another new guy from NC

[Tig]

In the last picture posted, you can vaguely see the line coming down to the motor and wrapped in tape. That went up to the rear of the carb.
I'll get a more detailed picture of it tomorrow.

What kind of mods could be done to that motor to give it a little more power?
I was told a different intake, exhaust and something about a fuel pump.
What do you guys think?
Thanks

 

[danssoslow]

As long as you have a gravity feed tank, a fuel pump is useless. The mufflers screw into the block don't they? Rather than having a flange?

 

[Tig]

I was a little confused about the whole fuel pump idea, just doesn't make sense to me.

The exhaust seems to have a 2 bolt flange. Its pretty much just a piece of tubing right now, with an added flange at the end for a bolt on muffler.
I'm going to make a longer exhaust out of some tubing I have lying around, hoping it will quiet it down some.

 

[danssoslow]

If you still want a muffler, you would be able to screw one of those tubular shaped ones in by welding a 3/4" threaded coupling (in the electrical section) onto the end of your header.

I forgot how flatheads work. The carb siphons gas directly from the tank. I don't see how you could even mount a pump there.

 

[Tig]

I'm with you, not sure how you'd use a pump either.

I'm more than likely going to make my own muffler to add onto the header.
I figured if I add some length and some bends to a header it may tone it down some, not a whole lot but enough to where its tolerable. If its unbearable that's when I'll toss the muffler on , My little girl is not a big fan of loud things.

 

[Poboy kartman]

In the last picture posted, you can vaguely see the line coming down to the motor and wrapped in tape. That went up to the rear of the carb.
I'll get a more detailed picture of it

That's not a big deal. It's a breather tube to vent crankcase gasses. It should go into the tappet cover.You can either get a new one or wrap that one with electrical tape. It's not going to affect performance.

Edit: make that valve spring cover-I must be getting senile. .....

 

[OzFab]

That's not a big deal. It's a breather tube to vent crankcase gasses. It should go into the tappet cover.You can either get a new one or wrap that one with electrical tape. It's not going to affect performance.

Edit: make that valve spring cover-I must be getting senile. .....

That was close

The pics below show what it should look like...

I'm with you, not sure how you'd use a pump either.

B&S are the only company that makes the suction carb. By replacing it (as many people do) you then need to add a pump to feed a gravity fed carb or remotelt mount the fuel tank above the engine as opposed to under the carb...

I'm more than likely going to make my own muffler to add onto the header.
I figured if I add some length and some bends to a header it may tone it down some, not a whole lot but enough to where its tolerable. If its unbearable that's when I'll toss the muffler on , My little girl is not a big fan of loud things.

I made the muffler you see in the pics; take a piece of very thin wall tube the same diameter as the exhaust port, drill a bunch of holes in it, weld a washer inside the tube about half way along, then cover it with another piece of tube around double the size & close off the ends with sheet metal. There's pics below of a larger version to help you out...

 

[Half-breeder]

I made the muffler you see in the pics; take a piece of very thin wall tube the same diameter as the exhaust port, drill a bunch of holes in it, weld a washer inside the tube about half way along, then cover it with another piece of tube around double the size & close off the ends with sheet metal. There's pics below of a larger version to help you out...

IMO(cause I use to make silencers....coughcough... I mean suppressors...)... I woulda packed the area between the 2 tubes w/ wire padding(SOS scrub pad)... but im 'sure' compared to a 'straight' pipe it 'suppresses' none the less. Nice job!

 

[OzFab]

Good idea & I did think of that but, I also thought about how easily it would burn during welding

As it turns out, with the washer (or slug, whatever you choose to use) interrupting the flow, the exhaust is then forced into the outer chamber & back into the main pipe, creating all the suppression needed...

The main reason for that muffler is the little princess doesn't like loud noises either.

So, what's it sound like?

 

[Half-breeder]

gotcha... the filling would be for the heat exchange from inside to out(and for suppressing too ofcourse). Ive gotta life long tat because of a hot muffler...

