4AGE Tuning Options

[johntramp]

By the way the O2 sensor isnt for lowering emissions. Its for getting the mixture semi correct considering the fuel, weight of the car, use of throttle, age of engine, etc.

narrow band o2 sensors are designed to measure stoichiometric air fuel ratios to allow cat converters to work efficiently

[pc]

You don't necessarily need a dyno to check changes/improvements.
... other stuff

Ken
Ham
021 408 863

I like to get a picture of the torque curve also. A car may accelerate up to 7000 rpm in the same time, but the torque curve may be quite different. Altho you could video it and compare side by side videos on a computer, it's nowhere near as good as doing one dyno run and having a graph on paper. A $50 dyno run is worth it.

[Caveman]

You don't necessarily need a dyno to check changes/improvements.
... other stuff

Ken
Ham
021 408 863

I like to get a picture of the torque curve also. A car may accelerate up to 7000 rpm in the same time, but the torque curve may be quite different. Altho you could video it and compare side by side videos on a computer, it's nowhere near as good as doing one dyno run and having a graph on paper. A $50 dyno run is worth it.

doesnt matter when you rev out to 7500+ in every gear

[Stealer Of Souls]

You don't necessarily need a dyno to check changes/improvements.
... other stuff
Ken
Ham
021 408 863

I like to get a picture of the torque curve also. A car may accelerate up to 7000 rpm in the same time, but the torque curve may be quite different. Altho you could video it and compare side by side videos on a computer, it's nowhere near as good as doing one dyno run and having a graph on paper. A $50 dyno run is worth it.

If the car takes the same amount of time to rev to the top of each gear (even if the torque curve is different) after a mod, then have you really improved performance?

[pc]

You don't necessarily need a dyno to check changes/improvements.
... other stuff

Ken
Ham
021 408 863

I like to get a picture of the torque curve also. A car may accelerate up to 7000 rpm in the same time, but the torque curve may be quite different. Altho you could video it and compare side by side videos on a computer, it's nowhere near as good as doing one dyno run and having a graph on paper. A $50 dyno run is worth it.

doesnt matter when you rev out to 7500+ in every gear

Sure it does. That means you want your peak torque to be in the 5000 - 7500rpm range... cos thats where you'll be when you change gear.

[Cahuna]

In a rally car torque is a huge difference. If you have power between 5500 and 7500 rpm then you have to keep the revs in that range, otherwise performance suffers. A 4500 to 7500 powerband is far more usable, even if peak power is slightly less. This is because in a rally car you're not always in the right gear for the corner, unlike on a circuit where you know exactly what every corner does and choose the correct gear every time. On Tauranga Rally I often found myself changing down a gear because the car didn't have enough torque to pull the gear I wanted, even though changing down meant revving the nuts off it.

Mind you, the close-ratio box I have (still) on the way will also help things significantly...