mack123

iTrader: (4)

I was thinking about my second gen today, and the strangest thing popped into my head...

If a guy somehow redirected the air pump hose into the main air intake hose, would it provide enough air for a performance increase?

First, the idea does have merit, a constant air supply{ air pump } is sitting right next to the air intake hose. Its already part of the car.

The air pump is a dependable unit, designed to work for the life of the car, and provide constant air supply, and it varies with engine rmp.

The cost would be minimal, simply a hose to go to the main air intake, instead of the ACV

I have never heard of it being done, so Id like to hear from all sides on this one.

Kind of like a supercharger, or minicharger, hahaha

The main prob, or question would be.. hoiw much air does that thing put out and if its an amount that would be helpful inany way ?

These cars always keep me thinking

pengarufoo

insufficient volume of air coming from that thing, if you plumbed the intake straight to the air pump (Sealed) it would just be a huge restriction.

If you plumbed the air pump just into the air intake plumbing as an additional path, it's not going to do anything useful.

Mint87RX7

LOL ive been wanting to ask the same question for like 2 weeks but didnt want to get flamed. I actually think it puts out a lot of air but i dont know how it would work without any solid numbers to look at

IanS

iTrader: (4)

I believe that people have tried with FB's, and it only helped idle a bit.

Mint87RX7

I dont think it would give you any actual boost but could possibly get you close to 0psi??? i almost want to go try it and hook up a vac guage to see what it does

neu

it would do something, if you could rig it to pump air into the intake after the TB.

RXSevenSymphonies

iTrader: (2)

There have been assloads of threads about this, it does ultra super nothing.

Mint87RX7

AFTER the tb? if it created any pressure at all it would just go back out the intake. it would have to be like a SC setup going through the afm and everything

ddub

This has been beaten to death, search and you shall get your answer. The short answer is it does nothing.

NSBerkland

you would get more from the weight reduction of ditching it.

RotaryResurrection

iTrader: (8)

RETURN OF THE AIR PUMP SUPERCHARGER!!



It's actually better to use your a/c compressor instead. Not only do you get the benefits of air being routed to the intake, but it'll be COLD air y0, and well know cold air performs mo' betta' than hot air.

totallimmortal

there is no where near enough air coming out of there besides like mentiopned before there would be nothing keeping it from just coming out the filter

Mint87RX7

well just running it into the intake is just stupid like i said but what if you made an adapter to fit on the afm, i think it would have at least a little benefit. has anyone else revved their car up to 6k and tried to put their hand over the airpump tube, it puts out a lot of pressure. i know a turbo puts out 100 times more but if the air pump put out enough to give you more air than without it then you would gain from it. rite now i have a reducer on the end of a 6 inch tube off the air pump releasing the air into the atmosphere out of a 1/2 inch hole instead of the 1 inch tube. my 5/6 ports and vdi are ran by a tube i have fed into it (into the side of the tube, it still constantly lets air out to atmosphere) and when the rpm switch opens the valve the ports open instantly so i know there is at least 5psi without closing off the end of the tube on the airpump.
does anyone have any info on the output of the airpump??

Mint87RX7

This is what it says in the fsm, i dont know what it means though can somebody translate?
11.8 kpa (0.12 kg/cm^2, 1.7 psi) at idle

NSBerkland

ohman that just made my day

Mint87RX7

I would go out and try hooking mine up but i have all my crap hooked up to my 5/6 vdi rite now. i want to see what it does

88t2romad

maybe if you put like 10 airpumps on the car......that would make mAD P()wEr YO to the izzo!i!i!i!!111one1!!on1oneone1on1!!

Mint87RX7

that was realy funny...

jhammons01

(0.12 Kilgram/Centimeter^2 at 1.7 Pounds per square inch) while the car is idling.

I think

Mint87RX7

i meant can somebody translate what kind of airflow that is. i have now experience with flow numbers, just looking for a comparison

88t2romad

have you taken off an airpump and spun it by hand and felt how much air it pumps?

Mint87RX7

ya, not much. but like i posted before, when its going fast it pumps a lot of air, enough that i could not block it with my hand. I am not expecting it to give positive psi like a turbo would, there is not enough pressure for that. but if it were to at least get the intake to 0 psi it would be a huge difference. i think at high rpm an n/a has like 10psi of vaccum, if anybody knows the actual number please post

Mint87RX7

LOL, I found it. this is the same idea 3 years ago, after all the flaming im surprised he still posts on the forum. im still reading to see if there are any real numbers in it to see if it will work
https://www.rx7club.com/showthread.p...p+supercharger

jhammons01

There is not enough info to translate to CFM ( correct me if I am wrong)
11.8 kpa=Kilopascals

0.12 kg/cm^2= Kilograms/square centimeter

1.7 psi=Pounds oer square inch........at idle

These are all mesurements for ultimate pressure. I can't figure out how to convert to Cubic feet per minute, which is a volumn mesurement. Your compressor may reach 250 PSI but it will take all day to get there because the volumn is not very high(picture one of those little comps that are the size of a two cans of beer.

OR you have a compressor that is made to have a high throughput but only reaches 60PSI. (Picture one of those that a painter uses. )

I looked on my air pump but I could not find any numbers. Yours may not be mounted in a car and you can see more numbers. Look for:
m3/h=cubic meters per hour
CFM=Cubic feet per minute

RotaryResurrection

iTrader: (8)

Any engine (natural aspirated), when at WOT, produces 0 vacuum and 0 boost. WOT, unless there is a special circumstance, is the definition of atmospheric. Look.

All around you and your engine is atmospheric, 0 vacuum, 0 boost. Atmosphere is represented as 0 on your boost or vacuum gauge. This is why, when the car is off, the gauge zero's out...atmosphere is the only force acting on it at that time.

So, the engine is running, at idle. During idle, your throttle plates are almost all the way closed...barely cracked enough to let a little air through. Your engine is spinning, and the force of the rotors drawing away from the intake ports is trying to pull air in...but the throttle plates are closed, so not much can enter. Thus, a vacuum is created everywhere between the intake ports and the throttle plates.

Now you open your throttle plates...the engine's vacuum now pulls in more air past the open plates...therefore, the vacuum drops during the time when the air is rushing in.

Open the throttle all the way...unless you have a terribly restrictive intake, there is now almost 0 vacuum in the intake...because there is no BOUNDARY between the atmosphere around, and the engine...the plates are all the way open. There is a very small amount of vacuum present in certain areas of the intake, which is what continues to pull air into the engine.