stee3 Member 194 Member For: 13y 8m 15d Posted 12/05/12 12:10 AM Share Posted 12/05/12 12:10 AM Hey all I'm about to start tuning my car, I have a tough engine that I built and want to put around 30-35PSI of boost into it. I have been told the factory MAP sensor can only read up to 28PSI so I'm wondering what MAP sensor the guys with over 30PSI are using? I'm assuming the factory MAP sensor is a 2 bar unit so I'd like to get 4 bar sensor.. Any help would be appreciated. Link to comment Share on other sites More sharing options...
IH8TOADS Silver Donating Members 3,618 Member For: 19y 8m 5d Gender: Male Location: OZ Posted 12/05/12 05:53 AM Share Posted 12/05/12 05:53 AM http://www.bosch.com.au/content/language1/downloads/Map_Sensor_Technical_Specification.pdfStandard fitment 3.5 and 4 bar sensors in the PDF.How do you plan on rescaling the t-MAP calibration in the PCM?You'll be lucky to get over 23psi from the stock sensor....BAP dependent. Link to comment Share on other sites More sharing options...
stee3 Member 194 Member For: 13y 8m 15d Posted 12/05/12 11:10 AM Author Share Posted 12/05/12 11:10 AM I havnt scaled one before but I'll data log the one that's on there at the moment. I'll have to see what the voltage and signal are doing and go from there, I'm sure I'll figure it out but if you have any information that would be great too.. Link to comment Share on other sites More sharing options...
riptide Member 733 Member For: 14y 1m 23d Gender: Male Location: Auckland, New Zealand Posted 12/05/12 11:45 PM Share Posted 12/05/12 11:45 PM Looks like a pretty tough engine alright, going by your sig.Why don't you run an electronic boost controller? Just wondering 'cause it sounds like you know your stuff Link to comment Share on other sites More sharing options...
stee3 Member 194 Member For: 13y 8m 15d Posted 13/05/12 01:24 AM Author Share Posted 13/05/12 01:24 AM Im going to use the factory boost controller should do the trick but if it doesn't its easy enough fit an eboost. Link to comment Share on other sites More sharing options...
IH8TOADS Silver Donating Members 3,618 Member For: 19y 8m 5d Gender: Male Location: OZ Posted 13/05/12 02:39 AM Share Posted 13/05/12 02:39 AM The t-MAP sensor is used in the air flow estimation. There is a seperate MAP sensor before the TB that's used for the factory closed loop boost control.......SO given you can tune boost off the ducy cycle table only, the pegged MAP seanor isnt an issue and an eBoost won't help with the issue of unmetered fuel. If you look at the sensor calibrations they are very different so you're going to have to fool the PCM given that you cant directly rescale the sensor volt vs MAP itself. You should really go through the entire PCM and recalibrate everything that is load based.....anytime you touch speed density you have to recalibrate anything load related...and that takes ages. Link to comment Share on other sites More sharing options...
stee3 Member 194 Member For: 13y 8m 15d Posted 13/05/12 03:09 AM Author Share Posted 13/05/12 03:09 AM I'll tune it entirely in open loop (duty cycle only) especlally boost control and and where ever else I can. I'll have a read through the Advantage manual in the next day or so and I'll figure out how to scale the MAP sensor. Link to comment Share on other sites More sharing options...
IH8TOADS Silver Donating Members 3,618 Member For: 19y 8m 5d Gender: Male Location: OZ Posted 13/05/12 04:18 AM Share Posted 13/05/12 04:18 AM You can't scale the t-MAP via AdvantageIII. Link to comment Share on other sites More sharing options...
JETFPV Donating Members 672 Member For: 17y 4m 7d Gender: Male Posted 16/05/12 01:57 PM Share Posted 16/05/12 01:57 PM I beleive you would probably be looking for this...http://www.bosch.com.au/content/language1/downloads/Map_Sensor_Purpose_and_Function.pdfPart No : 0 282 002 576 Link to comment Share on other sites More sharing options...
XYZ Donating Members 1,171 Member For: 15y 5m 23d Posted 12/06/12 08:53 AM Share Posted 12/06/12 08:53 AM Maybe a little off topic, however are the standard MAP sensors known to fault? Link to comment Share on other sites More sharing options...
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