Inliners International Forums General Discussion Hi Performance 292 cross flow head mock up

I have seen billet water blocks made in sections.

They also have wet sleeves in them and have water flow around them. That's how the 4 cylinder blocks were done. Kinda' like how a diesel is. Removable liners that interlock in the deck. But most billet blocks I've seen are solid and intended for short duration racing and for use with Methanol or Nitro as a fuel.
The IGOR block and other components were a true one off, and there really wasn't any other way to make them for it's intended purpose.
That makes a cast block more advantageous because, while many things can be made billet, I do it professionally for a living everyday, many things just aren't practical to be made that way.

here are the flow numbers on my head. 340 CFM I / 220 CFM E according to Leo.

That's looking sweet!

Is that someone else's shop? Looks like a Precision Matthews lathe.

Interesting - a ported 4200 head with 1mm OS valves will flow that also....

Glad you started this and hope it is still progressing. An awesome look at what it 'really' takes to put this together.

I was looking at an LS head cut/weld, it even has 4 bolts per cylinder like the 292. Then I laid the LS gasket on the block and everything looked good.... except one row of bots were outside the solid area of the block.
The bolt lay out of the originals does not really suite cross flow heads. The SBC head conversion sort of works around it, but the passenger side of the block simply does not have enough room for pushrods and free flowing ports. The canted push rods on your set up give some guidance on how to get around it.

I've given some thought to OHC conversion, it would not be particularly difficult on the block side, but as noted a totally new cross flow head based on LS ports with repositioned bolts would be needed to take advantage of it.

But keep on going!