Attachment shows how it looks now.

also i overlooked the turbo part... doing a turbo on a vag me car is not easy. they have a hard load limit and no matter what you extend irl axis too it will never to past 110%ish. as soon as it hits that load cap it will run lean pull timing and slam the throttle shut. you have a few options for this and if this is a non manual gearbox the trans will need to be tuned too otherwise torque limiters, etc. in the trans will cause limp mode hard shifts, slips and or failure. back to the engine side... you need to find the hard limiters in the file to increase the 100% capped limit or you can under scale the maf to make overhead for boost. both methods require a larger maf housing. the stock maf at least in a 24v and a 12v i did stopped reading after about 4.7v i ended up using a 4inch housing. another way that you could tune it is in application mode but i always had tons of issues with cold starts, idle, tip-in smoothness etc. requires tuning backup tables and the end result is still shit.

if you can provide more info on the setup im sure other forum members can chime in and help too. few things to start out with is what are you using for logging, whats your primary lambda configuration, and how much experience do you have with na>fi vag conversions? 

First of all, thanks for OLS map file and very informativie responses. This is where i'm at :

Me and my wife got Porsche Cayenne 2004 about year ago and we decided to have some fun with it. We have zero experience of turbos or tuning in general. This is first i'm ever looking into ECU maps. I have KESS available and that was used to read my current ECU software. Current configuration is (we already popped one piston, and pulle engine out, so this is part 2 going now :

- Turbo (0.5bar is what we wan't, currently goes to 0.65bar)
- WB O2 sensors (stock) in exhaust manifold (LTFT, STFT seem fine)
- Larger bosch injectors 06A906031J. These output around 25-30% more than stock (this because of E85)
- Only E85 is used
- Stock secondary cat fitted
- Stock MAF (yes, it clips at high rev)
- Intercooler
- No ECU modifications

Car runs fine, there are no real issues with part throttle or anything. It's "OK" and it's much more peppy than stock, much better to drive actually. I have been driving it for few month and most of my issues are caused by shoddy work i made with exhaust etc.

However, we ended up on a dyno and we can clearly see that torque peaks at 400Nm and it feels like it pulls ignition and really hard tries to keep it limited (torque curve is really wavy). This also limits top horsepower to just shy over stock (+30 or so).

What i'm looking here, is to rise torque limit +20-30% on WOT.  And i was thinking that playing around ith torque maps would help me out.

I can confirm that sometimes when pulling hard, transmission goes to 'limp mode', in this case, it works just like normally would, but there is indication on dashboard about it. When pulling you can feel the torque limiting and power comes in 'waves'. This could be because of it actually slipping. Exact same transmission is used on a turbo s cayenne putting out near 500hp. I can maybe pull whole transmission ECU from junked turbo s cayenne, that should fix that issue if there are torque limit going on inside there.

I really need to read what you tell me and think about it.

Just to add : Stock values for this car are 250Hp/310Nm. It's exact same engine found from R32, Phaeton, Touareg etc.
 
Additional note 2 : It's not important to get this car just right, it's a project car and always will be. And when it comes to how much experience i have with VAGs and na->fi modifications, i do have basic undestanding and have done some research. I have basic undestranding how ME system strategy goes, load vs torque, ignition, fueling all that.

 

Piston failure was because of high compression ratio, uncontrollerd boost and failing/slow responding WB O2 sensor. Capping to low boost (<0.5bar) and using E85 fuel should take care of that (for now). O2 sensor was replaced of course. So it has nothing to do with actual torque limiting issue we discuss here.

Yes, it's automatic. AISIN AW TR-60SN. I will record some logs to get facts about what is going on. I have VCDS and it looks like ME7logger would work with my hardware too. I think low Hp is because i'm using E85 and if torque limiter is pulling timing, it has much bigger effect on E85 than "normal" fuel. Actually, when we drove it with normal high octane fuel (before we damaged it) it sure was MUCH faster.

Anyway... i go and get some actual data.

Interested on getting ME7logger working with Cayenne also. My Pig is sitting in the garage, mid open-heart-chain-replacement-surgery right now. When all the harware gremilns are sorted, plans are in motion to get something out of that 4.5 V8 german twinturbo beauty. I read somewhere that all early Cayennes had the same ecu, 6- or 8-cyl petrol. I have a full map pack for 4.5 V8 955 Cayenne. I'll compare it to the 3.2 file at this thread and if it's a match I'll upload it here later.

It's same ECU model, ME7.1.1. But i don't think there is anything else common between 3.2 and 4.5. For starters 4.5 is manufactured by Porsche and 3.2 by VW.