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  1. S

    Rebuild or Replace?

    you can test your radiator with an infrared heat gun. That will give you an indication of heat transfer.
  2. S

    Rebuild or Replace?

    Don't know what part of AZ you are in. However, having built quite a few of these TBI's engines there are quite a few things to do. First find a shop that can bore/hone with deck plates(yes it needs to be done with plates) square deck the block. Deck to 9.005". Align hone the mains. Deburr the...
  3. S

    Would you ditch this truck, do engine swap, or swap the head gasket?

    simple green doesn't work well with heavy grease and oil.
  4. S

    Would you ditch this truck, do engine swap, or swap the head gasket?

    Purple power cleaner works very well. Don't mix it too strong, Use hot water and a mild mixture of purple power, and fill the hoses with the mixture. let it sit for a few minutes and then with both hoses open to the atmosphere, take your blowgun and blow the mixture through the core. You may...
  5. S

    experienced advice requested for overhaul

    I have done a fair amount of vortecs and researched quite a bit on what to use and not. 109 LC cam would work in a 305 because of the small bore. In a vortec setting 350 it may work only because of the low duration at .050. I have used a 208/216 @.050, ground on a 112 LC. in a 350 you will need...
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    Would you ditch this truck, do engine swap, or swap the head gasket?

    Did you check to see if the intake gaskets are leaking. They are very well known to do that. If that isn't the case, remove the heads, have a competent machine shop mag the heads, and surface the heads. Yes surface the heads if they are not cracked. Ask if the machine shop uses a CBN cutter on...
  7. S

    Curb weight of ext cab 4X4 5.7 vortec truck?

    We used to keep track of weights of vehicles for testing we did our g- tech. If my memory serves me tonight, the weight of a extended cab, 4 wd, half ton silverado was 5260 on a commercial set of scales.
  8. S

    Vortec vs TBI - Stupid Questions, need answers please :)

    With that many vehicles in your garage, don't you have some friends that would help or you help them do the engine change?
  9. S

    AC Question

    have you tested the fan clutch? If you aren't pulling air through the condenser it can not cool. Seeing as you stated going down the road it's cool. That tells me you are forcing air through the condenser. Put a fan in front of the condenser at idle and see if the pressures change and the temp...
  10. S

    rough idle, p0300 after FPR replacement 96 5.0 vortec

    Chevy in My Blood, if you are going to work on vehicles especially computer vehicles, get at least the basic tools to diagnose. Guessing without testing is just a parts changer, and I'm sure you don't want that. Besides a fuel pressure gauge even at HF is only $19.00. If that breaks you or...
  11. S

    OHM testing specs for sensors

    You can also use a voltmeter, ohm meter will lie to you.
  12. S

    Exhaust help

    Nate, seeing your in AZ, and a dry climate you must have a muffler shop that can make the exhaust for you. You don't really need polished stainless unless you just want it. Stainless also cracks. In Az we use to use the aluminized version and never had a problem. If you go with a universal...
  13. S

    Using oil

    Tanner, Your low oil pressure could be too much clearance on the mains and rod bearings. Mains mostly. Also if the engine is dirty inside(sludge, carbon deposits) that will also lower oil pressure especially at the oil screen. If you drop the pan, usually the most clearance will be at #1 main...
  14. S

    Cylinder head question

    In order of cyl heads, Dart has 180 CC head that would work well. The price of Darts are not going to be in the price range of old designed refurbished heads. What intake are you using? If you are using the stock TBI manifold it has a 20% restriction over the open head on a flow bench. The...
  15. S

    '91 5.7l TBI random interval misfire

    Maldred, You said the engine was remanufactured in 2015. Did you happen to check the teeth on the distributor gear? With a good amount of were on the teeth, can cause a misfire. You also stated that when it misfires the voltmeter drops. I would test and inspect all the connections to the...
  16. S

    Crazy wiring problem

    What is the output of the Alternator at the rpm that you are turning the corner? It could be the alternator isn't producing many amps at that RPM. Also in a turn, the P/S is loading the engine thus slowing the engine down, and reducing voltage. You wouldn't be running the heater when making...
  17. S

    Ecm help

    John, Kenny is correct unless someone has changed your trans. The trans for that truck is a 700R4. It should have a kickdown cable going to the TBI unit. 400's do not, they are electric. If you install the 350, most of the sensors should be the same. If in doubt remove the sensors from the 305...
  18. S

    305 to 350 vortec on 98 ecsb

    The atomizers are the same for 305/350 on vortec L31's. If $$$$ allow they make a actual injector harness assembly with real injectors to replace the factory atomizers. I believe the assembly can be ordered from amazon, or Rock auto. I believe standard igniton parts is the manufacturer.
  19. S

    Trim between bumper and grille

    If you have a Certafit auto body parts warehouse in your area see if they offer the pieces you need. Make sure you test fit the parts before painting and completely installing. Most of the aftermarket parts come from China, so test fit first. I also have good luck, with up pull it junk yards...
  20. S

    Help with 350 TBI timing advance

    Wayne, a vacuum gauge should of showed you a clogged cat. A vacuum gauge can show you quite a bit of information in diagnosing a problem.
  21. S

    Help with 350 TBI timing advance

    I had a customers vehicle recently doing the same thing. Finally found and I don't know your case but, someone had removed the harness from the retainer by the distributor. After tightening the connector pins to the module, put the harness in the retainer and the vehicle ran and idled like it...
  22. S

    Help with 350 TBI timing advance

  23. S

    Spider Injectors + Headers Questions

    I don't know if the 87-95 headers fit the 97 truck. I used Hookers for my 98 and they fit great. I was informed the frame on a 96 and up to 99 is different from a 87/95 and there is a separate part number for the later truck. As for the egr. You will have to either eliminate the tube and GM has...
  24. S

    Crate engine

    I located a crate engine from www.chevroletperformanceparts.com and they have free shipping. I believe they are in GA. However free shipping will save you over $200 freight. I believe summit charges truck freight. As for my customer they saved over $700 from buying the same 350/290HP engine from...
  25. S

    Fuel economy issues!?

    Just a thought, do you have access to a 4 or 5 gas analyzer? With the sniffer in the pipe the results may point you in a direction. Also what is the fuel pressure? Have you pinched off the the return line to see if there is an internal leak in the fuel system. You said the plugs look a tad rich...

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