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05-30-2006, 01:46 PM | #1 |
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How to make DCCD work on a 6MT swap into a WRX (or other non-STi)
I did some searching around and it looks like there once was a DCCD FAQ but the page no longer exists.
I'm trying to find out what is involved in taking a WRX and taking a STi 6MT and making the DCCD work with it. What is possible and how much will it cost? It seems that part of the information the Auto DCCD needs is integrated into the STi's factory ECU, so is only Manual DCCD operation possible on a WRX? A list of parts required would be great as well... are we just talking about adding the DCCD Module and the DCCD Switch, or are there other things needed as well? Is a wiring harness necessary or is making the harness doable? If anyone has a complete list I'd appreciate it. Is the STi DCCD Module all that is required, and does it matter what model it is from? What about sensors or switches? Also, how about the homemade DCCD control units discussed here on the forum and on ebay? Thanks in advance... Bryan
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Last edited by TROLL; 05-30-2006 at 07:03 PM. |
05-30-2006, 02:19 PM | #2 |
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i think xplane (fellow member here) is working on something to make full auto on 6spd swapped wrx...
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05-30-2006, 02:44 PM | #3 |
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pdxtuning knows of an aftermarket dccd controller. Shoot them an e-mail.
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05-30-2006, 02:47 PM | #4 |
Top Scoob 006
Member#: 14424
Join Date: Jan 2002
Chapter/Region:
South East
Location: Stuart, FL
Vehicle:BugI w/ 07 STi Swap www.TriStateTuners.com |
so far it seems like the sti dccd unit is not plug and play for an sti tranny in a wrx? thats a shame... i am interested to see what xplane develops or what the other options are out there...
lets please keep the flow of info going here... |
05-30-2006, 06:42 PM | #5 |
Vendor
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Location: Tempe, AZ
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This guy is the best for both manual or specific maped dccd!
www.rocketrally.com |
05-30-2006, 06:47 PM | #6 |
Top Scoob 006
Member#: 14424
Join Date: Jan 2002
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Location: Stuart, FL
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hooooly crap. i'm sure those rock my socks, but i think i'm looking for a more affordable solutuion.
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05-30-2006, 06:51 PM | #7 |
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Bryan is this thread for me?
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05-30-2006, 06:56 PM | #8 |
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canadian dollars would have been abetter deal 1 year ago!
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05-30-2006, 06:59 PM | #9 |
Top Scoob 006
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you know me d, just doing my homework... its for you, and its for huff, and its for me... dont think huff or i are planning on any immediate purchases but i like to over-research my mods ahead of time and since you're in a bind might as well get it all figured out now.
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05-30-2006, 06:59 PM | #10 |
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Options as I see them:
<----no expert, but thought about it. 1) integrate the OEM STI parts necessary which includes the wheel speed sensors, steering pos sensor, g sensor, abs, rear diff, tps, and more I am sure. Lots of dollars according to those that have done it, but if you are really serious talk to tom of kartboy, I thought he had it done in a Forrester. I could be wrong though 2)Neetronics controller. That's the one from Rallispec I believe, its $$ and more than you want, but it sounds like it's pretty close to plug and play once they setup a map for you. 3)custom one built by enthusiast. their are a couple on Ebay occasionally, and one or two people on here that make them. Can be really cheap, and can have inputs like tps and vehicle speed, even lateral acceleration if you wanted I suppose. Reading assignment: http://forums.nasioc.com/forums/showthread.php?t=872902 http://forums.nasioc.com/forums/showthread.php?t=927837 http://forums.nasioc.com/forums/showthread.php?t=951167 http://forums.nasioc.com/forums/showthread.php?t=847303 |
05-30-2006, 07:10 PM | #12 |
Top Scoob 006
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hmmm $399 and it replaces the OEM Module completely? so you install it onto a bare 6 speed and it includes the sensors and the brain to do all that... interesting. i'll do some more homework on it now.
how do the homebrew controllers compare? it seemed like one or two of them were quite nice although not readily available and i didnt get any exact pricing. |
05-30-2006, 07:18 PM | #13 |
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IMO the neetronics is prob the best solution for saving headaches and good operation, I will be running it on my six speed. With all the work and parts involved to get the auto mode to work like OEM you will need a full STi to get all the little parts.
something to think about. the stock dccd controller can be used in manual mode fairly easy but that's no fun Ben |
05-31-2006, 01:21 AM | #14 |
Top Scoob 006
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neetronics looks like a great unit...
what about the member here who has the current manual setup working and he said he's developing a more automated setup currently? sounds like it will be a lot cheaper than the neetronics and that it will be pretty impressive... |
05-31-2006, 09:25 AM | #15 | |
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I made my own. Gotta love having a bunch of electrical parts kicking around the lab
It actually worked quite well... until the wires on the DCCD solenoid came loose. My trans came out of a burned car, so I had maybe an inch of wire on the DCCD connection to splice into. I did a real half/assed job splicing the wires together because I didn't feel like dropping the back half of the trans just to get wires in place. When I get more motivated, I'll reconnect it as it worked very well. Here's excerpts from my original post: Quote:
Last edited by Bayley; 05-31-2006 at 09:30 AM. |
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05-31-2006, 10:47 AM | #16 |
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Bayley, thanks for posting that up, you were one I was thinking about when I said custom but I couldn't seem to find it in my time searching.
