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## Comments

40BREAK-IN SCHEDULE

"During the first 1000 miles...Do not drive over 55 MPH and do not run the engine over 4000 rpm."

25Strange that (on my auto) 55MPH is ~ 2500 RPM.

I did once go over 4000 rpm. Cruising down the freeway at 65mph when g/f decides to see what all the different buttons do - "what's this little button on the shifter do?". I almost had a heart attack.

28If there really is a 55MPH restriction please let me know, although I almost have my 1000 miles so it's too late.

640232,166sounds like a really good deal. enjoy.

12866To be on the safer side I am also trying to keep the car under 55 mph too, though I occassionally do exceed that limit by 4 to 5 mph.

137,7771361. Very high accelerations.

2. Or for climbing steep slopes.

Is there anyone who could throw more light on the same?

13420281,5219Just because a car needs to rev higher does not make it a slower car; it just simply needs to run faster because that's where its power is made.

My car is a 4 cylinder and makes most of it's power above 3,000 rpm, but I can assure you that I can accelerate faster than many 6 cylinder cars.

1741513Horsepower) at 70 mph than 25 mph". That is incorrect. Your car sees more resistance (due to air friction)at 70 mph, but that has nothing to do with the HP your "engine" produces. When you have your car in neutral and "rev" it, it is still producing the same amount of HP, it's just not in gear, so you don't move. Depress your clutch, rev to 6000 rpm and then let go of the clutch. Your engine didn't just start making HP, it just didn't have a means of transferring that power. When an engine is tested to see how much HP it produces, they don't drive at 70 mph to measure it. The engine is placed on it's own and revved across it's rpm range. These values are then recorded (regardless of what gear your in and how many mph you are doing). This is your torque curve. From that curve, they can interpolate your HP at any rpm using the formula I listed previously.

You're also incorrect when you say the greater the rpm, the greater the HP. Look at any mid-80's GM 6 cylinder engine (or others for all I know) and you will see that the torque peaks at about 4000 rpm or so. After that, torque decreases. That is why when you look at engine ratings you see a peak for HP & torque. For instance the Sentra has 145 Hp at 6400 rpm and 136 ft-lbs of Torque at 4800 rpm. That means that at 6400 rpm, the engine is only producing 119 ft-lbs. of torque (power at the crank). I won't even comment on 6-cylinders winning drag races since we all understand that that statement is flawed. The statement is only true - maybe - for short distances. It also depends on the weights of the vehicles.

1122312Have any of you out there made any changes to improve power and handling? I was thinking about adding a K&N Filtercharger but not sure where to get it for a Nissan. Also how about lowering the car and different tires. I am certainly interested in knowing what others out there have done.

Thanks again for all the info and honest feedback.

25I've been getting ~24-26mpg on 95% city driving. That's based on 3900 miles since Sept. 2. Daily routine is drive 2 miles to work, and 2 miles to home.

BTW, enough snow to cover the roads fell yesterday where I live. The tires do blow chunks, but the ABS works well.

2