Installing 4.10s - Ford Mustang Forum
 
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post #1 of 2 (permalink) Old 01-16-2017 Thread Starter
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Installing 4.10s

Hey guys, probably a simple question.

I am having a local shop install the ford racing 4.10s that I bought from American Muscle. I already have an SCT tuner and was wondering if I need to have AM retune or if I can just modify the 91 race tune they gave me already?

Thanks

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post #2 of 2 (permalink) Old 01-16-2017
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Quote:
Originally Posted by DevilRx View Post
Hey guys, probably a simple question.



I am having a local shop install the ford racing 4.10s that I bought from American Muscle. I already have an SCT tuner and was wondering if I need to have AM retune or if I can just modify the 91 race tune they gave me already?



Thanks

The only thing that will need to be changed is the speedometer reading. If your hand held is capable of changing it then you're good to go and can do it yourself. None of the other "tune stuff" (air to fuel ratio and timing) will be affected by the gears or will need to be addressed.


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