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Fuel Injection, which kit to use

Discussion in 'The Garage' started by shupach, Jun 26, 2002.

  1. shupach

    shupach 1/2 ton status

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    i'm gonna go w/ fuel injection on my engine and i was just wondering what everyones experience/opinion on the kits are, i am currently lookin at the Accel kit(dont know specifics just told to get it), the Holley 950 cfm, kit, and the edelbrock kit(the one i like the best so far). Anything you know bout these kits would be greatly appreciated.

    phill
     
  2. shupach

    shupach 1/2 ton status

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    ttt, come on someone needs to know something

    phill
     
  3. MTPockets

    MTPockets 1/2 ton status

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    i am using a holley pro-jection 670 cfm 2bbl kit...on a basically stock 350. once i figured out how to run a proper ground wire /forums/images/icons/crazy.gif i have had excellent performance. i am running the closed loop kit...o2 sensor. hooked up a fuel/air guage for easy tuning as well.

    you might check parts for sale...i think i noticed someone selling this kit.
     
  4. Mudzer

    Mudzer 1/2 ton status Author

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    Is your ProJection the Digital Di version? I just bought an Analog system. Hope it works better than what I have!
     
  5. TopOff

    TopOff 1/2 ton status

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    If you have a mostly stock engine, I would try and find a factory FI. It really depends on what you plan on doing with your truck. I like the idea of finding any failed component from a stock FI in any old parts store. The trick is to know what year FI your running.

    That being said, I have the Howell Fuel-injection setup. Basically, this is a rebuilt factory setup with the Holley TBI. It is closed loop, using all factory parts, even the factory computer. It was a bit more than I should have spent though. I think you can find a TBI setup for ~250-$400. I have even seen them on this board for that price!
     
  6. shupach

    shupach 1/2 ton status

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    thanks for the input, however this will not be stock, i plan on running around 10-11:1 cr and a big cam (.480/.498 lift) after lookin at them again, accel has two kits, one really expensive and one thats not that bad at all, just more stock oriented, the holley looks great, its is a bit steep, however my mechanic at the GMC dealership said it was crap, i just wanted yalls input since i think your applications are much more similar to mine, finally the edelbrock looks great, its even got an onboard calibration module /forums/images/icons/shocked.gif. What im really asking now, is the Holley Commander 1000 cfm MPI system worth the extra 400-500 bux i would hafta dish out for it over the Edelbrock Performer RPM Pro-Flo Efi system.

    phill
     
  7. lizard

    lizard 1/2 ton status

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    Me, I'd pull a computer, harness and fuel system from a TBI equipped truck. Factory parts rules.
     
  8. MTPockets

    MTPockets 1/2 ton status

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    using the digital system mudzer...the 2Di.
     
  9. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color="blue">One more vote for a factory setup. I'm halfway through installing a 91 TPI setup off a camaro onto my 71 in place of the carburetor. I'm using the factory wiring harness. I started the wiring tonight and it's easier than I thought it would be, as long as you have good diagrams (I can scan some if you need it)
     
  10. shupach

    shupach 1/2 ton status

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    a factory system sounds tempting, but im pretty much sure im gonna go w/ edelbrock, it looks like a really good kit, plus i luv the little calibrator thing and they burn a custom chip free to the specs of your cam, plus if stuff breaks i could probably get it warranteed by them. if i were staying w/ a somewhat stock engine, then i would of gone w/ the factory system. thanks for the input though, ill put some pics up when she's done.

    phill
     
  11. K5Jimmy

    K5Jimmy 1/2 ton status

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  12. shupach

    shupach 1/2 ton status

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    sweet, thats gonna run the same price as the edelbrock though, whats the major difference between TPI and multi-point? im assuming i could find performance parts for the the tpi since its off of the GM's.

    phill
     
  13. K5Jimmy

    K5Jimmy 1/2 ton status

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    Sorta what I wuz thinkin' myownself....thinkin' 383 from Scoggins, Tpi...they list a "pulley kit" that includes a new compressor, alt, ps pump, etc for $699...I'm wonderin' if I can use all that off the front of my 89TBI, and maybe use an electric fan...
     
