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How hard to put in FI and how much $$??

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by ChevyCaGal, May 8, 2001.

  1. ChevyCaGal

    ChevyCaGal 3/4 ton status

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    Ok...SlickWilly is selling a FI set up for $350 in the parts for sale section. I am interested in this. However what all do I need to buy to do this besides the FI setup? Will I need a new fuel tank, fuel pump and so on? How hard is it to install? I will need help but plan on doing most myself. I am going to study up and learn all I can and do it myself to simply do it to learn. (Won't learn unless I do it right?)

    Here's the for sale post he made: http://www.chevycagal.homestead.com/steph.html
     
  2. gokartergo

    gokartergo 3/4 ton status Staff Member Moderator

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    If I an right you have a 86 also. You well also need new heads we have the older style and will not accept that intake.. He probably is including the intake .And you do need the fuel pump in the tank. I was thinking about getting it but. To much work for me right now. Dan
     
  3. xtreme_wlr

    xtreme_wlr 1/2 ton status

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    Well, he says complete so it hopefully is. I think on the 87 the fuel pump is in the tank but Im not positive. If he is including the fuel tank then you are set there if the pump is in it. Havent done this swap yet so I cant really help much more. Sorry.

    '78 Chevy 1 ton Stepside RockCrawler
    468 BB, SM465, NP205
    D60 front, GM 14Bolt rear w/ Detroit
    <A target="_blank" HREF=http://65.11.18.114>http://65.11.18.114</A>
     
  4. smp

    smp 1/2 ton status

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    Well if it is a complete system you shouldn't need to much. You need to do an electric fuel pump and a pressure regulator FI runs at higher psi than a carb a inline puller would work but best results would be an intank pump which you might be able to find for a newer blazer with FI.
    Make sure you get the wiring harness and computer.

    The only things i am not sure about are the distrubiter, how you would wire up the harness and if you would need a custom chip for the motor. I have looked in to a TPI injection but have not converted yet so i don't know from experance but i'm sure someone who has done it could answer these questions, i would like to find out also.


    <A target="_blank" HREF=http://WWW.SMP.COLORADOK5.COM>http://WWW.SMP.COLORADOK5.COM</A>
     
  5. KENT

    KENT 1/2 ton status

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    I have found the Haynes manual on fuel injection to be really helpful when working on my rig.

    Besides the fuel pump, regulator and manifold that have been mentioned, you will need to address the O2 sensor, EGR, anti knock sensor, and thermostat. And of course the obvious; wiring harness and ECU.

    Good luck.

    1989 K5
     
  6. ChevyCaGal

    ChevyCaGal 3/4 ton status

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    Hmmm....I'm thinking that maybe I will not be looking into this. I don't think I can afford it! Not to mention I don't have the tools when it comes down to it I bet. ARGH if only I had some dirt on a mechanic and could blackmale myself into them installing the FI! I just read a huge articale on what to expect. Holy crud....I had no idea. I don't think I am ready for this as much as I thought I was....!! [​IMG]

    "Suck Fumes Ford Boy"
    "I love my country, I fear my government"
    <A target="_blank" HREF=http://www.chevycagal.homestead.com/steph.html>http://www.chevycagal.homestead.com/steph.html</A>
     
  7. rich'90

    rich'90 1/2 ton status

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    For the price I am assuming it is a throttle body not TPI? If it is throttle body and is complete it should have all the sensors, computer, chip and all. That really should not be too hard to install. One suggestion is if you do get an in-tank pump, spend the extra money and get a good high flow, unless you like dropping the tank alot.
    good luck

    Go heavy or Go home[​IMG]
     
  8. Dirteater

    Dirteater Newbie

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    You do not need to install a fuel pump in the tank. The one in the tank runs at 6-9 psi same as a mechanical. The regulator is in the throttle body so that is included. As far as the intake goes you can get one designed for Holley Pro-jection from Jegs part #510-3000-49. I am converting from this system due to it's lack of extreme performance and I am spending way to much money. $1500 dollars so far and I haven't bought a single one of the small things.
    The wiring is the hardest part in your case, and that should be complete. Just don't expect it to be a weekend project.
     
