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Message: <blockquote data-quote="SnakedMark8" data-source="post: 298676" data-attributes="member: 10115">Yes the NA from stock to wild can definitely benefit from a higher stall. With the 4R70W's gearing and the lock up TCs combined with the computer's infinite adjustability you can run considerable stall speeds and still be very streetable with these 4.6s. So 3600 - 3800 is not uncommon to run across on an every day street car where as back in the old days that would be considered insane. With the electronically controlled trans and TCs it's not like the old days where the vehicle barely moved until you reached the lockup/stall rpm. With todays computer controlled vehicles they can be programmed to help eliminate some of this bad characteristics. Then the TCs have evolved to a much better design that eliminates a lot of inefficiencies associated with high stall converters. In the old days they would butcher the stock stators and bend the fins which would give you more stall but cause a lot of heat. Now the higher end companies can computer design their own parts, test them on a dyno before they go into production. With the small 4.6 displacement you don't have a lot of low end torque to allow quick off the line acceleration. Going with a higher stall to get you up and into the power band allows you to leave the line so much fast that you can expect to reduce your 0 - 60 times by 2 or more tenths. You will also have some substantial decrease in track times. I don't know what your set up is but a mild mod I would go with 3200 - 3400 rpms, leaning towards the 3400.</blockquote>