bentz69

*Update post #29 with another dyno session after installing headers*

Wanted some baseline numbers and comparision between the stock tune, eurocharged V6 and V7. Gives a baseline before I install headers and the flex fuel kit.

Car- 2014 507 ed
Mods - row boxes, afe filters, 2nd cat and resonator delete w/straight pipe

We did 2 pulls with each tune(Stock, V6 and V7). I started with the stock tune for 2 pulls, then loaded the v6 tune and had two pulls, and finally v7 for two pulls. All runs were done in 5th gear and over the course of one hour.

Conditions - 90 degrees F, 52% humidity, altitude 4500

Results (Uncorrected)
Stock 1 - 423whp 400wtq
Stock 2 - 428whp 400wtq
v6 run 1 - 430whp 401wtq
v6 run 2 - 430whp 401 wtq
v7 run 1 - 421whp 410 wtq
v7 run 2 - 437whp 413 wtq

Results (Standard Correction)
Stock 1 - 435whp 411wtq
Stock 2 - 441whp 412wtq
v6 run 1 - 442whp 413wtq
v6 run 2 - 443whp 414 wtq
v7 run 1 - 433whp 422 wtq
v7 run 2 - 451whp 426 wtq

All runs went to 6800 on tach except v7 run 2 which went to 7500. Graph didnt exactly correspond with the tach but it doesnt matter.

So we appartenly have a strong stock motor but not a huge difference between tunes. Obviouslly the increases in hp and tq are evident but minor. With that said, if you look at both of the runs for the v7 tune, from 4500 to 6000 the a/f is certainly richer then v6 and even stock. Theres definitly room for improvement there.

**Response from Jerry at EC - "tunes NEED at least 5 minutes of driving to start the adaptation process again.
We have to cruise at 30mph for 5-10 minutes some days to get the car making power. With a little more adaptation time V7 would have made 10whp more"**

Since I was strapped to the dyno and paid for an hour, I wasnt going to do a drive cycle on the dyno let alone the street.

At the end of the day its just numbers. Ultimately have 2 goals.
1)500+ whp 450+ wtq
2)high 11's with a 121-123 trap

More to follow....

hachiroku

finally! a PROPER post! i see no unicorns and nonsense here.

skratch77

It's crazy I see people posting how amazing there cars feel after tuning and I just did full long tubes without cats and I'm like it barely faster on the but Dyno lol

hachiroku

long tubes since they're larger tubing will decrease lower end torque but add power up top. since power is linear and added gradually you don't necessarily "feel" the difference.

Infiniti

Nice post OP and well documented.

No need for the unicorn pun, all my stuff was documented correctly and my numbers were proven with all the conditions as well as a few others on here. EC keeps pushing forward

skratch77

From memory you made 476 uncorreted and I'd be happy with that on my car.

Just sucks losing the torque from 2200-3200 I should of went with smaller primaries but at least my car is ready for stage 3 now

NotABaller

Think of the bright side: bigger pull, more peak horsepower, less $$ spent on burning rubber when pulling away from stop lights

Celicasaur

That's nothing that a good tune wouldn't be able to remedy. I wonder how much effort is spent refining tunes for part throttle and low rpm areas....probably not as much as we'd like because top end WOT figures sell tunes.

Sometimes if you want a job done properly, you have to do it yourself

AMGonFire

somthing must be wrong with your car or your butt dyno needs recalibration. The power increase after catless headers for me was amazing. I feel like I noticed it more then when I went tune only. How do you not feel 40 plus more to the wheels that's substantial. Op thanks for the post. Interesting how there was only a slight change for any of the tunes over stock. There very well could be an adaptation phase like they said.

kimeran

There definitely is an adaption phase.
When I did a tune on my car, we didn't remove it off the dyno. But with each pull, the car kept making more power.
Eventually it started leveling out, and my tuner told me it won't make much more power than that.

bentz69

I can certainly say that I feel no difference between stock and either v6 or v7. I can see people with a p30 car saying the tune is night and day. That I can believe. But coming from a 507 edition, I dont feel anything.

Thrilla

Thanks for taking the time to set up the comparison and posting the results. You have a strong motor to start with, and I'm not surprised the gains were minimal.

Infiniti

You know you're my homie but you're I'm not one of the guys who this is my first amg as its my 3rd even less first time modding one of them, headers was legit night and day. Maybe you need a EC tune

I am Jeff

If you're adding headers to your car, you should have a significant power increase. If you are not feeling any power increases, you should definitely check for exhaust leaks on your install. That might be the root cause of your power loss.

skratch77

here is your unicorn v7 Dyno Uncorreted that you sent me.your Dyno shop is using a 1.05 cf std and is insane to inflate the numbers by 5% and you know you dynoed your car cold.we all do it to post our highest numbers.

You lost a **** load of low end from 2k to 3500 where the car wakes up.

I'm running bigger headers than you with 2 in primaries that kill my low end even more than yours.

Im trapping 118 tune only and gave an honest review of my headers.if I could go back I would just delete second cats and call it a day at 450whp.

hachiroku

hahaha 1.05 correction factor

MBNRG

The FI Headers that you recently installed also utilize the same Tri-Y design as MBH Headers, which IIRC, are known to lose a bit of Torque down low. This may also contribute to the loss of Torque you saw above

bluefootedbooby

Is the loss of low end torque discussed in this thread specific to the FI headers and MBH? Does that happen with the MHP/ARH headers as well?

Cozy

I can't say that I had anything as severe with IPE headers, which are 4-1.

bentz69

interested in this as well....looking at ARH myself

but I really think this could be solved with the tune. Leaning out the a/f in this area would help (assuming its not running lean already)

BLKROKT

This ^

My EC V5 was running rich, as you'd expect for an off the shelf tune. Jerry worked on a few versions and leaned mine out, and I have great power throughout the rpm range. AFR is around 13.2-13.3 at WOT at the top of 3rd. Running MBH headers.

skratch77

Do you have your Dyno on hand because we have almost identical setups.you also have a p31 right?

I thought you had cats thought,can you clarify your exact mods on the car

rene_gts

Guys running V7 - is it just me, or does this tune drink A LOT of fuel? I mean like a lot... Compared to my stock car, when I was really pushing it and driving like crazy I got around 23l/100km (10 MPG) and now yesterday I got 30l/100km (7 MPG). Even when I'm not pushing it that much I can see my car averages about 3-5l (1 gallon) more fuel.

BLKROKT

No dyno. I have a wideband AFR gauge setup (Innovate).

Yes P31. I have a lot of mods, some are relevant here and most are not. 44O kit and 180deg thermo may make a difference, who knows. Do all the Ultra underbody braces make a difference with how the car hooks? Don't know that either. Same for CF driveshaft but that wasn't on for my best runs. The basics for my best runs are:
MBH headers w/ 200 cell cats and X-pipe, straight pipe back to OE mufflers
EC V5 "race" tune w/ Sunoco 250GT gas
Carbonio air boxes (reflective heat taped) w/ aFe filters
Cold air intake
Weistec colder plugs gapped at .040
275 MPSS tires at 24psi
H&R springs

skratch77

Ok got it!

Do you have the factory rear h-pipe or just straight to mufflers?