method wrote:Well if it dropps off at 3k its hardly flat, i was meaning flat as in stays flat until redline. Flat torque curve to redline = good fun to drive like MR2SIK's one. Just keeps pulling and nice and drivable. IMOH
Some people like peaky torque curvs and cars that make no power under 6krpm
You never said anything about what revs to go to, or where the redline is. His torque was petering off well before redline, as any would be. A torque curve that was literally flat forever would be perfect (because it would provide infinite power), would be nice - but not really possible. The best power curve to have is roughly (there is more to it really) the one that has the highest average through the "used" rev range. In my car for example that'd be the average from say 4500rpm to 7000rpm. Below there its a bit bumpy (more to do with lack of boost controller at the time than anything else) but from there on the power just builds strong and hard. Once the torque is up, it holds pretty strong up until redline.
The torque line on my graph looks a lot more dramatic than MRSik's one, but thats more because the dyno goes right down to lower revs (1500rpm is before most turbos are really doing anything, which exaggerates the "lag" of any turbo car), and the fact dynapack software focusses into the area of the torque graph which the car hits, instead of starting at zero which makes the thing look a LOT flatter than it really is. Mine:
