The last five of the 1.5" bodies were snatched up quick. The 3" body version is still without the cap/sprayer assembly and won't be shipped for at least another week. My factory is still dark due to coronavirus. I have since mocked up the 3" body on my kettle, which doesn't really NEED any more cooling power than the 1.5" body could deliver, but I wanted to see the cooling effect at least with the 6GPH sprayer installed. The effluent temp basically dropped by about 20F with the larger body. That tells me, at least with this limited testing, that you can push a little more power in to achieve a slight increase in boil off or you can possibly get away with a smaller sprayer for the same boil intensity/volume. Overall it is an increase in performance but i'll have to do much more testing to figure out if the increase in cost is worth it.
Lastly, I also bushed the 1.5" TC port between the kettle and slayer down to camlock diameter and noticed a 10F drop in effluent temps which means less steam getting through. In the end it drives your power input max and boil off lower than if the port was larger. How much that fact matters is up to you. I was able to boil 7 gallons at 25% power (this was somewhere between a simmer and boil) without steam leakage at the lid. I ran it up to 35% and did see some steam escape and the boil intensity was a bit much. Contrast that to the 1.5" port which take enough heat away to leave the boil at 35% with no steam escape and a relative normal boil intensity.
This whole thing is quite the delicate balance of heat input and output.
Lastly, I also bushed the 1.5" TC port between the kettle and slayer down to camlock diameter and noticed a 10F drop in effluent temps which means less steam getting through. In the end it drives your power input max and boil off lower than if the port was larger. How much that fact matters is up to you. I was able to boil 7 gallons at 25% power (this was somewhere between a simmer and boil) without steam leakage at the lid. I ran it up to 35% and did see some steam escape and the boil intensity was a bit much. Contrast that to the 1.5" port which take enough heat away to leave the boil at 35% with no steam escape and a relative normal boil intensity.
This whole thing is quite the delicate balance of heat input and output.