No discernable difference despite hp/tq differences?

[grenadeshark]

I know the thread title is a bit ambiguous. Let me explain my testing and hopefully someone will shed some light. I did 3 tests.

I have a test track I made. All starts were done exactly the same way. Gear shifts were done at 6k. The horsepower curve got better and better as I did the engine mods.

The test track has a downhill then an uphill run. The pp was equivalent for all these runs.

stage 1 392/492 @4400 6100rpm redline tq3600 rpm 23.872
stage 2 384/535 @3900 6200rpm redline tq3700 rpm 23.876
stage 3 380/557 @3700 6300rpm redline tq3500 rpm 23.861

I would think with these types of horsepower/tq differences, there would be more obvious of a difference. But there isn't. What gives?

Edit: I tried this on two more sets of cars and they had noticeable performance gains from engine upgrades at the same PP levels. It seems my test car was just a boat.

 

[Adrenaline]

Max power is kind of pointless if you always shift before reaching it, don't you think?
What did you do to lower the PP in each test?
Give us an idea of how the track is layed out, how long, tight, shape etc.

 

[grenadeshark]

I went to the pp above and dropped it one to get the rating. So if it was 450, i went till i hit 451 and dropped back one point to 450.

Track is basically a straight line. Downhill then an uphill with a very very light curve. Ill upload a video here in a second.

On most of these cars, it gets near max power right before the finish line and I don't shift up.

Edit. How do you embed on this website?

http://www.youtube.com/watch?v=swSU0DK-ob4

 

[Adrenaline]

I went to the pp above and dropped it one to get the rating. So if it was 450, i went till i hit 451 and dropped back one point to 450.

Track is basically a straight line. Downhill then an uphill with a very very light curve. Ill upload a video here in a second.

On most of these cars, it gets near max power right before the finish line and I don't shift up.

I assume you're referring to the power limiter in the first statement?
In which case, you're capping off the torque you would have gained from installing it, therefore rendering it useless.

Furthermore, since your track sounds like you never have to 'accelerate through the gears' I assume that means you only ever hit 'max torque' once on initial acceleration.

Why would you expect to see any differences under these conditions.

Low end torque is useless, unless you're in that RPM range often enough to use it. This is like complaining that a car with 500 more Torque at 3000rpm isn't any faster around daytona than another car. What good will torque at 3000rpm do, if the duration of the track is spent in the 6000+ rpm range? Like I said, the only advantage would come on initial acceleration, which by the sound of your track happens once and only once, therefor negating any possibility of a 'noticeable' difference throughout lap times.

 

[grenadeshark]

I assume you're referring to the power limiter in the first statement?
In which case, you're capping off the torque you would have gained from installing it, therefore rendering it useless.

Furthermore, since your track sounds like you never have to 'accelerate through the gears' I assume that means you only ever hit 'max torque' once on initial acceleration.

Why would you expect to see any differences under these conditions.

Low end torque is useless, unless you're in that RPM range often enough to use it. This is like complaining that a car with 500 more Torque at 3000rpm isn't any faster around daytona than another car. What good will torque at 3000rpm do, if the duration of the track is spent in the 6000+ rpm range? Like I said, the only advantage would come on initial acceleration, which by the sound of your track happens once and only once, therefor negating any possibility of a 'noticeable' difference throughout lap times.

Gotcha. My testing with 2 other cars produced favorable results. But, I believe that's mostly due to improving the HP curve and it being available at a lower rpm.

Btw, those power numbers listed are @ 427pp for each stage.

 

[Adrenaline]

I'd recommended re-testing at a track like Deep Forest or Trial Mountain.
At these tracks you run into a lot of lower speed corners where that lower RPM torque will be a lot more noticeable both through the corner, as well as accelerating out of it, down the next straight away.