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Help With Heel-Toe Downshift

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Old Nov 14, 2007 | 11:26 AM
  #11  
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Default RE: pedals

Thanks PayDay. Those are replacement pedals...not overlays?
Old Nov 14, 2007 | 12:31 PM
  #12  
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Default RE: pedals

ORIGINAL: Argonaut
Those are replacement pedals...not overlays?
Well, it's not the easiest install, but I was able to manage it and I would classify myself as non-mechanically advanced. Plus, it was totally worth it from a driveability standpoint, and, they look cool.

The accelerator pedal just screws into the plastic stock pedal. I *almost* messed up on this as the way I had it positioned originally it would've bumped the floorboard at WOT. So make sure you push it to the floor and then measure where the pedal needs to go.

For the clutch and the brake, you take off the rubber covers. Then you have to drill holes through the metal pedals. The trick is marking the holes and getting the drill to drill where you want it to (slippery metal, hard to pound a starting hole due to space). The holes end up very close to the edge of the pedals, hence the trick. I drilled three holed in each.

The dead pedal wouldn't stay on with the screws provided as they are too short. So I got some longer ones at home depot. You are screwing through the carpet into the pad underneath, so it's not the most stable thing in the world. I could reach down and rip it off the floor if I wanted to. But aside from that, I have about seven screws in it and it hasn't come loose yet.

My buddy put these on his S2000 track car and had to remove the seat to have enough room to do it. I didn't have to luckily, but it might've made the job easier

My car seemed to drive a bit weird after I installed them. I finally figured out it might have something to do with depressing the accelerator with the car off while I was trying to get the new pedal screwed on. So I did the "reset the computer" procedure, reflashed my tune and everything was back to normal.


Old Dec 11, 2008 | 07:36 AM
  #13  
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This question has popped into my head numerous times as well. I wear size 11-12 shoes (depends on what type of shoes they are) and find that I cannot use the heel of my right foot to blip the throttle because my right knee bangs into the steering column. The only logical way (from my perspective) is to use the heel of the right foot for the brake and the toes for the throttle. Relying on the right-half of the right foot for blipping the throttle seems iffy because of the gap between the brake and throttle. I am open to recommendations though because I'm willing to learn. I normally plant my right heel on the floorboard for conventional driving due to the size of my feet. I've gotten used to rev-matched downshifts (the only way to go IMHO) and now I just need to apply braking with this simultaneously.
Old Dec 11, 2008 | 10:18 AM
  #14  
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Originally Posted by Argonaut
Another question - do you 'double clutch' (push the clutch in twice per downshift) or just single? I've been blipping the throttle with the clutch in but I heard someone else mention this causes excessive wear on the clutch...maybe I should just get a book and read it.
You need to blip the throttle for two reasons while downshifting.

1. Rev matching - if you let the clutch out in a lower gear and the engine is at idle, the engine braking can upset the car, especially if you are already using the brakes hard.

You blip the throttle while the clutch pedal is depressed, right before you start letting it up. This way the engine is turning roughly the right RPM for the lower gear at that speed.

2. Double clutching - this is to match the RPM of the input shaft of the transmission to the output shaft to make an easier shift. This is not necessary for a synchromesh transmission, but it can theoretically reduce wear on the synchros and does make for a smoother shift.

Here you press the clutch, shift to neutral, let up the clutch pedal, blip the throttle to spin up the input shaft, and then depress the clutch to shift to the lower gear. The input and output shaft on the transmission should be going the same speed for a smoother shift. (This is what the synchros do for you.)

According to Going Faster! by Carl Lopez from the Skip Barber Schools, you can do both at the same time. These instructions are for a gearbox without synchronizers where you must double clutch:

With your foot on the brake you push in the clutch and shift to neutral from a higher gear. You let the clutch out, and then, still in neutral, you blip the throttle.

Since, with the clutch engaged, the motor is directly connected to the input shaft, your blip easily spins up the shaft to the higher RPM. The instant after you blip, push in the clutch and move the gear lever into the third gear position. Once it's there, let the clutch out again. This last bit has to happen fast enough before the extra RPM created by the blip falls away.

By performing this series of maneuvers, you've synchronized the gears, going from fourth to third without grinding. The secondary benefit is that since the clutch re-engaged in third gear with the engine turning over at the right RPM for the road speed, you shifted into third gear smoothly without lurching off the drive-line.
On the street I can double clutch with one or two blips. On the track I usually only rev match, relying on the synchros to help the downshift.

metroplex, I also have size 12 feet. I put the ball of the foot on the right 1/3 of the brake pedal and turn/tilt the side and heel of my foot on the gas. The side of my foot kinda catches the side of the gas pedal. I find the pedals in my Mustang to be much better than my Miata, which was highly rated by the magazines for heel/toe. I think the Mustang might be easier for big feet.

- Wayne
Old Dec 11, 2008 | 10:30 AM
  #15  
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If I turn my right foot counter-clockwise so the heel touches the gas and the ball of the foot is on the brake pedal, my knee slams into the steering column.
Old Dec 11, 2008 | 03:25 PM
  #16  
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Do either of you realize you dug up a thread that is over a year old?
Old Dec 11, 2008 | 06:49 PM
  #17  
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I like those autovation pedals.

Last edited by Texotic; Dec 11, 2008 at 06:52 PM.
Old Dec 12, 2008 | 08:47 PM
  #18  
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LOL - man this is old. Well since my original post I have developed my technique and now am really comfortable (don't have to think about it). I can do either the toe on brake, heel on gas or split the foot with half on the brake and half on the gas technique rocking the foot, with equal ease but tend to do the first on race tracks because I like the feel of the ball of my foot fully on the brake pedal during those hard stops.

Funny thing about those Autovation pedals. The gas pedal has a tab on the lower left side that sticks out about 1/2 inch, its designed to allow your heal to easily hit it during a Heel-Toe. So I bought and installed them. Then I took an autoX course at FedEx field in DC. Brian Garfiled (a well known autox instructor) drove my car with his tennis shoes on. Going hard, down hill, into about 120 degree left hander he hit the brake and mistakenly got the gas at the same time (that damn tab on the pedal), needless to say we wiped out a wall of cones and Brian got roasted by all the other instructors. He wasn't too happy :-). After that he drove my car with his shoes off. So once I got home, enter the Dremel tool, and off with the tab.
Old Dec 12, 2008 | 11:27 PM
  #19  
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LOL! you bought them and then took off the tab??? what's the point???
Old Dec 13, 2008 | 02:58 PM
  #20  
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Well....they look cool. There are better things to spend money, thats for sure.



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