I'd be pretty bummed about those numbers too. See sig.. 14#s, 94 pump.. Extremely safe tune. I mean dynos can vary, etc.. but that seems pretty low to me.
The hellion kits use the stock manifolds. Could that be why it reads low?
They would make almost identical power, the only thing that would change is spool time assuming that the turbine can move the air required. If back pressure becomes an issue then yes the power output changes but as I said holding ALL things the same changing the inducer size will not create MORE power at the EXACT same airflow. Any additional air gathered by the larger inducer would be bled off by the wastegate (thus why 17 lbs is 17 lbs regardless of if you had twin 76mm turbos). The ONLY advantage in his turbo's over say GT35r's is that they are more efficient and that does translate to increased response and ability to flow MORE air overall.
Imagine this, a straw, you blow through an end with x amount of air, there is no resistance the straw is able to support all x amount of air. You grab a bigger straw and blow the same x amount of air, the air is still able to be supported by the straw and the end result on the other end is the same amount of air. If I blow Y amount of air and it happens to be more than the straw can support THEN a larger straw would be able to support MORE air. Up to that point the larger straw is of no advantage.
By your theory everyone should run 88mm pro mods on their stock long block cars because they would make the most power at 17 lbs of boost.
I have to correct you. Assuming all parameters are the same besides turbos the larger turbo will always make more power even with the same boost levels. The reason being volume or cfm and that's why a larger turbo makes more power. If your reasoning was true noone would need to do any turbo upgrades or even convert over from a supercharger because your saying 10lbs is 10lbs as long as everything else is the same.
This will explain more.
http://www.rx7club.com/3rd-gen-archives-73/why-bigger-turbos-make-more-hp-same-psi-645551/
I don't think you understand the basics of volumetric efficiency. VE has to do with more air being in the charge and the motor being able to move that air. The size of the turbine does not factor in to the amount of air in the cylinder until the turbine has been maxed out. Those "80mm 2.0 Honda's" still use compressor maps, those are insanely high revving high compression cars that use their compressor maps albiet at a higher point in the RPM and require that much air to be moved. People do not put MASSIVE turbo's on cars expecting them to get more poor. A properly sized turbo will be more efficient and have no change in charge temp between it and a turbo significantly larger. At the EXACT same air flow, a proper turbo will make the same power but with a better power band than a turbo that is larger. That is my point and in your post you've simply argued an undersized turbo will be out performed by a big turbo, to which I say... Duh.
Turbine size DOES factor before AND after its maxxed.Change the turbine housing to a bigger one in ANY turbo engine and theres a 99.9 percent change there will be an increase in power without ANY other changes,why? Less restriction,better VE.bigger hotside on a turbo helps move that air,maxxed or not.
20 lbs/min from a smaller charger at 100 degrees DOES NOT produce the same amount of power as 20 lbs/min from a bigger charger running cooler at 90 degrees.engine receive the air colder,and spits it out easier,same amount of air.smaller charger has to work harder to move the same air,needs to compress more which causes hotter air.Its simple.Easy money.
You clearly don't understand the first thing of VE or how an engine/turbo works. Go hang twin 76mm's on a 4.6 then an 80mm. Tell me at 3k if the twins will out perform the 80? It won't. If you are implying the engine can handle UNLIMITED rpm then you would be correct as the 80mm would then run out of the ability to push the air required through the engine. Under the curve where the engine makes power an 80mm will wipe the floor with twin 76's and make more power through the usable power band. A motor is a restriction, shoving more air into a restriction does not result into more air coming out the other side. If your motor was never a restriction then you would be correct but this is real life.Were not talking about anything you just said.were talking more power.switch your turbine from 84mm to a BIGGER 86mm,nothing on the compressor side changed.tell me,why wont this make more power? Backpressure is going to be lower.it doesnt matter if your at 3k rpm or 7k.it will help VE.bigger makes more power.theres alot of threads on this topic and they all come back to the same answer