SCT/EDGE - Staking & Speedometer Corrections

[COTTS4x4]

Doug - I need some help here, could you read this post on FTW and post your thoughts about the Edge & SCT and what the deal is with the speedometer corrections. Post them here and I will link to it.

http://fordtruckworld.tenmagazines.com/forums/topic.ten-id-468953-s-stacking_sct_edge_questions

Thanks man!
Scott :D

[PSDPlayer]

The SCT will not fix the speedo. Since the ABS module is what calculates the mile per hour from taking info from the rear speed sensor in Hz and using the rev per mile stored in the abs to do the math. It then sends the speed info over the network to the cluster to display the mph. The rev per mile is also stored in the pcm for trans functions. It finds out how fast the truck is moving to determine shift points. The edge modules will not control shift points or pressures directly like I can inside the processor with the SCT. You can stack a trans tune from the SCT with the edge but it has been determined to be a crazy expense. Im not a fan of all in one modules. If one part takes a crap then you have to fix the whole thing. Just get a tru speed or a speed wizard and set the speedo. Once you get too far out of whack with the rev per mile like on a 40 inch tire the processor doesn't like it. It might be "cool" to not rack up as many miles but not shifting correctly isn't fun.

[YFZ 450 Quadaholic]

PSD,
Here is my latest question from the thread on FTW:

cc from COTTS: All the sct will adjust is your tranny's shift points due to tire revolutions, no speedo.

Couple of questions, COTTS:
1. I bought the SCT 2 and the Edge Juice w/ Attitude and had it installed on my truck in March on the same day. They programmed in the tire size (37") after measuring the distance on the ground for each revolution to double check. My speedo is off by 2 mph (the factory dashboard) when traveling at 65 mph.. I have checked it by driving alonside numerous cars on the freeway side-by-side. Why is this so close if the SCT does not correct it? There are no other mods to my truck to adjust the factory spedometer. Not trying to push yours or anyone else's buttons.....but I'm at a loss here.

2. The number of people on this site who have strong opinions regarding the dangers to the tranny when using Edge products seems quite high. This obviously concerns me with the load of $ I have invested in my truck. But since I have had the SCT rev. calculated into my truck....and as you mentioned this corrects the shift points.....would you (or anybody else weigh in here) say that MY tranny under these conditions is handled by the SCT primarily and the "dangers" of the Edge shift points is not a concern for me? In other words....which programmer is controlling my tranny??? I run the Edge on level 2 most of the time because I pull heavy trailers 90% of time I drive it.
Thanks much,
(concerned) newbie from the Portland area.
-James

So I spent a total of $1,375.00 for the SCT XCAL2 and the Edge Juice w/ Attitude installed on my truck. I was told that when they were done the speedo would be fixed (on the dashboard - factory speedo) because the SCT recalibrates it. I'm still at a loss as to why my factory speedo is so close - but my bigger concern is my tranny. From what I am hearing is the SCT is controlling my tranny in my truck with the way it is set up (because the Edge is not capable of doing so).....so I should be in good shape, right? I am approaching 30K miles and have had no problems with my tranny (shifts perfect) and I have already had it serviced by a specialty trans. shop and his inspection revealed that it is in perfect shape.
I know there is a bunch of questions here but I really appreciate all the input.
Thx.

[PSDPlayer]

Who wrote the tune that is in the XCal2 for the trans control? And what is done to your truck?

[YFZ 450 Quadaholic]

The work was done by:
http://home.fastspecialties.com/
in Vancouver, WA.
My truck has only the following mods:
37" tires + Fabtech 6" radius arm kit with ladder bars.
4" turbo-back SS Diamond Eye SS exhaust with Aero-turbine SS muffler w/resonator (muffler delete; cat is still on).
Edge Juice w/attitude.
SCT XCAL2.
(stock intake)
Fast Specialties installed the exhaust, Edge & SCT on the same day last March. I don't know what tune is programmed in w/ the SCT; other than the tire size was calculated/programmed in at that time.

I take it a "tune" is a seperate entry (program) than the tire size calculations?

Should I contact them and find out if there was a tune installed; and if so which one?

[PSDPlayer]

Find out what they installed as a trans tune. Does the XCal2 say Strategy flash device on it?

