How hard can a human blow? (1 Viewer)

[Thorin]

Yeah, funny. Hardee harr, you can be more creative than that.

Anyway, I have a legit reason for asking this, and my searches have failed to produce a good answer. Do any of you know how many PSI an average human can compress out of their piehole? Seriously.

 

[RSF]

Blow into a tire gauge.

 

[Thorin]

Blow into a tire gauge.

Hell, I might if I knew how to depress the center pin at the same time.

 

[DadsDream]

Gordon Cooper: [during the lung capacity test] Ha! 93 seconds. Read it and weep
[notices Glenn and Carpenter are still exhaling]
John Glenn: [Glenn has run out of breath well past Gordo's time] Congratulations, Scott. Darn good.
Scott Carpenter: [shaking Glenn's hand] You were probably just getting warmed up, John. Next time I doubt I'll be the one to win.
Gus Grissom: [to Gordo] You hear that? We were competing with Archie and Jughead.

breathing: Definition and Much More from Answers.com

 

[diat150]

my guess would be around 6 psi.

 

[diat150]

ok, i just tested it out using a electronic psi gauge. highest I could get was 2.4 psi, and it felt like my eyes were about to pop out of my head.

 

[ibelieve]

Ask Dirk.

 

[Danchrism]

11

 

[Thorin]

Thanks for the responses, I can only assume that whatever value is attained should be added to the atmospheric pressure, which I believe is around 7 psi at sea level. My reason is a total gearhead reason. I'm trying to troubleshoot a small Suzuki engine that has low compression. I have the head off, and I was wondering if I could test the valve seat / valve integrity simply by blowing into the intake / exhaust manifolds that are affixed to it. I'm already all set to have the cylinder bored, new piston, rings, etc. But, I really want to diagnose the head before I put it back on. I popped the exhaust valve off, and the seats look decent, but I'm still not sure. When I blow as hard as I can into the intake and exhaust ports, there is no leakage. I was wondering if this was a sufficient test of valve sealing. Peace!

 

[diat150]

Thanks for the responses, I can only assume that whatever value is attained should be added to the atmospheric pressure, which I believe is around 7 psi at sea level. My reason is a total gearhead reason. I'm trying to troubleshoot a small Suzuki engine that has low compression. I have the head off, and I was wondering if I could test the valve seat / valve integrity simply by blowing into the intake / exhaust manifolds that are affixed to it. I'm already all set to have the cylinder bored, new piston, rings, etc. But, I really want to diagnose the head before I put it back on. I popped the exhaust valve off, and the seats look decent, but I'm still not sure. When I blow as hard as I can into the intake and exhaust ports, there is no leakage. I was wondering if this was a sufficient test of valve sealing. Peace!

atmospheric pressure is around 14.7 psi.

 

[Thorin]

atmospheric pressure is around 14.7 psi.

Yes, 14, thank you.

 

[diat150]

I dont think atmospheric pressure comes into play in your scenario though.

 

[robsmith32]

I dont think atmospheric pressure comes into play in your scenario though.

me either, as it would actually work against you, not with you. maybe an air compressor that had a fitting that would fit.. but other than that.. maybe pressing with a finger, instead of trying to use air.


fwiw, you wouldnt' depress the center of a tire guage..that pin in the middle of the gauges is to depress the valve stem to allow the air pressure to go into the guage.

dd, wouldtn' that from answers.com be for air cfm, not psi?

 

[Thorin]

I dont think atmospheric pressure comes into play in your scenario though.

Yeah, after thinking about it I guess you're right again. The pressure is equal on both sides. I just wish I knew for sure if this head is in good shape before I put it back on. It's an overhead cam unit, I'd hate to have to pull it back off to take to the machine shop. Thanks.

 

[Thorin]

fwiw, you wouldnt' depress the center of a tire guage..that pin in the middle of the gauges is to depress the valve stem to allow the air pressure to go into the guage.

Yeah, that was stupid, I now realize that the pressure gauge has a permanantly fixed pin that is meant to depress the valve.