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Originally Posted by Topless
Add HP or performance? There is a difference. A bunch of lap dogs got together and calculated the relative performance gains on a local 90 second race track. It looked something like this:
Add quality chip/headers/exhaust, $1800 cost, 20 hp gain, shave 3/10ths/lap.
Add 3.4L motor (100hp), $10k cost, shave 2 seconds/lap.
Remove 400 lbs, $0, shave 4 seconds/lap.
Add comp tires and weekend performance driving school, $1000 cost, shave 10 seconds per lap.
Choose wisely.
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Good points, topless
In street driving, I don't know if you'd notice an extra 10-20 HP very often but a bump in torque--say 10-15/ft/lb would be noticeable in the 2.5L and appreciated.
At an Autox or DE, the extra HP might be helpful getting your speed up just a bit, but better brakes, stickier tires and more practice will get you around the course faster for a lot less money.