Bringing TBI and Multi Port Fuel Injection to a New Level.     EFI Conversions and Tuning! Seattle to Portland! E-mail Tuning Consultant!
Page 1 of 6 123456 LastLast
Results 1 to 15 of 82

Thread: help vortec 350 tbi programming

  1. #1
    Fuel Injected! tamperedchevy's Avatar
    Join Date
    Mar 2014
    Age
    30
    Posts
    45

    help vortec 350 tbi programming

    I have an 89 chevy 1500 350 gmail goodwrench engine
    With these upgrades:
    -vortec heads 185cc runners 2.02 valves
    -Comp cams nostalgia 211/218exh. Duration@.50
    420/426int lift
    -Trick flow chromoly 7.75" pushrods
    -Scorpion narrow body 1.5 full roller rockers
    -Longtube headers to 2.5 duals,x-over, no cats
    -Extreme EFI 50mm TBI
    -Dual plane high rise air gap intake(summit)
    -New stock injectors with 18psi
    -3 wire o2 sensor
    -No egr
    -Custom starter chip

    I have moates stand alone software to burn, tunerpro to adjust and winaldl to log. Burn2 unit and g2 adapter to use the better chips.

    My idle BLM is 80. From 90 to115 while driving. And I have a bad hesitation after it warms up but only from a low rpm or stopped throttle smash. 21" vacuum but the cam is only .20 over stock(does this sound good?) no vacuum leaks unless it's in the brake booster.

    I lowered my BPW by 30 and in Egr. From.71 to. 52 off someone's recommendation. It didn't do much of anything is there somewhere else to adjust this. Where should I go from here?

    Timing is at 4* advanced with that spark wire unplugged
    I've read lots online on this but after weeks learning and days logging and programming I figure I need to figure this out. So here I am
    Last edited by tamperedchevy; 03-11-2014 at 07:42 PM.

  2. #2
    EFI GearHead ! EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    57
    Posts
    10,477
    Sounds like you have a good start on equipment!

    What ECM/PCM? Mask ID?

    No reason to run ancient WinALDL when you already have TunerPro RT, it will do a more detailed data log.

    Not sure who told you to change BPW in EGR? You don't even have EGR? Make sure you have disabled the EGR properly in the bin because there is no data in $42 to tell if it's on or off... but still changes fuel and spark when it thinks it's on.

    First thing I'd do is search the site for the Vortec Head timing tables Dave W did for us in a spreadsheet and get it in your bin. With that and maybe a few more degrees at idle area, you don't need the extra 4* at distributor.

    Here's a greaqt writeup on how to adjust your fueling from BLM data.
    http://www.gearhead-efi.com/Fuel-Inj...E2-Fuel-Tables

    21" of vacuum is great at idle! The hesitation is due to the Vortec headsw as well, will get better with proper advance but still needs sometimes 200% more AE to get rid of the hesitation when accelerating.

    That should get you going...

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  3. #3
    Fuel Injected! tamperedchevy's Avatar
    Join Date
    Mar 2014
    Age
    30
    Posts
    45
    7747 $42
    So is the're only one place adjust bpw? It was 135 I dropped.it down to 108 using the spreadsheet calc. Dave w.
    And I have the spreadsheet for blm ve table corrections. Is it time for that. I don't like my idle having 80 for blm. Thought I should. Fix this b4 I move to ve corrections.

  4. #4
    Fuel Injected! tamperedchevy's Avatar
    Join Date
    Mar 2014
    Age
    30
    Posts
    45
    Good thread link. I forgot about that one. I've read so Many.
    Ok. This is my game plan
    I'll add my ve2 to ve1 put them 30-95 then go for a long log tomorrow and adjust my blm with the VE corrections spreadsheet add them in smooth out my table and go for another long log. Sound good? It's on unless it doesn't sound good
    Last edited by tamperedchevy; 03-27-2014 at 07:14 PM.

  5. #5
    EFI GearHead ! EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    57
    Posts
    10,477
    Yes there is only one setting for the BPW/BPC in $42. It's calcualted by fuel pressure and injectro size.

    There's a lot of controversy on it's use in tuning and can be fudged a bit. But it is a set it and forget it calibration number that goes into the bin and is now part of the fueling calculation.

    A lower number does come out to be leaner.

    Here's a recent quote:
    Quote Originally Posted by EagleMark View Post
    Everything you've read and stated is true. But you can set up a stock 5.7L to run 22 PSI with these calculations and it will run just the same, no added fuel? When BPW/BPC number gets lower it will fire Sync fueling to higher RPM without going static/100% IDC. Like BPW of 135 goes static at about 3600 RPM.., this is why Cop Cars had bigger injectors and lower BPW... but with a WB on it's still getting enough fuel to keep AFR to 5000 RPM because it goes Async fueling and the calculation changes.

    Want my secret information for tuning with higher pressure after I learned and figured out all this stuff? Just raise pressure, leave settings alone and you will have more fuel available and tune VE!
    http://www.gearhead-efi.com/Fuel-Inj...-fuel-pressure

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  6. #6
    Fuel Injected!
    Join Date
    Feb 2013
    Location
    Euless, TX
    Posts
    1,433
    Quote Originally Posted by EagleMark View Post
    Yes there is only one setting for the BPW/BPC in $42. It's calcualted by fuel pressure and injectro size.

    There's a lot of controversy on it's use in tuning and can be fudged a bit. But it is a set it and forget it calibration number that goes into the bin and is now part of the fueling calculation.

    A lower number does come out to be leaner.

