Ok heres the new bin file...I scaled the coolant temp vs AE tables and the LV8 tables and I lowered the decay rate and added more numbers of pulses and it still does the same bogg but now it will bogg when I rev it at idle. Guys I really need some help here. Anyone wanna set me straight?

bogging bin

Please help????
See my other threads for more info too
https://www.thirdgen.org/techbb2/sho...hreadid=186754

https://www.thirdgen.org/techbb2/sho...hreadid=185415

new bin with bogg at reving gone.....still bogg about 1/2 throttle

maybe try upping the ae vs. delta lv8 table in the middle to lower range, the table only has 4 or 5 lv8 values in it, like 0, 64, 128, 192, 256 just a thought. mine are .10, .16, .23, .27, .27 I don't know how relevent that is because I brobably have other stuff in the chip done differently but hope it helps

I've studied your bin and your bogg~2k data log. The area I found interesting was the MAF airflow. At the area of the bog the airflow drops like a rock in a couple spots. Along with this drop is the corresponding drop in injector PW.

I would first revisit the mechanical areas. Make sure there are no air leaks between the MAF and the throttle body. Then check the MAF connections and do the MAF tap test. Double check the timing. Did you gut the MAF at all??

Fix, test, & repeat until no problems there.

If the bog still exists it is then time to change some MAF tables. First area to change is the max airflow vs RPM table. Your data log shows that you are right at the limits in some areas. Between 1200 & 2800 RPM add 10 to 15 gms/sec to each of the entries.

There is also the possibility that you are tripping the MAF high diagnostic and going to a default MAF value. The value at $210 should be increased. It is currently 45 gms/sec and it looks like 65 gms/sec would be a good value (this area needs a better look-see as the hac I have has some errors in this area).

Once those two areas are changed try for the bog again.

If the bog still exists then it is time to change the MAF scalar tables. The area of the bog is at the end of table 3 and the beginning of table 4. So you get to play with two tables.

If you need some info on how the MAF scalar tables operate I made some posts to a MAF thread. In this thread I explained all of the math from the MAF input to the creation of the LV8 term.

Funstick and Grumpy have also made posts pertaining to this info.

RBob.

Thanks so much for the reply....I am going to try that stuff right away. I have done the MAF tap test and checked for leaks but I cant find any. The timing is set at 6 degrees and the MAF sensor is descreened. I did this mod about 3 years ago. Shold I add some gms/sec to the MAF tables to compensate here?

The table you talk about here..
"First area to change is the max airflow vs RPM table. Your data log shows that you are right at the limits in some areas. Between 1200 & 2800 RPM add 10 to 15 gms/sec to each of the entries."

Is that the table that thae table in tuner cat that is titled Mass Air flow vs RPM (diag)? It has entries from 0-6400 for RPM and gms/sec?

That sounds like the correct table. Here are the values in your current bin:

addr gms/sec
00600 23
00601 23
00602 30
00603 48
00604 68
00605 89
00606 111
00607 141
00608 170
00609 200
0060A 220
0060B 236
0060C 245
0060D 247
0060E 247
0060F 247
00610 255

First column is address, second is the max gms/sec. So if this matches the Tunercat entry then it is the correct table.

RBob.

Yep those are the same values......I will have some more info later today cus I gotta work. I am gonna add 15 to those values like you suggested and see if the bog is still there.
What do you think about the AE tables? Is there too much fuel there or to little. What are some boundries of the tables....for example I have the table that has the number of accel enrich pulses vs coolant temp set to 44. Is that normal..I am just trying to get an idea of on a setup like mine what would seem too much/too little????

Thanks!!!

email me your phone number i can make it down this weekend.

changes didnt help...

That is actually OK. Tuning is a process of steps and elimination. If you had not made the changes to the max airflow vs RPM table then the MAF scalar changes would have had no affect.

It has to do with how the ECM software operates.

At this point in time you will need to adjust the MAF scalar tables. You had also inquired about the AE tables. This is an area of the MAF code I have never looked at. My only suggestion here would be to use the ARAP parameters and possiblby enrich them 10-15 %. In MAF scalar tuning AE is an area to avoid. By this I mean to keep the ECM from invoking it.

With the MAF scalar tables you need to change how you invoke the problem. You need to get into the bog area with a minimum of throttle movement. Try something like second gear, and hit the throttle just enough to accel through that area, all the while holding the go-pedal steady.

Data log this area and see what is going on. Then make changes in that area of the table and re-test.

