2 stroke supercharger dyno vs. n/a [pictures] stupid n00bs

[kwong2001]

So over at RCU, all the n00bs were telling me how wrong i was to think the supercharger for 2 strokes don't work. EVEN after they showed a picture of RC Driver's dyno graph. I proved them wrong by so much.

The graph they presented showed a "significant" change in the power. It's much more linear. Or does it? A .07hp change does NOT look like that. So I asked what the scale was on the graph, never got an answer. Then I basically told them it's not going to be THAT significant, they didn't believe that either.

So then I surfed to the manufacturer's website, and went to their FAQ about their supercharger. It said on the first question,

What is the Supercharger?

Our Supercharger is a device that will force air into your engines carburetor at an increased pressure and rate. This process will enhance the atomization of the fuel and increase the pressure in the engines crank shaft area. When the proper ports open (depending on type of engine) the increase pressure rushes into the piston chamber, helping again to keep the fuel atomized and pushing out the exhausted gases filling the piston chamber with a better mix of fuel.

http://www.mppa.biz/?faqs/supercharger.html

While you must read between the lines, they basically said, more or less, what everyone has been saying. Pressure just goes out the exhaust port and adds more fuel pressure.

So anyone who buys the $160 MPAA supercharger is buying nothing more than an overpriced fuel pump. It's just bad when that's coming from the manufacturer.

 

[Lessen]

"depending on type of engine"

LMAO!

 

[kwong2001]

haha, i didn't even notice that part....man it's bad when the manufacturer says their product doesn't work

 

[nitrohead3000]

Advice to the wise should be sufficent!! You proved your point beyond a doubt yesterday .07 horsepower increase!! It is a waste of money to buy that supercharger you could get more of a power increase by buying a factory modified motor, or sending your motor off and having it modified. NOOBIES have to go to the school of hard knocks before they learn.

 

[Plaidfish]

hey .07 HP might just help me win the next race....and if I don't paint my body I can save 2 grams....and then I can cut 1 mm off of each tread of my Bowties and loose another gram.....and if I fart before I race I can get rid of all the extra tension from where they're talkin poop from and get a better throttle response.......manufacturers are getting Lame lately.....Let's put out product with out any real R & D or purpose for that matter.......Corporations Lie.....

 

[kwong2001]

Damnit, those bastards couldn't follow the rules so they locked the thread. Anyhoo, I found another thing last night, this one is even better.

If you look at the graph, look at lower rpm portion of it. Do you notice the trend of both the torque, and hp nearly the same? I can't tell for sure since i can't see the graph clearly, but i'll bet the n/a makes more power in certain places and can at least match the supercharger. If the supercharger is getting more air and fuel in the combustion chamber at time of ignition compared to n/a, more power SHOULD be made. But each were probably making about the same power throughout almost the entire powerband.

It isn't until probably the last 1000-2000rpm does the n/a start dropping on power. That proves without a doubt that it's just acting as a fuel pump. The n/a was most likely starving for fuel on the VERY top end and running ever so lean.

edit: I chopped the guy's more clearer picture of the dyno graph. It looks like they were making around 2.65hp with the s/c and around 2.58hp n/a. So it really isn't even close to a gain one percent more power, more like half a percent. But the drop in HP is so insignificant to begin with.

Also, they had to have been using a big block. Now you gotta wonder what would happen if you ran it in a small block?

 

[madnking]

my friend put one his .25 HPI motor and it had no noticable increase in power. Then he took it off. I think its a total waste on money.

 

[Rolex]

haha, i didn't even notice that part....man it's bad when the manufacturer says their product doesn't work

FINALLY !!!!! TRUTH in advertising !!!

 

[bigfreak]

I think everyone is reading the graph wrong. The top set of lines are BHP (red green). They run identical to each other. the bottom two lines are torque. there isn't any difference!!! waste of money!!