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Message: [QUOTE="NorcalOBS, post: 966530, member: 14612"] Well I have been busy lately but I have nailed down a few things. I figured out I was looking at the metric scale on the bottom(where the lbs/min usually is) of the flow map. The hx40 compressor is too small. It is pretty much on par with the stock tp38. So I have been lookin into three options. 1. High Tech Turbo mods the he351ve turbos to a 64mm compressor and changes the turbine wheel to a less restrictive one. I still haven't found the time to call them and inquire about how well this modded version flows and cost when sending them a working core. 2. I am trying to search around the web for a good deal on a he451v which I think would be sized just right. They are not as easy to come. 3. I am also trying to find out if the v-bands on the chra are the same size as any other holset models with v-bands to hold the compressor to the chra. The h2e compressor and the hx52 both have compressor sizes that would be better matched to the 7.3 but I cannot imagine that it could be that easy to make a hybrid. Specs on individual parts for these holsets like the compressor back plates and etc are no where on the web from what I can find. I am still trying to check into this as I saw a lot of hx30/40 hybrids on gas car forums when researching the 351. I am going to get some sort of holset vgt on this thing and if for any reason it doesn't run how I want it should be a easy swap to a stock h2e which would be right for my setup. I just love the way the stock turbo lights off with these injectors so I really want to see if I can pull this off and get a high flowing/cooler running turbo that spools as good or better. [/QUOTE]