Dyno results underwhelming

[Ramsfan78]

So I did two pulls with my truck on a Dyno today. The results are kind of disappointing. Max HP 329 and Max Torque 344 ft. lbs. I was kind of thinking with my mods I'd be a little higher than that. What do you guys think?

 

[JJK]

Makes you wonder what 395 at the crank translates to RWHP

 

[Ramsfan78]

Makes you wonder what 395 at the crank translates to RWHP

I know theres quite a bit of dt loss but damn. If I'm only pulling 329 with mods, how low would it be without them.

 

[ExpressRules]

You could try to go back to stock tune and do another run to determine difference between stock and Hemifever Tune. That would unlock one piece of the puzzle.

 

[JJK]

I'm hoping to get mine on a dyno next week! I will post results here! And it's never been on a dyno! ever I'm curious!

 

[charonblk07]

That does look about right if you've got the 6 speed and 4wd with your current mods. Your gear ratio and tire size are also factors if you're just chasing a dyno number and without a set of headers you're a little choked up on the flow with the stock heads. The most important thing to know is that a dyno is a tuning tool so if you're just doing it for bragging rights then you can easily change a few things to get higher numbers.

 

[Ramsfan78]

That does look about right if you've got the 6 speed and 4wd with your current mods. Your gear ratio and tire size are also factors if you're just chasing a dyno number and without a set of headers you're a little choked up on the flow with the stock heads. The most important thing to know is that a dyno is a tuning tool so if you're just doing it for bragging rights then you can easily change a few things to get higher numbers.

Well this was intended to be my "pre-header" run so that I can see what the headers give me. Just kind of bums me out. I figured 350-360 at least. At this rate that's where I'll be after the headers. Boo.

 

[drittal]

The basic thing to remember is a dyno is a tool for dialing in your vehicle, not for measuring **** size like everybody thinks. They all read differently. Some are generous, some are Heartbreakers. Used properly you get a baseline and then tune to find the maximum gains. It is a shame you don't have a baseline to compare with and see exactly how much your mods added.

 

[Ramsfan78]

This is very true. You're right, I wish I had a baseline before anything was added. There was also a F-150 Ecoboost Tremor there and he pulled 321hp and 377 ft. lbs. torque.

 

[BoldAdventure]

That torque number is really disappointing. Curious to see where long tubes will put you.

 

[Ramsfan78]

That torque number is really disappointing. Curious to see where long tubes will put you.

You're telling me. Lol.

 

[N1ck]

I don't see how this is such a bad run. Don't stock hemi's lay down about 300whp stock? If so, you gained nearly 30whp with an intake, TB, muffler and tune.

 

[Ratket]

always do a dyno run in stock form so u know where u are to start.. then after some mods see where u are at.. but 30rwhp over stock ain't bad. some trucks respond differently so different mods, I saw a Chevy 2500 with the 6.0 gas motor pick up 26 rwhp from a Volant cold air intake.. just shows you how much Chevy restricted air flow in.

 

[Ramsfan78]

always do a dyno run in stock form so u know where u are to start.. then after some mods see where u are at.. but 30rwhp over stock ain't bad. some trucks respond differently so different mods, I saw a Chevy 2500 with the 6.0 gas motor pick up 26 rwhp from a Volant cold air intake.. just shows you how much Chevy restricted air flow in.

The truck is rated at 390hp @5600 rpm and 407ft.lbs. at 4000rpm. Now I now this is at the engine not the wheels and for all my searching I can't find what the power train loss is. As far as a Dyno pull before any mods, aside from a muffler and can, I really didn't plan to do a huge number of mods. With that being said, I, like everyone else on her, got bit by the bug after the first addition.

 

[Broke pilot]

What kind of dyno was it? What was the DA? How much humidity, temp? All factors in a dyno. Mustang is usually stingy compared to others. But overall, dyno doesn't matter. You want a real test, go to the track and see what your trap speeds are.
On top of all that, from what I've seen and heard, the hemifever tune doesn't really start working til you've got a set of headers. LT's and a cat delete are worth more than you'd ever imagine, and a lot of it is in the cat delete. On my '14 1LE Camaro I picked up over 14hp, 11ftlb with a cat delete on stock manifolds. (LS3 manifolds flow pretty well)
I'm sure the ram cats are not incredible when it comes to flow numbers.

 

[Hemi450hp]

Dyno numbers are like the weather...if you don't like the numbers 1 day, then go to another dyno on another day, and I guarantee they will be different.

Greychevy on here has a truck that runs 12.7's N/A, and I believe his dyno also showed only about 330-340hp. Then I have seen a couple guys claim 380-400hp with fewer mods and cant get out of the high 13's.

The key to using the dyno is to stick with the same dyno for all your runs. Do the headers, and then take it back to this same shop. You may not have a big bragging rights number to go off of, but at least it will show an accurate comparison of the mods.

 

[dhay13]

a 'ballpark' number is 15-20% drivetrain loss, which puts a stocker at about 316-335 for the newer 395 HP models. not sure but i think the 2010s are about 385-390 stock? that is 308-331. this 15-20% number was with older vehicles so i'm sure they have gotten a little more efficient. i would think maybe 12-15% now? either way doesn't sound too far off. you might have gained maybe 15-20RWHP with your mods.

curious to know where your peak torque RPM was. mine seems to pull very hard at about 3000 RPM. my truck actually pulls harder at 1/2 throttle than it does at full throttle.

 

[Hemi450hp]

These trucks only make about 300hp stock, so it is actually closer to a 25% drivetrain loss on the 5 and 6 speed trucks.

 

[Ramsfan78]

What kind of dyno was it? What was the DA? How much humidity, temp? All factors in a dyno. Mustang is usually stingy compared to others. But overall, dyno doesn't matter. You want a real test, go to the track and see what your trap speeds are.
On top of all that, from what I've seen and heard, the hemifever tune doesn't really start working til you've got a set of headers. LT's and a cat delete are worth more than you'd ever imagine, and a lot of it is in the cat delete. On my '14 1LE Camaro I picked up over 14hp, 11ftlb with a cat delete on stock manifolds. (LS3 manifolds flow pretty well)
I'm sure the ram cats are not incredible when it comes to flow numbers.

Not sure what kind of Dyno it was. How could I tell? The temp was @75 degrees and it was raining so very very humid. There was a mustang cobra there that put out 550hp! Im working on the long tubes. Just gotta gather the $. Unless I could be lucky enough to enter a contest and win and have someone send me a set like I always see others on this forum. LOL

 

[WadXpress]

Just curious what kind of intake you have? I can't see sigs on my tablet incase it is listed there. I think after I do my muffler Monday I'll have the same mods as you and will be waiting to do LTs. I bet after LTs and maybe have a new tune written it will step up the hp and trq numbers.