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Author Topic: Random question, for 2.0/AT/wagon owners.  (Read 2064 times)

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Offline jeremysdad

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Random question, for 2.0/AT/wagon owners.
« on: September 07, 2013, 07:28:20 PM »
Only if you're running a tach. What RPM are you running at interstate speed (68 mph). (Not sure if anything other than wagons came with 3.55 ratio rear gears.) (Been dealing with Google and my wife's OBD 1.5 '95 Camaro since half-past sun-up, and feeling lazy as far as researching stuff goes.)

Offline 72Wagon

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Re: Random question, for 2.0/AT/wagon owners.
« Reply #1 on: September 09, 2013, 07:56:58 AM »
Not positive, but I believe it is around 3500 to 3700 rpm. Have not had mine out lately so that is just an estimate. their is a formula out there some where that you plug in your tire size, gear ratio and mph and it will give you your rpm.
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Offline 74 PintoWagon

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Offline jeremysdad

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Re: Random question, for 2.0/AT/wagon owners.
« Reply #3 on: September 11, 2013, 10:03:59 AM »
According to that calculator, it is 3531 rpm at 65mph. I wonder how they can really make that call without knowing power output of the engine? I know it's just an estimate, but still. :)

3800 @ 70. Maybe it's not as close to redline as it sounds. Guess the glasspack reverb from it being under under the passenger compartment (in the stock location by the gas tank, but in a trunk car, that would be under the trunk and dampened somewhat by the back seat) of the wagon makes it sound worse than it is.

Thanks, guys. I had the thought about the calculators on the way home yesterday, but our internet was out when I got home. :)

Eta: Playing with the calculators, and assuming that the info I found regarding stock 2.0 redline being 5500 rpm being correct...at 100 mph it would be just under redline, @ 5432 rpm. Totally not trying it until I get my dream motor built, and some serious suspension mods done. Car blows around too much even with a rebuilt front end and proper alignment. lol

Offline 74 PintoWagon

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Re: Random question, for 2.0/AT/wagon owners.
« Reply #4 on: September 11, 2013, 10:45:01 AM »
Well, it don't have anything to do with power it's just positive numbers.
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Offline jeremysdad

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Re: Random question, for 2.0/AT/wagon owners.
« Reply #5 on: September 11, 2013, 01:27:11 PM »
I've always thought it exponential. I.e., if you have motor 1 running 100 hp, and motor 2 running 120 hp, motor 2 will be a lower rpm at final drive? No???

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Offline 74 PintoWagon

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Re: Random question, for 2.0/AT/wagon owners.
« Reply #6 on: September 11, 2013, 02:25:42 PM »
Power don't have anything to do with it, if your turning say 3000rpm at 65mph don't matter how much power you have it will always be 3000rpm at 65mph, only way that would change is if you changed gears or tire diameter, know what I mean..
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Offline jeremysdad

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Re: Random question, for 2.0/AT/wagon owners.
« Reply #7 on: September 11, 2013, 03:36:49 PM »
Not saying you're wrong.

But wouldn't 200 HP at 1500 rpm and 100 HP at 1500 rpm equate different final drive calculations? Or just less gas pedal?

Offline 74 PintoWagon

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Re: Random question, for 2.0/AT/wagon owners.
« Reply #8 on: September 11, 2013, 03:57:29 PM »
Now I understand what you're talking about, yes more power could take less pedal, less power more pedal, but at 65mph it's still going to be same rpm, just more or less pedal to reach/stay at the given speed. As I mentioned, final drive is always going to be the same regardless of power.
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