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Old 12-04-2001, 10:33   #1 (permalink)
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Tiptronic Circuit for EF/EL Auto's

Just looking through the Workshop manual for EF's, and came across the idea of a simple tiptronic style system for the BTR's.
Hydrauliclly, the only difference between shifting from 1,2,3, and D, is that when the lever is positioned in 1, Engine Braking is applied by bypassing the OWC on overun.

The rest of the transmission lever sends a discreet resistance to the ECU, giving the Gear Lever Position.

I have come up with a simple electrical circuit, which will change a resistance value, based on the operation of two buttons, Gear up, and Gear Down.

So the theory is to trick the Transmission into thinking that you have Manually selected gears, by using these discreet values, instead of the actual Gear lever position.

Anyway, I havent tried this theory out yet, but was wondering if anyone could see any possible problems, flaws, faults, or anything that I should be concerned about, before starting on this ?????

Cheers
Matt
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Old 12-04-2001, 17:57   #2 (permalink)
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Shouldn't be a problem. One UK company in does a kit like this for around $1000. It is marketed in Australia, but I can't remember by who, I will look it up. If you are willing to, could you send me the details so I could have a go too. tickfordxr8@bigpond.com

Thanks
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Old 12-04-2001, 18:59   #3 (permalink)
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Thanks for the info !!!
I think the total cost of the circuit will be around $50.00 all up.
What I plan on doing is using the standard steering wheel contacts used for the cruise control. (The cruise control buttons use discreet resistance values also, so as to save on the number of electrical contacts on the steering wheel boss). And probably mounting some extra switches on to the steering wheel hub, or alternatively, use the cruise control switches (Left side buttons for Down gear, Right side Buttons for up gear).

For the moment though, I will try a simple version of the circuit on the weekend, to see if I trick the ECU, and let you know of my progress.
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Old 12-14-2001, 02:08   #4 (permalink)
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Quote:
Originally posted by grantj
Shouldn't be a problem. One UK company in does a kit like this for around $1000. It is marketed in Australia, but I can't remember by who, I will look it up. If you are willing to, could you send me the details so I could have a go too. tickfordxr8@bigpond.com

Thanks
Grant
If you're thinking of the same UK company I'm thinking of, it would be www.racelogic.co.uk . The Australian distributor for their stuff is www.chiptorque.com.au . I actually like the look of Racelogic's traction control systems. HSV have one fitted in their Maloo 6.2 litre show/concept car (and it would bloody well need it too :s6:
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Old 12-16-2001, 15:39   #5 (permalink)
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There's nothing on www.chiptorque.com.au webpage anymore but back in the late 90's Streetmachine ran an article on their Falcon chips and Triptronic kit for EEC IV & EEC V vehicles. Sounded like a pretty good set-up.
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Old 12-18-2001, 17:24   #6 (permalink)
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Thumbs up

I Have tested this, and so far it looks promising !!!
I was able to select gears Using a digital switch, and hold gears, whilst the Transmission was in drive. The transmission acted like the lever was physically in '1', '2', and '3'

The circuit at the moment, is quite simple, but will become more complicated, with some overides that need to be put in.
(I.E. Checking to see if the Tranmission is in Drive, and not in Park, Neutral, or Reverse). Also, I want to get the thing to use the cruise control buttons, (or other wheel mounted buttons) to change gears.
This means a fair bit of work to get the Discreet Resistance values working for the cruise control, and TipTronic.
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Old 01-18-2003, 19:39   #7 (permalink)
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How did this project end up panning out matti?? Did you get the cruise buttons to work and change gears?

I'm really interested in this....
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Old 01-19-2003, 00:25   #8 (permalink)
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Corrrrrrr........
This is an old thread !!!!!!

I got to the stage where I could trick the thing (EEC) into thinking that a different gear was selected, than was actually choosen on the Gear selector........

But......
Physically shifting in to 1st actuated some solenoid (Mechanically), so it wasnt quite right for take offs.

Then there was the complication of checking if the Gear Lever was placed in to Park/Reverse/Neutral, Which I couldnt be stuffed in to working out....

Finally, I couldnt be stuffed trying to work out a way to get the Cruise buttons to work, along side a secondary circuit......

Basically, the idea works, but In the end, I couldnt be stuffed pursuing it, or refining the thing so as it was an elegant solution.
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Old 01-19-2003, 02:56   #9 (permalink)
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Would a BA gearstick thing be any better, because you can't have one of them in park & drive at the same time.
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