Ls3 100 maf
Thread Starter
Melting Slicks
Joined: Mar 2018
Posts: 2,502
Likes: 187
From: California
Ls3 100 maf
So I’m looking at replacing my maf from a stock to the above title. Where I am at now currently speed density maf maybe disabled already I forget it’s been a while! I’ll find out in the file. What are the settings I would need to start get it running ? Does anyone have some sort of table for scaling I can go off ? Reason for switching the tune No one seems to know if my proflex commander works with speed density on here yet! I am awaiting a response from advanced fuel Dynamics still but I figured I would just get the process in motion if it’s unable to run in Sd Mode !
Instructor
Joined: Jan 2020
Posts: 111
Likes: 8
From: PNW
So I’m looking at replacing my maf from a stock to the above title. Where I am at now currently speed density maf maybe disabled already I forget it’s been a while! I’ll find out in the file. What are the settings I would need to start get it running ? Does anyone have some sort of table for scaling I can go off ? Reason for switching the tune No one seems to know if my proflex commander works with speed density on here yet! I am awaiting a response from advanced fuel Dynamics still but I figured I would just get the process in motion if it’s unable to run in Sd Mode !
Melting Slicks
Joined: Nov 2013
Posts: 2,049
Likes: 316
From: USA
I have the stock data from a C6 which is in a 4" / 100mm tube so that should be a good starting place.
The IAT transfer curve is also different. Attached is a file with the info you should need in hptuners format.
As far as the proflex commander, I looked at the instructions and I don't think it plugs into the MAF at all, so should not matter whether MAF or SD tune. It looks like it just reads ethanol content sensor and then intercepts the fuel injector signal
The IAT transfer curve is also different. Attached is a file with the info you should need in hptuners format.
As far as the proflex commander, I looked at the instructions and I don't think it plugs into the MAF at all, so should not matter whether MAF or SD tune. It looks like it just reads ethanol content sensor and then intercepts the fuel injector signal
Instructor
Joined: Jan 2020
Posts: 111
Likes: 8
From: PNW
I have the stock data from a C6 which is in a 4" / 100mm tube so that should be a good starting place.
The IAT transfer curve is also different. Attached is a file with the info you should need in hptuners format.
As far as the proflex commander, I looked at the instructions and I don't think it plugs into the MAF at all, so should not matter whether MAF or SD tune. It looks like it just reads ethanol content sensor and then intercepts the fuel injector signal
The IAT transfer curve is also different. Attached is a file with the info you should need in hptuners format.
As far as the proflex commander, I looked at the instructions and I don't think it plugs into the MAF at all, so should not matter whether MAF or SD tune. It looks like it just reads ethanol content sensor and then intercepts the fuel injector signal
I haven't yet calculated the diameter of the stock C6 (LS7) air intake and MAF tube, but I'm not so sure it's equivalent to 4".
I currently have a C6 air bridge/air intake on my car ('03 C5Z, LS3 engine, LS2 TB, C6 LS7 air intake). I built a round 4" intake with the MAF located exactly the same distance from the TB, but the airflow was so dramatically different that the car hardly ran. It would drive, but it was low on power and it would stall frequently.
I would think that if both tubes were 4", the car would have run roughly the same - or at least not quite as horrible. I put my C6 air intake back on, and it ran well again. I am hoping to datalog and check the differences in airflow readings next week and then I'll try again.
Melting Slicks
Joined: Nov 2013
Posts: 2,049
Likes: 316
From: USA
Either way, I started with the C6 data and just scaled the whole thing down something like 1.25 or 1.3 (in a 3.5" MAF housing) and it got me close enough to get it running and working well. Then you can fine tune from there.
Good luck!
Good luck!
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Thread Starter
Melting Slicks
Joined: Mar 2018
Posts: 2,502
Likes: 187
From: California
Thank you both for the files I have not got a chance to look yet I’m sure it will be handy !
