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Porchenewbe · Joined: 04 Jun 2004 Posts: 30 Location: stoke on trent

Hhmmmmm... I'm not so sure about this whole air storage tank thing.

Firstly, where would you put it.... for any meaningful performance it would be FAR to big to fit under the bonnet (hood), so the next place is the boot/trunk, but bare in mind, a compressor tank weighs a fair few pounds which u'll have to carry round all the time!! (You'll also have the weight of the compressor too!)

Secondly, assuming you have filled the tank with air and released any extra pressure, this air must be delivered to the front of the car to the engine. So 'run an air line' I hear you all cry, but a bit of 1/2" compressor pipe just isn't going to work. Bare with me for some basic maths for a minute:

Air demands per second = Stroke volume * Revolutions per second.

At 6000 revs per minute (near redline for ease of calculation) the engine is revolving 100 times per second. Therfore:

Air demands at 6000RPM = 2 litres (Engine size) * 100

Air demands at 6000RPM = 200 Litres per second!!!!!!!

Now to me that seems like a whole lot of air just to meet demands before any boost is created!!!!!!

So basically,(and this is a presumption based on the OEM 924 intake diameter) to flow that much air from the tank to the inlet manifold you'll need to run a piece of 3 1/2" diameter tubing right through the cabin!!!! NOT easy!

Finally, inorder to pressurise the system it must be completely sealed, so you cant just graft the pipe onto the intake without you have someway of electively closing off the normal inlet, can be done with an additional throttle body but is it really worth all the work?????

Hope i'm correct with all these points, my money would go on SC, if its good enough for Mercedes, Jaguar etc, it'll do for me!!!!

John.
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Riding a steep learning curve about all that is 924.

My first porsche ... I'm only 19..But loving it (except the insurance) ... quite some car.

macBdog · Posted: Fri Dec 08, 2006 12:48 pm Post subject:

Yup I completely agree. Its a dumb idea. But the theory is sound.
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1979 931 with a 350 chev
1973 911E with EFI

germ924 · Posted: Sat Dec 09, 2006 4:09 pm Post subject: regarding the leaf blower

i like..... it maybe white trash but you know if you run a tube and mount that thing under the right headlight with a inverter and a switch inside to turn on the inverter. well pretty simple. i might try it, at 80mph and 5th gear. just to see the difference. do you think i might blow something?

you really do damage with an air tank though to much psi, i would think