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Am I missing something??

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by BMR, Mar 6, 2001.

  1. BMR

    BMR 1/2 ton status

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    I'm looking to buy a crate engine form a local Chevy dealer, the trick is that it's a 85 K5 which stock is a Carb and I'm going to install a fuel injection system. I was looking at the 350 H.O. long block but the guy told me that the engine was set up for a Carb and couldn't be used for the injection. Now what's the big difference if it's a long block? Theres no intake? I thought that I could get any long block and install whatever I wanted. Am I just missing something?? Or was the guy blowing smoke up my a*@.
     
  2. Chaz88K5

    Chaz88K5 1/2 ton status

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    I was wondering the same thing..whats the diff?

    "Hondas look good under a k5's tires"
     
  3. Cavalry

    Cavalry 1/2 ton status

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    I have a 350 HO never heard anything about not going EFI. If you break down the engine into parts all it is a hot 1997 vortec truck engine (and thats EFI). I have heard anti EFI stuff about the towing 502. Something about severe leanout? I cant remember. The new "Ram Jet 350" GM12495515 Is a 350HO with a new GM EFI They dint have any problems. I dont know what kind of price you are getting at the dealership but check these guys out <A target="_blank" HREF=http://www.paceparts.com>http://www.paceparts.com</A>

    Luke
    84 K5
    [​IMG]
     
  4. HarryH3

    HarryH3 1 ton status Author

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    You can run EFI on the HO 350. You just need to have a custom chip burned to make sure the engine gets enough fuel under all driving conditions.

    You also have to make sure that the injectors that you use are physically capable of providing enough fuel to feed it under high-rpm, high-load conditions. (Like running WOT up a long grade with the truck loaded or towing). If the mixture leans out for very long at a time like that you can kiss those pistons goodbye. [​IMG]


    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
     
  5. muddin4fun

    muddin4fun 3/4 ton status

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    The block is the same, the heads are different.

    [​IMG] Keep your feet dry [​IMG]
    <A target="_blank" HREF=http://muddin4fun.coloradok5.com>http://muddin4fun.coloradok5.com</A>
     
  6. fad2blk99

    fad2blk99 1/2 ton status

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    Depending on how much cash you wanna drop, get the 350HO then get Edlebrock's Multi port fuel injection kit --its about 2 grand :( . This kit comes w/ everything you need and is made for '85 and earlier engines w/o fuel injection. Its what I've been drooling over for a while. -Tommy
     
  7. Blazer79

    Blazer79 1/2 ton status

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    Could it be they're selling you an engine with Vortec heads and they are talking about a Camaro or similar fuel injection? TPI and TBI wont fit Vortec heads.

    <font color=blue>//////
    <A target="_blank" HREF=http://blazer79.coloradok5.com>http://blazer79.coloradok5.com</A>
    </font color=blue>[​IMG]
     
  8. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    I think it may have to do with the intake. The carb motors run a intake where the center 4 bolts are in line with the head (angled through intake). the FI motors run heads where those bolts are straight up and down. My bud just put TPI on a crate and had to have the holes redrilled and a flat spot machined. It worked fine and he has not had any intake leaks.
    He also had to have a new chip burned to make it run right.

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

    BMR 1/2 ton status

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    The engine does have Vortec heads. TPI and TBI won't work with Vortec heads? That doesn't sound right?
     
  10. BMR

    BMR 1/2 ton status

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    Where could I get a strong 350 long block that will take a TPI or TBI system? Am I just asking the wrong questions at the dealership? Or should I just order an engine from a 87 or higher to be sure that it will take it?
     
  11. muddin4fun

    muddin4fun 3/4 ton status

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    That would prolly cost you the least, cause other wise you would be ordering a short block and then ordering different heads.

    [​IMG] Keep your feet dry [​IMG]
    <A target="_blank" HREF=http://muddin4fun.coloradok5.com>http://muddin4fun.coloradok5.com</A>
     
  12. dyeager535

    dyeager535 1 ton status Premium Member

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    The "guys in the know" say that the ram jet is a waste. It is not an effective fuel injection system.

    I can't imagine why you would have problems with injection on any SBC. The plan of attack should be to buy a long block (although you will end up with a carbed intake I believe) and get the entire TPI setup out of a car, IF the wiring is all long enough. Easily lengthened. As someone else mentioned you can get TPI F-bodies for pretty cheap. Don't buy the parts seperately though, you will pay through the nose trying to get all of them. Buy the entire system off of the F-body, and swap it over.

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  13. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    My bud did it with the same pre 86 model long block crate motor I have. Just redrilled the the 4 holes to the correct angle. I think her got the FI for $400 complete. Then he had the chip burned to kill the ig loc and handle the cam in his motor. Runs great!

    Diging it in the dirt with my K5's
    Grim-Reaper
    <A target="_blank" HREF=http://grimsk5s.coloradok5.com/>http://grimsk5s.coloradok5.com/</A>
     
  14. Emmettology 101

    Emmettology 101 3/4 ton status

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    Another thing is the Carb'd engine use different cams than the TPI/EFI engines.....

    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>
     
  15. BMR

    BMR 1/2 ton status

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    So basically to aviod trouble, just say that she's a 87 or so. That way I don't have to worry about the cam or having to redrill new holes in the heads.
     
  16. Emmettology 101

    Emmettology 101 3/4 ton status

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    Well, some 86's had carbs. 87 was all TBi and TPI I believe...

    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>
     
  17. BMR

    BMR 1/2 ton status

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    Alright I will order a 87 350, 4 bolt main, this should eliminate all possible problems. Thanx
    Any Objections??
     
  18. dyeager535

    dyeager535 1 ton status Premium Member

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    As long with it comes with flexplate you should be ok, since the '87 is a one piece rear main that takes a different flexplate, correct guys?



    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  19. Gandolf

    Gandolf 1/2 ton status

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    Emmettology 101 is correct. The TBI motors use a different cam. Talk to your Chevy dealer and ask if Chevy offers a TBI cam for that crate motor. If they don't, then ask if Chevy recommends a TBI cam for that crate motor. If the dealer sounds like they don't know what you are talking about, then call other Chevy dealers that specialize in crate motors. You need to find someone who knows what they are talking about. If you still can't find one, send me an private message and I will look into it for you. I know someone who is quite knowledgeable on this topic but I don't want to flood him with calls.


    '89 K5 Silverado..."You can’t have a real adventure, unless the outcome is truly uncertain".
     

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