87 Vette Owner

I am in the process of adjusting a $6E bin (APYP) for my '87 vette using TunerPro. Coming from a $32B mask, there are a few parameters listed in TunerPro for $6E that I am not entirely sure of their function or if changes need to be made. I tried using the regular search and advanced search for "$6E", "checksum", etc. but kept getting a "sorry, no matches" message. I am sure this has been discussed at length here, but hopefully someone can help . 1. For the "Mask ID (Set to AA to disable Checksum)" - should I set to "AA" or leave at "6E"? What does disabling the checksum do? 2. What is the "ALDL Spark Adder" parameter? 3. What is the "Trans TPS filter coef."? 4. Should I leave the "Calc BPW (Don't Use Table)" flag checked? 5. What is the "Spark Correction - LV8 vs. Coolant Temp" table for? 6. Is there any other basic information (regarding going from $32B to $6E) I should know? Changes that need to be made? I've read about the scaler tables and disabling the EGR in the stickies above, so I have an understanding there. Many of the other parameters seem to be fairly intuitive. There is a lot more to work with in $6E, which is a little overwhelming for a novice like myself coming from $32B, but I can already see the benefits of being able to work with these additional parameters. Thanks very much for your help! Dan

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Mangus

Hello -

1) Set it to AA and forget it.
2) Set the ALDL spark adder to 0. If set to anything else, when the 10k resistor is in place to connect to the ALDL data stream, that number of degrees is added to the spark output. This is generally undesireable, so setting it to zero means your spark output isn't touched during ALDL monitoring/logging.
3) I'm not sure (I drive a manual)
4) Yes. $6E doesn't actually have a table, so this flag isn't very useful. Leave it in the "don't use table" state and use the MAF tables for adjusting fuel. The MAF tables are counter-intuitive at first, but you'll get it with some experimentation (and reading).
5) It adds or removes spark (+ is add, - is remove) from the final spark value at the given load value and the given temperature. So if the base table has, say, 38 degrees entered at 2000 RPM and 160 LV8, and the you're running at 200 degrees F, and the spark correction table has +4 entered in it at 200 degrees and 160 LV8, then the final spark output will be 38 + 4 or 42 degrees. This table allows you to change the spark output to correct for engine efficiency, performance, knock, etc, at varying temperatures.
6) Not really. Almost everything else (including everything above, actually) is very similar if not identical in functionality.

M

RednGold86Z

I've been assuming the Trans TPS Filter coefficient value is for Transient Throttle filter comparisson (Fast filter - minus - slow filter = trans TPS). Filter being %change vs change (if the signal increases by 5 units, and the filter is at 50%, then the filter value will increase by 2.5 units).
If you have 2 filters (one large, one small) on the same signal (one to cancel noise, the other to make a "delta"), a step change in the signal can be used to create a nice hump with decay in the "delta" filter value by just subtracting one from the other.
This hump with decay can then be used as your delta TPS, which is used for acceleration enrichment, which gives a nice peak and decay of fuel.

__________________
-Jeremy- EFI Calibration Engineer, Director of R&D, Software Designer (Fuel Injection Technologies - dianpen.com) - still in China since Nov '04!!!
86 Z28 - rusty, tired, and in storage - 89 GTA with plans, but - also in storage now needs paint - badly, 79 Malibu classic with 91 L98, 4L60, 3.73

87 Vette Owner

Thanks Mark - I really appreciate it! The TunerPro RT / AutoProm combination is great!

RednGold86Z - have you made changes to the "Trans TPS filter coef." parameter with noticeable improvements?

Thanks again!
Dan

Camaero

Thanks for the information! I was just coming on hear to ask this very question. I am completely new and have not even burnt one prom yet. Would you guys reccomend sticking with the 32b for now or going to this right away? I hear you have to discon your cold start injector? Would somebody explain?

Thanks!

87 Vette Owner

I am very new myself, but from everything I've read, switching to $6E is the way to go, as it is an improvement over $32B. There are a few more variables to look at (and learn, as you can tell from my post ), but most are self explanatory.

As I understand it, $32B handles cold start enrichment via the extra cold start injector (which I believe is NOT controlled by the PROM). $6E handles cold start enrichment via the 8 regular injectors (there is no 9th inj), and this parameter can be adjusted in the bin.

When switching from $32B to $6E, I've read that some people disconnect the cold start injector, others have left it with no issues. I guess it depends on how the car performs and how the cold start enrichment is set up in $6E.