ran slower with custom tunes? - Ford Powerstroke Diesel Forum

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post #1 of 7 Old 09-25-2009, 08:18 PM Thread Starter
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ran slower with custom tunes?

hey guy i was just wondering what could cause my 03 excursion 6.0 to run slower with my custom tunes. with the performance tune that comes with sct i ran a 14.9 at the track but when i put it on my xtreme street from IDP it runs a 15.3 and same with another custom tune i got from Truck source diesel is san antonio. It runs fine and the tranny does not feel like its slipping or anything.yall got any ideas?
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post #2 of 7 Old 09-25-2009, 08:33 PM
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Originally Posted by kelvash2000 View Post
hey guy i was just wondering what could cause my 03 excursion 6.0 to run slower with my custom tunes. with the performance tune that comes with sct i ran a 14.9 at the track but when i put it on my xtreme street from IDP it runs a 15.3 and same with another custom tune i got from Truck source diesel is san antonio. It runs fine and the tranny does not feel like its slipping or anything.yall got any ideas?
Track conditions?

Tune may need a little adjustment? I'm sure IDP will take care of you, by the way.

Did the truck spin off the line with the custom tunes?

Runnin in 4x4 or 2?
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post #3 of 7 Old 09-25-2009, 08:52 PM
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my thoughts too, 4x4 or 2wd... did the tires change. Reaction time, 60 ft time....hotter or head wind..............

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post #4 of 7 Old 09-26-2009, 04:17 AM Thread Starter
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Originally Posted by chvyrkr81 View Post
Track conditions?

Tune may need a little adjustment? I'm sure IDP will take care of you, by the way.

Did the truck spin off the line with the custom tunes?

Runnin in 4x4 or 2?
the track conditions have been great everytime. yea thats what i kinda figured they could just tweak it a little.
and im launching in 4x4. thanks for the quick response
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post #5 of 7 Old 09-26-2009, 04:22 AM Thread Starter
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Originally Posted by dukcaln View Post
my thoughts too, 4x4 or 2wd... did the tires change. Reaction time, 60 ft time....hotter or head wind..............
everything was realy consistant on the low end. but there was no changes in weather or tires or anything like that. just when i got there i had it on xtreme street and kept running consitant 15.3. but when i ran it on performance that came with sct it ran 14.9 a couple times then i put it back on my custom tune and it ran slower again lol
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post #6 of 7 Old 09-26-2009, 09:17 AM
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the track conditions have been great everytime. yea thats what i kinda figured they could just tweak it a little.
and im launching in 4x4. thanks for the quick response
Do you already have studs?

ID might have given you a headsafe tune. The SCT tune may not be.
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post #7 of 7 Old 09-26-2009, 10:22 AM Thread Starter
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Originally Posted by chvyrkr81 View Post
Do you already have studs?

ID might have given you a headsafe tune. The SCT tune may not be.
yea i do have studs. thats true i didnt even think about that. i will email them right now and see what they say. thanks for the help
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