Pictures, details on 408 LS6
#1
12-03-2005, 10:46 AM
Pictures, details on 408 LS6
Here is a picture of the iron-block 408 LS6 in my Camaro,the dyno sheet is shown in the "what Would Win thread in Street/Strip, elsewhere (sorry, it seems hard to read): 701 ft lbs and 698 Hp at the rear wheels using a 150 shot of nitrous (engine does 540,540 N/A on race gas, 522, 525 on pump gas). The car is not much to look at itself, just a black 98 Camaro with a ram air hood that fits okay, ZO6 wheels, roll cage, and 4" dual dual exhausts. Streetable (sort of) and do in the high 9s with slicks and some luck.
Sorry guys, I tried four times and it kept telling me it downloaded but I don't see the picture. I'll try again later.
Sorry guys, I tried four times and it kept telling me it downloaded but I don't see the picture. I'll try again later.
#3
12-03-2005, 11:44 PM
RE: Pictures, details on 408 LS6
This is the modern LS-6, but iron block.
The block castings used in the 6-liter truck engines in the Silverado and Escalade are iron, but otherwise IDENTICAL to the aluminum block LS-6 except it has a 4" instead of 3.9xxwhatever bore Ii.e., they are exactly the same as an LS-2: you can take the heads, water pump, manifolds, oil pump, gaskets and fittings from an LS-6 and put them on this block. Thus, when you are going fro really high power outputs with an LS-6, the trick is to replace your aluminum block with a case iron Silverado block. Our block was a new block, bought by Horsepower Engineering, which bought it from GMN, bored it, and built the whole short block for us.
It weighs about 89 lbs more than aluminum, but it is much stronger around the bearings and in the cam valley webs. You can also bore it 30 or even 40 over to gain a few cubes (a 30 over version gives you 408 cubic inches. It was SO tempting to go for .33 over to get 409 cubes so we could use NOS fender badges from a 1963 409 SuperSport -- that's the type of thing I really like -- but the custom sized pistons would have blown our budget).
Our 408 is heavy: cast iron block, Eagle rotating assembly which is pretty heavy compared to many, but its gets the job done and we expect it to last for a long time even though we abuse the ****ens out of it.
The block castings used in the 6-liter truck engines in the Silverado and Escalade are iron, but otherwise IDENTICAL to the aluminum block LS-6 except it has a 4" instead of 3.9xxwhatever bore Ii.e., they are exactly the same as an LS-2: you can take the heads, water pump, manifolds, oil pump, gaskets and fittings from an LS-6 and put them on this block. Thus, when you are going fro really high power outputs with an LS-6, the trick is to replace your aluminum block with a case iron Silverado block. Our block was a new block, bought by Horsepower Engineering, which bought it from GMN, bored it, and built the whole short block for us.
It weighs about 89 lbs more than aluminum, but it is much stronger around the bearings and in the cam valley webs. You can also bore it 30 or even 40 over to gain a few cubes (a 30 over version gives you 408 cubic inches. It was SO tempting to go for .33 over to get 409 cubes so we could use NOS fender badges from a 1963 409 SuperSport -- that's the type of thing I really like -- but the custom sized pistons would have blown our budget).
Our 408 is heavy: cast iron block, Eagle rotating assembly which is pretty heavy compared to many, but its gets the job done and we expect it to last for a long time even though we abuse the ****ens out of it.
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