Crazy idea or what?

Submitted: Friday, Feb 13, 2004 at 01:41
ThreadID: 10500 Views:1417 Replies:7 FollowUps:7
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While idly looking at a table for Hp gain per blower boost: http://www.csgnetwork.com/blowerhpcalc.html
I had this idea I would like to present to the wisdom on this forum.
What if I connect an air line from the car compressor reservoir to the intake manifold, fitting an electrically operated dump valve there?
Nothing would happen until I'd press a button on the dash, which would activate the dump valve and empty the air reservoir into the manifold. This ought to increase the pressure in there and the engine getting a power surge for a few glorious seconds.
Would this work? I'm talking about a normally inspired diesel motor there.

When you use the calculator above, just a small increase, like 5 PSI, results in quite a large power gain. And, if one selects the air orifice carefully this pressure might be maintained for a few seconds.

Usefulness, well the extra kick in the pants power might come in handy in a pedal to the floor situation :-)

fire away, all comments welcome.

Klaus
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Reply By: Member - Ross - Friday, Feb 13, 2004 at 02:01

Friday, Feb 13, 2004 at 02:01
Klaus

No mechanical expert here, but wouldn't it just make for a lean fuel/air mixture??

CheersFidei defensor

Rosco
AnswerID: 46555

Follow Up By: Member - Ed. C.- Friday, Feb 13, 2004 at 02:10

Friday, Feb 13, 2004 at 02:10
Ross,
pretty much what I was getting at (below)....
looks like you posted while I was "compiling my reply"....
Regards, Ed. C.Confucius say.....
"He who lie underneath automobile with tool in hand............
Not necessarily mechanic!!"
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Follow Up By: LBJ - Friday, Feb 13, 2004 at 10:04

Friday, Feb 13, 2004 at 10:04
yeah you'd have to increase your fuel aswell to really notice anything....
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Reply By: Member - Ed. C.- Friday, Feb 13, 2004 at 02:07

Friday, Feb 13, 2004 at 02:07
Klaus,
Wouldn't the fuelling need to be adjusted to be able to make use of the extra air??
(as is presumably the case with turbo & s'charger installations)....
Now if you could work out a way to "give it a shot of ether" as you dump that extra air in there, well... who knows??? ..... hehehe
Regards, Ed. C.Confucius say.....
"He who lie underneath automobile with tool in hand............
Not necessarily mechanic!!"
AnswerID: 46556

Follow Up By: GaryInOz (Vic) - Friday, Feb 13, 2004 at 03:54

Friday, Feb 13, 2004 at 03:54
Would work up to a point with EFI with mass airflow sensor, but would be very short term.

40 litre tank (1 metre x 250 mm) @ 10 bar (150PSI) = 400 liters of air.

Assuming 4 litre engine swept capacity every 2 revolutions (effectivly zero boost) the 400 litres would last 800 revs of the engine. At 4000 rpm (you wouldn't be using it off idle) it would last avbout 12 seconds, less if you actually wanted boost. I.E. just long enough to get you into more problems that you would be likely to get out of.
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Reply By: Wayne (NSW) - Friday, Feb 13, 2004 at 06:53

Friday, Feb 13, 2004 at 06:53
I think someone by now has tried it, and the fact that there is nothing on the market means it has not been perfected yet. It is not only air pressure but volume.How about cold air from the A/C pumped in to act like a intercooler?

Wayne
AnswerID: 46558

Reply By: Mick - Friday, Feb 13, 2004 at 08:29

Friday, Feb 13, 2004 at 08:29
Why dont you fit a small bottle of LPG under the bonnet, hit a switch and inject it through an injector nozzle to give it about 50% more power for a few seconds. Its been tried tested and it works well.
Some trucks were fitted with this in the early days for big hill trips like mt Vic.
The small amount of air your talking about wont do much, you need a higher cfm and an aneroid, or air fuel ratio control to increase the fuel as you dump it.
Ive tried injecting ether on my GQ old shortie, but it pinged like crazy, this was before i had a blower on it, before i changed camshafts, high flowed turbos, rally spec injection pump, and adventually got 140hpat wheels!

Keep thinkin.
AnswerID: 46559

Reply By: Member - Ross - Friday, Feb 13, 2004 at 09:04

Friday, Feb 13, 2004 at 09:04
BTW Klaus

You wouldn't be related to Mel Gibson by any chance? He had it well set up in Mad Max.

You'll also probably need a bucket attached to the exhaust pipe to catch all the broken bits as they're squirted out the back ............. ;-DFidei defensor

Rosco
AnswerID: 46563

Follow Up By: Allfour4x4 - Friday, Feb 13, 2004 at 17:10

Friday, Feb 13, 2004 at 17:10
Hey just an idea,
If you then fed the broken bits back in just before compression stroke,
their bulk would raise the cylinder pressure - There-by creating more power and even more bits which would then create yet more power and even more bits........................

Glenn B.
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Reply By: KENM - Friday, Feb 13, 2004 at 09:07

Friday, Feb 13, 2004 at 09:07
There is nothing to stop the air going in the opposite direction towards the air filter so no pressure.
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Follow Up By: Member - Bradley- Friday, Feb 13, 2004 at 10:51

Friday, Feb 13, 2004 at 10:51
Ahh yes, good spot there, you can go home 10 minutes early today :-))Moo... everyone knows what a Jackaroo looks like :-)
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Follow Up By: V8troopie - Friday, Feb 13, 2004 at 18:59

Friday, Feb 13, 2004 at 18:59
And the winner is..... KENM :-)

how come so many of you did not spot the obvious? Well, it was late at night when I thought that one up.
BTW, I would be too scared to try the suggestion of injecting propane into a diesel engine...

Now, while we are on boosting, how would this gadget work:

www.electricsupercharger.com/

They just bolt on, apparently no fiddling with fuel ratios.

Klaus

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Follow Up By: GaryInOz (Vic) - Friday, Feb 13, 2004 at 19:53

Friday, Feb 13, 2004 at 19:53
In a word or two, they don't. Only good for japanese "Kei" class vehicles, for much the same reasons as above (not enough capacity x time). Any boost system would have to incorporate the entire inake system through it or have a valve to isolate it during boost.
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Reply By: Member Eric - Friday, Feb 13, 2004 at 20:46

Friday, Feb 13, 2004 at 20:46
Sorry it took a while to reply but I couldnt stop laughing when I read the poast . As a thought its great . In reality its a no go . How a blower works , is like a copressor , yes this part is correct , but how a rotor compressor works , its it creates pressure in the manifold from the air above it , as the rotor turns , it pumps air into the manifold creating pressure , the rotor spining 1 way also stops the air from coming back up . If you dumped a whole heap of air into the manifokd , all that would happen is that the motor would stall ,depending on were the air inlet came it , it would either siphen fuel out of the cilinder or blow the fuel mixter all over the place Venus Bay
AnswerID: 46632

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