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Old 08-31-2014, 05:11 AM   #1
rasyaya
 
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Question Boost pressure values on Yaris 1.4L D4D 90

Hi everybody,
I have a 2009 Yaris with the 1NDTV turbo diesel engine (1.4L D4D 90hp).
I would like to have some information about boost pressure standard values.
A boost pressure vs rpm curve would be great, but even an info about the standard maximum boost pressure would be helpful.

P.S : the engine has a Variable Geometry Turbocharger, so no wastegate.

Thanks for your help
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Old 09-29-2014, 07:48 AM   #2
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Unhappy no one can help?

Bump

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Old 09-29-2014, 09:06 AM   #3
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Not sure anyone knows. PM CTScott, he might have an idea, or maybe an idea where you could acquire that info.
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Old 09-29-2014, 09:47 AM   #4
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I have never seen a chart, but according to the service manual the max boost at 5100-5250 RPM should be 2.2 to 6.5 psi.
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Old 10-04-2014, 05:51 PM   #5
rasyaya
 
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Thumbs up

Thanks CTScott
So that is a maximum boost up to 6.5 PSI above atmospheric pressure I suppose.
I have the service manual for the petrol Yaris 2. Where can I found/download the diesel service manual?
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Old 10-04-2014, 06:27 PM   #6
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Quote:
Originally Posted by rasyaya View Post
Thanks CTScott
So that is a maximum boost up to 6.5 PSI above atmospheric pressure I suppose.
I have the service manual for the petrol Yaris 2. Where can I found/download the diesel service manual?
Correct. I will send you what I have for the diesel.
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Old 01-16-2022, 01:21 PM   #7
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Quote:
Originally Posted by CTScott View Post
Correct. I will send you what I have for the diesel.
hello CTScott can you send me those too?
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Old 10-05-2014, 04:54 AM   #8
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Thank you very much for the link CTScott.
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Old 12-21-2014, 05:49 AM   #9
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I also enjoy a diese 90 bhp. I am planning some mods to achieve better cooling and performance but I only have the petrol manual. Can you send me the diesel one, please?
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Old 03-25-2015, 06:43 AM   #10
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1NDTV from 2009 boost peak 0.85bar and costant boost 0.7bar, to increase the boost you have to remap the ECU.
I remapped the Ecu and now I have boost peak 1.1bar and costant boost 0.9bar for 110hp ;)
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Old 05-03-2015, 06:21 AM   #11
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I have to kind of agree with Giupo, i can't remember stock boost on my 06 D4D.

But after i mounted a power box on the common rail sensor boost where about 0,9-1,1 bar.
For some time I had a power box on the MAP sensor, boost where 1,4-1,5 bar (peak boost 2 bar++) stock sensor is "blind" over 2 bar. Stock ECU reduces diesel pressure if boost is 1,5 bar.

I think stock turbo is good for about 140-150 hp max. I've mounted a bigger VNT turbo, bigger ic, portet top and bigger trottle valve, and aiming for 180 hp.
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