Getting better performance out of my self propelled lawn mower

[alfa147x]

Originally posted by: angry hampster

Originally posted by: alfa147x

Originally posted by: angry hampster
Keep us updated with pictures. Please give the mower a new paint job as well.

HELL YEAH! I just dont want to spend out the wazzooo

and btw i rather spend money on performance then looks

It's a lawn mower. I'm not really sure what you're expecting. :laugh:

money = 10c

 

[spidey07]

Keep the bore the same. What you need is more air/fuel in and out.

Bigger carb, cooler plug, no muffler and you should be good to go.

 

[alfa147x]

Originally posted by: spidey07
Keep the bore the same. What you need is more air/fuel in and out.

Bigger carb, cooler plug, no muffler and you should be good to go.

im pulling it apart tomorrow to see what im working with, why a cooler plug? bigger carb = more air\fuel? what about back pressure from the muffler? also can some one tell me why i need back pressure


thanks!

 

[spidey07]

Cooler plug because you'll have more combustion (more air/fuel). Bigger carb = bigger throttle body = more air/fuel. What I'm gathering is a single cylinder motor.

I'm by no means an expert on this stuff, but on simple motors like this backpressure isn't your concern...the motor is a big pump.

 

[Xyclone]

Originally posted by: nkgreen
Put some 22s on it.

I saw a golf cart in Newport Beach with huge chrome rims. I should have taken a pic.

 

[angry hampster]

Originally posted by: alfa147x


im pulling it apart tomorrow to see what im working with, why a cooler plug? bigger carb = more air\fuel? what about back pressure from the muffler? also can some one tell me why i need back pressure


thanks!

The whole backpressure thing is largely a myth and does not affect a naturally aspirated engine at all. (In most circumstances) Just yank the muffler off and ride the sucker down the street. Yeah, I know it's a walk-behind mower. Just squat down on top of it, or ride on a dolly/skateboard/office chair behind it.

 

[Colt45]

small 4-strokes are hopeless... find a beat down snowmobile with a 2cyl 2 stroke for $25 or something.

 

[alfa147x]

Originally posted by: Colt45
small 4-strokes are hopeless... find a beat down snowmobile with a 2cyl 2 stroke for $25 or something.

in georgia ?

 

[Raduque]

Too bad it's not a riding mower, or you could to this to it.

 

[Demon-Xanth]

Note:
http://www.youtube.com/watch?v...3WbiS0&feature=related

...V8 chainsaw. Why not a V8 lawnmower?

 

[Black88GTA]

Originally posted by: spidey07
Cooler plug because you'll have more combustion (more air/fuel). Bigger carb = bigger throttle body = more air/fuel. What I'm gathering is a single cylinder motor.

I'm by no means an expert on this stuff, but on simple motors like this backpressure isn't your concern...the motor is a big pump.

Originally posted by: angry hampster

The whole backpressure thing is largely a myth and does not affect a naturally aspirated engine at all. (In most circumstances) Just yank the muffler off and ride the sucker down the street. Yeah, I know it's a walk-behind mower. Just squat down on top of it, or ride on a dolly/skateboard/office chair behind it.

Just a small correction...2-stroke motors won't run right without the proper exhaust pipe. Changing the characteristics of the pipe (shortening / lengthening it, or removing it completely) will alter the effective powerband of the engine, and will probably give you lots more noise, and lots less power (an un-muffled 2 stroke sounds like absolute shit, btw)

4 stroke motors are not as dependent on exhaust characteristics though...I'm assuming your mower is a 4 stroke (most are) but prepare for it to be obnoxiously loud if you take the muffler off. That little box does a lot more to reduce noise from that small engine than you might think.

 

[alfa147x]

Originally posted by: Black88GTA

Originally posted by: spidey07
Cooler plug because you'll have more combustion (more air/fuel). Bigger carb = bigger throttle body = more air/fuel. What I'm gathering is a single cylinder motor.

I'm by no means an expert on this stuff, but on simple motors like this backpressure isn't your concern...the motor is a big pump.

Originally posted by: angry hampster

The whole backpressure thing is largely a myth and does not affect a naturally aspirated engine at all. (In most circumstances) Just yank the muffler off and ride the sucker down the street. Yeah, I know it's a walk-behind mower. Just squat down on top of it, or ride on a dolly/skateboard/office chair behind it.

Just a small correction...2-stroke motors won't run right without the proper exhaust pipe. Changing the characteristics of the pipe (shortening / lengthening it, or removing it completely) will alter the effective powerband of the engine, and will probably give you lots more noise, and lots less power (an un-muffled 2 stroke sounds like absolute shit, btw)

4 stroke motors are not as dependent on exhaust characteristics though...I'm assuming your mower is a 4 stroke (most are) but prepare for it to be obnoxiously loud if you take the muffler off. That little box does a lot more to reduce noise from that small engine than you might think.

Im planning for a surprise when i take the exhaust off, btw its a 4 stroke

 

[Slew Foot]

4 or 5 R-Type stickers should do the trick

 

[zixxer]

Originally posted by: alfa147x

Originally posted by: angry hampster
Just pull off the muffler and open up their air intake element to make it more free flowing. No sense in dumping $$$ into a mower. Your neighbors will hate you btw. :laugh:

is it really that loud? they wont kill me if i try it out, one is a red neck the other is rebuilding a mustang thats loud as fuck w\o its exhaust

also would this harm the engine at all?

Buy a case of beer and invite them over. I bet you'll have a badass mower in no time...

 

[alfa147x]

Originally posted by: zixxer

Originally posted by: alfa147x

Originally posted by: angry hampster
Just pull off the muffler and open up their air intake element to make it more free flowing. No sense in dumping $$$ into a mower. Your neighbors will hate you btw. :laugh:

is it really that loud? they wont kill me if i try it out, one is a red neck the other is rebuilding a mustang thats loud as fuck w\o its exhaust

also would this harm the engine at all?

Buy a case of beer and invite them over. I bet you'll have a badass mower in no time...

im 18...