ScrapMaker

Could it be possible to, instead of removing the smog pump, to somehow use it to blow cold air into the intake? Maybe even create some boost? I have read on the internet that our cars come with the same smog pump that came on much bigger vehicles, but I'm not sure. I also read that these things can create high-pressure air-flow.

Also, people have told me over the years that cars with computers really need the smog pump due to programming in the ECU, is this true?

One other thing, I actually read about some guy who made a supercharger out of his A/C compressor, then he even had an electric clutch, because all you need to do is turn on the A/C, hehe .

vsixtoy

An old VW trick is to use an early Buick smogpump belt driven to the crank of a pancake type1 motor and it would produce 3lbs pressure into the stock 34pic carb- but were talking a 1600cc motor.

br()bert

A smog pump would not even overcome vaccume.

Yes you can remove it from a CC car.

And this has been talked about before.

Project: 85 2.8 bird

Sounds sort of like THIS Set up I'm looking into. On the Aussie boards, a guy w/aSeries I 3800 w/an afpr got some decent power. $1800 Austrailian is pretty good, just have to find the correct intake for it & see how much rapage shipping is

FbodTrek

How much is that in US currency? not to bad a deal, although, the boost is a little low.....I had that idea 3 years ago, AC clutch engaged SC...Blitz beat me to the copyright

Project: 85 2.8 bird

1,259.67 USD

http://www.xe.com/ucc/convert.cgi

They're engine specific for their kits, but I'm sure if you fab up a bracket & find some crank pullies............

ScrapMaker

page didn't work...

but it seems that 3 psi is kinda low... I would think you would want at least 5-8psi... if not more...

Project: 85 2.8 bird

change the pulley

RedTtop5spd

iTrader: (1)

Try this page. http://www.xe.com/ucc/

I think that is the page Project was after.

Dale

iTrader: (12)

Dont forget that the stock smog pump uses hot engine bay air. Not outside cold air, and no good way to route it.

TekViper

only thing useful you can do with the smog pump is get a kit to turn it into a vacuum pump and create a vacuum in the crankcase. it will help piston rings seal better and can produce as much as 20hp on a race engine but you're looking at very minimal gains on a stock engine. worth a shot if your hellbent on defeating emission controls that make the air your breathe better for no reason at all

SSC

Actually you can make a smog pump a fresh air pump, just take the hose off the mnifold valve and route it up front. Would it be worth any power or the $8 of 3/4in hose is question.

camaro_junkie

I also had the idea of an AC pump SC. I was thinking more along the lines of hooking it up to the intake before the MAF while leaving the stock intake there. Since my car has an AC bracket but no AC, it would be a supereasy set up. Maybe not a whole lot of gains, but worth the try.`

Dale

iTrader: (12)

actually, the smog pump sucks in engine bay air, and pushes it thru the exhaust.

I dont see how you can get fresh air into the intake with it

SSC

No it sucks exhaust from the exhaust manifold/manifolds and directs it into the induction stream. It only does this in cycles though determined by temprature. I forget what the "exact" setup is on an injected 6 but a V8 for example has a temprature controlled vacuum switch either in the manifold or on the t-stat housing. This is activated by coolant temprature and allows full vacuum to reach the valve on the smog pump and it turns allows exh to be cycled through the induction system via the tubes on the exh manifold. Usually you can hear when the smog pump is activated by a humming/buzzing noise especially if the induction hose or air cleaner is off.

Now if you were to plug the exh manifold tubes off, route the 3/4 hoses to the front of the nose and pull the line fron the temprature controlled vacuum switch and install it to full manifold vacuum you would have a pump that sucks in fresh cooler air as long as the engine is running. I actually did this on my I6 bronco, cant say it did anything power wise but it dident suck hot air anymore.

Dale

iTrader: (12)

Sorry SSC, but my smog pump blows air thru the 3/4" pipe. And it never was hooked up to my intake system, other then the vacuum tube.

Now my EGR sucked hot exhaust air, and routed it into the intake.

br()bert

Isnt it wonderful? Gm thought, hey lets blow hot exhaust air into the plenum and cooler air into the exuahst!

camaro_junkie

I'm confused by your response, but this part is wrong. The smog pump pushes air into the exhaust. The EGR "sucks exhaust from the exhaust manifold/manifolds and directs it into the induction stream".

edit: I see that Dale already said this.

It's not that they decided to blow hot air into the plenum, it's that they decided to blow inert air into the plenum and there's not much choice whether or not it is hot.

SSC

Actually smog pumps do both at least most GM pumps do. There are 2 valves one diverts exhast air into the engine the other takes fresh air some do take hot engine bay air and induct it into the cat. If you realy get into how certain things like smog pumps and EGR valves actually work and thier function durring the operation cycle its neat "trick" stuff.

camaro_junkie

I'm not so sure this is the case on my car, but I'll try and remember to check it out.

What was this thread about? Turning small air pumps into superchargers? I wonder if you can see a little bit of improvement by forcing a small amount of extra air into the engine.

SSC

One day I gotta figure out how to take snapshots from M-O-D.

Anyway it shows the MPI for your year (86) has the standard 4 flanges. Of course it is controlled by the ecm so my early statement about using manifold vacuum to operate the valve to full divert "air to intake" GM speak (deceleration mode) would be a tad harder but still possible. In decel mode it diverts air into the inatake to prevent poping. It does this at high RPM and when the ECM detects a rich condition as well. So in essence it does force pressurized air into the intake like a supercharger durring the mentioned conditions but not all the time.

MrDude_1

to create boost, you have to shove more air in the intake trac then the engine is using.

so unless the intake is sealed off and all the air comes thru the blower, it isnt going to do a lick of diff..... it might as well be free wheeling in the air.

the very largest of pumps on the very smallest of motors, can possibly create some boost, but i doubt they are efficent, and some i dont think could contain pressure anyway....

Rivven87

Some year smog pumps, the second valve doesn't divert to the cat. Mine's an 87 SC, and it just goes and blows it back into the engine bay once the engine has warmed up and it's not blowing it into the exhaust.

If, for some strange reason, you got the front of the pump to pull cold air from under or forward of the rad, and you just ran that second line to the intake instead of to a little can full of cotton and mesh... well. I'm not sure what the point would be. It's air, but it's not very forceful air.