Throttle position indicator lights
04-12-2005, 04:37 AM
#1
Race Car
Thread Starter
Throttle position indicator lights
As I understand it, a non-tiptronic 964 motor does not have a throttle posiiton sensor. If that's the case, does the DME get any analog input for idle/partial/full throttle?
The reason I'm asking is that I'd like to wire a dash display for my in-car videos that would involve a row of three green lights. I'd like it to have one green light come on for partial throttle, two for half-throttle and all three for full throttle. My thinking was that I could use the electronic signal from whatever sensors the 964 motor uses to read throttle position to trigger whatever control I put together for this set of three lights.
Oh, and one more thing: I'm a complete idiot when it comes to electronics.
Still, it seems like it should be do-able. There's even a chance that my 964 motor was originally mated to a tiptronic transaxle. Are there any easy ways to tell?
Any ideas on the best way to do this?
The reason I'm asking is that I'd like to wire a dash display for my in-car videos that would involve a row of three green lights. I'd like it to have one green light come on for partial throttle, two for half-throttle and all three for full throttle. My thinking was that I could use the electronic signal from whatever sensors the 964 motor uses to read throttle position to trigger whatever control I put together for this set of three lights.
Oh, and one more thing: I'm a complete idiot when it comes to electronics.
Still, it seems like it should be do-able. There's even a chance that my 964 motor was originally mated to a tiptronic transaxle. Are there any easy ways to tell?
Any ideas on the best way to do this?
04-12-2005, 07:32 AM
#2
Racer
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No idea about electronics either but I would have thought it might be easier to link up a cable and pulley to the gas pedal, which would drive an on-dash gauge. I've no idea if such a thing exists but I can sort of see how it would work in my head.
04-12-2005, 11:17 AM
#4
Almost all the information you need is there, even though your engine doesn't have a true TPS.
Here's the solution:
Wide open throttle - the WOT switch
Partial throttle - (Not the Idle switch & Not the WOT switch) and V1(AFM)
Half throttle - (Not the Idle switch & Not the WOT switch) and V2(AFM)
Here's the solution:
Wide open throttle - the WOT switch
Partial throttle - (Not the Idle switch & Not the WOT switch) and V1(AFM)
Half throttle - (Not the Idle switch & Not the WOT switch) and V2(AFM)
04-12-2005, 01:05 PM
#5
Race Car
Thread Starter
Rick, my VIN is from my car's tub, which is a 1972. I've got a swapped-in engine that came from Germany.
Loren, thanks; that makes sense to me. Allthough it might be that a potentiometer could be added somewhere to the throttle to make it simpler, for me.
Loren, thanks; that makes sense to me. Allthough it might be that a potentiometer could be added somewhere to the throttle to make it simpler, for me.
04-12-2005, 04:44 PM
#6
"Allthough it might be that a potentiometer could be added somewhere to the throttle to make it simpler, for me."
You're right, but it then becomes a mechanical & electronic solution. That, though,
is the best approach, since monitoring the AFM is really a load sensing point and
not a really true sample of the throttle position. The AFM approach is kinda mickey
mouse, actually.
You're right, but it then becomes a mechanical & electronic solution. That, though,
is the best approach, since monitoring the AFM is really a load sensing point and
not a really true sample of the throttle position. The AFM approach is kinda mickey
mouse, actually.
