vortec

  1. Aidan Kesler

    Top end build worth it?

    first and foremost I’m not a tbi guy lol I ditched my tbi for an old school carb swap for my own personal preferences! Yes I used a 4l60e carb TPS sensor mounting setup for the trans, but that’s besides the point!! Anyways lol I’m sorta new to building motors so I need some insight. I’m...
  2. VictoryRed

    Cams

    going to be buying an aftermarket cam currently planning on getting one with these specs: Duration at .050 in. 215/223, Lift .473/.473, as well as upgraded springs My main concerns are tunability of the stock black box and having enough vacuum to use my brakes without doing hydroboost. You...
  3. 2doortahoetoby

    Engine Rebuild Torque Specs

    I have been searching across the internet trying to find torque specs on all the motor internals. I have a spare motor completely stripped to the block and I am installing all new parts. I have been finding a mix of numbers on the internet for torque specs, and can't seem to find reoccurring...
  4. N

    99 Tahoe 5.7 died on the way to work, crank no start, P0307, replaced crank sensor, no fix. Plz help.

    Hey all, I bought this 99 chevy tahoe in July, and had replaced a couple things since then. It has 224k on it, and it ran just fine before, with no real issues. Ive replaced the: Catalytic converters belt tensioner idler pulley Distributor cap and the battery since I had bought it. But the...
  5. 2doortahoetoby

    Best 5.7 Vortec Long Tubes

    I’m sure this has been discussed before, but I see a lot of back and forth of arguing with header recommendations on the threads, LOL. Looking to purchase a set of long tube headers for my 5.7 vortec. I will be doing an EGR delete to broaden my choices for long tubes. Obviously I can’t narrow...
    • 2doortahoetoby
    • Thread
    • exhaust headers long tube headers long tubes vortec
    • Replies: 6
    • Forum: Exhaust
  6. O

    Vortec heads on stock TBI 350

    Hi. I’m new to the forum and had some questions about my 1992 Chevrolet Cheyenne. It recently had a set of 906 vortec heads installed on an otherwise completely stock tbi 350, now it’s not running all that well. When accelerating hard it chokes and wants to stall. Sometime backfires. It also...
  7. S

    Best Vortec head spark plugs for reliability and performance?

    Hi everyone I’m curious what spark plugs I should put in my 350 when I install my vortex heads, I heard AC delco are the best. What would you recommend? Headed to advance auto tonight
  8. S

    Thread size on TBI water pump?

    Anyone know the thread size on this plug in my water pump? I need to get a Vortec coolant bypass in order using this plug hole, I assume I can do that
  9. S

    Good hydraulic flat tappet spring kit for Vortec heads and questions

    Hi everyone I’ve been looking at the comp cams beehive springs, I understand they are duel spring, for running a 450 or lower cam should I remove a spring? I also want springs I can use for not only my peanut cam, but my other cam that I want to put in that has 470 of lift or if I just...
  10. S

    Z28 springs on Vortec heads

    Hi everyone I bought a pair of vortecs https://www.jegs.com/i/JEGS/555/514080/10002/-1 Linked here^ I’m pretty sure the springs on these heads are for a roller cam which I don’t have. I have a set of Z28 springs made by a company called engine tech, got them for 60 bucks on eBay. I am...
  11. T

    1996 k2500 low on power

    1996 k2500 5.7 fuel pressure is 60psi with key on engine off when it is idleing it drops down to 50psi and after i turn it off it will drop to 0psi. reason i checked fuel pressure is truck is low on power all across the rev range. is there anyway to tell if it is fuel injectors vs fuel regulator...
  12. chris2323

    Increasing Fuel Pressure on Spider Injectors

    Does anyone have any experience increasing fuel pressure on the spider injectors? Its my understanding that there is a torx adjustment screw on the fuel pressure regulator. Some people have said they were able to increase pressure up to 70psi. Currently seeing over 100% injector duty cycle at...
  13. B

    5.7 vortec or 5.3LS?

