Nothing like a good head...

[digger]

What’s the minCSA?

[lc-gtr-1969]

What’s the minCSA?

From memory (I would need to check my measurements at home in my little record book) it was about 1.65/1.68 inch2.

[Momus]

You done good, that is a damn fine street engine!

There is a mob in enzed working on billet alloy blocks that'll go 250+ cubes.

Cheers Tony...

Those billet blocks look outstanding... They are long over-due... I'd love a 250ci red motor with JZED and 55mm webers on e85. I think with the right R&D someone like you could get close to 500hp out of one N/A. Costly exercise but so cool...

That would be a long stroke type of deal or solid if big bore?

[lc-gtr-1969]

I believe the billot blocks have increased bore size (like .200 over through better wall thickness) and increased stroke. Not sure of exact specs but it's not just a longer stroke setup...

[digger]

What’s the minCSA?

From memory (I would need to check my measurements at home in my little record book) it was about 1.65/1.68 inch2.

that seems fairly small for a 1.90 valve? is it an amount of material thing?

[lc-gtr-1969]

I think I mixed up the throat diameter from the CSA, the throat diameter was about 1.68 (again from memory)... I have it all written down at home just haven had a chance to pull out my records. It was 12 months ago that I did all the specs on the head.

[bob460]

I believe the billot blocks have increased bore size (like .200 over through better wall thickness) and increased stroke. Not sure of exact specs but it's not just a longer stroke setup...

Did you see the latest street machine mag, paige 110 pink lj custom billet block 237ci, j.zed 12-port head, 55m triple webbers, 11.1 comp, 260/270 .650 lift solid roller............made 422hp at rear wheels

[lc-gtr-1969]

Yes I did, what an awesome setup... I mentioned earlier that I reckon a JZED head on a billet block close to 250ci could go close to 500hp, looks like those NZ boys have close to cracked it...

[shoedoos]