SCT Problem - Ford Powerstroke Diesel Forum

6.0L Performance Parts Discussion What has or has not worked for you?

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post #1 of 12 Old 03-04-2012, 05:38 PM Thread Starter
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SCT Problem

Ok so I have an x-cal 2......my problem is that I cant seem to find the correct tire revs per mile......I have 35" bfg all terrains and I have tried every setting from 585 to 605 and nothing is correcting my mileage or speedo problem, I just finished a trip that was around 135 miles according to my gps and map-quest but my trip mileage only read around 115 miles for the trip.....my question is that is anyone on here running these tires and found the correct setting to make my mileage and speedo accurate again? Thanks in advance

Shawn

2004 XLT -
Leveled with 35's
Studded with gaskets
EGR delete
Stage 1 Powermax
4" straight pipe
Custom tunes from Eric and Matt

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post #2 of 12 Old 03-04-2012, 05:46 PM
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The Xcal2 doesnt correct your speedo. Just your shift points.

Whats your exact tire size?

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
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post #3 of 12 Old 03-04-2012, 06:02 PM Thread Starter
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I have the 315-70-17 BFG All Terrains.......but if the x-cal 2 doesn't correct the speedo what does the tire revs per mile parameter do?

2004 XLT -
Leveled with 35's
Studded with gaskets
EGR delete
Stage 1 Powermax
4" straight pipe
Custom tunes from Eric and Matt

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post #4 of 12 Old 03-04-2012, 06:23 PM
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Nope x-2 don't correct speedo, the rev per mile is for correcting the shift points for trans.

It's best to manually measure your tires and calculate rev per mile.
Tire Revs Per Mile

You can have the dealer correct the speedo thru the OBDII or you can buy Autoenginuity to correct the speedo and have a decent diagnostic scan tool to help trouble shoot issues.

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X-3 tunes by DJ'S,QT,GH,ID. Gryphon FICM tunes, ARP studs,Stage 1turbo,ATS coolant recirc lines,Swamp's 48v ficm,coolant filter,AD2,Snow Perf stage II,EGR delete,4" turbo back straight pipe,S&Bintake,Quad "A" pillar autometer gauges,Suncoast Tri Disk Conv.,Billet input shaft,Suncoast superduty rebuild kit,Trans-go shift kit,Mag-Hytec trans pan,CFM+ elbow,ccv mod,15K reese 5er,17" LCD TV/DVD,Cobra 29 Nitewatch CB
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post #5 of 12 Old 03-04-2012, 06:31 PM
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I was told to put tape on the tire directly pointing to the ground and put a piece on the ground right at the same spot as the tire. Drive forward until the piece of tape has pointed directly to the ground after one full rotation. Mark that spot with tape and measure it. I think you have to multiply it by some too though. I can't remember now. I have had to many beers

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post #6 of 12 Old 03-05-2012, 02:12 AM
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Quote:
Originally Posted by DarkBlue View Post
I have the 315-70-17 BFG All Terrains.......but if the x-cal 2 doesn't correct the speedo what does the tire revs per mile parameter do?
Set it to 600 per BFG

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
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post #7 of 12 Old 03-05-2012, 12:26 PM Thread Starter
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Thanks for the clarification guys.......Does anyone know how far off the speedo is with 35s?

2004 XLT -
Leveled with 35's
Studded with gaskets
EGR delete
Stage 1 Powermax
4" straight pipe
Custom tunes from Eric and Matt

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post #8 of 12 Old 03-05-2012, 12:51 PM
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Quote:
Originally Posted by DarkBlue View Post
Thanks for the clarification guys.......Does anyone know how far off the speedo is with 35s?
It will be about 3mph slower than what you're actually going.

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
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post #9 of 12 Old 03-05-2012, 01:00 PM Thread Starter
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Dave - Thanks a ton for your instant answers to my questions

2004 XLT -
Leveled with 35's
Studded with gaskets
EGR delete
Stage 1 Powermax
4" straight pipe
Custom tunes from Eric and Matt

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post #10 of 12 Old 03-05-2012, 01:11 PM
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No problem man

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
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