4runner gas pedal vs gx470, weird I know but read.....

[inscarguy]

Ok here's the story. My new to me 4runner had the cut gas pedal but I wanted to put on my OBX pedal covers. I purchased a GX470 one because I thought they were the same. They had different part numbers but I figured toyota vs lexus numbers so I bought it.

I put it in yesterday and right off the bat it was about 2" higher so the driving position was a little less comfortable. Here is the kicker, no 4runner drive by wire lag, the kick down required much less travel to engage, response was instant, much much more fun to drive. It was like having a sprint booster installed but much more controlled.

If it was not for the higher position I would have kept it in there. What a difference. The lexus pedal must have different programming than the toyota one.

 

[AngryFatPanda]

got any pics of the pedal? you may have stumbled on something good here..

 

[who done it]

Yeah I'm down, did you buy the whole assembly?

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[NCrunner2012]

More info plz

 

[SurferUK]

Ok here's the story. My new to me 4runner had the cut gas pedal but I wanted to put on my OBX pedal covers. I purchased a GX470 one because I thought they were the same. They had different part numbers but I figured toyota vs lexus numbers so I bought it.

I put it in yesterday and right off the bat it was about 2" higher so the driving position was a little less comfortable. Here is the kicker, no 4runner drive by wire lag, the kick down required much less travel to engage, response was instant, much much more fun to drive. It was like having a sprint booster installed but much more controlled.

If it was not for the higher position I would have kept it in there. What a difference. The lexus pedal must have different programming than the toyota one.

More info plz

Agreed, how are you getting on with the Lexus pedal OP?

 

[inscarguy]

Here are the pics of the gx pedal. I had to take it out due to my leg injury. It changes the height about 2 inches. It sits in the same location but closer to the driver. The 4runner pedal sits pretty level or just behind the brake pedal. I loved driving it with the GX pedal. I put the 4runner one back in and back to the old delay and lack of responsiveness.

 

[inscarguy]

**UPDATE**

took the 4runner pedal out and replaced the GX electrics on the 4runner pedal. No change. Swapped everything back and put the GX pedal back in and I got everything back like I mentioned in the first post. I don't understand what's with this pedal. I have attached some pics for all of you to see. Maybe " blackworks" can chime in. Maybe he might have an answer.

The 4runner pedal has the OBX cover on it.

 

[SurferUK]

**UPDATE**

took the 4runner pedal out and replaced the GX electrics on the 4runner pedal. No change. Swapped everything back and put the GX pedal back in and I got everything back like I mentioned in the first post. I don't understand what's with this pedal. I have attached some pics for all of you to see. Maybe " blackworks" can chime in. Maybe he might have an answer.

The 4runner pedal has the OBX cover on it.

Just thinking out loud...the pedal is just a potentiometer I think. Or a pair of potentiometers, for safety/redundancy. I wonder if the Lexus one is designed to simply deliver more milliivolts to the ECU. Although that wouldn't explain the snappier response. So maybe there is more to it...

Do you have a multimeter? It would be interesting to see the resistance in ohms, and the rate of change, for the pedal at various different positions.

 

[aemravan]

Just thinking out loud...the pedal is just a potentiometer I think. Or a pair of potentiometers, for safety/redundancy. I wonder if the Lexus one is designed to simply deliver more milliivolts to the ECU. Although that wouldn't explain the snappier response. So maybe there is more to it...

Do you have a multimeter? It would be interesting to see the resistance in ohms, and the rate of change, for the pedal at various different positions.

he swapped the electronics out to the 4runner housing/pedal and it was like his factory pedal. The electronics are the same it would seem.

With that said, it is a potentiometer, but the difference is almost certainly coming from the different pedal configuration which allows your foot to more readily move it through its arc resulting in a slight change in delay.

 

[aemravan]

just went back and looked at the pictures and I am just about 99% certain it has everything to do with the different geometry, and not electronics, as your swap has already proven.

You can do the same thing and swap your 4runner pedal to the lexus assembly and still result in the same performance you had before.