One thing to remember is that your engine to so different from a stock GM engine. And you have changed the MAF calibration when the screens were removed. This is one of the reasons for the required increase in the MAF vs RPM table. Your new engine will now pull more air per RPM then the stock calibration will allow.

So some trial & error is going to be required to get the setup operational.

RBob.

Unfortunately I have no knowledge of how to mod the MAF scalers. I try to increase the values in the MAF tables in tuner cat and I just get an error message and it sets to its maximum gms/sec whis is no where near what I would like???
Would this be the time to go MAP??

Also when I am going about 10MPH or higher the bog is no where near as bad as when I am stoped and giving it a 0-1/2 throttle off the line. The thing pops and sputters and the rpms crash..... See the damn car wont even break the tired loose..... Its almost like the engine totally cuts out. Now if I floor it off the line the car wont bog nearly as bad and pulls through the rpms. But it seems that it has no ***** off the line. I took the car to my mechanic and he said that the cam is not making power till higher in the power band and the stock 2.77:1 gears(BW rear) is loading the engine too much. Then when the stall catches it just makes it worse......my stall is about 2600rpm..
I dunno....maybe MAP is the way to go...but I will be really disapointed if I do the convert and its the same????
HELP!!! hehehehhe

Thanks!!

Time to learn about MAF scalar tables:

https://www.thirdgen.org/techbb2/sho...hreadid=181744
https://www.thirdgen.org/techbb2/sho...hreadid=114856

Another thing to do is to look at the data logs for the OK pull out and the bog pull out. You will see a difference in the air flow. With this you will get a better idea of which areas require changing.

Yes, lower gears would help but you will be able to get rid of the bog.

RBob.

I did some more searching last night. I downloaded the $32 hack and looked for the MAF tables. Well I really dont see how it coresponds to the hex editor file.

;----------------------------------------
; Mass Air Flow TABLE 3
;
; TBL = gms/Sec * 3.08
;----------------------------------------
LC6B3: FCB 83 ; TABLE SCALAR
LC6B4: FCB 8 ; 9 LINE TBL
;----------------------------------------
; gms/SeC BIN VDC #/HR
;----------------------------------------
FCB 147 ; 47.7 768 2.19 368
FCB 158 ; 51.2 800 2.29 395
FCB 170 ; 55.1 832 2.38 425
FCB 182 ; 59.0 864 2.47 455
FCB 195 ; 63.2 896 2.56 488
FCB 209 ; 67.8 928 2.65 523
FCB 223 ; 72.3 960 2.74 558
FCB 238 ; 77.2 992 2.83 596
FCB 253 ; 82.0 1024 2.93 633
;----------------------------------------

This is MAF table #3 in the hack so to find the scaler I need to look at hex address 6B3? Now in the editor I think address 6B0 is
6b0h: FA 00 7F 00 80 00 00 F1 00 F2 00 BD 01 1E 01 1F 00
So 6B3 is FBC 00????

But its says in the hack that the table scaler is 83...
I am lost............. Could it be because I am using the$32 hack and comparing it to the $6e code. No one has hacked $6e???

if you email me your $6e tdf (to proivide proof you own a copy) ill email back mine with the scallers added.

As you found the locations are different between $32 & $6E. Here are the scalar/table locations for $6E:
RBob.

Ok I understand where the scalers are now and from funstick's post I understand how they work.
https://www.thirdgen.org/techbb2/sho...+table+scalers

But what are the limitations? What do you recommend I change the scaler by the first time? Could you do a little write up on what exactly needs to be done to the code for the change.....or can I just edit that value and recalc the check sum and burn??

How many grms/sec should I add to tables 3 and 4?

I can't really say what to change the values too. The only limitation is 255 gms/sec measured. (I ache a bit, swapped a another motor into the Elky today, so a little hard to type).

Look at the bog data log for the gms/sec leading up to the problem. Increase the gms/sec values in the tables by say 25% at the maximum point. You should taper the increase in.

One thing to do is to graph the full 6 scalar tables as one in Excel. That will give an idea of how the curve looks. Then fatten up the area leading into and including the lean (bog) area. Then graph tha tin Excel and see how it looks.

Then of course try it and data log. Then study the data log along with how the differences felt in driving.

Remember to go from one table to the next smoothly. Look at how the stock tables connect together to form one continuous curve.

RBob.

P.S. One thing to remember is that I have never tuned a MAF engine. I understand how they operate, just can't say flat out, oh, add 5 here and 8 there and it'll work. Tuning is an art, not a science. Hang in there, it'll come to you.

to be honest i dont think its a maf table issue. theres something wrong with the sensor or the max airflow table is limiting total fuelking.