Joined

·
890 Posts

The tune made about 10hp and 12 ft/lb torque. And by the way the 5.7L was making 330hp to the rear wheels stock. Now at about 16% driveline loss you do the math on how under rated 370hp is.

1 - 2 of 2 Posts

Joined

·
890 Posts

The tune made about 10hp and 12 ft/lb torque. And by the way the 5.7L was making 330hp to the rear wheels stock. Now at about 16% driveline loss you do the math on how under rated 370hp is.

Joined

·
890 Posts

So I now have the dyno sheet in front of me. It’s a little hard to read as the marks very some. When you rate hp, it varies across the rpm range, so what I look at is constant average gains, and peek gains. Marketing will find the one point on the graph where there is a maximum change, but that’s irrelevant if the overall majority is less. So Id pick a tune with +10 hp average with a peek change of 12 over one with an average +8 and a peek of 15 at one point.

Now, when I said it increased 10hp, what I was looking at is the max hp, and the average. Most of the rpm range above 3500 rpm is +10. The graph doesn’t show much around 3000 or down. The max hp at stock was right at 330 and tuned is 340. Its maybe 3 less on both, but its exactly 10 apart.

The tuned curve peeks power at a lower rpm than the stock tune, so it makes more power quicker by about 200 rpm. At 4000 rpm there is a difference of about 16, and 4100 rpm close to 17. But to say its 16 or 17 more for the 2010 tune is probably not a good analysis, yes it does peek to right at 17 hp more, but on average its 10-12 more. From 4000-5000 it averages about 12 though

What I did notice with the 2009 tune from about 0-4500 rpm the a/f ratio was nearly identical, and the power was nearly identical from the bottom of the graph until over 4000, then it started helping around 4500+ After the tune it starts leaning out at 3400 rpm, and progressively leans until 5700 rpm. Stock is just under 12.5:1 and at 5700 rpm the 93 tune is just over 11.5:1. It slowly leans out as it approaches redline.

The torque is where it shines though. They turned off torque management and that helped jump torque even more.

At 3350 rpm it has 350 ft lb torque to the rear wheels. Stock was about 342. At 4000 rpm stock was 350 tuned is right at 372. Stock peek was 4400 rpm at 360 and tuned peek is just under 4400 at 372. The increase in torque decreases from 4500-5600 on the chart, and it all drops down after that, probably where they let off the throttle, but a/f goes to 5600. At 5000 its still about 12 gained, 4600 15 gained.

So average hp is up 10-12 and torque 12-15 above 5000 rpm both are about 10 increased and the difference becomes a little less. At 5250 rpm both hp and torque #'s match, and the tuned increase is right at 10.

Some of the numbers are a bit rough as the change isn’t exact and I don’t have the software to click on it, so don’t take these numbers as 100% accurate, but they are very close.

1 - 2 of 2 Posts

Join the discussion

Charger Forums

ChargerForums to connect with the Dodge Charger community to discuss SRT, Hellcat models, maintenance, mods and more.

Full Forum Listing
Recommended Communities

Join now to ask and comment!