so i found my machine shop (after being recommended heavily to them) for my supra! 
so im gunna start getting price quotes here soon for my build (felt like doing the NA/T build for fun) and i was checking out their website an they offer something called a engine block o-ring? (explanation below)
Block o-ring:
Your engine will make power by developing cylinder pressure. It is this pressure that "pushes" the piston and spins the crankshaft. When you start to develop excess cylinder pressure (Blower, Turbo, or Nitrous) you will put excess stress on the head gasket. This often results in a blown headgasket. Although not the end of the world, nobody likes to have to tear down the motor to install new headgaskets! By machining a round groove around the cylinder bore and inserting a special wire you will create a stronger barrier for the cylinder pressure and head gasket life will be greatly improved. You will see that many people will put the o-ring in the head rather than the block, this is typically because the head can be o-ringed without removing the block. The fact is the head is more likely to warp in the future and require re-machining of this groove and will not result in as strong a seal. Although it may be tempting it is not recommended to run both! The problem is a small amount of movement in the head when it is bolted to the engine will result in the wire circles not lining up perfectly. This will result in a worse seal than if no o-ring had been installed at all!
anyone heard of this before?? seems interesting and worth investing in but would any of you consider it?
http://www.dgmotors.biz/default.htm this is their website
so im gunna start getting price quotes here soon for my build (felt like doing the NA/T build for fun) and i was checking out their website an they offer something called a engine block o-ring? (explanation below)Block o-ring:
Your engine will make power by developing cylinder pressure. It is this pressure that "pushes" the piston and spins the crankshaft. When you start to develop excess cylinder pressure (Blower, Turbo, or Nitrous) you will put excess stress on the head gasket. This often results in a blown headgasket. Although not the end of the world, nobody likes to have to tear down the motor to install new headgaskets! By machining a round groove around the cylinder bore and inserting a special wire you will create a stronger barrier for the cylinder pressure and head gasket life will be greatly improved. You will see that many people will put the o-ring in the head rather than the block, this is typically because the head can be o-ringed without removing the block. The fact is the head is more likely to warp in the future and require re-machining of this groove and will not result in as strong a seal. Although it may be tempting it is not recommended to run both! The problem is a small amount of movement in the head when it is bolted to the engine will result in the wire circles not lining up perfectly. This will result in a worse seal than if no o-ring had been installed at all!
anyone heard of this before?? seems interesting and worth investing in but would any of you consider it?
http://www.dgmotors.biz/default.htm this is their website
