-500 more rpm and even more powerful derivations of this engine to come, the block needed to be even stronger than it would be without the windows. It doesn’t take a rocket scientist to figure, in their ruthless pursuit of power, Dr. John and his engineers had to do more than simply reprogram their CNCs to cut those windows. Finite element design work along with a lot of thrashing engines to death (in a few cases, literally) on the dyno eventually resulted in the special LS6 block having both the bay-to-bay breathing windows and more overall strength than the LS1 block
TRUE OR FALSE?
The full potential of the LS6 block will not be realized with the LS1 internals. The block is not going to add 15-20 HP or maybe even anything.
Why does GM do anything? Usually for monetary reasons. Cheaper to make one block, than two or they were running low on LS1 blocks.
Many late model LS1 got the LS6 intake manifold, as well.
I don't think the guy with the car for sale is going to get that price for it. It's not old enough, yet.
Why does GM do anything? Usually for monetary reasons. Cheaper to make one block, than two or they were running low on LS1 blocks.
Originally Posted by another thread
A casting # 12561168 denotes LS6 block. The number is located on driver's side, at back of left hand deck above transmission flange.
I don't think the guy with the car for sale is going to get that price for it. It's not old enough, yet.
There was an article done on this in GMHTP magazine. I can't remember off the top of my head though if his figures were right about the rarity of the LS6 block.
As far as I know (and I could definatly be wrong on this one), the LS6 block was a little stronger, but should'nt really put out the additional ponies he's claiming it does.
It is a nice car, but honestly IMO, its not worth even close to what he is asking. So he garaged it for all that time and got ripped off on the $150 a month bill. He shouldn't be tagging that on to the price of the car. It might be worth that money if it remains like it is in perhaps another 10-20 years, but not now.
As far as I know (and I could definatly be wrong on this one), the LS6 block was a little stronger, but should'nt really put out the additional ponies he's claiming it does.
It is a nice car, but honestly IMO, its not worth even close to what he is asking. So he garaged it for all that time and got ripped off on the $150 a month bill. He shouldn't be tagging that on to the price of the car. It might be worth that money if it remains like it is in perhaps another 10-20 years, but not now.
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