Data point pulled from the promo video:

EDIT - NOTE: This is only ONE data point - it does not tell us where or what the peak HP is.

@ 6500 RPM
Corrected HP: 425.8
Corrected Torque: 344 ft-lb

This is at the flywheel, since it's from the Ford dyno test.

 

What were the other RPM specs?

 

That was the only data point, the camera was on the screen for a couple of seconds.

The RPM was calculated from the HP formula: HP = T x RPM / 5252
which rewritten becomes RPM = HP x 5252 / T = 425.8 x 5252 / 344 = 6500

 

So you are saying that the Boss has the same output as the 2011 5.0?

 

By way of comparison, this is Evolution's chassis dyno run with the stock setup.

Assume that their measured peak torque (352 ft-lb @ 4250 RPM) corresponds to the rated torque of 390 ft-lb, also at 4250 RPM.
Evo's dyno chart shows the torque drops to ~295 ft-lb @ 6450 RPM, which should correspond to about 326 ft-lb @ 6450 RPM at the flywheel as per Ford's numbers.

At that RPM, the Boss is already running about 5.5% higher power. The real difference of course is that the stock 5.0 is already maxed out for HP, while the Boss keeps on building HP right up to 7400 RPM.

 

I may be a little slow at this late hour. Are you showing actual 5.0 dyno tests vs whatever or do you think Ford is blowing smoke up wherever?

 

The dyno numbers in the first post came from last Monday's show on the Boss, and were filmed during testing of the engine at Ford. A caveat to that is we have no idea how the engine ECU mapping then will compare to what we will get, but it should be close.

The graph I posted was made when Evolution Performance put their then brand new 2011 GT on the chassis dyno to take baseline numbers. Chassis dyno numbers are always lower than the manufacturer's numbers because they are measured in a different way. This is expected and normal.

I don't think Ford is blowing smoke.

 

Great work PTRocks. It would appear that if peak horsepower occurs @ 6,500 rpm, this engine is not at the same output level as advertised for the new Boss.

 

The dyno graph is for a regular GT. The screen shot of the 'live' dyno data is only one data point, and tells us nothing about where peak HP occurs. I have read elsewhere (can't find it now) that the Boss' 444 peak HP is at 7400 RPM.

 

Tidbit from MT on dyno test for 5.0:

 

Rrrrright...cause that screenshot is the gold, end all info on the final tune for the car.

 

Exxxxactly.

 

lmao.....

 

That screenshot is only at 6500 rpm's according to the math, yet in the Boss 302 show on the Speed Channel the other night, someone from Ford mentioned peak hp is at 7500 rpm's. That 1000 rpm difference can provide substantial hp. For example, my car gains about 16 rwhp per 100 rpm's in the upper rpm range and is still climbing strong at my 6600 rpm redline per my dyno graph (my car has FI, so it's not a direct comparison). If I went another 900 rpm's to 7500 I'd see more than 100 additional rwhp (if my engine didn't blow up!). Suffice to say that the Boss 302 isn't making 16 rwhp per 100 rpm up on the top end, but I hope this illustrates why looking at just one rpm point doesn't tell us anything useful about what the peak hp could be.

 

That's exactly what I was thinking. There was so much more room for so much more potential power.

 

Exactly, I wasn't trying to extrapolate up to the limit. Ford's said 444hp, from what I've found that's at 7400RPM. What we don't know is anything happening elsewhere on the curve. I don't recall what RPM the peak torque is supposed to be at either.

I am curious to see what the curve looks like across the RPM range, so far the screen shot is the only indication of what it might be, and then again, only at one point.

 

444hp @ 7400 rpm's and 380tq @ 4500 rpm's per the '12 Order Guide.

 

Thanks! I couldn't remember where I'd seen it.

 

So for the Boss we have:

380 lb-ft @ 4500 RPM
344 lb-ft @ 6500 RPM
315 lb-ft @ 7400 RPM (Peak HP)

I remember reading one of the 5.0's engineers being proud that the regular 5.0's peak torque and peak hp were so far apart (2250 RPM). The Boss' range is 2900 RPM, even more impressive in terms of a flat torque curve.

 

A vehicle will accelerate fastest when operating between its torque and HP peaks, so 2900RPM is great...car has a lot of range to pull!