    Ok so the debate that I’m currently having with myself is this. I bought a truck that I am going to be tearing down and doing a full restoration to fix the Canadian salt road damage. I’m building the truck as a work truck. C1500 ext cab. So towing/hauling once in a while and payload. Already...
  14. S

    Best setup for low-midrange torque on a stock 2 bolt main L05 88 350, with stock trans and converter?

    Hi everyone, after getting a much better job in the HVAC field I will have much more money to throw around, I’m no longer trying to build an engine with the least money possible. I originally wanted to use Vortec heads on my block but it sounds like afr enforcers are a straight upgrade My...
  15. S

    Facebook scam?

    Saw a pair of “new” Vortec heads. The seller claims a 168 cc chamber and 180 CC intake runner. Is this a scam? Are those numbers good? I know most Vortec heads are 164 CC. He also claims these heads can handle something like 575 of lift curios if I should drive out and buy these since every...
  16. ralmo94

    L29 timing gear

    Does anyone run an adjustable timing set with the stock crank sensor and timing cover? I've read a lot of threads were guys had one and when putting the cover back on it won't spin. I know a double roller is out. I'm sure anything from rock auto would fit, but no adjustable sets I've seen...
  17. S

    Summit or JEGS Vortec heads?

    Hi everyone, so the heads I wanted to initially get for my truck were the summit heads (linked here) https://www.summitracing.com/parts/sum-151124 These heads are out of stock and I’ve had them ordered since May!, it’s estimated they’ll ship in November and I don’t plan on waiting that long...
  18. N

    98 5.7 Vortec Rough Idle and stumbles after running down the road for 20 mins

    Hey everyone I have a 98 Chevy C2500 with the automatic transmission and my truck starts up perfectly fine and runs fine but as soon as I drive it for I'd say about 20 mins easy it decides to idle rough and shake the cab at 550 rpm and if I push the gas it struggles then runs perfectly fine...
  19. S

    Good ready to install vortec heads?+cam recommendation

    Hey everyone, the summit 151124 vortec heads I originally wanted have been out of stock for some time now, says they’ll be back in stock in august and I don’t plan on waiting that long to do my head and intake swap. Does anyone have any recommendations for ready to bolt on vortec heads already...
  20. jrmush3

    97 k2500, 5.7 vortec no crank no start

    Hello, my 97 GMC K2500 with the 5.7 vortec died when i was backing into the yard. Now it wont crank most of the time and when it does it cranks very slowly for a second or two. Any tips on diag?
  21. W

    L29 VIN J 7.4L Vortec (fuel rail, 8-injectors, FPR & wiring harness TSB maybe?

    I've been told there was very likely a TSB for an assembly that consisted of the title mentioned components. I haven't been able to accomplish a find using typical searches. I actually have one and I've some interest.
  22. Raspi454

    99 350 vortec rough idle

    I'm not any good at diagnosis, but my 350 vortec doesn't idle nicely, cold or warm. It kinda pulses(?) or it seems like it has a cam in a way, If that makes sense. Going down the road if seems to do alright, but as soon as it idles it's not nice. What do you fellas think? IAC, tune up, something...
  23. Hoosierlong90

    350 vortec swap

    Hey yall, Just purchased a new dressed 350 96-2000 vortec. I am putting it in a 94 K1500 that originally has 350 tbi. I want to keep the tbi and make this as simple as I can keeping all the gauges and 4l60 working. Vortec fuel pump has already been installed. I know I can either keep the carb...
  24. Jacob Hendrix

    '97 5.7 Vortec Low Oil Pressure

    In my '97 C1500 Silverado, I'm getting the check gauges light and low oil pressure. I had thought at first that it was the actual gauge cluster since those tend to jump around anyway, but after driving for a week or 2, I started noticing a slight clacking noise. To me, it sounds like something...
  25. KaidenP2

    4.3TBI to 5.7 Vortec

    Hi guys, I know this has been discussed a few times but here’s my scenario and findings: I have a tbi 4.3 in my truck (truck is a 95 c1500) . I had the opportunity to buy a vortec 350 which came with the computer and transmission. Anyway I’m aware I need to swap all of the wiring to do the swap...

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