Anyone out there have one they are making big power with? Looking at a 59*, non siamese setup. I know it's basically a r3 block with the extra head bolts milled off, but just was curious if anyone is making 1000-1200hp with one of these blocks?

Fill it.

Out of the the question. Street car.

Mine spends WAY MORE time in the street then it does the track, and mine is filled.

I never even needed an oil cooler until I put the diaper on the car. Now it's got a small oil cooler and runs 180-200 everywhere.

I'd rather not fill it, I don't think anyone fills r3 blocks at that kind of power.

I have run a mostly filled stock block on the street just fine, if you were to go that route, run a big oil cooler. Mine was filled to the water pump holes. Is it a power adder deal of some sort?

-Kenny

I have been running a filled R3 on the street for years. It has completed 7 Drag weeks and 3 class wins, every time I take it apart my machinist ark's me why is this thing apart, it looks great.

What are you using to fill it?

Moroso engine block filler. As mentioned, an oil cooler is a good idea if you use a lot of filler. Mine is filled to the bottom of the water pump holes. Seen oil temp as high as 212, but synthetic is often good to over 250 - per Royal Purple tech people. Still, a cooler is not a bad idea if you do a lot of street driving.

Hard Blok, filled approximately half way up, also use an oil cooler with a oil temp gage close to the oil pickup. Oil temp and water temp run within 10 deg of each other.