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06-01-2006, 05:26 PM | #17 |
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I make and sell the homemade DCCD controllers as well if anyone is still interested. I'm the one who sells them on Ebay for $150.
If you have any questions, feel free to pm me. |
06-01-2006, 06:31 PM | #18 |
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wow great thread bryan. Since we are on topic of 6MT's, how do you put one in a wrx without changing to the R180 and brake assembly.
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06-01-2006, 08:37 PM | #19 |
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So far the way I understand it.
Spiider's controller - Completely manual. No logic based control over the center diff lockup. You set the lockup rate and the rate will remain constant until you change the setting. Set the knob to 0 and the center diff will be open. Set to 100, diff will be locked. Simple to adjust. Bayley's controller - Very similiar to Spiider's with one small addition. The TPS sensor is referenced, and center diff lockup rate can be affected depending on throttle position. So at lower throttles, the diff will be more open relative to at high throttle for a given setting of the controller. Effectively, this controller has 20 settings from 0 to 100 in 5 step increments which has different curves for how the center diff is locked or unlocked based on throttle position. For example at the lowest setting, the center diff will be 0% locked at 0% throttle, but 33% locked at 100% throttle. Not user programmable. Simple to adjust. Neetronics controller - References TPS, speed, brake, and handbrake. Basically you are able to change the attitude of the center diff to suit your driving needs. This is however overkill for 90% of the drivers. The OEM DCCD controller has the logic to analyze these references and has an internal 'map' which compares these values to each other to achieve a final lockup rate for the center diff. This 'map', so to speak, is programmed. The Neetronics controller has the the abilities of the OEM DCCD with the addition of the ablity to change these values. User programmable. Basically, all three give varying degrees of tunability of the center diff to suit your handling balance needs. Looser through the corners or tighter. Neither of them give you direct control of how much power is transferred in terms of "0% vs 100% rear". They basically give you a way of adjusting how easy it is to transfer power through the center diff. The easier it is for the center diff (open) the easier the car will turn which generally means more oversteer Spiider's - Center diff lockup rate is not affected by accel, decel, speed. Bayley's - Center diff lockup rate is marginally affected by accel. Neetronics - Center diff lockup rate can be programmed to be affected by accel, decel, speed, and/or handbrake application. |
06-01-2006, 08:38 PM | #20 | |
Top Scoob 006
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Quote:
no really, i'm serious. but since i've been doing my homework on it i can explain it to you D... its pretty simple actually. |
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06-02-2006, 12:51 AM | #21 | |
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Quote:
But listen, you gotta explain it to me before I make the wrong choice. I will call you tomorrow so you can help me choose something. |
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06-02-2006, 09:05 AM | #22 | ||
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Quote:
Quote:
I would like to add that I DO have the ability to add features into my controller such as; MAP sensor, Vehicle Speed, Brake Pedal, Hand Brake, etc… The controller I’m using has 7 analog inputs, of which, I’m currently only using one. I also have an “input capture” line that can be used to determine either vehicle speed or engine speed. Too bad the WRX doesn’t talk on a CAN bus, I’ve got one of those free as well. I played around a little with the MAP and sensor settings, but found that using “just” the throttle position works just as well. Never hooked up the input capture to the vehicle speed, although I’m sure I could have added something that lowers the duty cycle as speeds increase. Basically, it came down to the fact that using only the TPS sensor gave me all the performance results I could ask for. The DCCD in actuality is a pretty simple device. Most of the guys I know simply run a toggle switch that sends a constant 12V signal to the DCCD solenoid (locks in the ratio at 50/50). Also, my setup CAN be recalibrated / reconfigured… you just need to have the source code, C compiler for an NEC FC1+ micro, and NEC flash tool sitting in front of you! So yeah, I guess it’s not re-configurable. Bryan, I haven’t forgotten about ya, trying to put together another controller for you to try out. Finding all the parts to make the wiring harness has proven to be quite the challenge this week. |
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04-27-2007, 01:36 PM | #23 |
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Subscribe
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09-26-2007, 11:38 PM | #24 |
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Disregard...
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09-26-2007, 11:40 PM | #25 |
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Quick question:
I have the stock DCCD control brain, thumb wheel and manual switch. All i need is the harness to and from each of these. Is it possible to make one? Buy one? or is it a complete waste of time and just buy something premade? |
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