Powerband and Peak HP, which mod/part cominations makes the difference??
09-09-08, 01:42 PM
#1
Powerband and Peak HP, which mod/part cominations makes the difference??
I know some people aim for different things with their FDs. Can someone/everyone please explain to me what type of modifications makes the difference between a huge power band and big numbers in our cars??
The reason I ask is to see where my focus should be, but at the same time make this thread a gauge for people who look for different goals.
thanks
The reason I ask is to see where my focus should be, but at the same time make this thread a gauge for people who look for different goals.
thanks
09-09-08, 08:01 PM
#5
since the FD is a turbocharged car. the best way to initially look at what turbo(s) make a good powerband is to educate yourself on reading compressor maps for turbos.
the "bolt-on" mods we put on our cars just help keep the efficiency up.
tuning works wonders
the "bolt-on" mods we put on our cars just help keep the efficiency up.
tuning works wonders
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09-09-08, 11:27 PM
#8
Mod/part combo for "powerband"? Whatever gives you the most torque across the RPM range you plan on driving. That means boost as early in the rev range as you can get it, and as long as you can keep it. For a street driven car, I'd venture to say that RPM range would be 1000-6000 RPM (depends on your shifting habits). Think a smaller single turbo or sequential twins. That probably means well performing intake, open exhaust, and definitely means a turbo sized appropriately for your requirements, and a responsive wastegate/turbo control system (which opens the wastegate as late as possible). I don't like to trust the plug-n-play ECUs since you don't know what they are doing (nor can you change them) unless you're monitoring things (A/F ratio, timing, injector duty)... that's what tuners are for, since every car is different.
On the other hand, big turbos make big torque up top (and hence even bigger HP), but you will sacrifice boost threshold (lowest RPM for boost) and low end thrust. It's up to you
On the other hand, big turbos make big torque up top (and hence even bigger HP), but you will sacrifice boost threshold (lowest RPM for boost) and low end thrust. It's up to you
Last edited by mdpalmer; 09-09-08 at 11:29 PM.
09-10-08, 12:10 AM
#9
compressor maps are graphs that display the efficiency of a particular turbo at a specific pressure versus the flow rate.
this map indicates what the line of surge will be at.
where its maximum wheel speed is.
where it will "choke" itself, meaning where it will stop sucking in more air once the air reaches sonic velocity. at which point is when the turbo will just be heating the intake temps
this map indicates what the line of surge will be at.
where its maximum wheel speed is.
where it will "choke" itself, meaning where it will stop sucking in more air once the air reaches sonic velocity. at which point is when the turbo will just be heating the intake temps
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