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  1. usar17

    TBI upgrades? what have you done?

    that seems like a lot of back and forth :/
  2. usar17

    TBI upgrades? what have you done?

    You become the official GMSB tuner and that would be sweet :) lol nice little side job
  3. usar17

    TBI upgrades? what have you done?

    ugh. nothing is ever easy :P What fuel pressures are you guys setting the adjustables to? Id like to add the body spacer and pod spacer. Then i'm assuming after everyone does their mods, PROM tune?
  4. usar17

    TBI upgrades? what have you done?

    and will the 350 intake match the 454 throttle body? What fuel presure are you running with that setup?
  5. usar17

    TBI upgrades? what have you done?

    454???? For the larger bore? Are you using 350 injectors with that base?
  6. usar17

    TBI upgrades? what have you done?

    any noticeable difference with ur dual snorkel intake? I was going to do that with mine when i had a carb. I have two carb air housings, i want to see if i can weld one to my TBI housing. I'm really looking towards a lot of the CFM-Tech products. one thing i have yet to comprehend is adjusting...
  7. usar17

    TBI upgrades? what have you done?

    Just thought Id ask, what all people have done on here with their TBI motors. Mods, proms, swaps, etc.... from the cheap and quick to the drawn out expensive. What have you done to make your square even more of a beast?
  8. usar17

    Serpentine Conversion question

    The cast markings on the back are 7832904. There is also a "23" stamped next to a "DF" inside a football looking oval. above the output port is "METRIC" then "0519"
  9. usar17

    Thinkin about a tbi swap.

    Guess this is a good time and place to ask.. What is a shunt? I see where they are on a fuse block, but what do they do?
  10. usar17

    Serpentine Conversion question

    With AC. Just tried a 970k6 belt. Little too loose. Its looking like deleting it and paying off the inspection police
  11. usar17

    Serpentine Conversion question

    Ok both pumps I have look identical. The85 305 and the 87 350. They have the same numbers cast on the back. So either GM truck smog pumps were all the same or the 87s was replaced with an older one. I'm just gonna remove it for now to get the truck running. I was also having a problem finding...
  12. usar17

    Alternator Upgrade

    Do I need the sense wire? Or why don't the gmt400s have one
  13. usar17

    Serpentine Conversion question

    I have everything from an 85 k10 305 and an 87 R20 350. ive only tried the 87 pump. im not free till thursday to look at it to see if the 85 is any smaller or different.
  14. usar17

    Serpentine Conversion question

    TBI issues? and how easy would it be to just hollow out the pump so it still looks legit? what year pump is that??? mine has a rubber hose that connects it to the diverter valve not a metal bracket/tube
  15. usar17

    Serpentine Conversion question

    I'll pull it if you guys have suggestion on how to pass a visual emissions test. And will it do anything to the ecm for the tbi by not having it there? I know it has a wire to the obd1 plug
  16. usar17

    Serpentine Conversion question

    I looked up smog pumps on auto zones website to compare product numbers. 87 Camaro and 87 v20 use the same. 85 k10 is different. I'm gonna try the pump from my 85 and see if there is any difference. I also looked up 1990 k2500 and its the same pump as the 87s. So Idk what to take out of all this...
  17. usar17

    Serpentine Conversion question

    I have bolts long enough. Are they smaller then the square body? Or what's noticeably different?
  18. usar17

    Thinkin about a tbi swap.

    idk about new holes :/ frame may already have holes where you need them to move the crossmemeber. and Jim seems to be the TBI master. There is another gentleman on here though that excels at wire harnesses
  19. usar17

    Thinkin about a tbi swap.

    If you swap on Vortec heads you will most likely need the ECM chip re-programmed. Tranny shouldn't be an issue at all
  20. usar17

    Alternator Upgrade

    To bring this back up. Whats the difference in the connections between these two styles. I'm going from an 1985 to a 1990 alternator with my serpentine swap. I know the brown wire can splice right into the newer connector, but what about the second wire that is present in the 80s style? The...
  21. usar17

    What is it...

    Name of harness? Or how to search for one?
  22. usar17

    Serpentine Conversion question

    These are the brackets I'm using
  23. usar17

    Serpentine Conversion question

    Lol wat? Its the grey brackets that don't attach to the water pump
  24. usar17

    Serpentine Conversion question

    1990 k2500. Has provisions for a pump. But I had to grind down the mounts on the pump to get it to fit inside the bracket. Then I had to rotate it bc of the output tube on the back hitting. Not tube is against the exhaust manifold. Thoughts?
  25. usar17

    Serpentine Conversion question

    Ok now we know you can easily transfer the brackets over from 90s sbc to earlier blocks. Now i need to retain my smog pump for emissions here in PA. so has anyone here done a serpentine conversion and maintained the pump? I'm tried a couple different things and i keep running into issues...

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