[nates6969]

non taken however I have fully researched this gig and I do realize pressure (amount of force exerted over a unit of area) is not the same as air flow (a measured amount of volume per unit time). Im currently a mechanical engineering student and understand the concepts of fluid flow and pressure. When I posted about the cams, my concern is its going to allow TOO much flow causing an increasing volume of air in the cylinders. With this added volume, the air will become harder to compress, increasing the final compression before combustion to higher levels. Therefore if I continue to run a 10 psi intake track pressure, this pressure will remain constant however more air will be, in theory, entering the cylinders. This increased air volume mixed with a higher piston compression ratio will skyrocket the final compression creating a extremely large force when ignited. Im concerned this will ignite unevenly causing extreme engine detonation. However I believe when matched with the proper amounts of fuel and ignition timing, the pistons should be able to withstand the increased combustion pressures. Secondly I rebuilt the bottom end, decked the head, seated all the valves (plus 8 new exhaust valves), 30k miles ago. When it was rebuilt I threw a new felpro head gasket on it. not the best gasket but I have seen turbo cars run 30 pounds on these (final compression pressure at 10-15psi on 9:1CR is not even close to 30psi on 7:81CR pistons). The only reason I ask these questions is to find out more about the internals of the NT, its not like I have taken a NT piston and performed structural analysis on it and compared it to a turbo piston. I am only seeking answers to practical examples others may have already performed. If I didnt feel confident in what I am doing I would have just thrown a 4g63t in it a long time ago. I just want to see what these motors can handle before the grenade. Worse comes to worse it, I blow a piston and I drop in a turbo block while reusing all aftermarket supporting mods. Too many people on these forums think these motors can only handle 8psi, no offence, I believe this is definitely true when not tuned correctly. When I first did the swap I had no tuning (only stock turbo ECU) and was making knock at 8psi. Currently I have tuned the car for 12 with 0 knock and is running strong since.