SXGT

everything says the 2011 GT has 412hp or so. But they dyno at 436.... so what is the REAL power of the engine? 450?

pdonket

They don't stock dyno at 436....ever. lol. Most times they stock dyno around 360-370, maybe a little more or less depending.

So real power at the crank is pretty accurate at 412.

SXGT

http://www.youtube.com/watch?v=ydykiWKW6fE

pdonket

I've seen the video before so I understand your questioning my comment, but use the search on here and you'll see that nobody is getting numbers like those stock. I'm siding with the majority on this one, I don't know how motor trend got those numbers on a stock 5.0

Nuke

There have been a few recent reports of 5.0 owners claiming that they've dynoed both before and after a few thousand miles and have gone from about 360 RWHP to 380-390 RWHP, all stock. That would put crank in the 450 HP range which seems to validate the statement by some that the 5.0 is underated.

No way is a stock 5.0 laying down 436.

cam2904

I was watching Horsepower TV. On there engine dyno it did 450.

siggyfreud

There will always be anomalies and freak engines. I think it's safe to say that they engines should dyno at no less than 412, and some are seeing more.

The way you worded your question though is weird. It's like saying "Everyone says that guy weighs 200 lbs, but the scale said 230, so is he really 260?"

If they dyno at 436, wouldn't the real power of THAT engine be 436?

SpartaPerformance

That's because on an engine dyno there are no accessories attached and it's run with open intake and exhaust.

JIM5.0

In that Motor Trend vid, I cannot help but assume that when they arrive at that 436 HP from the dyno, that they are estimating what the HP is at the crank based on the RW numbers.

SXGT

Wheel power is not the same as engine power. My GT makes 220hp engine but only puts down 190 at the wheels.