How much physical force a turbo puts out

[sjgYFZ200]

just wondering, how much air does a turbo push out? sure you can mesure it, but if you were to stick your hand up to it, would it be like a hairdryer or leafblower?

 

[2gGSX]

You should find out and tell us

Just kidding, but flow maps are able to tell us how much CFM (cubic feet per meter, of air) a turbo will push. So, to answer your question in short: it's not.

 

[mntalon_05]

well a friend of mine at a local tech school said a kid got his hand sucked to the end of an intake tube on a dodge cummins turbo diesel truck during class one day and it literally ripped flesh off his hand. I know that's the opposite end of what you're asking for, but it gives an idea of how much air is moved. he might have been blowing smoke up my arse too though, haha.

 

[Defiant]

Well, if it's pushing out 15psi, then it's pretty much 15 pounds per square inch, isn't it. So do the math for the area of the outlet. That's if you meant how "hard" it pushes instead of how "much".

 

[CanadianTSi]

with my crappy math skills... a 2.5" UICP with 15psi in it would have about 900lbs of push....maybe

 

[Thomas91169]

umm if its 15psi, and youre using 2.5" piping, then its 2.5x15, which is 37.5lbs of pressure going through the pipe. im pretty sure thats how you would calculate it.

 

[CanadianTSi]

You need to find the Area of the 2.5" pipe which would be 3.14 times the radius,squared. Then times that by the 15psi...and yes I was wrong I think it would be more like 230 lbs of Push.

 

[Thomas91169]

well doing that its like 60lbs of push.

the radius of 2.5" is 1.25", multiply that by Pie(3.14 i used) and multiply that by 15psi and you get 58.875.

 

[CanadianTSi]

well doing that its like 60lbs of push.

the radius of 2.5" is 1.25", multiply that by Pie(3.14 i used) and multiply that by 15psi and you get 58.875.

i think you forgot to square it...3.14 x 1.25=3.925x3.925= 15.41x15psi = 231

 

[LousyDriver]

Area = pi r ^2
3.14 * (1.25^2) = 4.90 inches^2
Force = Pressure * Area = 15 psi * 4.90 = 73.6 lbs.

 

[CanadianTSi]

Area = pi r ^2
3.14 * (1.25^2) = 4.90 inches^2
Force = Pressure * Area = 15 psi * 4.90 = 73.6 lbs.

My math blows, thanks for clearing that up

 

[snailpower]

A buddy of mine said he talked to a guy with a 4g63 colt (drag car), at the track the turbo sucked part of the harness into the inlet and also there was a picture(on here) of a guy who got his hand sucked into his turbo and F'ed him up. I suck at math but if a turbo can do that its drawing in some serious air.......Thank you gentleman I bring nothing else to the table

 

[sjgYFZ200]

sorry i havnt checked this thread in a while. so yeah, what i ment is how hard is it pushing? by the sounds of like 230lbs, that would be a leafblower x4? haha thats alot but thats really cool, thanks

 

[psychlow]

You also have to factor that the 15PSIG is ON TOP OF what the engine is ingesting and using for combustion.

 

[aleccolin]

A "small" 16g is rated at 505 cfm at 15 psi. Actually it's at 14.7 psi which is a pressure ratio of 2.0 on the compressor map, also known as 1 bar. This rating is almost always using the 60% compressor efficiency curve. The most heinous 25cc gas powered leaf blower you can buy from Sears is rated at 410 cfm and is hailed as a 205 mph leaf blower. I doubt the leaf blower is as conservatively rated as MHI does their turbos and of course the exit velocity is a function of the cross-sectional area of the reduced and flattened tip on the leaf blower, but I doubt that is really much less than the outlet of the turbo. So as far as force just imagine something like a 35cc industrial backpack style leaf blower at full song and that's not a bad approximation.