hamann69

I ended up going with the Active ECU that rflow had on his car. Here is the dyno. It looks like the tune needs to be tweaked a little but tell me what you think.

Stock https://mbworld.org/forums/attachmen...6&d=1207704850
Pulley https://mbworld.org/forums/attachmen...4&d=1207769515
Pulley/ECU/Heat exchanger https://mbworld.org/forums/attachmen...6&d=1210213858

chiromikey

i'm confused.

stock runs weren't started until 4k rpms or later so tq readings are probably low and pulley runs show a loss of 20hp? so pulley, ecu, and heat exchanger only netted 10hp and who knows how much tq???

edit* actually we don't know what rpms the stock runs were started at...i just realized it's a different graph.

DFW01E55

Good progression of mods and it's great the way you dyno'd successively.

hamann69

ya the stock runs had a differnt graph at the bottom for some reason. I think because I had all 3 dynos on one graph printed.

joshd

Bummer on the major power loss after 5200 RPMs. Looks like they haven't figured out the torque limiting maps? There is a good bit of top end power being left on the table.

TopGun32

basically...

ECU,pulley and HE.

10 RWHP from stock and 70RWTQ from stock (PEAK NUMBERS)

across the RPM band is probably the most benefit.
=========================================

TopGun32

just looking at the dyno's..


its probably best you don't rev past 5k on your RPM.

After 5k.. it starts making less power. Good piece of info to know.

You can call it short shifting?

hamann69

I am thinking the same. Does it look like the boost limiting software is still there?

joshd

I think you need to forward the dyno graph to AA ... they have some work to do ...

joshd

yes ... the power drops and the A/F goes crazy rich. Those are the symptoms ... look at a properly tuned graph in any of the VRP threads, power continues to increase after 5200 or at least is flat all the way out to 6200ish usually whereas yours takes a nose dive ...

hamann69

I already did. This has been there response so far "That is how the tuning is supposed to be. Starts out lean then goes richer under boost. It is safe for the car and puts down power"

joshd

Forward them some of the VRP graphs ... I know they are good folks at AA and are very well respected with BMWs at least ... they may just not have the experience with Mercedes and AMG and may not be aware of the tq limiting issue.

Even a stock car doesn't look like that, power increases almost all the way to redline. So stock tuning isn't safe? I'm sure they mean well but I think they need to be educated on this ...

hamann69

Will do thanks.

hamann69

Well I spoke with the guy that tuned my car at Active and he said he took the boost/load limiting software off. What I noticed was the day and day after I got the tune the car was running really good and you could feel the increased boost but after that it felt like it wasnt boosting as hard again. Anyone have any ideas of what might be going on? I know the software didnt get erased because on the dyno the speed limited was not there.

theeddie

bad pump turning off blower?

hamann69

The blower is defently not turning off I know what that feels like. I have the johnson pump on there but maybe its going bad. Ill have my mechanic look into that tomorrow. Anyone have any ideas of why the car wouldnt be boosting what it should?

supre55

It's almost like it is the nature of the tune, like it was not designed to be used with a pulley or the tuner was not that familiar with these cars. Seems like you should be in the 35-40 rwhp gain with tune and pulley. But then again, what do I know?

Eurocharged Rick

your A/F's are going south at the top end for a reason, could be a number of things...call me and i can give you a list of things to check...

Jakpro1

I am learning more and more how powerful the tunes can be on these cars. Not exactly to unlock magical HP, but to hurt the potential for the car making hp that it rightly has inside.

Really hard to judge the tune from a dyno. Would need timing graphs etc to really see what is happening Hamann.

Wish it was easier to try different tunes. Would be REALLY cool to pop on a VRP or Kleemann and see if the car instantly perked up.

Keep us posted.

Fikse

just looks too rich at the top end..... can AA tune you car on the dyno? renntech was able to adjust my car while on the dyno and fine tune things, here are the latest graphs

pulley, ecu, heat exchanger
pulley, ecu, heat exchanger + headers

hamann69

Ill give you a call in the morning.

hamann69

AA isnt gonna help me out any further. I spoke to barry the tuner there and he insists this is how the tune is supposed to be.

Ted Baldwin

..........another tuner soon to go out of business.

Ted

Eurocharged Rick

good talking to you...send me the datalogging tomorrow and we will have a starting point to figure out what is going on with your car...

hamann69

Will do, thanks for helping out.