How can I increase the horsepower
A simple question with a not-so-simple answer. Engines are designed to last a long time "the way they are." Anythign you do to in crease hp will reduce the life of the engine.
That said, the punk way to get more hp is to add a nitrous kit. Nitous is nitorgen and oxygen. Nitrogen is an inert gas but it gets hot and takes away some heat out the exhaust. It is the oxygen in nitous oxide that helps the fuel burn more efficoiently,thus more hp. Your engine may not be able to pbhysically handle the increased torque without breaking. Aluminum pistons melt easily and nitrous in excess will do that to them. (Watch episodes of Street Outlaws" to see nitorus motors destroying themselves.)
Another way to achieve more hp is to install a supercharger and klimnit the boost to 6 psi on a stock motor. Beyond that, a "boosted" engine requires a lower compression ratio in order to handle all the increased amounts of air and fuel without destroying itself. Air-boosted engines require proportionally increased amounts of fuel to maintain "stoichiometric" air/fuel ratios. That means larger fuel injectors, a larger fuel pump, fuel pressure regulator, cooler spark plugs, and a computer to figure out what to do with it all.
Turbocharged engines have exhaust valve timing retarded by about 20 degrees to prevent "reversion." A larger exhaust sytem is required to exhaust the increases amount of "products of combustion" created by all that fuel and air. Then, too, adiabatic heating of the (now) compressed air requires cooling before entering the engine. Air molecules are farther apart when hot (less dense) so cooling the air delivers more O2 per unit volume, necessitating an intercooler for that purpose.
Hopped up turbo cars often run on E85. Alcohol has less energy so it won't take you as gas, but it burns MUCH cooler so you can crank up the boost! Guys are running 35-40 psi on the streets with E85 and making 700+ hp in some cases. But then, they have 10-25k invested and the engine is only some of that. Drive trains have to be strengthened.
Peformance engines are designed to handle the torque they make. Stock rods, cranks and pistons *may* hold together but beefed up aftermarket items are the way to go for increased reliability. A "stand alone" engine computer is required if you have any inclination of ruling the streets in your town or even being a contender.
There is, obvioulsy, a lot to know before you "add horsepower."
Visit a speed shop that has a dynomometer. They can advise you best. (They aren't serious if they don't have a dyno.) And don't listen to braggers online. They are not much help. The best way is to understand the physics of 4-cycle engines. After that, have at it and be prepared to spend a lot of money for parts and tickets! For me, the fun was in the learning!
Mar 03, 2015 |
Cars & Trucks