backpressure

[HBHRacing]

right. that is where scavenging comes into play. That is the effect of the gasses actualy getting pulled out. The better teh scavenging the better the flow is pulled from the motor. This helps you make more power. Like I said. a lot goes into exhaust therory. I am no where near understanding it all myself. There are several good books on it such as Scientific Design of Exhaust & Intake Systems. like I said. there is a lot to it. you could spend 2 years learing how to just make the very best exhaust setup for your car to make the very most power possible.


Once you understand things like.. pressure pulse, reflection, sonic pulses and wavelength in the exhaust system.. you will be ahead of the game and understand a lo more then you ever thought you would about exhaust.

[3.4orNothing]

Originally posted by HBHRacing:
right. that is where scavenging comes into play. That is the effect of the gasses actualy getting pulled out. The better teh scavenging the better the flow is pulled from the motor. This helps you make more power. Like I said. a lot goes into exhaust therory. I am no where near understanding it all myself. There are several good books on it such as Scientific Design of Exhaust & Intake Systems. like I said. there is a lot to it. you could spend 2 years learing how to just make the very best exhaust setup for your car to make the very most power possible.


Once you understand things like.. pressure pulse, reflection, sonic pulses and wavelength in the exhaust system.. you will be ahead of the game and understand a lo more then you ever thought you would about exhaust.

i believe you

[ReodDai]

Pressure pulses come in big when creating headers. Don't want all hell to break loose at the collector lol.

[camaro_speedemon]

Originally posted by OneQuickV6:
</font><blockquote>quote:</font><hr />Originally posted by camaro_speedemon:
Low end torque does jack crap for racing. Think about it, when you're racing the only time your in low RPMs is when you launch, from then on out, you're staying high up in the revs. You the most power in the RPM range where you spend the most time.

Some of this is true, but not all! Low end torque is very important!! In a 1/4 mile race, you're going to win or lose it in the first half of the track. Your driving skill, suspension setup, and low end power make for a great 1/8th mile time. The second half of the race is just waiting for the line.

The 60' time and 1/8th are very very very important, please do not spread anymore information like this. </font>[/QUOTE]Want me to break out my Smokey Yunick book? I kind of think he knows what he's talking about. You want to have most of your power in the RPM range you use the most. Having more HP in the upper RPM range is more important then having more HP at lower RPMs. You spend 1-2 seconds maybe below 3000RPMs, therefore it only makes sense to have most of your power above 3000 RPMs


Yes, cutting good 60' time is very important to racing, but it mostly shows what kind of launch you did. Higher 60' times generally mean a crappier launch. But I don't see how 1/8th mile times mean anything for low end torque?