[Cathar]

Originally Posted by Blackeagle

59 vs 35 jets but appear to be smaller jets in near the same area (deeper cups as well?).

35 vs 59 jets in the same area, yes. I do have a G6 design plans in hand with 89 jets, but it's really pushing what can be done with a basic CNC in the metal, and I need to talk to the machinists about if it can be made. The G6 would only ever be a one-off, much like the Cascade XXX was.

The jetted area is around 1.5x larger on the Storm design than on the Cascade. It's a rough 7/8" diameter circle effect, and the geometric level just adjusts the size of the cups to fit into that same sort of area.

Cup depth is not something I'm willing to discuss.

Isn't this 59 cup design even more cups than the SS Cascade had?

Cascade(/SS) had 52 cups in 2/3's the area of the storm design. On a cup density basis the Cascade is significantly more dense than even the Storm/G5.

G5 also shows a slight step in the cup walls, to reduce pressure drop at a point where most/all heat has been removed?

I see what you're talking about in the pictures, but it's just a lighting illusion. There's a lot more clearance between the cups and tube walls than there was with the Cascade, also as a result of going to the round tubes, and so it wasn't necessary to contour the walls to facilitate water discharge.

Can you share any data yet regarding the G5's differances in jet velocity & flow rates?

Jet velocity per flow rate is almost identical. G5 has a very marginally higher pressure drop in comparison to the G4. Would typically expect around 5% lower flow rates when using a G5 over a G4. This is a natural result of shrinking the jets even smaller and the pressure drop increase to force the water into the smaller jets.

I recall you posting regarding a estimated temp differance of .8C, was this confirmed in testing?

Across repeated mounts 0.8C is the least difference I have seen between the G4 and the G5 (best mount of G4 vs worst mount of G5). I have seen a significantly larger differences than that in my testing, but I'm keen to get the block reviewed by Phaestus to confirm. Phaestus does normally see around half the temp delta differences I see due to the nature of our respective testbeds and heatloads. Despite my pleasure with the results I have avoided making a fuss about them because they are unexpectedly good, and I'm wondering if I've done something wrong (even though I have been able to reproduce many times). This has also thrown a total spanner into anything I've ever written about being able to predict what the design is doing, and leaves me more open to getting the G6 made up, even if only to explore the temp differences at that level.