N54 Garrett GTW 6465(3884r) Dyno

[chrisdfv]

Threw the car on the dyno today since I hadn't done so since swapping my auto to manual transmission.

Vi engineered top mount kit with a Garrett GTW 6465 BB turbo.
E85 out of the pump. Content unverified, but it usually test at 85ish %.
100* degrees in the shop at the time of the dyno(summer in NC).
Flash only tune done by me. Boost box for control of the Mac solenoid.
20psi ramping in to 27psi up top.
10* peak timing.
I like to ramp in the power to keep the torque down for my stock rods. This is on a stock motor with 171K miles, and I have been running this power for about 29k miles now.

 

[SJ_1989]

Does the actual boost follow the target? Boost looks like it stair steps a bit. Can that be fixed by blending the load table more and/or adjusting the WGDC PID?

I was going to set up the boost to ramp in like this as well when I get the car up and running so trying to learn as much as I can beforehand.

 

[chrisdfv]

Does the actual boost follow the target? Boost looks like it stair steps a bit. Can that be fixed by blending the load table more and/or adjusting the WGDC PID?

I was going to set up the boost to ramp in like this as well when I get the car up and running so trying to learn as much as I can beforehand.

Target stays above actual. My base wgdc and after pid are what dictate my actual boost. Keeping the target slightly above avoids having any throttle closures.
I shape the boost target and actual by ramping in load.
If you search the forum I have a thread where I started my boost box tuning journey.

https://datazap.me/u/cd919/dyno-725whp-7222019?log=0&data=3-23

 

[SJ_1989]

Yea I've read through it, good stuff! Plan on referencing it as a starting point when I actually start tuning.

 

[yuli8466]

H

Threw the car on the dyno today since I hadn't done so since swapping my auto to manual transmission.

Vi engineered top mount kit with a Garrett GTW 6465 BB turbo.
E85 out of the pump. Content unverified, but it usually test at 85ish %.
100* degrees in the shop at the time of the dyno(summer in NC).
Flash only tune done by me. Boost box for control of the Mac solenoid.
20psi ramping in to 27psi up top.
10* peak timing.
I like to ramp in the power to keep the torque down for my stock rods. This is on a stock motor with 171K miles, and I have been running this power for about 29k miles now.

View attachment 29327
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View attachment 29329

Hello

manual or auto ?

how do you fueling it

thank you

 

[chrisdfv]

Hello
manual or auto ?
how do you fueling it
thank you

Manual.
Two walbro 450s in tank and port injection with E85.

 

[Torgus]

Gotta love 700whp on a stock 170k block. Nice numbers.

 

[bahn]

Threw the car on the dyno today since I hadn't done so since swapping my auto to manual transmission.

Vi engineered top mount kit with a Garrett GTW 6465 BB turbo.
E85 out of the pump. Content unverified, but it usually test at 85ish %.
100* degrees in the shop at the time of the dyno(summer in NC).
Flash only tune done by me. Boost box for control of the Mac solenoid.
20psi ramping in to 27psi up top.
10* peak timing.
I like to ramp in the power to keep the torque down for my stock rods. This is on a stock motor with 171K miles, and I have been running this power for about 29k miles now.

Pretty large delta between your STFT's on bank 1 and bank 2 btw, bank 1 is adding about 10-15% more fuel than bank 2.

1) Make sure your fuel scalar tables are identical for bank 1 and bank 2
2) You might have a leaking injector in bank 2 or a malfunctioning (read flowing less fuel) injector in bank 1.
3) Fuel scalar tables (PI tuning as well) need work for low and high load. In low/mid load sections the STFT is adding 10-23% fuel and in high loads STFT is removing 10-22% fuel.

Nice numbers but without the STFT's helping you keep close to your AFR target, you would probably be the owner of some melted pistons by now.

 

[chrisdfv]

Pretty large delta between your STFT's on bank 1 and bank 2 btw, bank 1 is adding about 10-15% more fuel than bank 2.

1) Make sure your fuel scalar tables are identical for bank 1 and bank 2
2) You might have a leaking injector in bank 2 or a malfunctioning (read flowing less fuel) injector in bank 1.
3) Fuel scalar tables (PI tuning as well) need work for low and high load. In low/mid load sections the STFT is adding 10-23% fuel and in high loads STFT is removing 10-22% fuel.

Nice numbers but without the STFT's helping you keep close to your AFR target, you would probably be the owner of some melted pistons by now.

I think one of my injector is leaky. I can hear it being a bit rough on cold starts, and my trims used to be a lot closer. It might be time to order a whole new set of 6 from FCP.