Back pressure is pointless for any reasons other than making an exhuast quieter.I must point out that the car will be much louder than you may think and your plan will hurt low end torque a lot. If you're hell bent on going without a muffler I suggest at least two resonators and large ones at that.
You actually need back pressure. The exhaust is somewhat complicated if you really get into it. Since your car is non turbo I'd suggest not going with those exact plans.
I have a vid of my hatch running just a cat and resonator and dumping just in front of the pass side rear wheel. It sounds good up top but way to loud for city driving.
http://www.youtube.com/watch?v=gqGUAs1hl58
Very true. The only reason an exhaust with no back pressure is worse, is when your engine isn't tuned to make up for the extra flow. In that case, it's your fault, not the exhausts.not true.
Sport Compact CarExhaust backpressure is the enemy of the internal combustion engine. Reducing it makes it easier for exhaust gases to exit the combustion chamber, which reduces the amount of work the engine has to do to shove it out (pumping losses if you're an engineer). Less backpressure also means less leftover exhaust diluting the next intake charge, which means more gas, more oxygen and less heat. All of this means more power.
You don't need a built engine, you just need a correct air fuel mixture. Disconnecting your battery for 15 min or so then reconnecting it and driving your car around will reset the ecu, which will make it have to relearn the air/fuel mixture, at least on hondas. I'm pretty sure that should be enough to take care of the problem.Thing is a lot of us don't have the built engine to deal with a lack of back pressure. If you're building a turbo engine or a high comp race motor go for it. I think most of us would be more likely to have lower comp street motors with mild cams thus the need for some back pressure.
also, I never said increase it. Engines are nothing but air pumps and in order to make power you must pump air in an out as fast as you can. With no back pressure the exhaust gas doesn't flow as well. In some cases, the spent gases enter the combustion chamber again. To see why you need it go unbolt your exhaust. Only in the upper RPM range with all that extra flow will there be power.
Time AttackWith no back pressure the exhaust gas doesn't flow as well. In some cases, the spent gases enter the combustion chamber again.
Flow issues are backpressure.That wont correct flow issues or lack there of not to mention how if you can't burn more air/fuel at the given rpm whats the point.
Dictionary.comback·pres·sure /ˈbækˌprɛʃər/ Pronunciation Key - Show Spelled Pronunciation[bak-presh-er] Pronunciation Key - Show IPA Pronunciation –noun a resistant pressure exerted by liquid or gas against the forward motion or flow of an exhaust or pipe system: Careful control of backpressure ensures an even supply of oil from the well.
back·pres·sure(bāk'prěsh'ər) Pronunciation Key
n. Residual pressure opposing the free flow of a gas or liquid, as in a pipe or an exhaust system.
That would be a result of the exhaust design, not a direct effect of reducing backpressure. You would lose power because of the design, not because you lost backpressure.So explain to me how you loose power in the lower RPM range when you lessen back pressure.
👍 I didn't know that.Just as a sidenote:
Higher flow volume = higher hp
Higher flow velocity = higher tq
Besides, when you are racing, you are going to be in high rpms at all times. If your car makes power only at high rpms, you should drive in a way to keep it there. Don't blame the car, blame the driver.
You own a Honda. You might as well give up on low end torque. You won't have any unless you go for forced induction.Yeah thats true of a racing car. but I drive my car to work and try and shift under 3000 rather than taking it to its 7600rpm cut off. In order to have a wide torque range you need a well designed intake and exhaust system to maintain even flow over the widest range possible.
I think this is supposed to be sarcasm, but yes, you've got the basic idea.yeah I forgot I make zero lb/ft until 324632465134RPM in like 3rd gear when vtec kicks in.
You own a Honda. You might as well give up on low end torque. You won't have any unless you go for forced induction.