  9. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Well the 87 is almost a aftermarket set up. It was retro fitted to the old body truck as opposed to it being included in the original design. The conversion should not be very hard. Probably do need the intake but you can make the intake work on the older heads with some machine work on the intake. The newer engines have the 4 center bolts at a different angle and just need to have it re drilled and use some RTV around the bolts. Personaly I would go with a external pump bolted to the frame. The factory in tank has a fairly high failure rate. You may need to change some fuel lines around also. $350 isn't too bad if it does include the intake and pump. I have heard of the TPI going for that price but the is much more sensative to the cam than the TBI. The TBI would be a much easier conversion.

    Diging it in the dirt with my K5's
    Grim-Reaper
    <A target="_blank" HREF=http://grimsk5s.coloradok5.com/>http://grimsk5s.coloradok5.com/</A>
     
  10. muddin4fun

    muddin4fun 3/4 ton status

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    Is it real fuel injection or TBI? I will eventually go to fuel injection, but it will be for a TPI. Hee hee!

    [​IMG]
    <A target="_blank" HREF=http://k5chevyblazer.homestead.com/home.html>http://k5chevyblazer.homestead.com/home.html</A>
     
  11. BurbinOR

    BurbinOR 3/4 ton status

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    Stephanie, the conversion to FI is not as bad as you are thinking, but you have to have all the parts up front ready, then do the changeover. The pump is best (IMHO) done on a frame mounted setup instead of in the tank. No need to change tanks, just plumb the pump to the frame back by the tank and you're good to go. Gotta have the wiring harness to do it right - we used the Painless Wiring harness for my TPI conversion - otherwise you are looking at using a factory harness and tracing wires till you feel like choking someone - the Painless (or any good aftermarket harness) will have all 'plug and play' type connections, just follow the instructions, etc. Gotta consider the O2 sensor, having a bung welded in your exhaust in order to do it right.

    FI conversions done by yourself ARE possible, just not for an average backyard mechanic. Lots of kits available from places like - turbocity, jagsthatrun, fuelinjection.com, etc. As you are already planning on doing, study ahead of time, then act.

    <font color=orange>'79 - 406 TPI -<font color=orange> K5#5 - <font color=blue>See it at---&gt;<A target="_blank" HREF=http://www.blazzinor.coloradok5.com>http://www.blazzinor.coloradok5.com</A>
     
  12. Executioner

    Executioner 1/2 ton status

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    "The one in the tank runs at 6-9 psi same as a mechanical. "
    Please explain ?
     
  13. ChevyCaGal

    ChevyCaGal 3/4 ton status

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    That's a good question...he never told me what kind of FI. I emailed to find out have to wait and see. The kind will make a difference and a difference on if I do it or not.....right now I am thinking not since my help just flaked on me not more then an hour ago. Something about how he has to work more now because gas is so expensive. What a whinner lol....but really I can't do it alone....so I am in limbo now to see what happens!

    "Suck Fumes Ford Boy"
    "I love my country, I fear my government"
    <A target="_blank" HREF=http://www.chevycagal.homestead.com/steph.html>http://www.chevycagal.homestead.com/steph.html</A>
     
  14. CaptCrunch

    CaptCrunch 1/2 ton status

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    Hey steph, I did this swap on my old 86 Blazer. It is pertty easy if it is TBI, which I assume cause it is all from a 87 truck. I avoided the head and intake swap by using a Holley adapter plate on a Edelbrock perf. intake. You could even use your stock intake, but you'll need to make some linkage adpters. I believe I still have it in my storage if you decide to do the swap could have it dirt cheap cause no real use for it here.

    Next I put in a FI tank and new pump and ran wiring to it, but you could get a small electric in line pump and put it in close to the fuel tank. You'll still need to run some wiring to it and run a return line back to the tank. TBI runs at 11-13 psi!!! I suppose you could call around and ask on a high performance mech pump, but the small electric will work great. Run it to a adj. fuel pressure regulator (I have used the summit ones... worked fine and pretty affordable) and a block off plate for the mech fuel pump opening.

