RomRaider

With the oil leak fixed and some miles on the new turbo, I went for a dyno tune Tuesday after work. The tune was performed by Chad at MKC Performance, a local AWD dyno shop and vendor on a local forum I help moderate. I got permission to post the rom, and have taken a few logs since the tune. I recently let him borrow my cable and got a deal on the dyno time. My car was on the rollers for 5 hours.

I was going to post in the base maps forum, but am considering putting more work into it first. In general I wonder if I should de-tune from kill mode / dyno queen to a more daily-driver oriented tune. Or to put it another way, I know I'm fine driving around in vacuum, but as-is I'm going to be a little nervous at my next auto-x or track day. Specifically, one of the things that bugs me is the load axis aren't scaled out to my new higher values.

My goal though all of this was to change as few stock pieces as I had to. So the list of relevant mods is pretty small:

Blouch Dominator 2.5 turbo
Perrin 816 injectors (modded stockers)
Walbro 255 pump
Cobb catless DP, and custom full 3" exhaust
1.2mm restrictor pill

The best numbers of the night were 400 tq and 350 hp. They happened on different runs toward the end of the night. Afterward he worked on the dip after peak torque. This was on BP 92 octane pump gas. AFRS were around 11.5 at peak torque and tapered to 11.25 at redline. He did all the pulls in 4th gear. Here is the last graph of the night. He said the tach pickup flaked out causing the spikes at the end - none of the other graphs looked like this, but the numbers were similar.


Here is a short video of one of the early pulls (my buddy with his camera, me smiling at the end):
http://www.youtube.com/watch?v=oFalMuNVhM4

I am uploading the dyno tuned rom and three logs. The first log was yesterday morning; the other two are from this morning. Between them I'm trying to juggle good data vs. a good sample rate, so some of the parameters differ.

Thanks for reading. Thoughts, opinions, questions?

You've got a little bit of FLKC active. Upload a learning view .csv.

The little dip after peak torque is most likely due to the fact that you overboosted and the WGDC was wound down. You can tighten up control of your boost to get a smoother boost control. However, you need to log WGDC and TD Integral Cumulative. If you're not at sea level, then you should also log TD Proportional to make it easier to see the overboost.

Thanks for the quick feedback Mickey. I will need your help smoothing things out but would definitely like to. I'll do a learning view when I get home and upload it.

Hey I can mail that pill back to you as well, just use the return address on your envelope?

Here is the learning view file.

Number one thing I dont like is the way he has your boost map set up. Your boost target map is all wrong, The wastgate maps are funky and I would never tune the wastegate maps like that. I have seen it done that way and I think its all wrong and an old school way of setting those maps up. You are over boosting and you have boost being pulled wich makes your graph look that way. I said over boosting but if you had your boost maps set up correctly you could hold the 22psi a little longer and taper your boost slowly. That will keep your graph where it will look smooth. I dont like the way he has your fuel map set. He has the cl/ol delays zeroed but he left the fuel map at 14.7 to high in the rpm range and to long in the load range. Also the numbers in your fuel map are to lean wich tells me he didnt bother with the maf.
I also dont like the way he flattened out your advance maps. I know a lot of people do it and its prob ok, I just think it shows when a tuner is being lazy. Your learning view is OK at best. You should be pulling a little fuel and not adding 4 to 5 %. That plus your immediate fuel trims will have your fuel trims to far off in the wrong direction imho. On a scale from 1 to 10 I would say you got a 6 at best on the tune.

Thank you for the feedback, your comments are exactly what I am looking for.

I agree about the boost and wastegate tables.

No meth. The MAF scaling is stock, I guess because I'm still running the stock air box and inlet. The snorkus is gone and I'm using the fender well closed off similar to what Tgui did, but with a GP Moto elbow cut in half to make a shovel into the box. Anyway it seemed to be a little off when I was still stage 2, but seems even more so now. I agree it needs work too.

