I'm trying to understand the relationship between these tables. A.i. is no help. I'm currently flowing 416g-sec over my MAF or 55lbs whichever way you look at it. If I wanted more flow/boost would I increase both? Or decrease both? OR increase and decrease each one alternatively? 1% increments of course.
Thanks.
Compressor/wastegate tables?
Re: Compressor/wastegate tables?
our compressor efficiency map is pretty much useless at those flow rates, since we are unable to edit the index and the max value of the index is something like 280g/s IIRC. It only impacts a small portion of the actual efficiency map for even a G25-660.
which turbocharger are you running?
which turbocharger are you running?
Re: Compressor/wastegate tables?
MhiFAKE2 by tianjin craft turbos, MHI stage2 copy.
Re: Compressor/wastegate tables?
First, let me correct my earlier post. I went back and looked at my notes after making the post.
The X-axis on our ECU's compressor maps is expressed in volumetric terms (decimeters^3/s), not mass-based as I had incorrectly remembered, so the 280 is not g/s it's 280 decimeters^3/sec. The compressor map that you can find online for the MHI Stage 2 also uses volumetric terms but a scaled unit (meters^3/second), which is convenient (most of the other maps I've found for other turbochargers are mass based). The ratio of dm^3 to m^3 is 100:1, so just multiply the values on the X-axis of that MHI Stage 2 compressor map and overlay with what's available on the compressor map in flashpro manager. As it is, the compressor map's maximum index on the x-axis is 280decimeters^3/second. As you can see in the link above, the compressor map for the MHI Stage 2 extends to 350decimeters^3/second, so everything in that map from 280-350dm^3/second is truncated as it currently sits with FlashPro Manager.
the conversion from decimeters^3/second to grams/second is 1.225 grams/dm^3 at "standard conditions". So the compressor map values that we can *currently* edit basically ends at 367 g/sec and as you stated you're in the 415-420g/s range already. Using this 1.225 factor, the MHI compressor map extends out to almost 430g/s of flow and a G25-660 is at 450g/s (~370dm^3/s).
Note that it's not just the flow side that's truncated on the FlashPro's compressor efficiency table. On the Y-axis (Pressure Ratio), the max value of the index is 3.25. In the case of the MHI and G25-660 turbos the efficiency map extends to a pressure ratio of at least 3.8 on both. So all of those values you can see on the compressor map that are greater than 3.25 pressure ratio and 0.28m^3/s, those cannot be entered into FlashPro Manager as it is.
I have actually requested previously that Hondata allow the editing of the indices for this table since it is clipped on both axes and I hope it is possible for them to open this up.
The X-axis on our ECU's compressor maps is expressed in volumetric terms (decimeters^3/s), not mass-based as I had incorrectly remembered, so the 280 is not g/s it's 280 decimeters^3/sec. The compressor map that you can find online for the MHI Stage 2 also uses volumetric terms but a scaled unit (meters^3/second), which is convenient (most of the other maps I've found for other turbochargers are mass based). The ratio of dm^3 to m^3 is 100:1, so just multiply the values on the X-axis of that MHI Stage 2 compressor map and overlay with what's available on the compressor map in flashpro manager. As it is, the compressor map's maximum index on the x-axis is 280decimeters^3/second. As you can see in the link above, the compressor map for the MHI Stage 2 extends to 350decimeters^3/second, so everything in that map from 280-350dm^3/second is truncated as it currently sits with FlashPro Manager.
the conversion from decimeters^3/second to grams/second is 1.225 grams/dm^3 at "standard conditions". So the compressor map values that we can *currently* edit basically ends at 367 g/sec and as you stated you're in the 415-420g/s range already. Using this 1.225 factor, the MHI compressor map extends out to almost 430g/s of flow and a G25-660 is at 450g/s (~370dm^3/s).
Note that it's not just the flow side that's truncated on the FlashPro's compressor efficiency table. On the Y-axis (Pressure Ratio), the max value of the index is 3.25. In the case of the MHI and G25-660 turbos the efficiency map extends to a pressure ratio of at least 3.8 on both. So all of those values you can see on the compressor map that are greater than 3.25 pressure ratio and 0.28m^3/s, those cannot be entered into FlashPro Manager as it is.
I have actually requested previously that Hondata allow the editing of the indices for this table since it is clipped on both axes and I hope it is possible for them to open this up.