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Message: [QUOTE="TARM, post: 1426642, member: 578"] My point was that for 3.7 PW it almost has to be lower rpms for the mechanical window. But if it was a lower ICP that would explain it. That was just me trying to workout what was going in with the tune. But again back to my original point which is what a 38R can clean up. There is no way a 38R is cleaning up almost 300 cc of fuel which is about where it would be at a high ICP of 2800-3000 psi. You can look back to old posted flow charts from Nate for 200% hybrids here. These are just his average hybrids flow rates with no "super secrete squirrel" mods. [IMG]http://www.powerstrokenation.com/photopost/data/500/medium/400x200_Unlimited_Diesel1.JPG[/IMG] Even if his injectors are slower that even this which if so its likely not by too much in what world is a 38R going to clean up between 346-385 cc of fuel that is with a spread of 2500-3000icp? That is if his injectors have over 300cc of capacity. If not then the tune is bottoming out the plunger running them way past empty which is not good for the injectors regardless. My point is no matter what 3.7ms of PW with a 200% nozzle and a 38R is too much fuel unless we are talking much lower ICP but even @ 1000 icp 3.7 ms would be dumping 230cc which is almost emptying a standard 238cc hybrid. IMO you should never see 3.7ms of PW in any driving tune on a decent flowing 200% hybrids. Down low it would beatup the bottom end and up top there is not the mechanical window to use it. I need to find the chart I had made up that shows the mechanical window in PW MS time in relation to the engine RPM. I think it was posted on one of the two forums at some time if someone has it. I know Jason Nate Charles and others know it as its been discussed many times in years past. But looking at this chart please explain where in a tune with a 200% or larger nozzle would you use a PW of 3.7ms? [/QUOTE]