SINISTER

I wouldn't be spinning a stock motor past 6K RPM if I were you. The stock internals just can't handle the kind of force that kind of RPM would place on them. You keep that up and you'll be on here asking where to buy a new motor from.

jpmustanggt

Why would you want to do that?? Go buy an rx-8 if you wanna do that.

Quick Shot xMLx

Dude can't you read? Are you retarded? The redline is there for a reason. Don't go over 5800 with a stock motor unless you like blowing **** up.

Why the hell would you go over the redline, this isn't a damn Honda. You don't make any power up top and your car's going to break down. Go ahead but don't cry and blame Ford because your car is broke.

POISND U

Put down the crack pipe, bro. It's there so you know what to do to blow up the engine.

Pitt

If you have an automatic do these rules still apply? Reason I ask is cause I got LT headers, pullies, TB/Plenum and exhaust which are all basic bolt ons and I ordered an SCT from Modular Depot with the included custom tunes and with those tunes my car is shifting at like 6300 rpms. Im wondering if that was a program mistake or they usually set it at that for my mods.

ackuric

hey pitt, my auto shifts at 6-6,500 rpms if i manually shift it @ around 5,500-5,800, and when i do make it up to 6,500, only have twice, I can feel the power fade away fast after 6000...highest ive seen it shift automatically was 6,200ishi believe. I do have a shift kit installed... my avg WOT shifts in my auto are around 6000 rpm

truly 90% of the v8's produced, are made for low end torque, not high end horsepower, so revving high is pointless, its designed to do the opposite so you dont have to rev high.