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I've been looking at a lot of dyno charts lately on Supra boards, Z boards, and hybridz.org and it seems like when people tune their Z's or Supra's, they are going for the absolute highest peak HP instead of aiming for a broad torque curve. Why is this? While it's great to say that you have 600 HP at 7500 rpm, they may have been better off by tuning the engine for more low end torque and having a broad, flat, more usable HP curve. For the engines with really "peaky" hp curves, they seem to lack HP all the way up until 6000 or so RPM, and then it peaks and goes down. That's great for bragging rights, but the car may actually be slower than if they tuned it for a more broad HP curve. It seems to me that if you go for the higher *average* HP throughout the RPM range you are going to use, then the car will be faster. If you wonder why the V8's do so well in the 1/4 mile, take a look at the HP curve for some of the engines they have. They have very usable HP from 2500 rpm all the way up to 5500 rpm or so. While the power they deliver doesn't peak as high as the more radically tuned engines, the average HP they put out over their RPM range is higher. So when looking at dyno charts, the engine that peaks at 600 hp may sound more impressive, but the engine that has more area under the HP curve will accelerate the car faster. Has anyone on here with a modded TT ever tried to maximize the low end hp the engine makes instead of just making more HP higher up in the rpm range? Or does the design of the engine just lend itself to high RPM operation?
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