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Planned mods to stock 350 tbi.

Discussion in 'The Garage' started by 1990k5fan, Mar 18, 2007.

  1. 1990k5fan

    1990k5fan 1/2 ton status

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    So far I've mad the plans to add the folllowing to my stock engine.
    Headers ( Any recommendations? I think I'm going to try and save up for Thorley's or Hookers)
    Vortec Heads? (Good upgrade or should I look for other heads?)
    Edelbrock Performer Vortec Manifold
    Injector spacer
    Adjustable fuel pressure regulator
    High volume fuel pump

    Am I missing something? Should I drop something for something else?
    Also, I'm going to try and clean the fuel injectors soon. Will that give me a noticeable gain in performance?
     
  2. 4xcrazy

    4xcrazy 3/4 ton status

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  3. 1990k5fan

    1990k5fan 1/2 ton status

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    That helps? I had all the maintence done to the truck and it runs a lot better. :P So don't give me that one dude. I'm just making plans for the future :].
     
  4. 4xcrazy

    4xcrazy 3/4 ton status

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    :haha: you told me i guess :haha:
    just expressing how i feel alot here lately. [​IMG]
     
  5. 1990k5fan

    1990k5fan 1/2 ton status

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    Well any comment on my planned upgrades or no? In all seriousness.
     
  6. yoshisv

    yoshisv 1/2 ton status

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    I would also install a better cam to take advantage of the intake and exhaust mods.
     
  7. 1990k5fan

    1990k5fan 1/2 ton status

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    I've looked at cams and I've read on here that you have to be careful on the cam choice as there is a small window that you have to get in? I don't really know what I'm looking for so it is hard to look for cams at places like summit.

    Can you provide some cams that will give me some more power with a flowmaster 3" single exhuast , headers, and an intake?

    Right now I have 4:10 gears and 33" tires. I'm hoping to bump my 4" lift to 8" and run 36" irocs. If you need any other info just ask.

    Thanks, Dennis
     
  8. yoshisv

    yoshisv 1/2 ton status

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    I am running a comp cams 262 extreme anergy cam with 262/270 duration, 462/469 lift, and a rpm range of 1300 to 5600. it works fine with my tbi 355 with 10 to 1 compression, but some people do have issues with a cam with that much duration.
     
  9. 1990k5fan

    1990k5fan 1/2 ton status

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    Well my compression is stock with the 350 tbi.
    What cam would you suggest?
     
  10. yoshisv

    yoshisv 1/2 ton status

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    at or mt? either way a comp extreme fuel injection cam with 252/266 duration 477/472 lift should be suitable. rpm range is 1300 to 5300.
     
  11. yoshisv

    yoshisv 1/2 ton status

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    the best thing to do would be to call comp cams help line. they would give you the best reccomendation.
     
  12. 1990k5fan

    1990k5fan 1/2 ton status

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    Will do, I'll give them a call.
     
  13. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    My new engine is getting the comp cams XFI 8-464-8 cam. Granted this is a roller cam and will produce tons of low end torque but my lower end also has been changed from stock and the engine is also getting a set of AFR180 heads.
     
  14. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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  15. 1990k5fan

    1990k5fan 1/2 ton status

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    I have the new k&n air filter, and the tbi spacer. I'll look at getting the fuel pressure regulator and the air intake. Does the fuel pressure regulator allow you to boost the fuel psi? Also do you think I should swap the cam with a stock bottom end?
     
  16. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

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    You NEED the salad bowl, no question...
     
  17. NEK5

    NEK5 3/4 ton status Premium Member

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    x2.....
     
  18. Chrisblazzer89

    Chrisblazzer89 1/2 ton status

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    I think after all this you will also need to get ur tranny done. Just because you have a good engine doesn't mean you will go anywhere you will need to spend some cash on your tranny.
     
  19. 1990k5fan

    1990k5fan 1/2 ton status

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    Tranny was rebuilt like 5-10 thousand miles ago. I might need to get it serviced because those 5-10 thousand miles were over like 5 years.
     
  20. Thunder

    Thunder 3/4 ton status

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    If you go Vortec swap you will need a new chip burned. Also as said you need a new cam. Waste of money to put on vortecs and leave the stock cam.
    Call Comp cams and ask them to suggust a cam for your needs.
    If you want to build a high torque motor. I would just use your stock 193 heads. Do a valve job put in better springs and have them mildly ported. You will end up with a good set of heads that flow well up to 5K rpm. and build great torque. It will cost less than a vortec swap, More torque down low under 3800 rpm than vortecs. and get better gas milage. You wont have the top end power that vortecs have but how often do you run over 5K rpm?
    Top it off with a Comp Extreme energy XE 249 H cam and mabe some 1.6 to one roller tip rockers and Edelbrock performer TBI intake. With an adjustable FPR this combo can be run on the stock chip.
    Re: cleaning injectors. Pretty hard to clean them yourself. Either buy new flowmatched ones or send them to a injector service to have then sonicly cleaned and flow matched costs about $80.00
     

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