What full exhaust system do you think is best for the 300ex...I'm looking for something that adds hp and more power...I was looking into the DMC and the supertrapp...what do you guys think?

 

What i've hear is the top system's for the 300's are the DMC, Yoshi, Suppertrapp 3 inch (not internal disk), WB E-Series, and about any pipe from a major engine builder (like Curtus Spark's Racing)

 

<< What full exhaust system do you think is best for the 300ex...I'm looking for something that adds hp and more power >>


hmmmm...I could of sworn that I heard somewhere that HP was somehow linked to power. I'm not sure where though...hmmmmmm

 

300exlittleman -

WATCH THE CURSE WORDS!

 

Actually HP is a measure of speed, and Torque is a measure how much you can pull, so technically, his question wasn't wrong.

 

<< it is suppose to be ...hp, just more power... you dont have to be a ???????? about an error >>

And you don't have to be a di@#head for not taking a joke.


<< Actually HP is a measure of speed, and Torque is a measure how much you can pull, so technically, his question wasn't wrong. >>


250rampage, I think you better check your facts.
(Torque x Engine speed) / 5,252 = Horsepower
Horsepower is more of how much you can pull and Torque is how fast you can go, they are both intertwined though. If you want to peel the wheels off the line you want HP if you want to be screamin at 10,000 RPMs you want torque.

Here is another way horsepower could be directly measured. Say you have a horse hitched to a plow. In the hitch is a spring scale (like a fish scale). The horse pulls the plow one foot every second and you see 550 pounds on the scale. That would be one horsepower.

A simpler way to understand the relationship between torque and horsepower, and how to calculate it, may be as follows;

Torque is tangential force * distance from the fulcrum. Power can be defined as work (force over distance) per unit time.

Applying 1 lb of force 1 ft from the fulcrum for a complete revolution will lead to;

W = F*2*pi*r = 1 lb * 2*pi * 1 ft = 2*pi lb-ft = 6.283 lb-ft

If it takes one minute to complete this revolution, then the power is;

P = W / time = 6.283 lb-ft / min

1 hp is defined as 550 lb-ft / s = 33,000 lb-ft / min

Therefore, applying 1 lb-ft of torque in one minute (1 rpm) = [6.283 lb-ft / min] / [33,000 lb-ft / min] = 1 / 5252 of 1 hp.

From this you can then calculate the number of hp from any given torque and rpm:

hp = torque (lb-ft) * rpm / 5252
Horsepower vs. Torque

 

Torque is what will peel your tires and HP is what will allow you sustain speed.

 

I don't think torque has anything to do with high RPM's if it does than how come disels have TONS of torque and they only rev to like 3500 RPM.

 

2fiftyX...
last time i checked ..you got things backwards...

 

PismoGuy400, your absolutly right, I did have that backwards. [img]i/expressions/face-icon-small-blush.gif[/img]

<< I don't think torque has anything to do with high RPM's if it does than how come disels have TONS of torque and they only rev to like 3500 RPM. >>

I wouldn't say that torque has nothing to do with high RPM's but the reason diesel's have tons of torque is because of a long stroke which makes the RPM's low. The higher the RPM's the greater the Horsepower rating but in turn if you increase the torque you also increase the HP but not as by much as increasing RPM's. (Torque x RPM) / 5,252 = Horsepower. It all has to do with Power to Weight Ratio. The more weight you have the more displacement you need to move that weight. That's why motorcycles with a smaller motor with less displacement can go just as fast as race cars. 2 strokes are faster than 4 strokes of the same displacement because they make more power RPM's.

HP is just a number you get from torque and rpm it does not sustain your speed. When people talk about increacing HP it's the # you get by either increasing the displacement (more piston surface area) to create more torque (or downward force) on your crankshaft or lengthening the rod (the arm that moves the piston up and down) with a longer rod (making a shorter stroke) increasing RPM's. This increases acceleration and top speed. Hence the term bore and stroke.

Also with increasing the rod length from stock it creates more compression on the piston (need high compression piston) in turn creating more torque as well but needing race fuel. Race fuel is less likely to explode for no reason before the spark that's why it's ran in high compression engines. This is also why running too high of an octane gas without a high compression engine is not as efficent because it doesn't have the compression to explode it completely and it is wasted.

Sorry, for the long post I just had to write it all out to make sense of it all.