    You'll want to get his computer and wiring harness and sensors if possible. O2, oil pressure, and coolant sensors are the same if I remember right. But you'll need a knock sensor. IU'd also double check for ESC (elec. spark control)... is it in either vehicle? If you truck is a CA madel 86 it should have it(It will also already have knock sensor in it too)... if it does I'd take a peek to see if the 87 does. This was never an issue for me because I just got a msd distributor that was vac advance (or you could just find a used vac HEI distibutor on ebay or from a member pretty cheap and avoid these hassles... or just get his with the FI parts and have no worries) Can't think of much else... worst part of it would probably be running the wiring harness ... but that's not even all that bad.


    [​IMG]
    1987 Chevy K5 Blazer- 350 TBI
     
  15. K5 NUTT

    K5 NUTT 1/2 ton status

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    Since my home puter is down for abit i have to borrow works...but when mine is up again i can answer all your questions as i finished the swap on my 79 this monday took 3 long days the way i did it but it was worth it! or call me on my cell at 602-616-3636...it would be easier to chat about it than type pages of dialog! You can buy a kit from howell for about $1400...but you would have and adapter plate to mount the TBi to your existing intake...and a fuel pump on the frame rail...wich can cause problems when you are running low on go juice. My system is all GM from the tank to the lines and functional egr and emissions system. The tank and sending unit are about $500 from GM...plus you will need a new late model k5 fill pipe assm....so if slick is including all these parts go for it...you can rebuild the tbi unit your self and have the injectors rebuilt ...new injectors from GM are $124 a pop...and thats with my good guy discount!

    Azblazer

    1979 K5
    1976 K5 Chalet
    1972 K10 Suburban
     
  16. Thunder

    Thunder 3/4 ton status

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    Here's my 2 cents Try these guys:<A target="_blank" HREF=http://www.turbocity.com/EFISingDtail.htm>http://www.turbocity.com/EFISingDtail.htm</A> The whole kit is around 1200 and should bolt right on.
     
  17. rubiconchevy

    rubiconchevy Registered Member

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    What about smog in california. I have a 73 and plan on doin the fuel injection thing so no worries about smog. What about her 86? Does she have to go to the old referee? More money? I don't know, so that's why I'm askin.
     
  18. JoeAngelicchio

    JoeAngelicchio 1/2 ton status

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    Steph, I think it's Jagsthatrun that have a good book on the swapping in FI systems. There may be other books too.

    <font color=green>Joe Angelicchio
    86 Jimmy 4+3, 35-&gt;39.5 tires,4spd
    </font color=green>
    [​IMG][​IMG]
     
  19. ChevyCaGal

    ChevyCaGal 3/4 ton status

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    The pump is way different...I've looked at like 3 books and a few sites? Where did you get this info from? It's incorrect the PSI is too low....I also have found a complete set-up with everything including a new gas tank, pump you name it all for $1250. So I dunno what you are going with but that seem extremely high? What is it TBI, TPI what? Just curious?......

    "Suck Fumes Ford Boy"
    "I love my country, I fear my government"
    <A target="_blank" HREF=http://www.chevycagal.homestead.com/steph.html>http://www.chevycagal.homestead.com/steph.html</A>
     
  20. ChevyCaGal

    ChevyCaGal 3/4 ton status

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    Ok...it's a TBI setup and here's what it includes....it's all the parts, air cleaner to the intake, distributor, lines, fuel pump, wiring harness, all sensors, coil, computer, all brackets, hoses, trottle cable and braket. As great as this sounds...I can't install this all on my own.....in researching this is too much for a newbie, which is me. Not to mention I'm thinking I'm gonna have to spend more cash which I don't have to get more stuff. Probably end up paying to have it installed if I get it. Plus...I have no idea if it would pass smog here. Nothing passes here! I can't risk spending that much time and money to fail. I bought some headers so Lord knows if this set up will work with that?! So ummm in other words....the TBI, may it rest in peace....not gonna happen for me I think..... [​IMG]

    "Suck Fumes Ford Boy"
    "I love my country, I fear my government"
    <A target="_blank" HREF=http://www.chevycagal.homestead.com/steph.html>http://www.chevycagal.homestead.com/steph.html</A>
     

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