I dyno'd my truck the other day and the only modification to the tune was to lock the car in 3rd gear.


What are average numbers for the 5.4 3v?

 

I think that is pretty much correct from what I have seen from differnt people. Good number all stock.

 

Those numbers are pretty high for stock. Its usually more in the 210-220/270-280 range. Was this done on a Dynojet?

 

Its a dyno jet (says on top of the graph)

But yea numbers do seem kinda high! Maybe a factory freak?

[Edit]
Just noticed its done from 50 to 130, which is a different way of reading power instead of RPM. I'm not an expert on dynos but I believe this gives a false high reading too? I know dynojets give high readings compared to mustang dynos, but im not sure about RPM vs Speed dyno.

 

those #'s are what people are getting with exhaust, custom tunes and a cold air intake


your Dyno doesn't jive with other trucks. You should have between 200-220 RWHP on a stock truck...essentially a 80-100 HP/TQ loss from crank to wheels.


you sure that isn't with a tune...or the Dyno guy didn't something funny?

 

I am positive the numbers are correct because I dyno'd the truck myself. Here is a graph with rpm instead of speed. Just forgot to change it when I uploaded the graph. It has no affect on the numbers reported by the dynojet. The dyno was done on a Dynojet 224xLC. It's the same dyno I have done all my cars on, its less than a year old and is in perfect working order.

 

this is a completely stock 08 5.4L absolutely nothing modified.

 

I'm wondering if this '08 has the new cylinder head with the revised spark plug. That could account for the difference. Check the engine build date on the tag on the driver's side valve cover.

 

I'll check on that. later today. In my experience I haven't seen that the new heads make much of a difference, this comes from my experience in the Mustang field. I did have 93 in the tank so I don't know how much, if any spark the stock tune will add via reading the knock sensors. I'll have to see what kind of timing was being thrown at the truck with the stock tune.

 

For those of us at work and can't see the pic, what was your numbers please?

 

What I'm thinking is the revised heads are responsible for the increased power in the '09. I find it hard to believe Ford redesigned an engine only to be placed in service in December and used for six months before job one started on the '09 fleet. If would seem to be that some of us later 2008 owners were Beta testers for the new mill. I have no proof, it's just speculation on my part.

 

249/298

 

The revised heads have been on the Mustangs since 08 just like they should be the same on the trucks. The power increase is from a slightly different intake manifold AFAIK along with some improved ECU strategies.

 

How did you lock your truck in 3rd? I have an 07 XLT 5.4L (with a couple of light "performance" mods) and I was told I'd have to run it in 2nd. Will a dyno show a difference in hp and tq if done in 2nd vs 3rd? And help me get this straight. When Ford advertises the 5.4L to have 300hp and 365ftb torque, it's at the crank and NOT at the wheel right?

 

The truck is locked in 3rd by loading a tune into my Xcal3 to not let it downshift once it gets into 3rd gear. So when it is on the dyno I manually shut off OD then shift from 1 to 2 to D and then go through the dynorun. Dynoing in different gears will change the dyno number significantly as you get a different torque multiplication number.