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Advise on supercharging my vt 5.0L 383 stroker

Discussion in 'V8 Development and Modification' started by Blu383, Aug 3, 2013.

  1. Blu383

    Blu383 New Member

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    Hey guys, I'm after a bit of advise on supercharging my 383 stroker, going someone has done it already and give me a bit of a heads up!
    The car is a vt 5.0L with come racing twin throttle's, come 383 stroker kit, yella terra roller rockers, lumpy hydrolic cam, heads worked to suit 560hp, 36lb injectors double row timing chain and the list goes on. I'm not 100% but I think the compression is 10:1
    It made 242rwkw on the dyno with 565nm

    Now the big question, I have bought a vortec v3 T-Trim charger kit and intercooler so I was wondering if there are and issues or tips on getting this fitted? Cheers
     
  2. mr j-man

    mr j-man New Member

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    first your going to need a blower cam...because you have a VT roller block id look into a solid roller cam.
    Your comp will need to be matched depending on how much boost you run.

    When you say your heads are worked to suit 560hp...wheres all this power gone when your only putting out 242kw at the wheels???
    Have you got 4 Bolt Mains or what?

    Your really going to have to re-design your top end and have it matched correctly by a professional engine builder mate....
    You cant just bolt it on and hope it works....I know I wouldn't, as its a lot of money to invest on something to have it turned pear shaped
     
  3. Deuce

    Deuce Super Stock

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    My thoughts:
    - Heads will be good as they are,
    - Injectors will be too small,
    - Cam will have too much duration (and possibly not enough lift),
    - Compression will be too high but you may need to change your head gasket for boosted applications anyway so may be able to relieve the chambers to suit (just an idea)
    - how strong has the bottom end been built?? as j-man said:

    talk to VS HSV MANTA on here as he is doing something similar.
     
  4. immortality

    immortality Home of the smoky breakfast Bacon! Staff Member

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    Compression may be fine, your using a centrifugal supercharger which doesn't produce any boost until the revs start to climb so the engine will cope with it a bit better.

    Definitely get a cam to suit, I would probably stay with a hydraulic roller, just have a look what the LS boys are doing with hydraulic roller cams, no need to go to a solid in many cases if you can get a decent hydraulic roller profile to suit. Been a roller cam you can probably re-use the roller lifters if they are in good condition. If you go solid you will need to get adjustable rockers as well.
     
  5. WogBoyz

    WogBoyz 435rkw/590rwhp

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    Compression shouldn't be too bad as on the 6l ve's its 10:4:1 and is safe up to 10 - 12psi
     
  6. Blu383

    Blu383 New Member

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    The cam I have is a hydrolic camtech camshaft
    230,233,578,578,110.
    And it has 2 bolt mains.
    Engine was built by the last owner so I'm going off the specs and receipts of the work done.

    I Apreciate the help guys, I know this is a big VERY expensive job so I don't wanna screw it up! Lol
     
  7. Blu383

    Blu383 New Member

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    Also, in regards to fuel system I was thinking along the lines of 80lb injectors, walbro 255lph internal fuel pump(already have) Bosch 044 external and a 2L surge tank?
    Is this ok, overkill or way off?
     
  8. immortality

    immortality Home of the smoky breakfast Bacon! Staff Member

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    That cam isn't really right for a blown engine, to much overlap, the same cam but with about 114°-116° LSA would be much better. Your best bet would be to contact Camtech and have a chat with them about it regarding the cam.

    80lbs injectors are probably overkill unless you want to run E85. I probably wouldn't run a high pressure internal pump but just a regular low pressure lift pump if your going to run a surge tank but a surge tank is a good idea.

    To work out what injectors you need have a look at an online calulator RC Fuel Injection

    60lbs injectors would be good for 600hp (flywheel)
     
  9. Blu383

    Blu383 New Member

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    Cheers mate thanks fOr that, I'll defInatly look into a new cam package to suit
     
  10. mr j-man

    mr j-man New Member

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    mate your comparing 2 completely different engines....not a wise suggestion!

    Id definitely want my CR in the 9's before I force extra air down its throat...unless you run E85
     
  11. WogBoyz

    WogBoyz 435rkw/590rwhp

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    Yes they are different however with that compression ratio he can run boost not massive amounts and with a good tune will be safe that's obviously making sure cam is compatible ect ect

    I was just stating the ratio is ok for lowish boost
     
  12. AirStrike

    AirStrike Administrator Staff Member

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    It's not as straight forward as saying it's fine with that boost because a VE does, heads are different material, different chamber design, cam specs are different, etc.
     
  13. mr j-man

    mr j-man New Member

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    who wants to run lowish boost??.....probably no one!
    If your going to boost it do it properly and run something that can take 15psi plus....and get that CR down as low as possible otherwise itll be a nightmare of all things to come.

    As airstrike and myself said its completely different regardless of comp ratio figures
    Basically comparing apples to oranges....

    Don't take it personally, no offence mate!
     
  14. WogBoyz

    WogBoyz 435rkw/590rwhp

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    "I want to run low boost" said no one ever haha

    All good mate learn something new every day I suspose, thanks airstrike for the info aswell
     
  15. Munz

    Munz Right Foot Action

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    Could use a mains stud girdle instead of 4 bolt mains
     
  16. Blu383

    Blu383 New Member

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    Looked at the girdles, are they worth it for this application? I know 4 bolt would be the way to go and as u may have guessed Ive spent a few $$$$ so far so I don't want to take the "easy" option if u know what I mean
     
  17. mr j-man

    mr j-man New Member

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    how fast do you plan on spinning this thing??
     
  18. Blu383

    Blu383 New Member

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    Supercharged and intercooled 383 stroker, should speak for its self! Lol
     
  19. Dan355

    Dan355 Go THE SS's

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    Not really!
    You could be one of those people who want a 600hp street daily car that will hardly see over 6000rpm and will be quite happy to do so. OR you could be someone who wants a highly strung drag/track car.
    Its all about the application its being used for.
    Changing from one to another is the most expensive way to go about it.
    If its the later then engine out strip the block, 4 bolt main conversion with some $$$ oiling mods + cam etc to keep it all together.
     
  20. mr j-man

    mr j-man New Member

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    6 grand transbrake launches from the local Traffic Lights. lol

    Ive got a 480hp 355 streeter and I find it hard to find roads where I can open it right up with out breaking traction.
    Its all well and good having a killer engine like we all want to have....ideally id love a 6/71 on mine but where could I drive it.

    you should start a build thread on this beast mate...id love to see pics and progress!!
     

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