The difference is coming from the position/angel of the lexus pedal vs the 4runner. It's all just in the geometry of arc-angles. With the 4runner pedal you are at a different position along the arc sweep vs where you are with the lexus pedal. The instantaneous position change with the starting placement of the lexus pedal translates to more motion from the same amount of foot displacement with the 4runner pedal. It may not be very apparent with just the 2 pedal sitting side by side, but if you envision where your foot sit, and how your foot sweeps through its own arc are you push down on the pedal you'd see that you have slightly more direct input with the lexus pedal that isn't wasted by downward motion. If that makes any sense at all... lol.

 

[SurferUK]

just went back and looked at the pictures and I am just about 99% certain it has everything to do with the different geometry, and not electronics, as your swap has already proven.

You can do the same thing and swap your 4runner pedal to the lexus assembly and still result in the same performance you had before.

The difference is coming from the position/angel of the lexus pedal vs the 4runner. It's all just in the geometry of arc-angles. With the 4runner pedal you are at a different position along the arc sweep vs where you are with the lexus pedal. The instantaneous position change with the starting placement of the lexus pedal translates to more motion from the same amount of foot displacement with the 4runner pedal. It may not be very apparent with just the 2 pedal sitting side by side, but if you envision where your foot sit, and how your foot sweeps through its own arc are you push down on the pedal you'd see that you have slightly more direct input with the lexus pedal that isn't wasted by downward motion. If that makes any sense at all... lol.

I agree, well spotted. I mis-understood the earlier post. That's why I wondered what the rate of change as measured by an ohmmeter would be, for comparable pedal positions.

So it's Lexus drive shafts and Lexus pedals :biggrin1:

 

[stopthefury]

I have an 06 V8 SE, I drove my friend's recently lifted GX470 last weekend....

HOLY COW!!! Can confirm I need this upgrade!!

It's like a world of difference and the lag almost disappears.

 

[aemravan]

I have an 06 V8 SE, I drove my friend's recently lifted GX470 last weekend....

HOLY COW!!! Can confirm I need this upgrade!!

It's like a world of difference and the lag almost disappears.

well.. just get you a lexus pedal if you can live with the extra raise that you will need to live with in the 4th gen.

 

[ads2539]

I’m not a computer/electronics professional, but I think the users who say the different response is because of the different geometry of the GX470 pedal are correct.

I don’t see anything that would indicate that the pedals are transmitting different information in any way. Except for the geometry, the pedals look the same to my untrained eyes.

 

[inscarguy]

I can see what you're saying. There still has to be something else. With the 4runner pedal, I push down 1/2 inch, nothing, dead. I have to push more to get acceleration, whereas with the GX pedal I push that same 1/2 inch I'm already doing 20mph. I looked at the beginning and end travel and they are the same. The only difference I could see was the shape of the pedal arm.

 

[TLar25]

Interesting, I vaguely remember noticing this when I first picked up my GX a few years ago. After the 35's though I don't think I notice it anymore [emoji23]

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[aemravan]

I can see what you're saying. There still has to be something else. With the 4runner pedal, I push down 1/2 inch, nothing, dead. I have to push more to get acceleration, whereas with the GX pedal I push that same 1/2 inch I'm already doing 20mph. I looked at the beginning and end travel and they are the same. The only difference I could see was the shape of the pedal arm.

but there isn't anything else.. you have confirmed that swapping the internals you don't get the same result with your 4runner pedal being the only difference. you can take it a step further and meter out difference values of pedal travel vs output for both but I can almost guarantee you won't see a difference. It's all about the arc length of the pedal travel in relation to the arc length that your foot travels to input the same displacement. You have more wasted travel due to geometry on the 4runner pedal vs lexus pedal. You says "push down 1/2" but that doesnt mean that the pedals have both displaced the same exact amount. Your foot just made the same perceptible displacement but it didn't fully translate into the arc length travel equally between the 2 pedals.

 

[AuSeeker]

I was thinking about this topic when driving my 2004 V8 T4R, the OP said he had to depress his gas pedal around 1/2" to get response from the engine, I tried this numerous times and mine responds almost instantly to very little pedal input, way less than 1/2", I have purchased a Sprint Booster..BUT I have never installed as of yet because I don't seem to have the pedal lag most seem to talked about on the forum.

 

[BostonJon]

Cmon OP - post the Lexus part number already.

 

[ads2539]

The part number is 78120 - 60350.