    Here's a recent quote:


    http://www.gearhead-efi.com/Fuel-Inj...-fuel-pressure

    Actually if you are using EGR there is a whole table for BPC in $42.

    That being said I would set the ignition timing at the distributor to 10* BTDC and set the initial constant in the .bin to 10* BTDC. This will help a cammed/vortec head engine start easier and run better if it ever goes into limp home mode.

  7. #7
    Fuel Injected! tamperedchevy's Avatar
    Join Date
    Mar 2014
    Age
    30
    Posts
    45
    Alright, got my blm around 110-130, got some fine tuning still but was wondering, when should I do AE? And what do I move to next? Spark tables? Maybe can I get a list of things to do in order. That could help other noobs like myself. Like when to do AE, PE or when to do spark tables and I guess hiway lean cruise would be last?

    And I'll throw a log and some blm data up here in a couple days so I can get a few more eyes on it for approval to make me feel better lol
    Last edited by tamperedchevy; 03-11-2014 at 06:53 PM.

  8. #8
    Fuel Injected! tamperedchevy's Avatar
    Join Date
    Mar 2014
    Age
    30
    Posts
    45
    Haven't got around to a log yet but my blm are around 117 for the neutral idle 135 for gear idle and between 122-130 for all other driving. I'd say that's nice.

  9. #9
    EFI GearHead ! EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    57
    Posts
    10,477
    It is and no reason to go nuts trying to get numbers absolute! They will just change with weather, temp, humidity etc... The magic of EFI working it's wonders...

    You can dial it in further if you want but won't notice a difference. It's well within the ballpark, actually infield! When fueling is that close the only thing I like to do is visually check VE fueling table for smoothness. Then a final data log in case the smoothing was out of line somewhere?

    Smoothing does not have to end up perfect. But it should not have any big dips, spikes etc... remember the number in the cell is interpolated with all surrounding numbers to come up with what ECM finally uses. These old ECM are slow enough that I don't want it to have to work real hard at math.

    Have you seen this?
    http://www.gearhead-efi.com/Fuel-Inj...E2-Fuel-Tables

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  10. #10
    Fuel Injected! tamperedchevy's Avatar
    Join Date
    Mar 2014
    Age
    30
    Posts
    45
    They looked good yesterday but I gave em one last adjustment now they look great! And yes I did see that post and added them together. Lows are 30's high is 92 on the VE.

  11. #11
    Fuel Injected! tamperedchevy's Avatar
    Join Date
    Mar 2014
    Age
    30
    Posts
    45
    Looking at the two AE tables on this thread at the second post, Dave has two tables up. His AE-tps table his goes to 50 percent tps mine only goe to 25 percent. If I used his tables as a starting point do I use his numbers up to the 25 percent tps-usec?

    http://www.gearhead-efi.com/Fuel-Inj...=tables+vortec

  12. #12
    Fuel Injected! tamperedchevy's Avatar
    Join Date
    Mar 2014
    Age
    30
    Posts
    45
    Is there any good AE threads out there?

  13. #13
    Fuel Injected! tamperedchevy's Avatar
    Join Date
    Mar 2014
    Age
    30
    Posts
    45
    i used the map and tps AE tables dave w posted in the second here http://www.gearhead-efi.com/Fuel-Inj...=tables+vortec and it made my hesitation better. right after i did althought it ran better it died once when i put it in gear.

  14. #14
    Fuel Injected! tamperedchevy's Avatar
    Join Date
    Mar 2014
    Age
    30
    Posts
    45
    going back to VE tables. i had big ve spikes to keep my idle in the right spot. and with a huge upward spike and a huge lower spike and it was still rick in neutral and lean in gear. so i redid the tables. man are they annoying. if i do a run and correct the table it just turns into a spike pit. maybe it was a bad day to drive. I want a carburator. could my spark tables be messing with me. Im not sure whrn i should tune this

    accidently deleted log so ill make another tomorrow
    can anyone see if this bins spark looks weird.
    Attached Files Attached Files
    Last edited by tamperedchevy; 03-17-2014 at 07:19 PM.

  15. #15
    EFI GearHead ! EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    57
    Posts
    10,477
    Your spark advance table does not look weird. But IMO that's way to much spark for your engine in a truck and if you add up spark, PE and adders you've got about 40* at WOT? But not enough spark advance at idle and the area you flattened probably does not match where your idling with that cam. Need to see a data log to check this and other things.

    In your first post you had a Custom Starter Chip, shouldn't they be helping you?

    Need at least another 100 RPM for idle for now.

    Also said no EGR? The EGR patch is not done and I don't think it's off the way you set it up?.

    There's a mistake in your MAP AE.

    Also several Parameters for an engine build like this need some adjustment and I'm not sure why you changed some things?

    Let's see a data log to see how your really doing!

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

Similar Threads

  1. Which programming software LT1 16188051 PCM ?
    By EDZIP in forum GM EFI Systems
    Replies: 6
    Last Post: 01-29-2014, 05:12 PM
  2. Bench programming a LT1 PCM ?
    By EagleMark in forum GM EFI Systems
    Replies: 22
    Last Post: 01-25-2014, 06:37 PM
  3. PCM Programming for Dummies?
    By ezobens in forum OBDII Tuning
    Replies: 5
    Last Post: 12-16-2013, 10:37 AM
  4. Replies: 12
    Last Post: 08-30-2013, 09:13 PM
  5. LT1 PCM Benchtop Programming with 7747?
    By EagleMark in forum GM EFI Systems
    Replies: 0
    Last Post: 06-18-2012, 06:23 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •