SACair Forum

[quote="neouser"]Go for it. I would just suggest that you make sure you keep it under 400 fps, regardless of the spring you choose, as that is the limit on most fields.[/quote]

[quote="neouser"]Go for it. I would just suggest that you make sure you keep it under 400 fps, regardless of the spring you choose, as that is the limit on most fields.[/quote]Yeah, I want more distance, but I don't want it to be too hot... I'll make sure it's lower than 400 fps. :)

Just upgraded a G36c.

Yeah well I'm not looking into buying a G36C at the moment, lol.

i think that tightbore is giving your 36 more FPS.

[quote="Bordicon"]i think that tightbore is giving your 36 more FPS.

pending argument coming up ...

i will note that i did not verify my hypothsis heheheh

[quote="Bordicon"]i will note that i did not verify my hypothsis heheheh

alright got some time off from doing work.

PV=nRT?

for air, only in low pressures and high temperatures.

[quote="Bordicon"]PV=nRT?

yeah, compress flow is way over my head.

[quote="Mr.Reyes"]also air is incompressible at subsonic speeds. after that it is considered compressible flow and density of the fluid/gas changes along with the temperature and i have no idea what happens beyond that. however, i do know that sometimes you can get a negative thrust ( meaning that the compressibility will work against you) although, im not willing to read it right now.[/quote]

[quote="neouser"][quote="Mr.Reyes"]also air is incompressible at subsonic speeds. after that it is considered compressible flow and density of the fluid/gas changes along with the temperature and i have no idea what happens beyond that. however, i do know that sometimes you can get a negative thrust ( meaning that the compressibility will work against you) although, im not willing to read it right now.[/quote]

Was thinking about it some more. Piston velocity is directly related to airflow, right? If it weren't, stiffer springs wouldn't produce higher fps. However, at some point, the air displaced by the piston exceeds the amount of flow the cylinder head nozzle supports. When that happens, there would be some compression involved. We can always go back to automotive theory to explain this phenomenon. If the engine is moving more airflow than the inlet (throttle body and intake) will allow, a vacuum exists in the manifold. If an engine is supercharged and the volume of air being displaced by the supercharger exceeds that of engine airflow, you have positive pressure, aka compression, in the manifold.

One thing about engines Kev

[quote="Ray"]One thing about engines Kev

[quote="Ray"]One thing about engines Kev

Dude...Your guys should compare AEG gear box (piston & cylinder) work with 2 stroke (in & out) engine....Not 4 stroke.

[quote="neouser"]Yep. Engine manifolds are stoich at wide open throttle, aren't they? I don't even think you need high rpm to get that. You can have atmorspheric pressure at any rpm provided that the air supply is unrestricted. At high rpm, with a properly designed intake, you can achieve positive pressure with ram air induction...[/quote]

so it comes down to the spring force and those forces that work against the spring. creating a better seal and crap like that doesnt hurt either.

Soooo...should I go with an m120 (or 100), a pdi150%, or a SP110??

If you get a tight bore, an m120 will put you way over 400fps. M120 will get you about 410fps when its new. I would go with an m110 or m100 depending on how much tight bore increase the fps.

go with the sp110, m110, 150% at first I was like give me the max now 110 is just as good if not better in many ways. Easier on the gearbox, less spring noise so the thump of the piston can be heard better. There's also less of that whiny sound at full auto. And most of all there's a neglible if any difference in range and accuracy.

There's a Systema M110??!?!!?! WHY WASN'T I TOLD THIS?! :shock:

here's a short spring equivalency table

[quote="freq88"]go with the sp110, m110, 150% at first I was like give me the max now 110 is just as good if not better in many ways. Easier on the gearbox, less spring noise so the thump of the piston can be heard better. There's also less of that whiny sound at full auto. And most of all there's a neglible if any difference in range and accuracy.[/quote]

airsoft kinda reminds me of tool time...power more power more power. We're all like Tim The Tool Man Taylor in a tool shop looking to supe up and over power anything and everything before we even stop to think if it's too much or even needed.