Hey guys, does the 03 5.4 motor have a rev limiter in stick trim? If so has anyone ever bounced up against the max RPM on it? Curious

 

im sure im wrong but i wanna say its right around 5,300

you can get a tuner and people have spun stock motors to 6,000 but its not recommend every day.

i got a tuner and mine 1/2 shifts at 5,500RPM no probs yet....

 

I am going to say 5500 rpm in drive and 4500 in neutral. Just so you know, the tachometers are not very precise and can be off a few hundred rpm.

 

Don't try to bypass it without getting a built torque converter - the stock converter can balloon on you if you overrev it. The engine can handle a lot more revs than the TC. I think it's 5400 for the TC but the engine is good to about 6500.

 

All good info guys, Thanks but does the truck actually have a limiter in stock trim?

 

Yes. The tranny will shift before it hits it though.

 

Unless you have it in first gear:-)

 

or locked in second doing a burn out




or locked in thrid maxing out your 140 MPH speedo and still gaining speed

 

I don't think his speedo goes to 140MPH

Phil

 

No I think you guys have me beat there but I do have an old T-Bird SC that gets it pretty good:-)

 

I have the same 100MPH speedometer that you do.
One of these days I'll get around to swapping in the Lightning speedo I have for it.

Phil

 

My speedo indicatesd up to 160 Km/hr ( 100 mph in small font ) and I reprogrammed the tire size and gear ratio so that while it still indicates metric it is actually mph. I now have a 160 mph speedo.

 

when you pasted that up in your thread, it made me want to get a metric lightning speedo and set it up the same way

 

Damn you and your blower...

 

my mach i has a 120 mph speedo. It would do it but I've never gotten close. I converted the tranny to a TKO600 this year replaced the rear end converted to rear disc got a new trac loc and regeared to 3.73 this year. I took it out and opened it up to 100 for a few seconds. I'm sure the car would do 140 now.