94 Impala Ss Owners Manual
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Interesting topic.since I have one. It is SO easy to bump HP output to over 300hp (flywheel) on these cars. My car, a '96, puts out 240+hp to the wheels.validated by a 248H DynoJet unit. Using a 20% parasitic loss due to drivetrain.that puts it in the 305hp range.
The car also runs 0-60 in 5.69 seconds and the 1/4 mile in 14.3 at 97mph+. (I have the track slips to prove it.) Toss in an aftermarket intake system, gears (I run 3.42s), hi flow mufflers, and good programming in the PCM.and you are in there. GM definitely should NOT have killed this car. As for the 2000 Impala.I'm sorry.but the thing is a FWD Lumina with Impala badging. Supercharging or not.I tend to think it will never get the cult following that the '94-96 cars have. It does keep the resale value up on mine though:-) Dave. Glad to hear from you.
I also own a '96 (it's the Dark Green/Gray Metallic color). Which of the three colors is yours? Mine has the following mods: 3.42 gears, AS&M headers, Borla cat-back exhaust, AS&M cold-air intake (with 1LE elbow), 52mm throttle body, and Hypertech Power Program. It really moves.
I haven't had it to a track or a dyno, but I'm guessing it has 300+ hp at the flywheel, based on what others have told me with similar mods (who have had their cars dynoed). It's a shame they stopped making them, but I have to agree that it really helps the value and preserves the uniqueness of the existing cars. Tim, My car is the common black one.
Evinrude Etec 200 Ho Manual. With your mods, I'm guessing you're in the same ballpark (300hp flywheel.) AS&Ms are the better flowing headers available.but accessing the valvecovers is a pain. They typically add 16hp to the wheels.
The intake and exhaust should pick you up about 20-25hp combined. The larger Throttle bodies haven't impressed me much.and I don't see a lot of gains in them.regardless of marketing. The engine only ingests 'x' amount of air.regardless if the butterflies are slightly larger that the stock unit. The intake itself is a set diameter. The air intake itself helps because it remove bends, baffles, and straightens the airflow.making it less restrictive and thus more HP.
A good modification is swapping the knock sensor module located in the PCM to the Corvette LT4 unit. It basically 'ignores' noise and allows a bit more timing advance.making more HP. Its cheap $28 I think and works. The Hypertech is a good unit to calibrate speedos, etc.but check out the Ed Wright Programming.you'll pick up 8-10hp alone, and the car will come to life. I run a competitor, Z-Industries, and am very happy.but the guy is difficult to get a hold of. Ed is service oriented and excellent.
$250-$300 I think.not cheap.but well worth it! Hope this helps a bit. Thanks for the info. You're right about the AS&M headers being a pain. I'm not looking forward to the day that I have to get to the valve covers. I've been reading some of the Impala SS sites and I agree about the 52mm TB and the Hypertech.
My car had all that stuff on it when I bought it 2.5 months ago, so I didn't really have a choice in mods. The Hypertech does have the header module, which from what I can tell, does add a bit of power. I'm assuming it does so because it corrects for the lean condition that headers create.
I'll look into the LT4 knock sensor module. Sounds like a winner especially for the price. How hard is it to change out. Although my car has 18,300 miles, my engine only has about 5,000 miles on it (it was replaced under warranty for a knocking sound before I bought it). I've been taking it easy on the engine since I know it's fairly new, but I figure it must be broken in by now. The Knock Sensor module is a piece of cake to change. The PCM sits under the stock airbox.if you have an aftermarket, chances are the PCM is flipped up and mounted to the fenderwell.
Detach it.flip it over.and undo the 2 (I think its 2) screws that secure a small metal cover. Pop out the module.pop in the new one.done. As for the headers.the PCM is always watching the fuel mixture.adjusting it endlessly. Headers should have little effect on a 'lean' condition since the PCM will adjust mixture continuously. You want to run a little 'lean' anyway. At WOT, the PCM kicks in a much richer mix to burn, however. With 5K miles on your engine.its 'broken' in.and will only get faster with more mileage:-).
My car, bought new by me.has 48K miles (bought 12/95) and gets faster as the miles click! Thanks for the info on the knock sensor module install. I hope you're right about the engine getting faster.
It's already a pretty wild beaSSt as it is. I'm in Northern New Mexico, by the way, altitude of 7300 ft. (which means I'm minus 15-20% of the power, but so is everyone else here), and my car still feels damn strong. When I bought it in Atlanta, GA and drove it back it felt very noticeably stronger at lower altitude. The difference in pressure is right around 3 psi less than sea level (which is like installing an intercooled mini-supercharger relative to here). I was amazed at how easy it was to pass. The car went from 65 to 90 in what felt like zero seconds.
I'm hoping to get back to the low altitudes some day (my family is in Ohio). Doesn't anyone want to keep their cars in essentially original equipment status? Seems like a very high percentage of '94-'96 Impala SS owners go to a lot of time and expense to modify their vehicles. If people want Corvette or Viper performance, then buy a Corvette or Viper.
Nothing makes me sadder than to see auto shows or just vehicles on street that are classic cars. Then when you go up and talk with the owner you find out that all of the major systems have been replaced.