New replacement throttle pedal sensor

[davy83]

Hi guys. I am now in week 2 of running a prototype contact less throttle pedal sensor, and so far its superb. I have a 2001 3200GTA. Results so far - I have lost some of the speed variation when idling (which is odd I was not expecting that) the whole engine control feels generally smoother. I have noticed that control of speed at low speed is now very smooth and the slight lurching I used to get has gone. I have also noticed that when releasing the pedal to slow down the car behaves much better than it used to. I think there are two things here. I probably had a sensor (the old one) with a worn bit near the idle position. I also think its really difficult to get the voltage out of the sensor to within the limits prescribed by Maserati, when in its idle position, as the only adjustment is the shims on the back face of the pedal box, and moving the shims alters the setting. So I have built the contact less device with a movable sensor (2 screws) so you can adjust the idle output voltage to be absolutely correct with the sensor in situ, and then get the full throttle output correct with the adjuster bolt on the pedal assembly. So its set up perfectly. I got the nice people at one of the major transducer manufacturers to make me a special transducer with dual outputs (like the original) to match the electrical output from the Bosch unit, and have made a machined aluminium and steel bearing and lever assembly, so its not plastic bodied like the Bosch unit. I am thinking this should last the life of the car so its all metal and has two precision SKF bearings. I will probably make more for general sale, so if any one is interested please PM me. I will post some pictures once I have stopped driving around with this massive grin!!

 

[lozcb]

Hi guys. I am now in week 2 of running a prototype contact less throttle pedal sensor, and so far its superb. I have a 2001 3200GTA. Results so far - I have lost some of the speed variation when idling (which is odd I was not expecting that) the whole engine control feels generally smoother. I have noticed that control of speed at low speed is now very smooth and the slight lurching I used to get has gone. I have also noticed that when releasing the pedal to slow down the car behaves much better than it used to. I think there are two things here. I probably had a sensor (the old one) with a worn bit near the idle position. I also think its really difficult to get the voltage out of the sensor to within the limits prescribed by Maserati, when in its idle position, as the only adjustment is the shims on the back face of the pedal box, and moving the shims alters the setting. So I have built the contact less device with a movable sensor (2 screws) so you can adjust the idle output voltage to be absolutely correct with the sensor in situ, and then get the full throttle output correct with the adjuster bolt on the pedal assembly. So its set up perfectly. I got the nice people at one of the major transducer manufacturers to make me a special transducer with dual outputs (like the original) to match the electrical output from the Bosch unit, and have made a machined aluminium and steel bearing and lever assembly, so its not plastic bodied like the Bosch unit. I am thinking this should last the life of the car so its all metal and has two precision SKF bearings. I will probably make more for general sale, so if any one is interested please PM me. I will post some pictures once I have stopped driving around with this massive grin!!

excellent Davy , pics and details on how to fit would be good for the tech section


regards loz

 

[conaero]

Well done fella, where did you buy the item from?...Boomerang in Holland?

 

[MAF260]

Sounds like Davy made it himself Matt. Wish I had half the skills!

 

[rs48635]

@davy83
You beauty!
Mine is okyay just now, but will have one form you when mine does start playing up.

 

[deano]

superb,lets see the images

 

[ENZ525]

Fantastic dayy83, very well done

 

[davy83]

Err well thanks guys, I have changed my sensor out 3 times admittedly one of these was second hand but i just thought, there has to be a way to sort this out and forget about it. I think i have it nailed. I have made the body and mechanical assembly mostly from machined aluminium parts and the actual rotary sensor is made by a company that mostly do military and aerospace sensors but i have worked with them for a long time and they made me a contact-less rotary sensor, its very high reliability and has extremely low noise output, which also explains the smoothness I suppose. I have asked them about more sensors so others can do this, but don't have an answer yet. It was not as expensive as the Bosch unit which I think is basically a rip off. I will take it out of the car again and get some pictures at some point, just enjoying the test drives for the moment!

 

[BennyD]

Davy83, it is always nice to hear of someone improving the breed. Top work.

 

[NickP]

I would be interested in one of these and I'm sure others will be also. Good work!

 

[drellis]

mine is fine at moment but i would like this to. great work

 

[bill]

Same here. Have not had any problems since I converted the throttlebody. I remember it making such a difference! I often wandered if using a variable rate of change (like a logarithmic pot) would make it much easier to drive? Having said that I eventually got use to it!

 

[rotorheadcase]

I suspect you're correct Bill. A log rate of change would be far better for city traffic than the linear pot and although you do get used to it, I can't help but feel it would work much better with the turbos.

Regards,

Neil