Quote:
Originally posted by Cathar
Jet needs some distance from the base-plate to work properly, otherwise the flow doesn't gets all mashed because you're trying to force too much flow without enough of an "outlet". How close was your barb to the base?
I would not recommend getting closer than 4mm for most any setup/nozzle configuration, and depending on how large your nozzle is, you may see better results being a little further away (say up to 8mm).
I'm no expert on this, but from everything I've read the distance of the nozzle from the base-plate can have a dramatic effect, and it's not simply a case of closer is better.
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Yes to close and it effects the flow as it hits the base. To far can be worse also but not as worse as being to close.
This time it was 2mm away. 1mm away was to close. Obviously 2 mm is to close also. From the baseplate to the bottom surface of the top plate is only 4mm. So I can't go no higher than that. I might if I thread the inside of the barb higher up. I think your right though. It looks like 4mm is where it needs to be. The distance does play a big role. I also found if your channel your water pools in is to deep then it will counter effect the impingement.
My previous block performs well at 2mm. Further away is worse, atleast at 7mm anyways. The channels are almost 7mm deep so I think it's because of the extra water around the impingement circulating back into it. The reason why I used the large cap to fill the space. With out it, it wouldn't perform good no matter if it was at 2mm or 7mm distance. I didn't try anything inbetween at the time because it was a pain to do but I got a easy way of testing distance now - A barb threaded on the inside. I seen no change between the multi-jet and the single jet.
I also wonder if I got the center inlet right. Looks to be directly over the die after looking at the impression on the bottom of the block. Then mounting and remounting the block can be an issue. I'm limited to .5C accuracy too. I'll give 4mm a try when I get the time and see what happens. Just a matter of screwing the nozzle further into the barb. The new inside threaded barb makes it easy.
I can say both blocks perform worse without impingement.
My post are to long. <- my new sig.