BritishV8 Forum

Here's a pic from the HardBlok site:



I don't think we would have to fill the block this high. What I'm trying to wrap my mind around is how it helps cooling? Does it keep the coolant moving faster? Anybody ever done this?

I think it's approx. 15^ atdc of crank rot. for major heat/pressure? What "HardBlok" say about thermal factor? I thinkin, same pump= increased velocity, but reduced volume through rad. Anybody a thermal dynamics engineer out there? roverman.

I suppose after putting concrete in the block it's gonna get heavier. I wonder how much?

Block fill helps rigidity of the block. It doesnt help with cooling.. Depending on engine design you might actually need an oil cooler even after a partial "street" fill.. IE.. BB Chevys have an oil passage that gets entoumed when you blockfill.. The coolant in my 406 SBC ran real cool with  a partial block fill.. The oil got real hot real fast.

Nic, "The needs of the many,(inches),outweigh the needs of the few,(lbs)" .Spock

Yeah. I guess I didn't phrase my question about the "help" cooling. I was wondering how it doesn't hurt it. The oil temp makes sense.

On this note, in regard to the deck plate thread too, how well does the block filler seal the water jacket? Let's say the bottom of my T6 tube welded to the deck plate plan was not welded to the bottom of the water jacket, would the filler seal the block? I mean concrete does leak through cracks. Would this do it too?

Nic, I've used Hardblock, in the past and it was consistancy of "grout". Why would you, not weld bottom of alum. liner? Seems to me, flanged and shrunk-fit into alum. deck plate, through the plate, with alum. liner welded to block at bottom, possibly welded on top. Is this not a stronger way? I always thought, concrete contained gravel ? I wouldn't fixate too much about additional weight, maybe they use Lava for gravel?  LOL.  roverman.

I'm totally with you on the welded all around. Just fleshing it out. The only reason would be if I literally couldn't get the torch into the bore or through the space of the crankcase. Totally possible. What if I don't get a complete penetrating weld?

May want to consider a, straight or bendable torch head. "If" you preheat adequately and have enough heat/correct angle on torch head, should be adequate. Helium is the hottest/cleanest gas for alum. and you can run "DC"., produces more heat, your current isn't "reversing" half of the time. Boeing Aircraft pioneered this method ,for tig. welding alum., decades ago. I suspect if you run at lest 2" of block filler, should not be an issue. roverman.