timmmy

Morning all,

I am wondering if some of you HP Tuners guru's who have experience with 3bar SD tuning for V8 TT applications could take a look at my base tune file and log. I am a relative noob with HP Tuners and with the LS motors so any feedback would be greatly appreciated as I learn the ropes here. I have a lot of experience with SEM edu tuning such as Vipec, VEMS etc, but HP Tuners is a little different.

Some details on the project to get started:


2003 Audi RS6, purchased without a motor.
LS1 from a 2004 GTO fitted last year, retaining Audi AWD via an adapter plate and custom FW and clutch, race prepared 01E 6spd AWD transmission etc.

I ran the car NA on a 1bar SD tune last year, but lost a fuel pump while on track and cooked the motor Since then the motor has been built and a lot of things changed, the following is the latest info.

LS1 stroked to 383 with a SCAT crank and rods, forged custom pistons with 9:1 CR
AFR Mongoose 230 heads
Custom ground cam for high rev / high boost, I can provide specs if needed. Compcams 1.75 roller rockers etc
LS6 intake, flipped with 102m electronic throttle (GM)
custom headers feeding a single 4" exhaust to the rear subframe
Dual rear mount 3076 turbos .56 intake .60 exhaust, rear mount intercooler with 3" feed back to the motor. Manual boost controllers only
(I have a blade style Hitachi MAF in the boost tube close to the throttle body, along with an internal and external IAT sensor)
Injector Dynamics 1000cc injectors (HP tuners updated for these per their instructions)


Target once broken in is 20psi of boost, breaking in will be 5lb.

Here is a link to the build thread on Motorgeek: http://www.motorgeek.com/viewtopic.p...901&start=1150

PIcture gallery:

1) https://plus.google.com/photos/11767...521?banner=pwa

2) https://plus.google.com/photos/11767...105?banner=pwa

Youtube channel (personal) http://www.youtube.com/user/timmmy
Youtube channel (business) http://www.youtube.com/user/HTMotorsport

Last dyno session (with the 1 bar SD tune in place, just to get things checked out. had some issues which are now resolved)


I took the 1 bar SD tune from last year, changed a bunch of stuff and converted to 3bar, then changed a bunch more stuff. The car now fires up, idles, runs and drives pretty well. The next step is to get on the dyno with my tuner (Alex from granite state dyno in NH www.dynonh.com) Before I get there I would like to get as close as possible so Alex can focus on fine tuning as opposed to setting up the basics.


Attached are my latest HPT file and a startup log from yesterday.

Thanks for any input.

Haydn
www.motorsport-HT.com

As a mini update, I just took 'Judas' round the block for a quick test and came up on a new issue. For the first time I gave it the beans and when I built boost above 5psi, the car died. it would crank but not start until I cleared DTC's. Unfortunately I did not write the DTC's down, but from memory they were:

Engine RPM output issue (seen this a few times now)
MAF-zeor (OK)
2 others I dont remember.

I logged the drive and have attached the log here. In my quick review I see boost hit 116K/pa (16psi) and right at that point I see some burst knock retard.

Once I clear the DTC's it fires right up and is happy again.

Any thoughts?

ckpitt55

iTrader: (4)

just came in to say that your car is absolutely ridiculous. nice fab / tig work

bump for someone else who might have some insight to your tuning issue....did you try the tuning subforum?

ryridesmotox

Holy hell dude. Go big or go home I guess. Looks good. Have you tried the HP tuning forums? If you go on the HPT website you can find the link there for their forums. Many guys over there have a TON of experience. Good luck finishing up the tuning/build. I'm not going to comment on the tune because I am also a noob tuning the LS blocks

00transamws6

iTrader: (4)

Wow what an unique build. Turned out awesome, should be amazing once you get everything figured out.

DMM

Awesome build! A few things stand out...you cannot use the MAF and have 3 BAR functionality. You have to disable the MAF, zero the MAF calibration, and set all the MAF DTC's to: 1) MIL First Error (but uncheck the SES enable).

Your VE maps look low for a turbo 383. I would suggest using the Lambda Error method since it's really quick and easy to get things dialed in, +/- values show up as a multiplier in the histogram that you multiply the existing VE table values by. You need to have your wideband set to lambda and set in the VCM scanner to do this though. You can tune yourself a solid 85% of the way on the street to get excellent drivability.

Your timing is way high for a 3 BAR setup, make sure you drop it down to about 12*-16*.

I would ask a MOD to move this over to the PCM/Tuning section and you will probably get more responses.

timmmy

Thanks for the praise and the bump

timmmy

Thanks

I have it posted over on HP Tuners too, but I figured I would share/ask here too as you lot are awesome.

I like to go big

timmmy

Thankyou

I am a Euro fanboy at heart, but always loved the big american V8's too, this project seemed like an Ideal opportunity to have the best of both worlds.

timmmy

great feedback, thankyou for taking the time to look at my files, much appreciated.

Comments below;


Thanks, I believe (bear in mind I am uber new to this so I might be wrong) I have the MAF zero'd out so the PCM is ignoring it and dropping into SD. I have the MAF still in there so I can see the #'s and use them for feedback. So my furst question I guess is "Am I really dropping into SD, or are my settings such that the PCM is still using the MAF?"

Yeah, I took the 1 bar SD tune from the stock motor and followed the HP Tuners tutorial on changing it to 3bar. The car would not even start so I chatted with HP Tuners tech support and they checked the file but didn't find anything untoward but the car still wouldn't run. I was watching my PLX wideband while cranking and the AFR was up at 20, so I took a wild guess and just doubled the VE table, hey presto it fired up and ran fairly well. That is what I have in there right now.

I am away on vacation right now and am hoping to spend some time messing with the tune file so I can get it closer when I get back next weekend.

when I get home I will hook the PLX wideband into the HP Tuners box so I can log the data and work on what you suggest. I have never done the Histogram tracking thing so I wil have to learn how to do that. do you know of any good threads or tutorials I can review to learn the process?


Same comments from my end as the VE stuff. This is all from the stock 1bar tune so far. I did notice the timing was uber high.

Does anyone have an HPT file of a similar setup I could use to do a compare in HP Tuners to get a little clsoer to where I should be?


I sent a message in to get it moved, good call thankyou.

feedtheboost

sick set-up I was going to do a similar set-up on my b6 S4, but I think I'm throwing in a 4g63 mated to a th400 (might do an lq9/4l80e) and have it rwd. it would be hell to make an adapter plate, flexplate, and THEN get the ecu to shift the tiptronic properly. That way I can also sit the trans back much further to give room for the accessories

Tainted

iTrader: (9)

That ls6 intake seriously holds you back an easy 20hp. Get a fast 102

timmmy

It's on the list once I get this setup dialed in properly.

Tainted

iTrader: (9)

good, sick build BTW.

If you don't mind me asking, what was the cost of the custom flywheel and adapter to make the AWD unit work?

Detoxx03

iTrader: (14)

Now that is the definition of a unique build. Can't wait to see what it does broken in.

timmmy

I am an Industrial Designer/Mechanical Engineer so I did all the Design and 3D CAD myself. The FW was machiend by 034 Motorsport and cost just over $500. The clutch is a Clutchmasters 850FX twin disc and was right around $700. the Adapter plate was a prototype unit that I adapted to suit and was $900.

Having said all that I just bought a 3D CNC Bridgeport and have all the CAD files so the next time I do this it will be a lot cheaper.

gagliano7

Post it in the pcm section here you will probably get more help.

timmmy

requested to have it moved over to the PCM section. Thx