Would This Work???

[dragracing1213]

Hey i have a little air compressor/inflator thing and I hooked it up to my air intake...if i turned it on...would it add enough air to see a noticable increase in speed??? Just wondering...I will get pics later...

 

[theo]

you have to add extra fuel or it will burn lean, or it might not even run.

theo:rolleyes3:

 

[l0ll00l]

When an engine, even a small one, is at high RPM, it takes quite a bit of air to create any pressure in the intake manifold. If you're talking about a small tire inflation compressor like this, i seriously doubt it moves enough air to create positive pressure at any RPM. Won't hurt anything to try, but if it is capable of increasing the air pressure, you will need to get more fuel to it, like theo said.

 

[dragracing1213]

how would I add more fuel...would i need to adjust the carburator...and if so...how do i do that...

 

[l0ll00l]

Adding more fuel sometimes requires installing a new, larger jet, or adjusting the fuel mixture screw. Have you tried running the engine with the air compressor hooked up?

 

[theo]

You will have a hard time to get it to work through the rpm range, because with that blower is not proportional to the engine. If you set it up for full throttle, then as soon as you come off, to much air.

theo

 

[dragracing1213]

i have run the engine with the air compressor running and it did make a very small difference in performance but maybe if I adjust the air/gas mixture screw like you were tallking about
|0||00| it would make a bigger difference...

is this the screw???

 

[l0ll00l]

I'm not familiar with that carb, but that appears to be the the full throttle stop. It's either that, or the idle adjustment screw. Not the fuel adjustment.

 

[jr dragster T]

Thats your idle:rolleyes3: It Appears your fuel mixture needle has a cap on it.

 

[EagleTalons]

That appears to be an idle speed screw. Is there a screw on the bottom of the float bowl?

 

[dragracing1213]

OK im kinda a newbie to modding go karts so I need to know...what is a float bowl?

 

[Buick455]

I’m sure I will word something incorrectly and get jumped by someone more experienced in this, but the principal of the pressurized air in the intake is basically to make your motor (a big pump) pull more aspirated fuel and air then normally done just by the pistons down stroke (intake stroke). Superchargers and Turbo's do this by taking either the rotation from the motor itself to force air into the intake (Supercharger) or use exhaust pressure to create rotation in a second pump on the same shaft (Turbo). In both cases the pressure is created in a way that’s proportional to the engines RPMs. An off the motor, separately controlled pump won’t be good b/c the higher the RPM’s get the pump stays the same. Hooking a bike pump would be less effective then a velocity stack IMO.

My head hurts, I shouldn't think this hard right after dinner...

 

[l0ll00l]

You are completely right. Not only would the air that the pump puts out be disproportionate to the engine's needs, it would very likely be far too small to do anything. Those air pumps are made to pressurize a tire. They don't have the ability to create high volume airflow, just high pressure over time.

 

[l0ll00l]

OK im kinda a newbie to modding go karts so I need to know...what is a float bowl?

The float bowl is the bowl shaped part of the carburetor directly beneath the primer bulb in the picture. It's held on by the nut at the bottom of the bowl.

 

[Buick455]

http://gokartguru.com/go_kart_blue_prints.php
http://gokartguru.com/super_charged_go_karts.php

Look at this guys videos. If you watch the top video in the second link you can see the charger being driven by the crankshaft.

Of course now all this got me thinking. I'm sure it’s been tried but I have never seen one.

A sensor that reads the engines rpm, then controls the speed of an electric charger. There by creating pressure per rpm without robbing energy from the crank. Are you all confused yet I am :rolleyes3:

 

[modelengineer]

But none of those electric superchargers work, and they run at full blast all the time AFAIK...

 

[dragracing1213]

Ok thanks everybody...I will have to try something else to get some more speed...

 

[jr dragster T]

It takes those 12 v electric pumps like 50 seconds to get a 2.35" X 27" bike tire to 40-50 PSI and thats NO WHERE near enough air for even the smallest of small engines.

 

[dragracing1213]

thanks I didn't know how fast it would pump the air...what are some things kind of like this that I could use that would be better???

 

[modelengineer]

As far as I know there is only one electric supercharger which actually works, and it is HUGELY expensive, can only make boost for a few seconds, and only makes around 6 psi on a car. This would work on a kart, but you would need a massive battery and an alternator. Waste of money.

*EDIT* this is the one I am thinking of. 18hp of electric motors, so... more power than is in most karts here is required just to drive the thing.

http://www.turbomagazine.com/tech/0406tur_knight_turbo_electric_supercharger/index.html