Howdy, I just started datalogging my 2006 S65 using the Torque app on my phone using the bluetooth OBDII adapter. I was amazed how well it works for somehthing that cost 20 bucks.

I have only datalogged a total of a couple minutes but I was wondering what kind of boost levels and Intake air temperatures you were seeing. I was getting about 16.9 PSI of boost and about 120 to 130 degree IAT's when cruising on the highway.

What kind of values are others getting?

 

Hey -

I'm looging with Logworks from Innovative, via my iPhone. Here's a thread, I have some results in. Lots of logging as I was trying to sort out some issues:
https://mbworld.org/forums/sl55-amg-...ed-sl65-3.html

Jay

 

That was great information, thank you. At the end of the post you state you replaced the fuel pump and the coil pack. Did you do a fuel pressure check after the replacement, you had 52 but what did it go up to? I just had a coil pack changed for a #9 misfire recently, perhaps there will be a difference. I will try to do some additional datalogging and get more data. On your runs you stated that your boost went to around 20 and then tapers off to 16ish at the top of the rev band, sounds like serious proof the turbos are on the too small side, unless it is all ECU controlled.

The graph you showed shows that you sit at about 16 PSI all the time on the stock ECU program.

You wrote the information below but the graph tells a differnt story, can you elaborate on the stock boost differences of 16 (graph) vs 19.55?

More interesting facts, the following is the average boost:
Before Broadway Tuneup avg: 19.55psi from 3680-5150rpm
After Broadway Tuneup avg: 20.56psi from 3680-5150rpm
After tuneup w/new SD tune: 22.69psi from 3680-5150rpm


I too feel my car traps a bit low. Its best is around 117 and the last time I went out a couple weeks ago it only ran 116ish with good weather. Perhaps the coil pack will fix it? I will look for the fuel test port and put a pressure guage on it this weekend.

 

Yeah, the shop checked the FP afterwards, but can't remember what it went up to. I think MB minimum spec is 54 or 55psi. I'll check with them and update the thread.

Regarding the misfire and coil pack, I never felt anything - but it was obvious the car wasn't making power. And you can see in the thread, Marko stated how much of an impact a bad coil pack can have.

You're right on, the OEM turbo's just cannot hold significant boost to redline. That's a big driver for what Speedriven is doing with their turbo upgrade. Solid boost right up to the end.

Oh...the stock curve vs. all the others. Well, the stock curve is with my ECU still with the OEM tune on it. All the other curves and the 3 average boost notes I have are with a re-flash from Marcin @ Speedriven, hence the differences in boost.

Is that what you were asking?

Jay

 

Thanks for the info. What I was asking is you stated you were running @19.55 psi when you dataloged on the stock ecu but your graph average shows @16 psi. Which one is correct? I am wondering if my car which is making around 16 to 17 psi is correct.

 

Ah...sorry...now I'm with ya. When I said I was running 19.55psi that was the average boost from 3680-5150rpm on the 1st Speedriven tune I had (not stock) - but BEFORE Broadway Performance did an OEM tune-up: new coil pack, 24 new spark plugs and fuel pump.

Jay

 

That makes more sense. I will try to datlog some runs shortly and see what they look like. The car does feel better with the new coilpack. Do our cars have a single fuel pump or multiples?

 

After several datalogging trials it appears the boost goes up to about 17.3PSI at 3800 to 4200RPM and then falls off pretty darn fast to about 13 PSI at the shift point around 6000RPM.

It sure makes me think there has to be some huge power to be gained by keeping the boost at 20+ PSI like your runs indicated (Philly). Were those pump gas values or 100 octane?

 

Yeah, the fall off is pretty steep. Even on a tune, you'll notice that it's really starting to run out of breath around 5100rpm on. But that's due to the stock turbo's.

Those runs I made were on 93oct. The track here is finally opening up, hopefully I can get out, throw in some 100oct and make some passes...logging of course

Jay

 

Thanks for your inputs, I appreciate them.

 

So Philly, are you a Pat's or a Geno's fan?

 

Actually....I like Jim's on South Street!

Jay

 

gents, if my smart phone ain't that smart (business owned blackberry, quite dumbed down) what else can I use to datalog my S65? Does someone sell a compatible device you know of?

 

Hmm...honestly, I haven't looked much beyond Innovative LogWorks. However, you can also hook up a laptop to the OT-2 logger that plugs into the OBD port. Granted, not as convienent as using an iPhone...but...I suppose you could try to tuck away the laptop and log direct to it.

Jay

 

Next time I am there I will have to try them out.

 

Shoot me a message next time you're in town

 

Will do.

 

Pat's is worth the trip from AZ for me!