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Type: Posts; User: SkinnyG

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  1. Faintest of surging the other day, so I added 10%...

    Faintest of surging the other day, so I added 10% more INT Delay Base, but it became ever so slightly worse, so I put it back and took 10% out, and it was a lot worse. I put THAT back, and then added...
  2. Drove pretty good today. Pleased.

    Drove pretty good today. Pleased.
  3. Usually it's been "I think I got it" only to...

    Usually it's been "I think I got it" only to discover more surging the next day, and repeat and repeat.

    Except I drove it last night to pick up my sweetie from work, and it was fine. No surging....
  4. Oh golly. Still more surging. Very light...

    Oh golly. Still more surging. Very light throttle cruise.

    This was also an inspirational read: https://www.thirdgen.org/forums/diy-prom/724756-prp-gains-int-delay.html

    Looking at datalogs I...
  5. Slight change, but only a small drive for...

    Slight change, but only a small drive for testing. I changed BOTH the O2 Proportional Gains AND the INT Delay O2 Error Multiplier to be 75% of stock. Brief drive feels really good with zero...
  6. I'm just after "good enough to sell it." I want...

    I'm just after "good enough to sell it." I want the money out of it, to put into a different project. I thought I had it close, but I will get it sorted (or restrict it to run with zero INT or BLM...
  7. My cam is 213°/219° @050, 112LSA. Pretty mild....

    My cam is 213°/219° @050, 112LSA. Pretty mild. Mild avoids the "snowball" of tuning issues and required support (gears, converter, etc). My daily driver ('77 Squarebody) runs a 231°@050, on a 108LSA...
  8. Went for a drive yesterday, 100°F heat. There was...

    Went for a drive yesterday, 100°F heat. There was still some noticeable surging 20-30kPa from 2000 to 2500 rpm, so I fattened the table up there.

    Also increased O2 Proportional Gains at the low...
  9. Oh, interesting. A couple LOW VE cells at 1200...

    Oh, interesting. A couple LOW VE cells at 1200 low map. Tweaked the numbers to make more sense, and re-uploaded.
  10. Some minor tweaking this morning before it got...

    Some minor tweaking this morning before it got too hot.

    Fattened the idle a bit, O2 numbers be danged, I want a stable idle. Good solid and reasonably low MAP signal here.

    Dropped a bit of...
  11. I cannot get this ECU to actually stop going into...

    I cannot get this ECU to actually stop going into closed loop, but I can restrict both the INTs and the BLMs from going anywhere, and I've actually done really well by looking at average O2 voltage,...
  12. BLMs are currently 126 to 129s.

    BLMs are currently 126 to 129s.
  13. Did three more datalogs and tunes, and it's...

    Did three more datalogs and tunes, and it's running a whole lot better. I had less and less surging with each tune, but this was mostly all light throttle.

    Note: The BLM Coolant Temp Thresholds...
  14. With vacuum set up, I get 12psi at idle, which...

    With vacuum set up, I get 12psi at idle, which should make the injectors happy. It "felt" a whole lot better driving around, but my BLMs weren't moving, so I just did some slight smoothing and...
  15. Got a PM suggesting the higher fuel pressure...

    Got a PM suggesting the higher fuel pressure might be an issue.

    Which got me thinking, and looking back at the logs. It doesn't seem to find stoich at idle at all, which is the same VE value as...
  16. Today I reduced the Injector Bias by 20%, and...

    Today I reduced the Injector Bias by 20%, and increased the VE table by 20%, turned off PE, unlocked the BLMs from 128, and went for a drive. 20% brought the highest VE to 90.

    Had a slight surge...
  17. The thing I don't get, is if the VE cells are...

    The thing I don't get, is if the VE cells are supposed to be under 95 (90 is better), then how does that work if the tables stop at 3200, and I'm revving to 5500? I wouldn't need -less- fuel there,...
  18. 30kPa is light cruising. This is a Pontiac...

    30kPa is light cruising. This is a Pontiac Firefly (a Chevy Sprint); it's quite small and only 2400lbs.

    I have some data to share, and I have some questions

    DATA

    I took everything that had...
  19. I put a new header gasket in (2.5 hours, grrr),...

    I put a new header gasket in (2.5 hours, grrr), and went for a rip. Out of sheer misery, I just went fatter and fatter just to see what it would do. Within a couple blocks I could feel where the...
  20. The error codes were all fixed a while back, I'm...

    The error codes were all fixed a while back, I'm not getting any error codes since then. My bad for not getting back to y'all.

    I have no speed sensor.
  21. Well, you guessed it. Tightening the bolts...

    Well, you guessed it. Tightening the bolts didn't work. So, I'll pick up a new header gasket tomorrow. Remflex this time, because grrrr.

    Sweet fuel pump pressure, though!
  22. I'm using a liquid-filled gauge that came with...

    I'm using a liquid-filled gauge that came with the regulator.

    Previously I had just the gauge threaded into an aluminum T that I machined so I could read the supply pressure. The gauge...
  23. I initially used the amyb_88 5.0/5-speed bin, but...

    I initially used the amyb_88 5.0/5-speed bin, but there were some significant differences between that and the 5.0/Auto bin from my existing factory chip. Throttle Follower, in particular, drove the...
  24. I did 7 drives today, tweaking the VE after each...

    I did 7 drives today, tweaking the VE after each run. One thing I noticed is that the fuel pressure is not staying consistent. It's fluctuating quite a bit at idle (+/- maybe 3psi?), so who knows...
  25. I swapped the stock NBO2 back in, and the average...

    I swapped the stock NBO2 back in, and the average voltages are confirming what I'm feeling, and still in line with what the WB simulated NB was doing. Still lean in a few spots, largely cruise...
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