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  1. Daveo91Burb

    383 Vortec/TBI Build Thread

    Update: The ATP Z-167 flex plate arrived yesterday. I think it's the right part. It's got the SBC crank bolt circle and it's got all six TC bolts at the 11.5 bolt circle - correct for 4L80e. 168 tooth, counterweighted, yep, think I should be in business. Both the Pioneer and ATP units are...
  2. Daveo91Burb

    383 Vortec/TBI Build Thread

    Yeah, he kind of admitted that - he said he usually does order the internal balance ones, but thought he could internal balance this one and save a few bucks (not sure if those were my $$ or his, probably his from the way things turned out). He messed around with it for a while and then decided...
  3. Daveo91Burb

    383 Vortec/TBI Build Thread

    Yep, that's a great site, tons of info there. Earlier in this thread I mention Old School EFI, Vancouver, WA - notice his logo at the top of the page. He's one of the main moderators/sponsers and has a lot of posts there. He's been great to work with so far, and I haven't even paid him for...
  4. Daveo91Burb

    383 Vortec/TBI Build Thread

    Thanks for the info, Mike B. So with the 1.6 rockers I'm at .44 for intake and .46 for exhaust. Sounds like I'll be very close - I'll be sure to check closely. I've also got a call into the rebuilder I bought the heads from to see what he says. Yeah, I've looked a lot at the HT383 cam...
  5. Daveo91Burb

    383 Vortec/TBI Build Thread

    Cool, this is awesome news, I read so many TBI horror stories of guys trying to get the tune right it's nice to hear someone say they're running great after some significant mods.
  6. Daveo91Burb

    383 Vortec/TBI Build Thread

    Not sure you can do that with this crank? Eagle sells both internal and external for 383 SBC applications. My first machinist actually started out with internal balance, but late in the game he told me I'd need a 400 balancer. Machinist I just hired didn't offer that as an option when I...
  7. Daveo91Burb

    383 Vortec/TBI Build Thread

    Update on the build: - brought the block to a new machinist (good reputation locally) last week but I'm gathering a bunch of new/different parts that he'll need to balance the rotating assembly. - bought keith black KB 135 pistons. 18cc dish. Found them on ebay, new but open box so a bit...
  8. Daveo91Burb

    383 Vortec/TBI Build Thread

    Great, thanks! And you're still running TBI with that? What'd you do for tuning it? Burn your own chip or have it done?
  9. Daveo91Burb

    383 Vortec/TBI Build Thread

    Cool, good to hear! What's the rest of the build like on that rig?
  10. Daveo91Burb

    383 Vortec/TBI Build Thread

    Thanks for the comments guys. Regarding cam, Yeah, this stuff is really tricky. I've looked at this a lot over the past year or even two, and I keep second guessing myself, but bottom line is the tuner I'm going to use (Old School EFI, Vancouver, WA) has told me point blank that the stock L31...
  11. Daveo91Burb

    383 Vortec/TBI Build Thread

    Yeah duration and lift look pretty good, but LSA is 116? Seems like that is a high number for 10:1 CR. Seem like there were a lot of iterations of that cam and lots of disagreement on specs on the 'net. Do you have the specs for the cam you actually have? I think the 383 will be cool when...
  12. Daveo91Burb

    383 Vortec/TBI Build Thread

    I'm using OEM 5.7 rods. My concern with the TBI is it's my understanding it doesn't do well with much overlap. But with the higher compression you really need a pretty good LSA or compression is really high at low speeds and you get detonation or retarded timing with the knock sensor. Stock...
  13. Daveo91Burb

    WTB: SBC 383/400 misc parts

    Looking for balancer and flexplate for externally balanced 383. Balancer - need externally balanced balancer, like what was used on a 400. 8 inch. Good condition, but nothing fancy. OEM quality is fine. Flexplate - 168 tooth, externally balanced. (Must have a counterweight) Nothing...
  14. Daveo91Burb

    383 Vortec/TBI Build Thread

    Progress on my 383 build has been less than stellar. I had a lot of problems with my machinist - he had the block for more than two months and I ended up taking it back before it was done. (Long story, but final straw was he texted me the night before I was supposed to pick it up for the final...
  15. Daveo91Burb

    Show me your electric fan conversion

    So for the Windstar conversion, what years of Windstars are we looking for? I just looked on CL and found a couple of different specimens I could pick up for around $300 (one had a bad tranny, the one other was an unspecified "non-working") My wife will generally be amenable to parting out a...
  16. Daveo91Burb

    Vortec Head Retrofit Question

    Going back to the plugs question.....x2 on this: The "L" in LTS is for LONG - very important. ("T" is for tapered). Vortec plugs require the longer threaded section. Plugs for older style sbc heads are too short. I didn't check the plugs you're using, they may be correct, but I just...
  17. Daveo91Burb

    Vortec Headed 350

    maybe a lobe or two on the cam went flat? What was your break-in procedure? What type of oil you running? Were the heads magnafluxed? Vortecs are great heads, but have a tendency to crack, especially around the middle cylinder exhaust seats. I have 062 vortecs on my 76 vette and I'm...
  18. Daveo91Burb

    New guy in Seattle, WA

    Welcome to a fellow Washingtonian! Love the unmolested 70s squares.
  19. Daveo91Burb

    Can a guy replace rear barn door glass at home?

    I got both of mine out without breaking them. But I didn't care a whip about anything but the glass - both doors ended up getting scrapped. And the only reason I saved them is I just didn't feel right about scrapping good defroster rear glass. They're just sitting in my shop if anyone wants...
  20. Daveo91Burb

    Add a Tach

    Love my GMSports tach! $200 is pricey but worth it IMHO. In the modern squares, you lose the fasten seat belts light (didn't care) and the brake light (moved it to the top of the cluster like where a glow plugs light would be for a diesel). https://www.youtube.com/edit?o=U&video_id=HsYCQnCD__8
  21. Daveo91Burb

    Dumb Question - TBI Distributor

    Thanks for helping me understand! Makes a lot more sense now. I was pretty sure it hinged on how the rotor interacted with the posts, just wasn't sure about the specifics - kept getting hung up on that part if it's too far one way it would fire the wrong cylinder. But the rotor only turns...
  22. Daveo91Burb

    TBI Distributor Recommendations for Roller Cam

    Finished my distributor rebuild! All seems well except there is more friction and noise as the rotor passes by one post than all the others. Should I be concerned?
  23. Daveo91Burb

    Dumb Question - TBI Distributor

    Thanks for the very detailed answer! And thanks for making me see that even in a non-EST dist the relative position between the rotor and cap posts is fixed and mechanical advance does not change it. I totally see that now. And I also see how mechanical advance does change the position...
  24. Daveo91Burb

    Dumb Question - TBI Distributor

    How does the advance work? I know it's determined and controlled by the ECM but HOW does the ECM control it? I mean the shaft and therefore the rotor are rigidly connected to the engine reciprocating assembly via the cam, so the relative position between the rotor and the distributor body/cap...
  25. Daveo91Burb

    fuel pump access panel TBI Suburban

    I'd say I hit the dims and placement of the hole pretty well! Thanks, all, for the help. Just have to do the actual replacement now. My system for mounting the panel back in is almost done too. I'll post pics in a day or two when that's done. Sent from my iPhone using Tapatalk

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