Sounds close. My son has a 16g on his Spyder and I think at 26 lbs of boost it is flowing around 35 IIRC. My HX40 is flowing around 43-44 but I don't have a good tune in it yet, just for comparison but it is a new turbo for me.

1990TSIAWDTALON said:

Sounds close. My son has a 16g on his Spyder and I think at 26 lbs of boost it is flowing around 35 IIRC. My HX40 is flowing around 43-44 but I don't have a good tune in it yet, just for comparison but it is a new turbo for me.

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I know they only flow about 40 max so I wasnt sure. I also am not sure my boostest is reading quite right as my gauge says im around 17psi.. I need to get a proper map sensor installed to verify. Im also at mile high altitude which I know effects it some

I don't see his logs most of the time but we talk about each others set ups and cars so I think I am pretty close to what he is seeing on his car lately and he is burnin corn so it is just about maxed out.

Your logged airflow numbers are only as accurate as your tune.


You're saying your gauge is reading 17psi, this is your actual boost. BoostEst is ONLY an estimate of the amount of boost you're running, which is what I mean by saying your airflow numbers are only as accurate as your tune. If your BoostEst being logged is lower then the boost you're actually running (what your gauge is showing) then your airflow numbers are deflated. If your BoostEst being logged is higher then the boost you're actually running then your airflow numbers will be inflated.

The goal is to get your BoostEst and actual boost (reading from the gauge) to match @ 5.5k - 6k which will give you close to accurate airflow readings.

BTW, a quick search and you'll find that Evo III 16g's are capable of flowing ~ 42lbs/m on the right setup.

I was logging consistent 35-37lb/min with my hrc small 16g. This was only at 19.5-20psi boost

Dsmkauai said:

I was logging consistent 35-37lb/min with my hrc small 16g. This was only at 19.5-20psi boost

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I turned my boost down until i swap my injectors to 1000cc for e85. Was getting too many knock issues at wot. At 17 i can floor it and at most im getting 1.8 knock retard that comes on with auto shifting then goes away

gofer said:

Your logged airflow numbers are only as accurate as your tune.


You're saying your gauge is reading 17psi, this is your actual boost. BoostEst is ONLY an estimate of the amount of boost you're running, which is what I mean by saying your airflow numbers are only as accurate as your tune. If your BoostEst being logged is lower then the boost you're actually running (what your gauge is showing) then your airflow numbers are deflated. If your BoostEst being logged is higher then the boost you're actually running then your airflow numbers will be inflated.

The goal is to get your BoostEst and actual boost (reading from the gauge) to match @ 5.5k - 6k which will give you close to accurate airflow readings.

BTW, a quick search and you'll find that Evo III 16g's are capable of flowing ~ 42lbs/m on the right setup.

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how would you recommend adjusting this? My mafcomp is pretty spot on at this point and my elevation and displacement is correct.

To do it properly you'd have to log a MAP sensor also so you can capture boost throughout the pull. Then you'd have to play with your injector global's AND MAFComp sliders to line up both your AFREst to WB AFR's and your BoostEst to logged MAP boost pressure.

All the above is unnecessary though, I'm just trying to explain to you that don't let yourself down thinking there's something wrong with your setup looking at your logged airflow readings. Some people think their 14b setups are flowing 48lbs/m because that's what they're seeing in the log...

gofer said:

To do it properly you'd have to log a MAP sensor also so you can capture boost throughout the pull. Then you'd have to play with your injector global's AND MAFComp sliders to line up both your AFREst to WB AFR's and your BoostEst to logged MAP boost pressure.

All the above is unnecessary though, I'm just trying to explain to you that don't let yourself down thinking there's something wrong with your setup looking at your logged airflow readings. Some people think their 14b setups are flowing 48lbs/m because that's what they're seeing in the log...

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So it basically means nothing and as long as my wbfactors are good i can just leave it alone.