I've searched and found bits and pieces, but nothing relevant. My new (unmodded) car pulls nice up to WOT, then it seems to go flat (were talking peddle travel, not RPMS). On my previous turbo cars WOT is where the party started, I'm supposeing mine is having issues? I just want to double check before bringing it in since every car is different in how power is delivered.

Thanks

 

WOT=Wide Open Throttle

WOT is whenever you are at full throttle. What are you trying to refer to when you say WOT? The stock tune on Evos goes very rich up top, so the power flattens out above 5500rpm after a really hard torque hit at 3600rpm.

 

Sorry, I probably should have worded it better.

Performance is fine on the car until you go full throttle. 75% throttle position and it pulls nicely, continue on to 100% and it goes flat. This happens throughout the rev range. Lets just say I find it more effective to pass on the freeway part throttle opposed to full throttle. Best case scenerio is that it's running super rich maybe...

I hope that clarifies the mess I typed up top

 

No, that makes no sense to me. You don't drive with a progressive throttle position anyway. You just hammer the gas and go full boost. That's WOT. WOT is not some point that you eventually reach progressively.

There's no way that 3/4 throttle provides more power than WOT, because you won't be seeing full boost. If you hammer it in gear from 3500rpm at WOT and don't pull as hard as if you're only doing part throttle, then something is seriously wrong with the car. If you have a strange tendency to slowly and progressively apply more throttle as you accelerate through the RPMs, then I suggest changing driving habits - just nail the gas.

 

Ok, well thanks. That pretty much sums up what I was thinking then, something is wrong. I don't usually ease my way into 100% throttle, but have been doing that to judge the differences since there is a distinct drop off from 75%->100% throttle position. My car, at least to my boost gauge's knowledge is reaching full boost at approx 75-80% throttle. Even if I stomp it to the floor on a roll the outcome is the same, more (percieved) tq at <100%

Thanks for the input, I will update this when I find out whats actually going on with it.

 

Hm..let me try to put his words this way,,not sure if it is what he meant, but I think I understand what he's saying..

When you are at 3/4 throttle, the rate at which rpm rises is slower than at WOT.
Hence, you feel as if 3/4 throttle is more powerful than WOT. I know the car pulls very hard at WOT, but the power curve gives you that flattening out feeling.

Is that right???

 

i got the very same feeling when i had a downpipe/cat delete but stock back exhaust. and warrtalon, your wrong. you WILL see full boost at partial throttle. i felt the car a bit torqier at appox 75% throttle than with full throttle.
but when i added the full cat back, that feeling was gone, and it would always feel faster at WOT.

 

Not wrong at all. There's no way you hit full boost immediately with only part throttle. It may eventually climb up to what appears to be full boost, but you will never hit the full peak torque boost spike at 3500-3600rpm without going WOT.

 

i've noticed this with my IX - diminishing returns above 3/4 throttle. boost seems to max out before WOT but i could be wrong.

 

well, ya if you put it that way. i should have said when the car is in the higher rpm area, like 5000 rpm, that it will reach full boost with partial throttle. but your right, max torque is at WOT in the 3500 rpm range.

 

I understand what you're asking.
The ecu goes into closed loop when you go wot. At 75% throttle the ecu is in open loop and controling the afr to a leaner ratio, which will generally give you more power. If you get a tune one of the reasons you get more power is the ratios are as lean as safety allows.