DIY PROMDo It Yourself PROM chip burning help. No PROM begging. No PROMs for sale. No commercial exchange. Not a referral service.
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Wow, I'm honestly going on about 6 hours of reading straight. If anyone could set me in the right direction I'd much appreciate it.
The engine is a H/C/I MAF L98 (Stock bottom end). AFR 195 62cc Eliminators. 224/230 cam @110lsa. HSR intake.
1) You can't use the $32B mask with the ARAP bin can you? If I load $32B and ARAP bin, certain tables aren't correct. For example, the MAF table #1,#2,...etc Have zeros in every other row...? If I load $6E, and ARAP, it is all correct in the MAF tables.
2) $32B has an "Injector flow rate", which I cannot find when in $6E? So where do I put in my injector size?
3) If I want to adjust a rich condition, I find the airflow(gm/sec) it is rich at, find it in one of the MAF tables, and slightly lower that value? What if the afgs it is rich at is at 28.56. The MAF chart goes from 27.56 to 30.56 So which one would I lower?
4) The spark advance table (LV8 / RPM): LV8 = Load = The airflow(gm/sec)?
4) I have a chip from Ed wright that is light years better than the stock tune. Although it needs fine tuning (very rich). Is there a way I can save the bin off that chip and build off of it? I doubt he'll send me the bin. Would his bin work in $6E?
Sorry for being a pain in the rear...
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__________________ 1988 IROC-Z 14.0@98mph 2.07 60 Ft (Stock setup)
L98 now with a little AFR, and a bit of comp cam. - [The new "slightly" faster L98]
Last edited by IROCThe5.7L; 08-05-2009 at 06:31 AM.
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1) Correct, the $32, $32B, $6E, $8D et al defines the layout of the calibration tables. Known as the maskid the ECU/XDF/TDF file needs to match the mask.
2) $6E has an injector flow constant. Just need to find it in the definition file (ECU/XDF/TDF).
3) Basically correct, a lower MAF table value the less fuel delivered (smaller injector PW). The reason I say basically is that the AFR may be too rich if in open loop and the commanded AFR is too low.
If in closed loop and the BLM is less then 128, then the MAF table should probably be adjusted.
For more info on how the MAF tables & scalars work see the Tuning Guide Book Stick, Chap 5, '165 section. The thread MAF Miscellanea covers a lot (among other threads in that section).
4) Covered in the MAF Miscellanea thread.
5) We always recommend starting with a stock GM BIN. This way you can be sure that there isn't anything funny done to it. However, you can look at the various tables in the other BIN, you may find that items such as TCC lockup and the SA tables have been changed for the better.
To do this will need to check the BIN to see which mask was used. Then use that ECU/XDF/TDF to view it.
With a PROM burner should be able to read the BIN from the PROM.
2) $32B has an "Injector flow rate", which I cannot find when in $6E? So where do I put in my injector size?
There's a ton more reading to do. It just takes time.
It sounds to me like you're using $6E code.
The ARAP hack is a good reference for that code.
Look for the file "ARAP_hac.src" and open it up in notepad.
Go down to line# LC3D5 where the Open-Loop fuel tables & parameters start.
You should see what you're looking for. Keep in mind that several constants like these are double byte values, so:
$03D7 and $03D8 hold the injector flow constant for double-fire
$03D9 and $03DA hold the injector flow constant for single-fire
The conversions are there.
If you're using TunerPro, then you can add calibration items as needed. You just have to define them and use the proper conversion formulas.
I recommend tracing each calibration you use down in the algorithm section of the hac to make sure what it's actually doing, and which RAM variables the calibration data is referenced against, so you'll know if your conversion formula is correct. It helps to know assembly language, but you should be able to make progress using just using a copy of the Motorola assembly instruction set as a reference for reading the hac.
2) $6E has an injector flow constant. Just need to find it in the definition file (ECU/XDF/TDF).
This is all I can find when searching items for the word "injector". It says Injector pulse width vs battery voltage.
I did open the $32B, right clicked on Injector flow rate, clicked "edit item xdf info". Copied all the data in there. Opened $6E back up, added a new XDF Item, and put all the data in there and it seemed to work? Now in $6E under constants, I have a injector flow rate (single fire), and when I click it, it shows a 21lb injector. Did it actually work? lol
Quote:
Originally Posted by RBob
3) Basically correct, a lower MAF table value the less fuel delivered (smaller injector PW). The reason I say basically is that the AFR may be too rich if in open loop and the commanded AFR is too low.
I have times where the BLM drops to 108. When I am tuning for this, am I looking at the short term or long term counts at this afgs/sec? I'm still confused if I have a afgs/sec that I need to change and it's in between two numbers in the MAF table which one to adjust.
Quote:
Originally Posted by RBob
5) We always recommend starting with a stock GM BIN. This way you can be sure that there isn't anything funny done to it. However, you can look at the various tables in the other BIN, you may find that items such as TCC lockup and the SA tables have been changed for the better.
I cannot find ABYA anywhere. I also have no CSI anymore. So I'd imagine I should start with a 89 prom.
I'm going to read that thread you posted tonight. Thanks again.
305sbc, I searched TGO and google and could not find a download file for that hack.
Last edited by IROCThe5.7L; 08-05-2009 at 10:02 PM.
Ahh how did I miss that! Thank you. Stupid question, what exactly does the @40psig mean? Is that the fuel pressure? My injectors are 32lbs@43.5 Psi, Or 30lbs@39PSI. Right now my FP is at 43.5.
I did open the $32B, right clicked on Injector flow rate, clicked "edit item xdf info". Copied all the data in there. Opened $6E back up, added a new XDF Item, and put all the data in there and it seemed to work? Now in $6E under constants, I have a injector flow rate (single fire), and when I click it, it shows a 21lb injector. Did it actually work? lol
305sbc, I searched TGO and google and could not find a download file for that hack.
Why are you trying to take info from $32b if you're running $6E ?
That is confusing.
You should probably use the bin you already have. Read it off of the chip and take a look at it to verify which mask it is. That information will be one of the first few calibration items (going by memory location).
In $32 code the double fire injector constant is in bytes $03CF & $03D0
In $32b the double fire inj const is in bytes $03D6 & $03D7
This information will do you no good if you are running $6E though.
When you define a new xdf item it is critical that you put in the correct information. Don't try to copy from other xdf files unless they are for the same mask. Just put the right info & conversion formula in and it will work.
Yea, I scrapped that idea. I didn't notice the "single fire FI size". I'm ok as far as adjusting the injector size now. Thanks for the help and link, I got a lot more homework to do. Heh.
