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Figured I could get an honest anwser here , does anyone know what speed
mph is at 4,000 rpm in top gear with 3.73 stock tires . my guess is 130 140
but I just was wondering .
Good question. Back when I had the Edge Juice Platinum I set it for MPH as one of it's gauges and hit an open stretch in Okalahoma. I don't know what RPM I was running, but I saw 128 mph before I backed down. It still had more to go too.
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LOL--it's over 130 by GPS. It won't be exactly what it figures to on the MPH calculators because you have slip in the tranny and torque convertor, but 4000 rpm's figures around 140.
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I look at it like this: The advice is free and you get what you pay for; use it or dont my truck still runs fine. From a very well respected friend....Thanks
that's what I thought these trucks pull so hard from 90 plus , on my way back from vegas yesterday thru an open section with no other cars around I was trying to keep up with a lamborgini he punched it at 80 and so did I and he only got about 300 yards ahead and my truck was hangin up to about 4200 rpm before I backed of , it was not smart to do but the guy in the lambo was scratching his head a little .
unbroken was running 4200rpms with 32 inch tall tires on 22's with 3.73 gears thats lowered alot and at 4000rpms he calculated he was running like 144mph or something like that, so add another 200 rpms and he was probably over 150, when he was racing a mustang. LOL
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2004 F-350 CC LB Lariat FX4 6.0L Dually 4.10
2006 Chrome Package Front End With Steel Cowl Induction Hood
SCT Xcal 2 By Doug And DJ
Silverline Dual 409 SS Exhaust with 6" tips
Airraid Intake
Autometer Carbon Fiber Gauges
Dynoed at 394RWHP/720RWTQ January 2006
I've been over the $1.00 mark but started wondering about those stock tires that are NOT performance rated... and chicken out...
but I will tell ya this - properly tuned with locked tc and limiter off, these things will get there WAY faster than ya think
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None of us in here are too 'smart', BUT, we have soooooo much more fun!! 
