Hoss -05's build thread
#926
Former Sponsor
The problem with starting with a high pressure spring is you cannot accurately tune the boost curve on the way to your target boost level.
In other words when a customer brings a car to the shop and says "I want it tuned at 15 psi" sure, no problem. The issue is the turbo doesn't spool from 0 instantly to 15psi so every time your on the way to the 15psi target the boost builds through 1,2,3,4,5,6,7,8,9,10,11,12,13,14 then to 15psi.
There very well may be lean (or rich) spots along the way at 6 or 8psi for instance and it runs through that part of the window every time to the target boost. Kind of death by a thousand cuts if you will. Personally, I have always found the best results (read engine life) is to start off low, make a pull and analyze the log. Review and verify the results are the desired results then turn on the boost controller and begin slowly turning it up and repeating the process. It does take longer but makes for a much more solid tune in the long run.
"To get that back again in a more controlled fashion you need to adjust the "start boost" setting . This is the setting that keeps the WG shut right up until just before you hit target boost."
Exactly, just use caution and not set it too close to the target or it will overboost 1-2 psi momentarily and then drop back to the desired target. This also can change with ambient temperature flucuations so tuning just above where you will normally run adds a safety buffer.
I hope this helps, Scott
Last edited by RX-Tuner; 03-11-2016 at 11:54 AM.
#927
I took your guys advice to heart. I pulled the wastegate to switch out for a lower spring rate, different port setup and different valve seat.
For ***** and giggles I thought i would check the function and found the gate to not be working properly and it had a few other issues. Luckily I have a bunch of extra wastegate parts laying around due to some issues with shipping and poor quality of brass nipples (don't ask not sexual).
When i switched springs i also changed to the recommended port for external boost control (6.3psi with the small spring). This wastegate is really very different than most. It has changeable valve seats used for flow control, the large being 46mm the small being 36mm. I figured with the smaller spring i would want the smaller valve seat to promote quick spool up. I also added a hair of preload to the gate control valve. I will reset the start boost function at 5.5psi and adjust my limits on the boost cut. I fully expect to be almost pig rich everywhere but light boost now. Will see how the logs look.
I'll get it bolted back up tomorrow and take her for a spin in the evening. 9krpmrx8 may be coming over so we will get video if that happens.
For ***** and giggles I thought i would check the function and found the gate to not be working properly and it had a few other issues. Luckily I have a bunch of extra wastegate parts laying around due to some issues with shipping and poor quality of brass nipples (don't ask not sexual).
When i switched springs i also changed to the recommended port for external boost control (6.3psi with the small spring). This wastegate is really very different than most. It has changeable valve seats used for flow control, the large being 46mm the small being 36mm. I figured with the smaller spring i would want the smaller valve seat to promote quick spool up. I also added a hair of preload to the gate control valve. I will reset the start boost function at 5.5psi and adjust my limits on the boost cut. I fully expect to be almost pig rich everywhere but light boost now. Will see how the logs look.
I'll get it bolted back up tomorrow and take her for a spin in the evening. 9krpmrx8 may be coming over so we will get video if that happens.
#930
SARX Legend
iTrader: (46)
![TX](https://www.rx8club.com/images/icons/tx.jpg)
Hoss just had a baby boy and is working out of town right now so his life is a bit hectic at the moment so we haven't been able to do much we . His Bridgeport was DOA thanks to dipshit scumbag Brian D. Cain and He never got any money back so he is running a standard Mazda reman right now.
Last edited by 9krpmrx8; 06-12-2016 at 06:45 PM.
#931
Boosted Kiwi
iTrader: (2)
Hoss just had a baby boy and is working out of town right now so his life is a bit hectic at the moment so we haven't been able to do much we . His Bridgeport was DOA thanks to dipshit scumbag Brian D. Cain and He never got any money back so he is running a standard Mazda reman right now.
Do you know if it was just the secondaries that were bridged ?
Last edited by Brettus; 06-17-2016 at 12:44 AM.
#932
yes, just the secondaries
#933
It was bridged in an odd way incorporating both the housings and Irons. Also i'm excited to try this. Release Notice: Eugene 1.1.3
#934
I think that's the normal way to bridge. You notch the housing in order to increase and smooth airflow
I downloaded Eugene to see how adaptronic worked. I'm amazed. The built in safety features are awesome as well. I can't wait to get my build underway.
I downloaded Eugene to see how adaptronic worked. I'm amazed. The built in safety features are awesome as well. I can't wait to get my build underway.
#938
^I think the kid/rest of life have taken over. This project is on the back burner
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