Are you still running all that torque down low? Awesome performance on stock turbos, and great to see the stock rods durability!
Calum's Stock Turbos N54 Drag Build
- Thread starter Cal1415
- Start date
I have turned the boost down slightly between 2000-3000 and increased the boost more in the midrange. It has been extremely reliable thus far. When I launch the boost in 1st gear is limited to 16psi which also helps to protect the engine.
Last 1/4 mile event of the year and unfortunately couldn’t improve on my ET. However my 100-200km/h did improve to a 7.29 which I’m happy with.
Although these stock turbos are making some power, they’re smoking really badly now so I’m looking at potential upgrades.
Dyno Results: 467 WHP 569 WTQ
Stock Turbos at 23psi with 102k miles
Automatic transmission
I’m very happy to have gained 27 WHP since last year on the same dyno. I have increased the boost slightly since last year and I’m now mixing NF octane booster with the E50 mix.
New O2 sensors
Fresh Motul X-cess 5w-40 oil
New rear brake pads (the old ones were sticking)
Simple changes but a nice increase in power.
Stock Turbos at 23psi with 102k miles
Automatic transmission
I’m very happy to have gained 27 WHP since last year on the same dyno. I have increased the boost slightly since last year and I’m now mixing NF octane booster with the E50 mix.
New O2 sensors
Fresh Motul X-cess 5w-40 oil
New rear brake pads (the old ones were sticking)
Simple changes but a nice increase in power.
10Ts putting in work!
It is still amazing me to the amount of power you can wrench out of this 3.0 with two 10t turbos.
It is still amazing me to the amount of power you can wrench out of this 3.0 with two 10t turbos.
So what changes were made ? Increased whp but lost peak torque. Do you feel any difference ?
I have turned the boost down slightly between 2000-3000 and increased the boost more in the midrange up to 23psi compared with 22psi last year. I wanted less torque down low to help protect the engine and transmission.
The only other changes are:
NF octane booster
Motul oil (was using Castrol last year)
New valve cover and upgraded PCV valve
I went back to stock Bosch plugs
S55 Eldor coils
New BMS DCI (the old ones were dirty)
Maybe increase duty bias a bit ? You target 23 psi but hit more like 22. So you are kinda in the same boat as last year. Unless last year logs show you target 22 and actually only hit 21 ? Then you would see a gain still. Either way, I would fine tune duty bias a bit.
Do you have logs from previous dyno ? Curious to see the reason why an increase of 25+whp on 1 more psi that actually does not even meet target. Still at 22.
Also I see ASBR at 85. Were you getting overboost spikes on shift ?
Good job though, nice results
The target boost is now 1psi higher compared to last year so 467whp at 22psi is nice to see. I do hit 23psi on the road and 1/4 mile track in 4th gear.Maybe increase duty bias a bit ? You target 23 psi but hit more like 22. So you are kinda in the same boat as last year. Unless last year logs show you target 22 and actually only hit 21 ? Then you would see a gain still. Either way, I would fine tune duty bias a bit.
Do you have logs from previous dyno ? Curious to see the reason why an increase of 25+whp on 1 more psi that actually does not even meet target. Still at 22.
Also I see ASBR at 85. Were you getting overboost spikes on shift ?
Good job though, nice results
I have no logs from the previous dyno but the timing is now the best I’ve ever seen it with no corrections. Also the lower IAT have helped with the power increase.
Yes I do get overboost spikes on shifts.
Thanks, I could probably target 24psi and hit 23 on the dyno but I’m happy where it’s at.
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