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  Soarer Central * Mechanical - V8 * SMT6 Piggyback ECU finally working V8 SC400 * Archive through April 06, 2006 Previous Previous    Next Next  

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Peter Taplin
Tinkerer
Vic
UZZ32 V8 Supercharged

Posts: 8
Reg: 08-2005

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Wednesday, March 15, 2006 - 07:06 am, by:  Peter Taplin (Mrfourwd) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

H Guys

My car uses a map sensor because it is supercharged, this requires a signal that represents boost and vacumn for the purposes of deflection (read Throttle) for a Normally aspirated V8 you would use the throttle position sensor that the std ECU uses. The MAP sensor is an $80.00 piece of equipment and not included in the SMT6 pricing. We do not get rid of the AFM we use the AFM signal and modify the signal presented to the std ECU to get the fuel changes we require. It is possible to learn the AFM and then remove it but for the most purposes it would not be necessary.
The SMT6 can be purchased from AVO in Melbourne, but I think Neil was going to get the Licence to sell them as well, he probably needs a few people to put up their hands and say yes to buying one because he needs about 10 for his first order.

I can provide basic Settings and start up maps for a boosted V8 ( Suit Neils Conversion ) and for an NA V8 after that it would be a matter of individually tuning the car on a Dyno.

I hope this answers everyones queries ??

Your copy on its way Neil

PT
Damien Smith
TryHard
NSW
Manual UZZ31

Posts: 406
Reg: 07-2005

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Wednesday, March 15, 2006 - 08:47 am, by:  Damien Smith (Damien) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Sounds great. I've currently done away with the AFM and I'm using a MAP sensor in the MAP-ECU piggyback as I'm converting the intake to individual throttle bodies. I was planning to alter ignition with Harry's ECU but this looks like the way to go.

I'd be going for the MAP sensor option to use that as the load input and do away with the MAP-ECU I'm running - might as well have just 1 box to play with instead of 2.

Incidentally, when I initially installed the MAP-ECU and removed the AFM I gained noticable torque, particularly at part throttle and cruising, so even for an NA V8 Soarer I think it's worthwhile.

I've expressed my interest with Neil.
Justin McLernon
TryHard
Western Australia
UZZ32

Posts: 191
Reg: 01-2006

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Wednesday, March 15, 2006 - 10:48 am, by:  Justin McLernon (Zz32) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I'm also very interested. Peter, do you know who currently tunes this ECU in WA? There is a real resistance most workshops have to tuning anything new/unfamiliar. I had a TurboXS UTEC ECU on my WRX and though it was a user friendly and tuneable ECU, only 1 workshop was prepared to learn how to tune it.
Neil Griffiths
Trader
NSW
I have MORE Soarers than Hayden :-)

Posts: 1687
Reg: 07-2005

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Wednesday, March 15, 2006 - 11:21 am, by:  Neil Griffiths (Aussiesc) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Peter is corect..I was allowed to be a dealer..But I need to make that first initial purchase.Which I have not done yet.Big outlay, and I have other things on the go as well :-)
Peter Nitschke
JunkFilterer
South Australia
GT4.0 V8

Posts: 3698
Reg: 11-2004

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Wednesday, March 15, 2006 - 11:44 am, by:  Peter Nitschke (Pen) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Neil, do you have any experience or expectations of the benefits of fitting one of these to a relatively stock V8?
Anish Varsani
TryHard
QLD
V8 UZZ30

Posts: 173
Reg: 07-2005

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Wednesday, March 15, 2006 - 03:06 pm, by:  Anish Varsani (Yomama) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Why does the SMT6 need to view O2 voltage if the stock sensors are narrow band?

Can anyone tuner with a dyno tune the SMT6 if I take them the software and cable?

Are the SMT7's much more expensive? They do speed cut.

Can the ignition coil signals be intercepted to overcome the rev limit?

Seriously considering one of these little suckers provided I can get someone with a dyno to tune it and let me watch so I can do it myself as I make mods.
Justin McLernon
TryHard
Western Australia
UZZ32

Posts: 193
Reg: 01-2006

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Wednesday, March 15, 2006 - 03:23 pm, by:  Justin McLernon (Zz32) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I'd like to support Neil and buy an SMT6 through him but he seems to have one hell of a lot of other irons in the fire at the moment!

