Update
So update: I broke in the LRP ZR.30 yesterday. I am NOT impressed. That thing so far is a POS. I think the .28 has twice the balls. It either runs stupid hot or bogged down rich. Almost acts like it has an air leak. I am going to tear it down and re-seal it and see what happens and also put in the higher stall clutch springs while I am at it. But as of now I have hated it, very disappointed. Nothing like the two LRP .28s I have. I had to richen the thing to keep the temps DOWN for break-in even though it was stupid rich already. I wonder if the JP-4 pipe is too restrictive? I have heard it may be for that engine, I have seen pipes make an engine run hot. Same thing happened on my Picco .26 in the T-Maxx. Ran hot and like poo until I changed the pipe. I may have to see if I can find a JP-3 to put on it for try out. It is supposed to be a bit less restrictive than the JP4. I am going to put a Savage THS on it for now to see if it changes aything. Then I am going to put the LRP .28 back on there and see how it runs as a comparison. I don’t know, I'm kinda grumpy about it.