[YFZ 450 Quadaholic]

ok, will contact them.
On the SCT - I will have to check later tonight....I ddin't drive the beast to work today.
Thx.

[YFZ 450 Quadaholic]

Still waiting for the info. from the shop.
The SCT says "User Adjustable OBD-II Flash Tool" on the face of it.
Xcalibrator2
Ford
9400.SCT is listed on my receipt.
That is all the info. I have so far.

[PSDPlayer]

9400 is a blank one. So they had to write the files to put them on there. I'm curious as to what they put on it.

[YFZ 450 Quadaholic]

PSD,
Here are the answers that I rec'd; thier answers are in red. (cc of email)

James,
We wrote the tune for your SCT, that’s the advantage of being a SCT Custom Tuning Dealer/Tuner. Travis and I took a look at what we tuned with the SCT, it looks like we changed the transmission shift points a bit, and “recalibrated” the speedometer. There should currently be NO power tuning in the SCT.

With regards to the statements I see below, I don’t think those are ALL from other shops, but regardless, I don’t want to say anyone is 100% wrong, however, there are some statements that are partially true, or maybe just a bit hard to follow.

“…even though the edge platinum says that they can contol the tranny infact they cannot control the tranny because it does not plug into the frontmost plug in the PCM..therefore it cannot contol the shift point directly to the tranny.
The Edge does have some transmission control, but it isn’t the same way the SCT changes it. The Edge “lies” to the computer to make the claimed “Shift firmness, and TC lock up” changes, where the SCT actually changes the computers functions.

“The SCT cannot recalibrate your speedometer...Revs/mile is for shifting purposes.
The Edge can show your actual speed on the display but NOT on your Factory speedometer.”
The SCT is recalibrating the speedometer, by measuring revolutions per mile, it isn’t just for shifting purposes. It is correct that the Edge will show you actual speed on the monitor and NOT in your Factory speedo, but that’s why we use the SCT or the Superlift calibrators.

“yes, the Edge will defuel when it senses tranny slippage…..but the problem is that the error has already occurred – and defueling is a response to the transmission having already slipped; therefore it really doesn’t cure anything over the long term. In fact it will more than likely severely damage it.”
I believe that the damage being done to the vehicle is more in the hands of the driver. You as the driver have to be responsible enough to know when something doesn’t feel right or look at your gauges to see that defueling is happening do to converter slip or EGT, or whatever else, so that you can “backdown” as well. There are safety features added to products to help if you don’t or just happen to not be paying any attention.

“The SCT will not fix the factory speedo. Since the ABS module is what calculates the mile per hour from taking info from the rear speed sensor in Hz and using the rev per mile stored in the abs to do the math. It then sends the speed info over the network to the cluster to display the mph. The rev per mile is also stored in the pcm for trans functions. It finds out how fast the truck is moving to determine shift points. The edge modules will not control shift points or pressures directly like I can inside the processor with the SCT.”
Again, the SCT is not “fixing” the factory speedo, but is recalibrating it, so to speak, because the SCT is changing all the functions in the computer. Because it is flash tuned, it writes over the whole stock tune, with whatever information we chose to give it. On your SCT, everything is set at stock, except some trans firmness or shift points, and the speedometer.

I am curious what brought this whole thing up. Do you have some particular concerns that need addressed?

Hope this helps,

Amber
-Fast Specialties

[PSDPlayer]

Just call me. 954-275-6801 24/7. There are 4 people on the planet that I would by something from. Tadd formerly from ATS, Eric at Innovative, DJ at DJ's diesel and myself. I laugh at shit like this. If the edge lies to the pcm then its the pcm that has control of the trans NOT the edge. If you don't change the tables then it doesn't do you any favors. The SCT is not recalibrating the speedometer I will put money on it. The SCT flashes the pcm, it can not alter the speedo from the pcm.

[Dissociative]

so an sct will not make speedo on dash work right?.. I thought it made a diff in my truck when i adjusted the rev/per/mile

[PSDPlayer]

Thats in the pcm for the trans shifting. The abs module sends the info over the network for speedometer info.

[Dissociative]

arrrg...i am an idiot...is my speedo right or not?

[PSDPlayer]

Wrong.