Quick question about SCT tuner... Tire Size! - Ford Powerstroke Diesel Forum

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post #1 of 8 Old 04-04-2009, 01:42 PM Thread Starter
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Quick question about SCT tuner... Tire Size!

I know how to calculate it and all that, is that something I plug in or the person sending tunes does???

Thanks!
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post #2 of 8 Old 04-04-2009, 01:47 PM Thread Starter
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Also, whats the pupose of pulling those fuses before tuning per SCT??? Everyone do this?
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post #3 of 8 Old 04-04-2009, 05:04 PM
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Originally Posted by TxOutlaw View Post
I know how to calculate it and all that, is that something I plug in or the person sending tunes does???

Thanks!
You can just tell the peson tuning it your mods and your tire size and they will set it up for you. In lieu of that you can input your tire revolutions in the SCT prior to actually flashing the custom program. Think it is under the program engine - options area. Be aware though that if you are going to use one of the "canned" tunes that come with the programmer I dont believe changing the tire revolutions option actually does anything. It will let you change the tire revolutions all day long but they dont have any effect on the speedo. I changed my stock tires from 560 revs to 510 revs when I was using the "street" tune and both of them were still off by 3 mph at 70 according to my gps.

David
2012 CCSB SRW FX4
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post #4 of 8 Old 04-04-2009, 05:05 PM
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Also, whats the pupose of pulling those fuses before tuning per SCT??? Everyone do this?
First I have heard of pulling fuses? I have changed my program a few times and never pulled any fuses. Where did you read about that?

David
2012 CCSB SRW FX4
2.5" Level, Amp Steps
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post #5 of 8 Old 04-04-2009, 05:11 PM
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changing the revs on the tires does not have anything to do with changing the spedo, it has to do with the tranny shifting.

Mike




"The Iron Pig"



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post #6 of 8 Old 04-04-2009, 05:16 PM
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the whole fuse thing is helps you if you have a weak battery. It says it in the owners manual to pull the fuses. It depends which Sct you have i have the sct 3 and it took about 5 min to download the tune. if your truck is warm it might kick on the electric fans or when the key is on your radio is on, or seat warmers anything that turns on with the key and is runing and you have a weak battery it could potentially kill the battery.
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post #7 of 8 Old 04-04-2009, 05:20 PM
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Absolutely no need to pull any fuses to change tunes

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
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Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
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http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
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post #8 of 8 Old 04-04-2009, 05:43 PM Thread Starter
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Sweet thanks for all the help! Cale did an outstanding job!!! My truck is completely different now!! LOVE it!!!
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