Leave wastegate open for first tune?
#1
Leave wastegate open for first tune?
Hi,
I am mid-swap from a 1.6 to a 1.8 VVT engine and I have the turbo set-up fairly complete. Now I can either:
- Leave all turbo stuff off for the first couple of weeks, to get the base tune on my ECU right, and then convert to turbo.
- Put all the turbo stuff on and go for (low) boost immediately.
- Middle ground; ty the waste gate in it's open position, so I can drive around almost naturally asperated for the first few weeks to get a base tune, and then hook up the wate gate and the boost solenoid when I feel comfortable doing so.
The third option sounds tempting as it means I don't have to convert later, but is harmfull for a turbo (or the engine, for that matter), to run with the waste gate fully open? Is there something else I should know and that stops me from option three?
Thanks,
Hugo
I am mid-swap from a 1.6 to a 1.8 VVT engine and I have the turbo set-up fairly complete. Now I can either:
- Leave all turbo stuff off for the first couple of weeks, to get the base tune on my ECU right, and then convert to turbo.
- Put all the turbo stuff on and go for (low) boost immediately.
- Middle ground; ty the waste gate in it's open position, so I can drive around almost naturally asperated for the first few weeks to get a base tune, and then hook up the wate gate and the boost solenoid when I feel comfortable doing so.
The third option sounds tempting as it means I don't have to convert later, but is harmfull for a turbo (or the engine, for that matter), to run with the waste gate fully open? Is there something else I should know and that stops me from option three?
Thanks,
Hugo
#2
Retired Mech Design Engr
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Wired open is fine.
Set your Overboost Cut to about 110kPa as a safety.
Then, as you move up, tune one row at a time, increasing the Overboost as you go, while never letting it be above rod-bending torque.
That having been said... the more you do at once: Engine, ECU, Injectors, etc, the more likely you have of experiencing a problem you don't know how to fix.
Best would have been to install the aftermarket ECU with the original engine. Then, if you got a NO-START situation, you could put the stock ECU back in while you troubleshoot.
What ECU do you have?
Set your Overboost Cut to about 110kPa as a safety.
Then, as you move up, tune one row at a time, increasing the Overboost as you go, while never letting it be above rod-bending torque.
That having been said... the more you do at once: Engine, ECU, Injectors, etc, the more likely you have of experiencing a problem you don't know how to fix.
Best would have been to install the aftermarket ECU with the original engine. Then, if you got a NO-START situation, you could put the stock ECU back in while you troubleshoot.
What ECU do you have?
#4
Thanks. I have a Speeduino 0.4.3 board with a diy break-out to the VVT ECU connector. I don't have the original ECU of this engine. And the original ECU of the 1.6 is completely different, wiring wise and performance wise. I have rmoved the 1.6 today (it is suspended in the crane as I need to loosen the wiring to the PPF now that I have access) and then it leaves for good. Then the 1.8 VVT will go in and I'll start the wiring mess. So if it doesn't work, I will have a hard time trouble shooting, that is for sure. Hence I would like to keep the boost out of the equasion to start.
Good point, on the GT2554R the wastegate opens outwards, nothing hits. But a good thing to check, certainly.
Cheers,
Hugo
Good point, on the GT2554R the wastegate opens outwards, nothing hits. But a good thing to check, certainly.
Cheers,
Hugo
#6
Thanks. I have a Speeduino 0.4.3 board with a diy break-out to the VVT ECU connector. I don't have the original ECU of this engine. And the original ECU of the 1.6 is completely different, wiring wise and performance wise. I have rmoved the 1.6 today (it is suspended in the crane as I need to loosen the wiring to the PPF now that I have access) and then it leaves for good. Then the 1.8 VVT will go in and I'll start the wiring mess. So if it doesn't work, I will have a hard time trouble shooting, that is for sure. Hence I would like to keep the boost out of the equasion to start.
Good point, on the GT2554R the wastegate opens outwards, nothing hits. But a good thing to check, certainly.
Cheers,
Hugo
Good point, on the GT2554R the wastegate opens outwards, nothing hits. But a good thing to check, certainly.
Cheers,
Hugo
If you need any help with troubleshooting just send me a PM, I live in Zuid-Holland. Although visiting is a bit harder with the Covid situation.
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