How much does it weigh?

[jfaria78]

My dad and I have and weighed a keith black aluminum block with sleeves, studs and all and it did not weigh much less than the cast iron one. I thought it was only about 50-60 pounds. It cost about 7500 so, for the money I did not think it was worth it.

keith Black on his stage 1 & 2 blocks made them the same thickness as the orginal cast block and they broke fairly easily. (I have heard the same about the old ZL1 block) When the stage 3 blocks came out they were about twice as think but the weight savings was not as much. Now this was all for nitro so on a car that is not supercharged it may not matter. If you look at the aluminum blocks of today they are much stronger then even the cast iron blocks so I do not think there will be a significant weight savings, but there will be a significant strength improvement.

Both guys in Nostaglia Top Fuel that run a BBC (Arnold Birky & Brendon Murray) both ran cast blocks at one point and went to aluminum one becuase the block did not move around as much. Cylinder head clamping force is significantly improved having the extra 4 head bolts in the block (I think dart now makes a cast iron version of that block)

Hot Rod Magazine did a write up awhile ago about how much you could save going to a aluminum heads over cast iron ones and I thought it said the pair of aluminum heads were equal to the one cast iron head.

My car with a full interior BBC w/aluminum heads, intake, ps pump (c6 model), water pump, pulleys, etc. weighs 3410 with about 3/4 of a tank of gas.

Try looking up a drag race forum, I am sure they will have the exact weights down to the ounce.