Honda Spree and Elite 50 Forums

Bear45-70 wrote:You guys really don't understand how a carburated turbo system works or even how a carbed mechanical blower system works.

all my experience with turbocharged systems have been EFI, not carbureted

But i have seen plenty of carbureted turbo setups.

Most are draw through types where the turbo comes after the carb.

Like this

suck through carbs are the easiest because any carb will do. The mixture will always been funky however, just a little funky.
Blow through carbs are the best. They're difficult to set up carbs don't like positive pressure, difficult to tune and flat out not going to happen with this application.

PimpinSpree wrote:

Bear45-70 wrote:You guys really don't understand how a carburated turbo system works or even how a carbed mechanical blower system works.

i sure don't, why don't you explain it. I've always been confused on how you would get the air fuel mixture right without fuel injection

OK, first do you understand the principles involved in how a carb pulls fuel thru the jets into the venturi?

Bear45-70 wrote: OK, first do you understand the principles involved in how a carb pulls fuel thru the jets into the venturi?

Moving air = less pressure

this negative pressure "pulls" the fuel thru the jets into the venturi.


Yes/no?

Trafficjamz wrote:

Bear45-70 wrote: OK, first do you understand the principles involved in how a carb pulls fuel thru the jets into the venturi?

Moving air = less pressure

this negative pressure "pulls" the fuel thru the jets into the venturi.


Yes/no?

What happens if you make the air thru that same venturi move faster?

Bear45-70 wrote: What happens if you make the air thru that same venturi move faster?

More fuel will be sucked up to go with it (if the jet is big enuff)

Trafficjamz wrote:

Bear45-70 wrote: What happens if you make the air thru that same venturi move faster?

More fuel will be sucked up to go with it (if the jet is big enuff)

With the same sized jet if the suction is higher there has to be more fuel flow. This is basic physics. What limits the flow of the jet is not the just the size of the jet, but how much suction (vacuum) is applied to pull the fuel thru it.

Question, if you have 2 a 2 1/2 inch fire hose and one has 50 PSI applied to it and one has 100 PSI applied to it, which one flows more water. The same principle works for the jet.

...ok i think you just proved that we can but a turbo on a carbarated motor right?

Yep. Same principle as a rising rate fuel pressure regulator if you know EFI systems. Hands down more pressure equals more flow.

Bear45-70 wrote: Your problem is you and a number of other guys are stuck on the hair dryer and not evaluating what is being looked at now.

Can an Electrical Ducted Fan still be efficient when moving a gas/air mix?

One other thing to consider would be how to vary the speed of the EDF based upon throttle position.

Maybe just ON and OFF ?

How much are those fans anyway?


Still not convinced that any of this would work

Trafficjamz wrote:

Bear45-70 wrote: Your problem is you and a number of other guys are stuck on the hair dryer and not evaluating what is being looked at now.

Can an Electrical Ducted Fan still be efficient when moving a gas/air mix?

One other thing to consider would be how to vary the speed of the EDF based upon throttle position.

Maybe just ON and OFF ?

How much are those fans anyway?

Still not convinced that any of this would work

Does a jet engine the work better or worse when water is added to the incoming air?

The EDF have a speed control system available for them. How do you think the guys get the model airplanes to taxi and then take off?

I wasn't aware there was a cost limit on this project, especially since a turbo setup is several grand. No, they are not cheap but neither is any power enhancer.

Bear45-70 wrote: I wasn't aware there was a cost limit on this project, especially since a turbo setup is several grand. No, they are not cheap but neither is any power enhancer.

Of course there is

I already said that this could be done for a couple thousand $.

http://www.chinese-parts-canada.com/tur ... ction.html

I should be able to get everything done in under $200. I'm waiting on intake, pipe, ramp plate, jets, various other parts before I start the



ELECTRIC TURBO!

nickisaninja wrote:I should be able to get everything done in under $200. I'm waiting on intake, pipe, ramp plate, jets, various other parts before I start the



ELECTRIC TURBO!

Please start a new thread when you start this Electric Turbo.
I will follow it for sure.

Under $200 huh? Doesnt the EDF cost more than that?

Nope an EDF will be cheaper than that. A relatively small EDF will be suitable. An EDF with motor will run 80-100.
Most I'm looking at are between 68-80mm and push at least 3lbs of static thrust at ~14volts.