Quote:
Originally Posted by e60.deluxe
the torque curve and the redline say so. at peak HP the Civic Si makes about 130lb-ft of torque @ 7800RPM. if we increase this by 40, now we plug in the formula. 7800RPMx170Lb-Ft/5252=260HP.
the only way around this is to change this is to change the redline, the torque curve, or both.
for the car to rev up to 8200 and only make 200HP, torque NEAR redline cant be much more than about 140lb-ft. you have to understand that HP comes from RPM AND TQ. you cant just up one and expect nothing else to change.
|
im not sure what the torque curve looks like, but the peak torque should be at least 500 rpms lower than the peak hp i would think.. yes i just learned tq and rpm = hp, thus meaning hp is a a measure of overall capability, just like watts is volts x amps, but im still a noob to cars, and the hp vs tq seems to stump me..
i found a really awsome article on how torque is more important than hp, and i emailed the guy and asked him a few questions, and this is what i got back.. "im sure your not stupid, but you look very ignorant typing how you do, blah blah blah" and he gave me a 1 sentence answer ending with "..it appears you already knew this, but chose to ignore it" or something like that.. long story short, i welcomed him to the 21st century, the internet, speed typing, and guess that he was at least 40 years old, probably more like 50, and he emails me back saying hes 65.. what an *******..
Quote:
Originally Posted by KingMarineM16a4
Science says. Look at the cars that have 200hp/tq or more out of 4 cylinders.
Sentra 2.5 liter, 6.5 redline
GTi, 2.0 Turbo, 6.5 redline
MS3, 2.3 turbo, 6.5 redline
STi, 2.5 bigger turbo, 7 redline(bigger than the tiny MS3 and GTi turbos)
EVO, 2.0 bigger turbo, 7 redline(bigger than the tiny MS3 and GTi turbos)
Solstice GXP/Sky redline, 2.0 slightly bigger turbo, 6.5 redline
And in a league of their own...
Civic Si/RSX-S, 2.0, 8k redline, no tq, 200hp
S2000, 2.0/2.2 240hp, 8k/9k, redline no tq
In a engine you are pretty much going to get hp/tq pretty equally unless you up the revs thus sacrificing tq down low. The way to up the HP, and keep the tq is to go force induction especially if you plan on raising the redline.
N/A with a high rev limiter will not have tq.
Look at Ferrari's, Hondas, F1 cars etc.
|
some of the cars you listed have under 200 tq.. but ya, i guess it gets quite complex when you talk about torque and hp curves, and what causes them? let me just ask this, can gear ratios change torque/hp curves? im guessing no, they can only change the
amount of torque (but not hp).. if torque is sacrificed with high rpms, then what are you gaining when the rpms go up? torque and rpms determine hp, but if you take torque away and add more rpms, arent you basically doing nothing or very little? also, if torque is sacrificed at high rpms, then why dont we have torque at like 4000 rpms? btw i noticed my current car which has an insane amount of torque, has a 5300 redline (1997 mercury cougar xr7 @ 290 tq)..