Kevin M. Keller said:
Proprer suspension mods can improve handling, but your typical cut springs on stock dampers that "ricers" often do does make a car handle worse.
Proper mods might. But, let's face it, it's beyond the ability of the average Joe to outengineer Honda, etc on it. Sure a stock suspension is a compromise, but IIRC, those little Civics already outhandle most drivers anyway. Most cars today pretty much do.
Putting a big muffler on a stock exhaust does nothing, but a proper cat-back system does add HP, as does an intake.
Not that much though.
The SPC has dyno
tested several intakes, and found a 4-8 HP gain on a Saturn motor.
4 - 8 HP at the wheels on a Saturn motor is just barely enough to make it out of the uncertainty of the average dyno. Chassis dynos aren't spectacularly accurate, assuming they're even calibrated right. Now, a calibrated engine dyno - that's different. But 4 - 8 HP at the flywheel is barely worth the effort - it hardly is at the wheels either.
I wouldn't be surprised if normal variation from temperature, air pressure, etc is that much...
The manufacturer designed the suspension for one set of parameters. On economy cars, that is usually comfort when getting groceries. Aftermarket companies design suspensions for a very different set of parameters. I have chosen to sacrifice some comfort to make the car corner better.
But, the fact remains, on a skidpad, even a cheap economy car like a Kia pulls quite well. IIRC, they can outhandle some sports cars of 20-30 years ago...
In any case, the chances of the average ricer boy being able to make a car handle better than a group of engineers at Detroit/Tokyo/Stugartt, is pretty slim. At least on a newer car.
Several SPC members have indeed done this. the gains are not as much from the air being cooler, but from the opening up of the intake and allowing more air into the engine. Again, 4-8 HP gain on a Saturn.
4-8 hp is barely worth the hassle at the smogger station or even the money on such a system. In any case, if a system's being advertised as 'cold air' induction, is it REALLY bringing in cooler air than a stock system? That's my big question, and I'm guessing the answer is 'no'. So, what you're seeing is airflow improvements...
This reminds me of a test in some mag of headers for some Honda (toyota?) motor. The best aftermarket one was 2HP better than the stock. I'm guessing that those little buzzbomb motors are so optimized from the factory that there's really not much room for improvement without making MAJOR changes...