timmmy

Morning all,

Duplicating this over from the engine internals forum where I originally posted it by mistake. https://ls1tech.com/forums/generatio...p-3bar-sd.html

There are already some god comments in that thread, but better to have it here where it should be.

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?