TC maximum pressure ratio

Civic 2016+ 1.5 Turbo
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LordMothy
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TC maximum pressure ratio

Post by LordMothy » Mon Sep 25, 2017 2:31 am

Is anyone having trouble hitting boost control targets?

I'm unable to achieve higher than 20psi under any circumstance at 3200 feet. It sure feels like I've maxed of the factory turbo.

The SI engine in factory form peaks out at 17-18psi which seems about right for this elevation. I've tried the +6,+9, and even ramped up the pressure ratio setting myself with little result. The turbo appears to quite producing after +3 psi over stock.

Does anyone have a compressor map for this TD03? I don't want to have unrealistic expectations of the SI turbo.

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Hondata
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Re: TC maximum pressure ratio

Post by Hondata » Mon Sep 25, 2017 7:57 am

If the boost pressure is significantly below the BPCMD, or the wastegate is closed, then you've reached the limit of the turbo. I'm sure new turbos will be on the aftermarket at some point.
Hondata

LordMothy
Posts: 24
Joined: Thu Sep 21, 2017 3:30 pm

Re: TC maximum pressure ratio

Post by LordMothy » Mon Sep 25, 2017 6:23 pm

I've got it sorted out. After examining the data I found that 3200-4000 feet in elevation was putting me in the .855 atmospheric range. All of the adjustments I made were based on the +6 and +9 tunes. The problem being that all of the adjustments were made to the .974 range and higher.

The good news is that I was able to test the limits of the turbo with far less error and then reduce the pressure to a reasonable limit that commands as intended. The bad news is that I'm probably still pushing the turbo around 80-85% and that it doesn't have much more to give.

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Hondata
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Re: TC maximum pressure ratio

Post by Hondata » Tue Sep 26, 2017 8:18 am

Thanks for the feedback.
Hondata

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