darren_dallas

I thought I would see if anyone else can post their dyno graphs from their stock vehicle and their modded vehicle. I'll start by posting mine. I'm most interested in the stock dyno graphs so I can see what type of HP/Trq numbers others are putting down and compare to mine since it sounds like I may have a slower stock E55 than some of the other people on here.

This dyno graph was before my pulley and header upgrade and I still need to get back to the shop and get the post-mod dyno finished. This dyno was done on a dynojet 240 (at least that's what the lady thought it was) and it was 107 degrees in the bay area with no fan running on the car.

It would be great to see some other dyno graphs from stock and modded pulls. If you post the modded dyno graphs please be sure to post the stock graphs if you have them so we can see the results. When I look at my Air-to-Fuel ratios I wonder if I should be concerned. I have read it should be in the 11.6-12.0 range and for a some of the pull it's above 12.5 and when I hit 6k rpm's it's below 10 (which I understand you may want it slightly richer at higher rpm's to protect your engine).

jcanabal

NO FAN????????

darren_dallas

I know, I've been told on here they should put a fan on it. Now help me out here, is the fan to try and cool the engine or to simulate the air rushing into the front intakes?

c55m8o

Where's the "all of the above" checkbox. ...not simulate .. truely =does= provide air to the intake.

I just had my car dyno'd today. 4 foot diameter cowel'ed fan about 8 feet away from the front of the car ... it's a =must=.

darren_dallas

Thank you c55m80. I guess Dallas isn't the hot spot for tuning like I hoped it would be. I've called 3 different places and none of them use a fan. Geez...I'm going to keep searching.

c55m8o

Oh man ... Dallas? I guess with all that heat, they figure, what the hell's the use in trying to cool it down ... nothing's gunna work. Just kidding. :p Hope you find a better place.

BTW ... E55's make mad power to the wheels. My C43 w/a (W210) E55 motor's just shy of 300hp to the wheels. While I truely love it off the line and into second. The power of the new E55 would be welcome to me in 3rd - 5th.

Jakpro1

Guys at Klee told me that no fan not only adds heat without proper flow, but also robs power as 100+ mph air flow is a decent "ram air" into those intake tubes. You lose that ram air effect and and thus a certain amount of hp without a good high flow fan....ECU supposedly does pick up on that, and adjust slightly.

medici78

Were the numbers corrected?

darren_dallas

They didn't say it was corrected for anything. The only thing they said was they have a very conservative dyno and that theirs usually reads 15-20 hp less than other dynojets

What should they be correcting for?

Does anyone else have their dyno sheets from their stock cars? Come on folks, surely someone has their graph so I may compare the curves and air-to-fuel ratios.

Jakpro1

Once things calm down a little for me.....I am gonna get mine up on the dyno. I'm near a mile up so mine will be skewed anyway....but I just gotta see.

lbE55

Mine before mods, with fan.

DerekFSU

Darren, as you've seen, dynos are NOT very consistent. Be it fan speed, calibration, age of the machinery, elevation, or operator, they're always different. Include in that equation that the same exact car will vary for whatever reason and dynos are just nuts. But, you do have the proper perspective in my opinion. They're best use is for baseline numbers and post mod numbers to show improvement and to allow for tweaking. Just make sure to use the same dyno.

With that being said, my car seems to be on the lower end of the stock dyno spectrum- 403hp and 442 lb/ft.

darren_dallas

IBE55, those are some great numbers. Can you share with us how Evo setup the dyno and whether they used a fan, how hot was the bay where the dyno is performed, etc?

Also, you're air-to-fuel seem much more stable than mine. It looks like from your graph that 11ish for the a/f mix produces good hp and trq numbers. Thanks for sharing...this is good stuff.

darren_dallas

Derek, you're right. Looks like dynos are good for comparing my own car to itself unless I were to go to the same dyno shop as the person I'm comparing to as well.

Where it does help me though is on the a/f ratios. I learned a lot from IBE55's post with his graph as it looks like his a/f shows a much more consistent mix across a broader rpm. I should definetly get some custom ecu tuning as I'm sure it only became more pronounced after my mods. I'll find out soon. Unless I have a flaky MAF sensor???

On another note, it appears that these beasts stock do put out more hp than is stated in their marketing material (I know people have said this for some time). Using my dyno and a 21% drivetrain loss (391/.79) means that I have 495 hp. This would also mean IBE55's car has 536 hp. Could this be right, or is this just once again a difference in dyno types, area of the country, etc.?

lbE55

I can only tell you what I know, no other specifics: Fan was used; don't know the temperature in the bay; dyno was performed at EvoSport at their shop in Huntington Beach, CA.

darren_dallas

IBE55, I would love to see your post mod dyno graph. I bet it's freakin' crazy...can you post that as well?

Jakpro1

Here is mine, but as I mentioned in other posts....it's the Kleemann Dynomet. It does all these calcs to get a crank hp....even they will tell you it's certainly not Gospel....

Least you can get a look.

darren_dallas

Jim, that's a crazy chart Can you go to a local shop and have another dyno performed to get RWHP? Dude, I will pay for it...I'm very curious what it will show (not that you need my money, you're probably wicked loaded, I just would like to see what you're laying down on the road).

Jakpro1

I am actually afraid of having it dyno'd here....being 4300ft and all. Then again, that dyno is in Colorado Springs...something like 6000ft so now that I think about it....maybe I am gonna do this.

I just gotta know.

Hope I am not bummed with the results. Any guesses as to what a Klee stage 2 should lay down at the wheels.....

04E55 AMG

I agree with your ideas about Dyno's and how they vary. The 1/4 strip is the best way to measure how well your car is doing. My best pull on the dyno with the K2 mods was 480 RWHP and 530 RWTQ.

darren_dallas

Worried?? You? You're going to put down an awesome number, plus you may have altitude, but you don't have 95+ degree heat with humidity. Look what 04E55 is putting down. You have to find out...heck, I'm dying to know myself. Can you go on Monday?

c55m8o

How are you all getting the readings from such low RPMs like 3.8K and {gasp} 1600rpm??? I just did had mine dyno'ed and the graph is only from 4th gear above 4600rpm... problem with downshifting trying to get a reading below that.

04E55 AMG

I assume I am close to Jackpro's numbers at the crank. I think rule of thumb is you add 100 to each number. That would put me at 580HP and 630 TQ.

darren_dallas

That's what I want to know as well. It looks like some of these show peak torque in the 3,000's rpm range. How did they do that?

The shop I went to (graph posted at the top of this thread) took about 4 pulls before they were able to start recording due to the car down shifting to third. Finally they figured out they needed to move through the gears easy and when they got to fourth gear they should push on the gas a little softer as they worked their way down to full throttle then mash the gas after they felt they were past the point of down shifting.

darren_dallas

I wonder if the place where I've had the dynos done can just start from first gear and work their way to fourth? Would there be any harm in doing it that way?

How does evo do it?