I have a 94 yamaha timberwolf, and i need a way to get more low end power from it!!!! On some steep hills, i would just totally run out of power, and have to reverse down. It freaks me out! What is the best way to get more low end power? Would it be from a pipe, if so, can u tell me which one? Or what about that K&N power kit? Any comments will be greatly appreciated[img]i/expressions/face-icon-small-smile.gif[/img]

THANKS

 

The best low end power you can get will be with your stock pipe.

Four strokes need back pressure - especially utility type quads with auto trans (no clutch to get the rpm's up when you need 'em).

An aftermarket pipe - any of them - will increase the diameter of the header and will have less backpressure. This will gain you more top end hp (maybe), but at the expense of low end torque.

The only way to increase torque - which is what you need to climb hills - is:

1. Increase displacement with a bore kit.

2. Increase compression with a high comp piston. Going to 10.5:1 will allow you to still run premium pump fuel, but will give you about a 5% boost in torque.

 

sorry to rain on your parade pam but my friend has a 300ex and he got a larger diameter pipe, and increased power ALOT!

 

<< but my friend has a 300ex and he got a larger diameter pipe, and increased power ALOT! >>



I have an idea, why not go back and re-read my answer - thoroughly.

Like I said:



<< Four strokes need back pressure - especially utility type quads with auto trans >>



The 300EX is NOT an auto tranny.



<< An aftermarket pipe - any of them - will increase the diameter of the header and will have less backpressure. This will gain you more top end hp (maybe), but at the expense of low end torque. >>



You are confusing horsepower with torque. The question Bix 4x4 asked was:



<< What is the best way to get more low end power? >>



And I answered his question.

If the question were about a 300EX (a sport quad, not a ute!), and the query were about how to get more speed and throttle response, I would have said to install a larger diameter pipe and more free-flowing muffler (but still something with some back pressure).

Since the question was NOT about a 300EX, but a Timberwolf, which we have done testing on, and which I KNOW has the correct diameter headpipe STOCK, then my answer is different.

And people wonder why I don't spend more time answering questions here.

Jeeze.

 

a quality after market pipe will increse low end ...dont listen to that blah blah.....

 

Biggy,

Hello, let me introduce myself. I am Pam Falcioni, I have worked in the industry for 10 years at a four stroke performance shop. I answer tech questions for a living - for regular people and for pro racers - Lance Smail, Cory Ellis, Rick Johnson, Scott Russell and Scott Summers are a few of my customers. I also work with the OEM's on special R&amp;D projects.

We have a dyno. We test quads. We build pipes for quads and dirt bikes. We build other performance parts for quads and dirt bikes - strokers, bore kits, cams, carbs, valve springs etc, etc. We are currently working on Cory Ellis' Laeger chassied YZF 426 which we build to a 440 with a stroker.

We also built the winning bikes for the four stroke nationals last year. Don't even ask how many other races we've won - I don't want to waste my time trying to remember all of them.

I know my stuff. What I told Big 4x4 is not blah blah blah.

There is no argument here. It's scientifically proven - sorry guys - I really don't care what you THINK - study engine dynamics - work with a dyno, test different pipes and different models. Okay, NOW you have an opinion worth listening to!

I respect anyone's studious, well reasoned arguements - but just because you say it, or have read it in a magazine - it just doesn't make it so.

Remember, I am NOT trying to sell anyting to Big 4x4 - I am telling him to save his money - a pipe will not give him the type of power he wants.

 

thanks for all the comments, but do you think that a 5 percent increase in torque will allow me to make it up steeper hills without running out of power? thanks again

 

Ill have to go with Pan on this one. I installed a FMF Powercore IV-2 pipe on my 300EX. (not helping with this question but anyway) It lost backpressure severely, and lost low end accordingly. My motor has been built (Wiseco, Webcam, Porting, Oversize Valves, Springs, Hardface Rockers, Barnett Clutch, Hinson Basket). I would take Pams advice, and screw getting a pipe, and bump up your compression. It helps the most throughout. IMO.

 

thanks for all the reply's!!! and for all the help. Does it cost a lot to pump up my compression? cuz i dont have a lot of money to spend on this atv. Thanks.......

 

Pam knows what she's talking about...Back when I rode fourstrokes, they helped me build a bad, bad, 300ex. That was before I realized how much fun 2 strokes were!!. The best way to get power out of a 4-stroke? Pull it with a 250R.