New Shift Kit Developed

[Trevor]

Originally Posted by speedr

I am going to putsomething together for myself which will be switchable simply to limit the added wear on my tramsmission for daily driving. I drive relatively hard and would rather have the tcu manage things properly. However, i would at times like to have a little more shifting enhancement such as if i visit the strip or hit the twisties. (like an enhanced "power" mode)

my budget for this will be about $25 and i will post my findings here. Any help members would like to offer is greatly appreciated.

If you refer back here to post 180, you will find data to set you on your way, and your budget will be adequate. Three alternative arrangements are included and cover your ideas.

[Nevin]

Originally Posted by TomsSVX

I think you are losing more in the customs, shipping them labeled as resale items cannot be cheap.

Tom

Yeah, no kidding. Why not ship it as an automotive part for repair? That's what I do when I send things to Canada. Cheaper for the guy on the other end to import the parts that way.

[Sir. Nate]

Don't get me wrong, I'm buying one anyway. just not as soon .

[oab_au]

Originally Posted by Trevor

If you refer back here to post 180, you will find data to set you on your way, and your budget will be adequate. Three alternative arrangements are included and cover your ideas.

Yes that would be Faster

Just say if you need a link to them.

Harvey.

[oab_au]

People ask me, "where do you get it?"

You get it here. http://www.subaru-svx.net/forum/showthread.php?t=45197

Harvey.

[92svx95]

Went on a mild adventure over the weekend. Put about 200+ mileage on the QC. I really like it. Passing cars on the freeway is really nice. =] Under normal driving it is really smooth. You don't even know it's there until you mash the throttle. once again, Thx Harvey. =]

[Trevor]

When I design something I subscribe to the "KISS" principal, so it is pretty simple.
It uses a LM741 Op-Amp configured as a comparator, comparing a regulated set voltage to the Throttle Position Sensors voltage. When the TP voltage reaches 1.8 V the Op-Amp sets to turn on a transistor to operate a DP/DT relay.

Why not a simple transistor driven voltage sensitive DPDT relay? I gather there is a direct connection to the TPS. This means that whenever the throttle position provides 1.8 V. or more, torque reduction can not occur and line pressure runs free, regardless.

One half turns the TCUs Torque Control line off the ECU and on to a regulated 4.5V, that it can pull up and down happily.

This indicates that the torque control signal is applied to the output from a 4.5 volt regulated supply. Phil has advised that the torque control is a binary switch not a voltage. It is either On or Off. Therefore the described arrangement will ask the torque control to short circuit a voltage regulated supply, backed up by 14 volts. Interesting stuff.

The other side of the relay inserts a resistor in the A solenoids control line to limit its signal to 5%. This action keeps both the ECU/TCU from posting trouble codes.

The circuit looks like this, the Throttle pressure signal is a 12V duty cycle that is run through the dropping resistor to reduce the signal to a 5V. signal to mix with the 5V shift signal. It is therefore claimed that the shift signal to the solenoid is at 5v. The inclusion of the resistor to allow the two signals to drive the solenoid even though they may be opposite. Opposite? At negative potential? This happens when the throttle is wide open its duty cycle signal is 5%, when the shift is to operate the shift voltage is increased to about 80% to soften the engagement, if the resistor was not used one line would short out the other line, Why? They are of the same polarity. so it acts as an isolator, or voltage divider. In order to operate as a voltage divider the so called ‘throttle signal’ must be at negative potential.

Everything indicates that the resistor circuit must be at negative potential, which it is not.

When the Small Cars Shift Kit is used, the reduced resistance in the Throttle line causes a higher line pressure that (?than) would normally be used, but even with this in place, a full throttle change still has the line pressure reduced through the shift line, Exactly how? so it really does nothing but fool the driver into thinking it is producing a solid change. (Not according to those who have it. The secondary resistor included in the kit is of high resistance and is included only to prevent a fault signal. The effect equates with fully opening the circuit, which has been found to have a definite effect, confirmed by many who have tried it.)

The "Q C" may work, but not in the way intended or described and only as result of luck.

After reading Harvey’s post #153 and posting a reply as above, it was clear to me that the writer was using words and terms with which he is not familiar, therefore one of two situations applied.

Someone else had designed the “QC” circuitry and or, the writer was being intentionally confusing so as to hide detail. I therefore posted #158 as above by way of obtaining clarification, and received #161 in reply. This excuse confirmed that the writer was out of his depth, regarding the terminology he was using and someone else was involved.

It was not long before I twigged to the fact that a hobby kit was being used, as the required knowledge to design the described circuitry was beyond that of the alleged designer. A check through catalogues has disclosed that this is indeed correct and plagiarism is rife.

The “QC” comprises Jaycar Electronics Australia's universal voltage switch, catalogue number KC-5377 and their enclosure/box UB3, HB-6013. These two items are available here in N.Z. for a total price of less than NZ$40-00, with a discount for lots of five or more. In Australia, where the “QC ” vendor is based, one would expect an even better price. Units or ten have been mentioned by the distributor, which is significant.