On the advance map, I actually prefer it flattened and asked that he keep it that way. That is mainly for ease of logging by me after the fact. I could live without it being flat if there is a strong reason to change it.

If anybody has suggestions on changes please share them. I would like to make it as close to perfect as I can get.

Are you sure you don't have ANY exhaust leaks near any of your exhaust manifold joints (cross pipe, engine attachment, uppipe).

How many miles since you last reset / reflashed your ecu?

Is your LC-1 operational?

Surely the OP's tuner would have done some short logs while his car was on the dyno and done an all around inpection on the op's car to ensure that everything was in order before he started the tune process. A thorough inspection of the op's car should be FIRST and formost the most important thing to do before starting a tune. If he failed to rule out the fact that there could be something mechanicaly wrong with the op's car and there was and he then tuned around it, then that would be a major mistake IMHO. If you are off a little on your trims and on the stock maf then I would think that the ipw was a little off. The reason I say this is that they are off close to the same across the range except for around idle. adjust ipw to get trims down a little then adjust latency a little to take care of the idle section. I would check for a leak after the turbo that might be throwing your fuel trims out around idle before I made any ipw or latency changes. A leak could have your trims out at idle and negative manifold pressure adding fuel. then when you have some positive manifold pressure you where a little richer than you should have been and the tuner had to lean your fuel map out more than normal to get the afr's that he wanted. I have seen this problem a few times and most turned out to be a leak at the bov. Maybe a crack in one of the vac hoses on the intake. This is all just thought and speculation from looking at your rom and the logs and may not be accurate info as I have not personally looked at your car. Just food for thought. LOL

I'm going to reset the ECU tonight and get another learning view tomorrow. You guys are super sleuths - it was driven by mistake for a short bit with the O2 plug missing after the tune.

I don't have any evidence of leaks now exhaust or otherwise. The car is mechanically fit.

I got the injectors close before the turbo swap, but I'm sure they're not 100% either:
topic3216.html

My LC-1 has been replaced, and I have the bits for a lighter plug arrangement. Just need to wire it up and test.

I finally got a chance tonight to open your rom.

1. Boost target is poorly setup.
2. WGDC tables are poorly setup.
3. Turbodynamics can be improved for better spool.
4. Timing should be scaled out to at least 3.6 g/rev.
5. Personally, I would increase fine and rough knock ranges.
6. I would raise rev limit fuel resume so the car doesn't stall if you accidentally hit the rev limiter.

Anyway, what's your atmospheric pressure and what type of gas do you use?

What size pill are you using. Don't send the pill back yet. You might still need it.

Are you running a larger MAP sensor? I hope so, or your ECU isn't going to catch an overboost!

I'm in the Kansas City area. This morning the atmospheric pressure is 28.91 and rising. The only gas I use is BP 92 octane.

Pill is the 1.2mm for now.

MAP sensor is stock, which is why I wanted to target 22 psi or less. I also noticed the boost limit is set through the roof.

I would like to at least re-do the boost and scale the load axis. On one hand I'm upset I spent money on this, but on the other it will be a good learning process for me (and maybe for him too).

Do a 4th gear log from 2000 to 4000 rpm. Log the following:

rpm
load direct (g/rev)
manifold absolute pressure direct (psi)
maf (g/s)
total timing (degrees)
KC (degrees)
WGDC (%)
TD Integral cumulative (%)
TD Proportional (%)
WBO2

Based upon your rom and your boost curve, I think you'll need to use the 1.25 mm pill, but the above log will tell us for sure.

Let us know when your AFR learning has settled in.

Here is the latest learning view. I reset the ECU Friday morning before work. Drove it there and back, then took a camping trip to Weston MO that night. Drove back yesterday night and took the learning view after some spirited runs this morning.

I am going to try and get the new LC-1 working this afternoon, once it is I'll post some logs.

Thanks for all the advice and help.

This was your AFR learning BEFORE turbo install.



I think you still have a small leak near the front O2 sensor.