Steve Coates from AVO sells the SMT6 in Australia. From memory, the SMT6 was not a popular choice among WRX/STi owners, but that is largely due to the number of other available (and generally superior) ECU solutions (eg Motec, Autronic, ECUtek).

Visit the AVO website at
http://www.avoturbo.com
Justin McLernon
TryHard
Western Australia
UZZ32

Posts: 195
Reg: 01-2006

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Wednesday, March 15, 2006 - 03:27 pm, by:  Justin McLernon (Zz32) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I stand corrected!

http://soarercentral.com/sc-forum/messages/441/52967.html?1142398573

GREAT VALUE! Surely there are 5 of us who want one of these ECUs at such a good price?
Peter Taplin
Tinkerer
Vic
UZZ32 V8 Supercharged & UZZ32 V8 NA

Posts: 11
Reg: 08-2005

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Wednesday, March 15, 2006 - 04:13 pm, by:  Peter Taplin (Mrfourwd) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Hi Anish

The SMT6 does not need to see the oxy sensor voltage it is just useful as a guide, fitting a wide band sensor of couse would give you an even better idea of mixture strength.
Any person with dyno experience would be bale to set this up without any issues at all and as you will already have basic maps all thats is required is tweaking, up to a max of 64 set points, 64 for fuel 64 for timing, not hard at all.
The SMT7 will do rev cut but will not control frequency fuel and the low signal output crank angle sensor as well. So this is not an option.
You could intercept the coils using a second SMT6 and control the coils based on CAS inputs but without knowing what else controls the rev cut inconsistent results or damage may occur.

Hope this helps
Anish Varsani
TryHard
QLD
V8 UZZ30

Posts: 175
Reg: 07-2005

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Wednesday, March 15, 2006 - 04:19 pm, by:  Anish Varsani (Yomama) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

MAP is shown on the wiring diagram. Will it work with a MAP sensor?
Peter Taplin
Tinkerer
Vic
UZZ32 V8 Supercharged & UZZ32 V8 NA

Posts: 13
Reg: 08-2005

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Wednesday, March 15, 2006 - 04:22 pm, by:  Peter Taplin (Mrfourwd) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

It will work with anything you can use to provide a deflection (read throttle) signal relating to load.

My car uses a MAP sensor to cope with boost conditions..
Jan Christiansson
TryHard
NSW
Soarer V8

Posts: 127
Reg: 07-2005

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Wednesday, March 15, 2006 - 07:19 pm, by:  Jan Christiansson (Janoc) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Neil, is that any benefit in my car?
Neil Griffiths
Trader
NSW
I have MORE Soarers than Hayden :-)

Posts: 1695
Reg: 07-2005

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Wednesday, March 15, 2006 - 07:35 pm, by:  Neil Griffiths (Aussiesc) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

No Jan..You already have a Unichip mate..
Damien Smith
TryHard
NSW
Manual UZZ31

Posts: 412
Reg: 07-2005

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Thursday, March 16, 2006 - 04:47 pm, by:  Damien Smith (Damien) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Peter, can the pressure scale be customised or is it hard coded? Eg. if I'm running an NA setup I won't need any positive pressure on the table so I'd only like to see full vac to 0 to get as much resolution as possible.
Peter Taplin
Tinkerer
Vic
UZZ32 V8 Supercharged & UZZ32 V8 NA

Posts: 20
Reg: 08-2005

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Thursday, March 16, 2006 - 05:17 pm, by:  Peter Taplin (Mrfourwd) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

The scale in fully adjustable so
I set mine running at full throttle so I had at full pressure full deflection to the right of the scale and I set overrun to the full left position approx 24inches all you would be doing is setting the deflection to 0 as full throttle. for an NA V8 unless you have some other reason for running a map sensor you can use the TPS signal as the deflection.
The RPM scale is also likewise adjustable to use the full 8x8 screen..

Hope this helps
Damien Smith
TryHard
NSW
Manual UZZ31

Posts: 418
Reg: 07-2005

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Thursday, March 16, 2006 - 05:19 pm, by:  Damien Smith (Damien) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Sweet. I was actually thinking of just using TPS but want to cover all options.