Complete assembly data covering the kit is published in “Performance Electronics for Cars”, an Australian publication first published 2004. Their description titled, “How it Works” as below, is enlightening and discloses from where the wording, so poorly put together in post #153, was derived.

----"The simple voltage switch relies on comparator ICa (Operational amplifier), which compares the input to a reference level. The input voltage is divided by two 1meg ohm resistors which apply one half of the voltage to the inverting pin of IC1. Zener diode ZD2 and a 100nf capacitor protect against transient voltage on the input signal. etc. etc. ----"

It is easy to see from where strange reference to a voltage divider in post #153 was obtained. This next piece of text is also interesting, in view of the conflicting wording referring to hysteresis in post #153.

----]“Hysteresis has been added to prevent the output from oscillating at the trigger voltage. Basically the hysteresis is the difference between the between the switch on and switch off voltages and this is set using potentiometer VR2.” ----

Two resistors across the relay output, will turn the assembled voltage switch kit into a “QC”. However an interesting anomaly is the text in Harvey’s description i.e.,
"One half turns the TCUs Torque Control line off the ECU and on to a regulated 4.5V, that it can pull up and down happily.”
This surely is not the method in fact applied. Refer my post #158 above.

In view of the fact that the now plagiarised design has been published commercially, intellectual property rights will apply. This means that Harvey could be covertly operating beyond the law. Jason/ SVX Parts Central, could also become drawn into any possible litigation. Granted, due to the limited sales, the publishers would probably decide that court proceedings would not be cost effective.

I am not at all concerned that Harvey has used a kit set for his project, a logical idea, good on him if he is willing to accept the risk. What is not on, is the blarney of writing himself up as the designer of intricate circuitry. There surely is no shame in being honest.

[oab_au]

No that is what you said you would use Faster

Quote:
"Could be that i only thought this was the way to do it.
I am bloody well sure I can do it using a Jaycar electronics kit
KC-5377 costing about 35 bucks, but might have to connect an extra relay to be sure the current is not too much for maybe an extra 5 bucks."

As shown here. Bad language warning.
http://www.svxworldforums.com/forum1/575-11.html
Harvey.

[Trevor]

Originally Posted by oab_au

No that is what you said you would use Faster

Quote:
"Could be that i only thought this was the way to do it.
I am bloody well sure I can do it using a Jaycar electronics kit
KC-5377 costing about 35 bucks, but might have to connect an extra relay to be sure the current is not too much for maybe an extra 5 bucks."

As shown here. Bad language warning.
http://www.svxworldforums.com/forum1/575-11.html
Harvey.

No doubt he must have a catalogue and also a few clues. Bad language would be a necessity to get anything across in your grubby prefered choice of habitat and sales platform.

Good side step, but the facts still stand, as someone will find when they examine your "QC". A genuine photograph of the innards would make an in interesting feature for this thread. I do mean genuine, not a lash up with the same intent as your description. Not to worry, the truth will prevail given time.

Your next ploy as is usual, will no doubt be to bury my post in a barrage of glib. Go to it.

[Myetball]

Didn't somebody get ned from that "grubby habitat" for being a total and continual PITA?

[lhopp77]

If I was going to buy a shift kit, I would feel very comfortable with buying this one. I have seen much more detailed information on it with dyno run data than I ever saw on the smallcar kit. Of course, maybe I missed detailed information on that one--but I doubt it.

Lee

[RSVX]

Originally Posted by Myetball

Didn't somebody get ned from that "grubby habitat" for being a total and continual PITA?

That's what I am saying, he claims high horse, and then pulls that... talk about self contradictory.

[Trevor]

Originally Posted by RSVX

That's what I am saying, he claims high horse, and then pulls that... talk about self contradictory.

I presume I am intended to be the target of the above remark. I do not claim "high horse".

It appears that many are unable to assimilate more than three or four simple words. Understanding requires a little concentration and comprehension. The essence of my post is in pointing out deception which has occurred, as a means of self gratification. In no way can this be considered to be an honest objective, particularly when there is a profit motive.

P.S. If I had made the above statement, my post would be history. Read the rules. Obviously it is an advantage to be part of the executive.

[bwb3]

When a person develops a modification that provides an upgrade to the stock SVX systems, I would expect that they would utilize components that are available from other manufacturers to assemble the final product offered. If the QC has some "off the shelf parts", so what? I smell sour grapes here. Pardon the bad English. I have been living in the South of the U.S.A. for too long.
With due respect,
Gene

[Trevor]

Originally Posted by lhopp77

If I was going to buy a shift kit, I would feel very comfortable with buying this one. I have seen much more detailed information on it with dyno run data than I ever saw on the smallcar kit. Of course, maybe I missed detailed information on that one--but I doubt it.
Lee

You most certainly did miss the detail covering the development of the smallcar kit. A great deal of incorrect input from Harvey had to be sorted, It was a laborious process and all is recorded within the archives.

In that instance there was no high horse self endorsement by the originator, and he looked for no special recognition regarding his idea.