  14. m j

    m j 1/2 ton status

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    I like the electromotive $tuff
    Distibutorless ignition system is too cool.
    no more cap n rotor to replace
     
  15. Derf00

    Derf00 1/2 ton status

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    Edlebrock won't burn a chip for anything but an almost stock engine. Anything more than stock, you are talking custom chip, and they don't burn custom chips they will refer you to Superchips. This is according to the guy I talked to on their Tech line Tuesday. Also read carefully the Tech articles about the ProFlo and the MPFI systems. I am going to use the MPFI on my upcoming 383 transplant mainly because I want to remain emissions legal /forums/images/icons/grin.gif .
     
  16. shupach

    shupach 1/2 ton status

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    actually after checking out speartech.com im really leaning towards their kit. I just need to ask em some questions bout chip availibity etc.

    phill
     
  17. lizard

    lizard 1/2 ton status

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    Take all that lovely cash you would spend on a Edelbrock System, purchase the complete EFI system from a factory truck. 250-450 is a good price for the wiring harness, fuel lines, tank, pump, ALL the sensors and charcoal canister. Make sure you get the COMPLETE system from a 350 truck because the throttle body is bigger than one on the Camaro. Get all the emmissions parts too. Now get a eeprom burner from here:

    http://xtronics.com/memory/EPROM.htm

    purchase a UV eraser from here(part no ER2-ND):

    http://www.digikey.com

    Then look for software on these sites:

    http://www.tunercat.com
    http://www.andywhittaker.com/ecu/index.html

    Get an interface cable from:

    http://www.akmcables.com

    Finally get the factory manual for the donor truck at:

    http://www.helminc.com

    Now you are ready to read, erase and write your eprom and should have ample choices on tuning software. The factory manual will have the wiring harness diagrams, troubleshooting/diag routines and will pay for itself over and over again. You will want to checkout www.diy-efi.org/gmecm for example binaries, tips and the best mailing list on the net (don't forget to download and read the "7 years worth" of archives!!!) It will take some time to learn but in the end you will have the ultimate control over your ecm and will be able to make changes to the code in just a few minutes. If it breaks you can fix it with a trip to your local parts store AND you'll know what the hell you are talking about because you built the friggin thing.

    Bottom line is you will spend more time doing the factory system but the investment will be worth much more than any off the shelf system that you have to talk to tech support to get a new eprom burnt. Doing it yourself is the only way to get it "right".

    Total cost depends on your ingenuity. Estimate $600-$1500 with parts software and tools. 40 hours to install (I think 20 so lets double that /forums/images/icons/grin.gif ), 10-40 hours to learn to tune and unmlimited hours of fun driving .)

    While I'm at it here are some more links:

    http://chevythunder.com/
    http://www.customefis.com/
    http://www.cruzers.com/~ludis/
    http://www.passtimeracing.com/eric/
    http://www.mindspring.com/~amattei/aldl.htm
    http://www.techedge.com.au/vehicle/
    http://pweb.de.uu.net/pr-meyer.h/aldl.htm
    http://www.eecis.udel.edu/~davis/z28/
    http://www.thirdgen.org/newdesign/tech/
    ftp://ftp.diy-efi.org/pub/gmecm/

    Here is a diy computer that uses factory sensors:
    http://www.bgsoflex.com/megasquirt.html
     
  18. shupach

    shupach 1/2 ton status

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    i love this site, thanks so much for the info, now its time to start learning. just one more question, do i just grab the factory EFI from a dealership or just look for one at a junkyard?(i know its a dumb question but hey, i wanna do it right)

    phill
     
  19. BurbinOR

    BurbinOR 3/4 ton status

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    Boneyard...........anywhere else will nail you sans Vaseline. Lots of posts on this topic, do a search and read to your heart's content........... /forums/images/icons/laugh.gif
     

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