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Filling an air tank with boost pressure

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Old Sep 21, 2005 | 07:04 PM
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From: STL Missouri
Filling an air tank with boost pressure

I know this sounds really silly, but has anyone ever piped a small air tank into the intake side with a 1 way valve that would allow the boost to fill a small air tank for something like a couple of small air horns??? I don't know what air horns (the little cheaper ones) need PSI wise to run them but I figure it wouldn't take much, or it could possibably fill a tire enough to get you to a safe place....

Maybe this is just one of my "six pack beer thoughts" but since we can hit 30 psi at WOT why wouldn't it work??? Heck with only 30 psi you could make a tank out of some HD pvc pipe and run / cap a long tube against the frame rail....

OK back to the booze ....
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Old Sep 21, 2005 | 07:19 PM
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it would take a tank big enough to dill all 6 cyl for a while..........dont think it will work,thats wgy the turbo is such a excellant eng modifier
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Old Sep 21, 2005 | 07:52 PM
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My air horns run off a 120 psi compressor.
My little 25-30 psi of boost would just make a 'Lil Toot.
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Old Sep 21, 2005 | 07:58 PM
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How about...you bleed off a little of the excess boost (is there REALLY such a thing?) and store it away in your tank - for use at low RPM or for an off-the-line kick? That might erase any turbo-boost lag...

A 1-way feed upstream of the intercooler - or even downstream, the air will cool after it exits the nozzle, or use it in the exhaust line to spin the turbo....?


- just thinking out loud -
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Old Sep 21, 2005 | 09:09 PM
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Like said it all comes dwn to the math- cyl size,cfm, x 6x rpm=a big woppin tank........not posible.great idea thoe.
Now a better -deal a cooled i.c.like fron you ac unit......someone needs to solve the diminishing return thing and therodynamic law ect ect
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Old Sep 21, 2005 | 11:34 PM
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I need some air pressure to operate my Jacobs exhaust brake. I think 30 PSI will do it. I've been hesitating installing it because I'd have to wire and plumb in a compressor, etc. I think I am going to give the excess boost system a try.

The only problem I can see with this is that one will have to run WOT every now and then to recharge the tank. Not a problem when towing in the mountains, but could be an issue when running empty or doing gentle city driving.

What is the max boost on a stock gen3 325 ?

Here is another question: what is the exhaust back pressure upstream of a closed exhaust valve ? One could get high pressure air there too. It would have to be thoroughly cooled before it hit the check valve and air tank though.
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Old Sep 22, 2005 | 01:28 AM
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Originally Posted by Superduty
Here is another question: what is the exhaust back pressure upstream of a closed exhaust valve ? One could get high pressure air there too. It would have to be thoroughly cooled before it hit the check valve and air tank though.
Guys I know with a exhaust brake back pressure gauge see around 40 psi with the brake on. Highest possible pressure would be the same psi as your exhaust valve springs, 60 psi.
Cooling it would be fun, there goes the PVC tank idea.
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Old Sep 22, 2005 | 04:40 AM
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With only 30 PSI from the turbo, you would need to get a air amplifier from your local pneumatics store to make the air larger in volume.
Naw... Just kidding before someone tries to look for one, it does not exist.
If you couple a hydraulic motor to a small air compressor you could probably tie it into your power steering circuit.
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Old Sep 22, 2005 | 05:12 AM
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I can't believe what I have been reading
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Old Sep 22, 2005 | 06:23 PM
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hey 35 psi is enough to operate an ARB locker, and you could air a tire up halfway, haha
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Old Sep 22, 2005 | 07:22 PM
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Hey , and while your at it you can take the a/c vent hose off of the passenger side and reroute it back too your air box for a true cold air intake.
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Old Sep 22, 2005 | 07:24 PM
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Don't thing I would want a questionable system operating the exhaust brake.
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Old Sep 22, 2005 | 07:44 PM
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Wonder if you could tap your leaf blower to your turbo and not have to pay for electricity or gasoline....
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Old Sep 22, 2005 | 08:07 PM
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From: P.G. Ut
Things like this have been made. In the late 70's I bought a tire inflater that attatched in a spark plug hole with a one way ball valve & 20' of hose. I still have it somewhere. I stopped using it when I started to think that putting a air/fuel mixture in a tire that heats up probly isn't the best idea in the world. I'm thinking I could use this same gizmo if I tap and thread (or weld a threaded bung) to the discharge side of the turbo then attatch it to a removable air bottle.
If it works at all with a 25 psi single then it should be more useful with a 50+ twin set up.

db
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Old Sep 23, 2005 | 10:49 AM
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From: SoCal
Originally Posted by Gear Poet
Wonder if you could tap your leaf blower to your turbo and not have to pay for electricity or gasoline....
Already been done:

http://videos.streetfire.net/Player....AD23CA9564&p=0
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