Big help - thanks!
Anish Varsani
TryHard
QLD
V8 UZZ30

Posts: 199
Reg: 07-2005

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Friday, March 31, 2006 - 05:15 pm, by:  Anish Varsani (Yomama) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Does the SMT6 allow the user to set the desired ignition timing value or can you only set the amount of additional timing to add to what the ECU is trying to pump out?
Damien Smith
TryHard
NSW
Manual UZZ31

Posts: 446
Reg: 07-2005

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Friday, March 31, 2006 - 05:24 pm, by:  Damien Smith (Damien) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Because it's a piggyback you add or subtract from the stock ECU's timing. You would need to run a standalone ECU if you want to have full control.
Peter Taplin
Tinkerer
Vic
UZZ32 V8 Supercharged & UZZ32 V8 NA

Posts: 21
Reg: 08-2005

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Friday, March 31, 2006 - 05:28 pm, by:  Peter Taplin (Mrfourwd) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

There is no piggyback that allows you to set the timing value (If you are refering to degrees)What the SMT6 does is take the signal from the Crank angle sensor and add or subtract time from that signal, effectively retarding or advancing the signal that the ECU see's, the ECU then sends this modified signal to the coils via the amps. The modification to the signals takes place on a map 8x8 64 points in total, based upon load and rpm this allows a high degree of control to the modification of the signal and hence the advance and retard.. So your question would be correct if it read "can you only set the amount of additional timing to add or subtract to what the ECU is trying to pump out? then the answer would be "yes" Hope this helps
Anish Varsani
TryHard
QLD
V8 UZZ30

Posts: 202
Reg: 07-2005

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Wednesday, April 05, 2006 - 04:45 pm, by:  Anish Varsani (Yomama) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

What's the easiest way to accessing the ECU? Can I just pull back the carpet in the passenger's footwell or do I need to remove the door frame skirts?
Damien Smith
TryHard
NSW
Manual UZZ31

Posts: 460
Reg: 07-2005

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Wednesday, April 05, 2006 - 05:04 pm, by:  Damien Smith (Damien) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Remove the panel under the glovebox which covers where the air-con filters go then pull back the carpet. You should then have enough room to undo the 2 x 10mm nuts at the bottom of the plastic cover to access the ECU.

I found that you can remount the ABS ECU (left of the engine ECU) lower in it's bracket which gives you a fair bit of space to mount the piggyback.

Here's how I've mounted my MAP-ECU:
http://www.v8soarer.com/map-ecu/index.shtml#Installation
Peter Nitschke
JunkFilterer
South Australia
GT4.0 V8

Posts: 4048
Reg: 11-2004

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Wednesday, April 05, 2006 - 06:54 pm, by:  Peter Nitschke (Pen) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

My carpet is very stiff due to the foam it is attached to, so I unclip the rails next to the door sills - they just pull up.
Anish Varsani
TryHard
QLD
V8 UZZ30

Posts: 203
Reg: 07-2005

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Wednesday, April 05, 2006 - 07:02 pm, by:  Anish Varsani (Yomama) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Thanks.

Ended up getting annoyed and just yanked the carpet with the air con filter cover off.

Can someone please indicate which pin is the torque converter lockup pin on the uploaded diagram?

I want to wire in a lockup switch for use when on the dyno.

I noticed a two pin plug sitting unconnected towards the firewall. Couldnt see sockets near it. Any idea what it could be? I think the wire colours were yellow/blue or yellow/black. Will take a photo when I get home.
Neil Griffiths
Trader
NSW
I have MORE Soarers than Hayden :-)

Posts: 1852
Reg: 07-2005

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Wednesday, April 05, 2006 - 07:26 pm, by:  Neil Griffiths (Aussiesc) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Hey Anish..Is yor family from India ??
Just my post office owners are Indian and when they seen your name they stated * Ahhh he is from India * !!! hahahah I said FIK.. :-)
Anish Varsani
TryHard
QLD
V8 UZZ30

Posts: 204
Reg: 07-2005

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Thursday, April 06, 2006 - 06:07 am, by:  Anish Varsani (Yomama) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Yeah, Neil, Parents from India. I was born here.

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