festy's Alfa Romeo Alfetta GTV
Re: festy's Alfa Romeo Alfetta GTV
Hi Festy,
I am keen to give one of your boards a go - I have an immediate application.
I don't need it packaged.
Cheers,
Matt
I am keen to give one of your boards a go - I have an immediate application.
I don't need it packaged.
Cheers,
Matt
Re: festy's Alfa Romeo Alfetta GTV
I've been playing with scaling the VSS signal up and down, results are looking promising:
(blue = VSS in, yellow = scaled signal out)
PPK reduction (division): PPK increase (multiply): I'm hitting a few issues with both measuring and generating really low speed pulses, but I think I should be able to sort that out...
(blue = VSS in, yellow = scaled signal out)
PPK reduction (division): PPK increase (multiply): I'm hitting a few issues with both measuring and generating really low speed pulses, but I think I should be able to sort that out...
- Holden202T
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Re: festy's Alfa Romeo Alfetta GTV
yeah i too would buy a basic board and i don't need a box or anything
No matter what the question is, the answer is always more horsepower!
Just starting out? Have a read of the getting started guide
Basic tuning of a delco ECM with $12P thread
Advanced tuning of a delco ECM with $12P thread
Just starting out? Have a read of the getting started guide
Basic tuning of a delco ECM with $12P thread
Advanced tuning of a delco ECM with $12P thread
Re: festy's Alfa Romeo Alfetta GTV
This might not look too significant, but...
The blue trace is a square wave, like a hall effect sensor would produce, and the yellow trace is the square wave output from my reluctor amp board.
This signal is being converted from a hall effect to a reluctor type, then back to a hall effect, eg. a universal converter .
The "reluctor" waveform in between the conversion stages doesn't look much like a sine wave, but it's triggering the zero crossing detector pretty well as shown by the input and output signals staying 180* out of phase.
The blue trace is a square wave, like a hall effect sensor would produce, and the yellow trace is the square wave output from my reluctor amp board.
This signal is being converted from a hall effect to a reluctor type, then back to a hall effect, eg. a universal converter .
The "reluctor" waveform in between the conversion stages doesn't look much like a sine wave, but it's triggering the zero crossing detector pretty well as shown by the input and output signals staying 180* out of phase.
Re: festy's Alfa Romeo Alfetta GTV
So I've been working on this in my spare time, and finally got around to installing it in my poor old Patrol yesterday. It's speedo has always read about 10km/h fast, so a perfect test candidate
My speedo corrector can take either a hall effect or VR (reluctor) sensor as input and can emulate both types, so will work with either as well as convert signals from one sensor type to the other.
The "correction" amount is done via a pair of trimpots - one for coarse adjustments and one for fine tuning.
There's 2 adjustment ranges - roughly 3:1-1:3, and 10:1-1:10.
My Patrol uses a VR type VSS, and now reads only about 1km/h fast at 80 so I'm pretty happy with that result
My speedo corrector can take either a hall effect or VR (reluctor) sensor as input and can emulate both types, so will work with either as well as convert signals from one sensor type to the other.
The "correction" amount is done via a pair of trimpots - one for coarse adjustments and one for fine tuning.
There's 2 adjustment ranges - roughly 3:1-1:3, and 10:1-1:10.
My Patrol uses a VR type VSS, and now reads only about 1km/h fast at 80 so I'm pretty happy with that result
- VL400
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Re: festy's Alfa Romeo Alfetta GTV
Nice work, the board has turned out well!
Re: festy's Alfa Romeo Alfetta GTV
Hi Festy will you still be making these available for sale ? I'm still interested
- Holden202T
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Re: festy's Alfa Romeo Alfetta GTV
yeah nice work!
1km is good enough, and a hell of a lot better than the 10 you had before!
1km is good enough, and a hell of a lot better than the 10 you had before!
No matter what the question is, the answer is always more horsepower!
Just starting out? Have a read of the getting started guide
Basic tuning of a delco ECM with $12P thread
Advanced tuning of a delco ECM with $12P thread
Just starting out? Have a read of the getting started guide
Basic tuning of a delco ECM with $12P thread
Advanced tuning of a delco ECM with $12P thread
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Re: festy's Alfa Romeo Alfetta GTV
I agree, that has turned out well
Have you read the FAQ? For lots of information and links to significant threads see here: http://pcmhacking.net/forums/viewtopic.php?f=7&t=1396
Re: festy's Alfa Romeo Alfetta GTV
Haha thanks, but I don't think I should give up my day job any time soon thoughVL400 wrote:Nice work, the board has turned out well!
I still need to do some more testing first, I'll PM you as soon as I'm done.HQ355 wrote:Hi Festy will you still be making these available for sale ? I'm still interested
Being "only" 10km/h out already made it one of the most accurate speedos I've ever hadHolden202T wrote:1km is good enough, and a hell of a lot better than the 10 you had before!
I really didn't want it any closer, and certainly didn't want it reading slow at all...