 

[landuse]

I have moved this thread out the introduction section into the discussion section. Kinda seems like it should be here now after 4 pages

 

[philip metzner]

I am almost 100% sure that is a Proline kart. Nice karts made by Doug Henline, the same guy that makes the douglas wheels. Those karts are the only ones I know of with center mounted pedals.

 

[Tig]

Wow, I have been moved

Thanks Poboy, I appreciate the info

Fabroman,
Do you have any pictures of a B&S with a fuel pump being used?
Nice muffler, pretty cool idea. I've made a few myself (tig as in tig weldor ) I've used both SS sos pads and fiberglass packing. The perforated tubing is also sold already drilled out by several bike supply companies. I'm not sure I have the patience to layaout and drill all those holes, hah.
Your kart is very quiet, nice.
Mine will be for this motor, the replacement is another story
I'll have to take some videos of it running, I'll try to get them up asap.

landuse,
4 pages, nice hah

Philip,
Did they put any kind of ID tags any where in particular?
It has something stamped in the spindle hanger, like stated in the Margays site.
I'll be checking that closer when I have more time.


Thanks guys

 

[Poboy kartman]

I have moved this thread out the introduction section into the discussion section. Kinda seems like it should be here now after 4 pages

Good idea. Where else are people going to learn about " North Kackalacky" unless they watch "Pass Time"......

 

[OzFab]

Fabroman,
Do you have any pictures of a B&S with a fuel pump being used?

Unfortunately, no. I've heard of it being done, never actually seen it...

Nice muffler, pretty cool idea. I've made a few myself (tig as in tig weldor )
Your kart is very quiet, nice.

Thanks

The perforated tubing is also sold already drilled out by several bike supply companies. I'm not sure I have the patience to layaout and drill all those holes, hah.

True but, there needs to be a break somewhere (a certain amount of solid tube) & can you get it small enough to match the exhaust port?

 

[Tig]

Good idea. Where else are people going to learn about " North Kackalacky" unless they watch "Pass Time"......

Hah, that's funny and so true.
I cant say I'm originally from NC though.

Unfortunately, no. I've heard of it being done, never actually seen it...

Thanks

True but, there needs to be a break somewhere (a certain amount of solid tube) & can you get it small enough to match the exhaust port?

The previous owner had mentioned something about using a fuel pump and new intake and picking up some decent numbers. I think he said somewhere around 15hp compared to a 6hp.

Another random question. Is it possible to get 35+hp out of a typical 6hp B&S? If so how?

I'm not sure I understand what you're saying when you say "break" in the tubing.
I'm going to have t go through my favorites to see if they even have it that small. I know another way is to get it rolled and then weld the seam. I haven't dealt with this small of tubing for a long time when I made an exhaust for my CR50F.

 

[danssoslow]

From reading what the flathead builders on 4cycle have posted, I'd have to say no. That's big bore billet block territory. By design, ohv engines will make more power than a like sized flathead; and it isn't easy to make 25-30 horse with a small block (~200cc) engine.

 

[OzFab]

The previous owner had mentioned something about using a fuel pump and new intake and picking up some decent numbers. I think he said somewhere around 15hp compared to a 6hp.

Not likely with just those mods, not even if it was force fed...

Another random question. Is it possible to get 35+hp out of a typical 6hp B&S? If so how?

Theoretically, it's possible to get 50hp out of a 5hp B&S. How? Have a look at this thread, it may answer your question

I'm not sure I understand what you're saying when you say "break" in the tubing.

Break as in a section that isn't perforated

I'm going to have t go through my favorites to see if they even have it that small. I know another way is to get it rolled and then weld the seam. I haven't dealt with this small of tubing for a long time when I made an exhaust for my CR50F.

Here's an interesting point: As there's holes all over the tube anyway, the centre perforated pipe doesn't need to be seam welded the full length, only at the ends where it's outside the chamber

 

[bshinn]

welcome aboard tig. i too live in nc,kannapolis to be exact

China Grove here, you playing over in Mooresville at all?

 

[Tig]

You gotta pay to play The right amount of $$$$ will get you anything you want.
Something just didn't sound right about what the PO was saying.

I gatcha Fabroman on the "break"

Good point, true very true it wouldn't be necessary to weld the entire seam.

Thanks guys