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Stock Truck Map Sensor for Boost Tuning (SD Tune)

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Old 03-11-2013, 10:02 AM
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In theory, the stock MAP sensor will not be able to detect any changes in pressure above ambient. Scaling an output that isn't changing won't be of any use.

Originally Posted by Boober
Have fun with your SD tune using the IAT in your MAF. I would be looking for a new tuner if someone told me they could "scale" a stock 1 bar for boosted SD while using a stock IAT.
What's wrong with the IAT that's in the MAF sensor?
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Old 03-11-2013, 10:39 AM
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Originally Posted by Atomic
Sure, if he scaled it.

I maxed out a stock maf on 10psi with a 5.3...I didnt want to bother with scaling so I just went straight 2bar sd on that setup and its been great. If everything is tuned properly you will not notice a difference in table resolution between the 2 and 3 bar. Hell I ran NA for a while on a 3bar sensor. The lower resolution is not that big of a deal.
Ok. That makes sense to me. I hope everyone posting and trying to be smart *** reads this first. Thanks.
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Old 03-11-2013, 11:26 AM
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I wouldn't want to use the Iat in the maf bc the maf is just another obstacle in the intake path. Its too easy to just get a iat sensor and set it up
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Old 03-11-2013, 04:59 PM
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Originally Posted by o2camaross
You can get the threaded IAT from autozone, the number is SU107. But I would also buy the bung. You can actually get the bung, iat sensor, and pigtail all from RPS. Just cut the two IAT wires out of your maf harness and solder the new pigtail to it.
I found this IAT on ebay that comes with bung and connector plug.

Aem Air Inlet Intake Temperature Temp Sensor Kit AIT | eBay
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Old 03-11-2013, 07:16 PM
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That should work just fine!
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Old 03-12-2013, 10:51 AM
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There is one individual running the factory 1bar MAP and factory MAF pushing 25psi?.. but everybody knows pixie dust is sprinkled on them daily..
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Old 03-12-2013, 11:52 AM
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Originally Posted by nonnieselman
There is one individual running the factory 1bar MAP and factory MAF pushing 25psi?.. but everybody knows pixie dust is sprinkled on them daily..
This is true but he is spraying 3 meth nozzles and using e85 or race gas for safety. Jarrett is also doing his own tuning so he can make adjustments on the fly. I guess the pixie dust is magic that won't work with a 2 bar sensor.
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Old 03-12-2013, 01:18 PM
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3 bar it and be done,you'll want it in the future if you want to go with more boost. i can't see it taking him 4 hrs to setup the tune for that at all.
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Old 03-12-2013, 02:29 PM
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scaled tune on maf can do it. not sd though. you're being fed a line of ****.
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Old 03-12-2013, 03:59 PM
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Originally Posted by TimDave217
3 bar it and be done,you'll want it in the future if you want to go with more boost. i can't see it taking him 4 hrs to setup the tune for that at all.
I am going with SD tune using 3-bar GM old style map or 3.3-bar Dmax LS style map sensor.

Can any recommend one over the other from the point of better tuning and idle characteristic. I mean GM 3-bar vs GM Dmax 3.3 bar map sensors.
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