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4Runner_mudder

4Runner_mudder

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i hit 106 on the way home today.
had the O/D off and the ECT on. lol.
i was racing a Nissan Titan, but it wasnt fair, he got a head start.
 
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well, i had the O/D engaged... for some reason, it seems kinda backward, but when you hit the button, the light on the dash reads, "O/D OFF", so i dont know.
but i was runnin about 5K RPM, maybe 5.5
 
well when its pushed in, its active, and when its sticking out, its off, but ur rpm sounnds like u had it off, if u would have pushed it in, it tould have given you another gear
 
well power yes but speed no,

please someone else jump in, if it was a race, sure turn it off but i would turn it back on around 60 mph
 
Don't stoop to their level and street race.
Keep in on the track. There are way to many accident involving street racing.
 
Yeah, the gearing on the 4runner seems to run out of steam after you pass 100. If i have ever tried to get the top speed out of my 4Runner, it's downhill and with O/D off to keep the engine at full boil. I've seen almost 110 before it bounces off the limiter.
 
you want the overdrive on at high speed, it allows the engine to spin slower than the output of the transmission (hence overdrive) it basically adds another gear.
 
But, if your on mostly level ground or going up hill and you've got it mashed to the floor, with over drive on you are not going to keep a constant speed, I have tried. At least with over drive off, it lets you overcome the wind resistance and weight of the vehicle to get a few MPH out of her.:biggrin2:
 
however the OD will give you a higher gear, allowing you to go faster. Drive at 80 with your overdrive off, then turn it on, you will see the rpms drop, you now have more available rpms to go faster..
 
This is true that it gives you a higher gear. But you'll be able to get up to top speed quicker with stock engine power and gearing if you turn O/D off, because the 4Runner will reach its top speed with O/D off, or "3rd gear". The only difference the O/D makes is that it provides a higher gear for lower RPM's while cruising to help improve gas mileage. My 4Runner turns about 4800-5000 RPM at 105+ MPH, and does about 3500-4000 at 105+ MPH. Putting it in overdrive won't make it go any faster at top end...
 
I can't believe we are having this discussion. I reach 110 pretty easily with the O/D on when I am going from Atlanta to Auburn. My 4Runner is a highway beast. I dunno why you have to turn the O/D off to achieve that in your Runner, Kelly. I also don't know why you are saying you can get more speed in a lower gear. Physics tell me otherwise.
 
It's pretty basic. A stock 4Runner simply just does not have enough power to overcome the stock gearing at higher speeds, so what you need to do is keep O/D off to keep the RPM's up, which allows the engine to make more power. Maybe the reason is your 2WD is geared differently than my 4WD.

Say you are doing 90 MPH with O/D on, and you floor it. O/D is not going to let you down shift and you are going to increase your speed much slower than if you had O/D off. It is harder for the 4Runner to pull away from 90 MPH at 3000 RPM (with O/D on, and without a downshift) than it is for it to pull away from 90 MPH at +/-4000 RPM (with O/D off, and the engine at its peak power curve).

Think of it like this: is it easier for a manual transmission car to start in first gear or in fourth gear?
 
KellyJ said:
It's pretty basic. A stock 4Runner simply just does not have enough power to overcome the stock gearing at higher speeds, so what you need to do is keep O/D off to keep the RPM's up, which allows the engine to make more power. Maybe the reason is your 2WD is geared differently than my 4WD.

Say you are doing 90 MPH with O/D on, and you floor it. O/D is not going to let you down shift and you are going to increase your speed much slower than if you had O/D off. It is harder for the 4Runner to pull away from 90 MPH at 3000 RPM (with O/D on, and without a downshift) than it is for it to pull away from 90 MPH at +/-4000 RPM (with O/D off, and the engine at its peak power curve).

Think of it like this: is it easier for a manual transmission car to start in first gear or in fourth gear?
Click to expand...

Are you really explaining this to me? I know how all that works. I've been doing import performance since 96 and sell Infiniti parts for a living. I'm saying that I don't need to turn O/D off to go over 100. I dunno why you have to with yours.
 
I don't need to have over drive off to get over 100... I'm just saying that after a certain point its just harder for the 4Runner to accelerate, and I noticed this, and to compensate, if I ever want to get up to 100+ MPH - more quickly in my opinion- I leave over drive off. If i want to do long stints at high speeds, I leave it on for better mileage...
 
KellyJ said:
I don't need to have over drive off to get over 100... I'm just saying that after a certain point its just harder for the 4Runner to accelerate, and I noticed this, and to compensate, if I ever want to get up to 100+ MPH - more quickly in my opinion- I leave over drive off. If i want to do long stints at high speeds, I leave it on for better mileage...
Click to expand...

But you are in a 5000lb SUV. Why would you need to get to 100 fast? I mean you have an RDX if you are trying to haul ass fast.

The whole point I am trying to make is that you can't go faster in third than forth, which brings us back to the gear ratio you were trying to tell me. 1st and 4th? Remember?
 
Going over 100 in any vehcile is considered wreckless driving and is endangering yourself and others especially in a 3rd gen which isn't very stable at those speeds.

It's dumb to do that in a sporty car on public roads but stupid to do it in a heavy,underbraked,tall SUV.

Hope nobody pays the price here.
 
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