vortec

  1. Taterbug

    New 5.7 Install: Power Adders & Preventative Maint?

    Don't know much about engine internals and such, so I'm just looking for suggestions. I've recently sourced a new long block engine from a local race shop that's been rebuilt and machined. Essentially a crate motor at this point, everything from the heads down. My truck has all accessories and I...
  2. dAT OBS

    .GEN 6 454 VORTEC!!!!

    Anybody running Gen 6 454 blocks with carb or TBI and not using the gen 6 fuel injection...plan on installing gen 6 454 in at 92 GMC but not running about run carb really want the block for it's factory hydraulic-roller block...it seam to work just use different intake manifold Another...
  3. Kyle H

    Engine knock (newbie)

    I have a new (to me) 1998 gmc K1500 stepside with a 5.0l 305 Vortec. And I have an engine knock I have a small inclination about what it might be. Main or rod bearing. Push rod. Or idk but any help or possible other options that I dont know, are very much appreciated. Engine knock is light tap...
  4. Jgoodyear4

    305 Vortec to 335 stroker

    Has anyone here stroked a 305 (Vortec specifically), and what were the horsepower results? I have done the research and I understand I could swap into a 350 to make more power, and I am also considering that. However, I would be interested in doing a stroker on my 305 Vortec depending on the...
  5. Jgoodyear4

    97 305 vortec needs a little more power

    I have a low mileage 97 305 Vortec. It is a low mileage original engine and I intend to keep it in the truck however, it could use a little more power. I have read the argument about swapping to a 350 or an LS a million times and that is not what I am trying to do, I don’t necessarily want a...
  6. Awest623

    Might change up the heads

    I have an l31 with a chevrolet performance 14097395 (ht383) cam & 1.6 ratio rockers. I'll be dropping the 96-98 whipple onto it soon. Looking for a recommendation on heads (preferably aluminum & complete). I'll be honest, I don't know much about heads so any advice is appreciated. Edit: I would...
  7. I

    1996 GMC Yukon 5.7 4l60e 4x4 multiple misfires but no check engine light

    I have been trying to find the cause of some performance issues. Using Dashcommand I see that most of my cylinders are having a couple misfires on my drive to work but I am not getting a check engine light. On my drive to work I got 4 misfires on cylinder 1, 1 on cylinder 2, 1 on 3, 0 on 4, 2 on...
  8. Daniel Purcell

    4l80e to 4l60e vortec 5.7 in s10

    I put a vortec 5.7 and its computer out of a 96 chevy 3/4 ton 4x4 into my s10. Motor and computer used to be connected to a 4l80e. I swapped in a 4l60e out of a 96 chevy 1/2 ton 2wd. Wiring harness is from Howell EFI for my application. Reflashed the computer and no codes or errors. Motor runs...
  9. T

    Low oil pressure after rebuild

    2 years ago I bought a crate motor through summit racing it is a atk hp74 and it was running fine untill about 3 weeks ago when I was coming home from work and I lost oil pressure. I got it towed home and into the shop and checked the pressure with a mechanical gauge where I still had 0 pressure...
  10. F

    94 GMC K2500 with Fi-Tech EFI

    So my son bought his first vehicle, a 1994 GMC K2500 with 5.7 TBI. The engine is shot and he got a great deal on a lightly used 350 ZZ4 crate engine with Vortec heads. He's purchasing all kinds of parts for it inlcuding a Fi-Tech EFI, 30001. Of course this is his and my first build. We've...
  11. Aelfred-cyning

    262 VS 350: An obvious, difficult choice.

    Hi everybody, first post so good to meet y'all. I have a '95 C1500 W/T that I grew up with since I was an infant (we even have the same birthday). It's in decent shape for the year, at least for a Michigan saltmobile. I finally got myself a replacement frame so that I can start my restoration...
  12. nvess

    Longer Cranking on Startup

    My 1997 5.7 Vortec with 145k has always fired right up after less than a second of cranking. Now it will sometimes take up to three seconds of cranking before it starts. However, it only happens when the truck has been off for 1-6 hours. Fires right up in the morning or when I had just had it...

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