$1000 '70 LS1/T56 swap

Discussion in 'High Tech Retrofits' started by spav350, Feb 25, 2012.

  1. spav350

    spav350 Veteran Member Lifetime Gold Member

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    I have a 125/125 with 550 lift in my car now and like the sound a performance of it. Youres sounds pretty close. This cam i have now is pretty lumpy. I've had to lock tite some hardware in the past because it vibrates so much.
     
  2. spav350

    spav350 Veteran Member Lifetime Gold Member

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    What size fuel line should I run with this LS? I have 6AN right now. Do I need to go up to 8? What kind of fuel pump should I look at also? I know I need a return regulator.
     
  3. 1971CamaroGuy

    1971CamaroGuy LS Swapped 1971 Camaro

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    I'm running 8AN into my stock lines from the pump to the regulator, then to stock 3/8 line...then 8 AN to the fuel rail up front

    6AN for the return line off of the regulator
     
  4. Aceshigh

    Aceshigh Veteran Member Lifetime Gold Member

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  5. spav350

    spav350 Veteran Member Lifetime Gold Member

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    Are you planning on upgrading the stock line to -8. You're only getting as much fuel as that -6 will allow to run through it. It's called friction loss. Turbulance causes flow to decrease as pressure is increased. No matter how much PSI you put through that -6, it'll only flow a set GPH. It has a pressure I'm sure that is ideal for max flow. I just don't know the formula off hand to determine it.


    Thanks Aces. That's what I needed to know. I didn't want to have to re-run all my fuel line. I bent all my own aluminum hardline, and didn't want to do it again.
     
  6. spav350

    spav350 Veteran Member Lifetime Gold Member

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    Is it safe to say I can use my stock fuel tank pickup I have without adding a baffle, so I can run an external fuel pump?
     
  7. JJFarmer

    JJFarmer Veteran Member

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    I'd try to get one of the Spectra EFI tanks for a 70-73 tanks, comes with the pump assembly. Rock Auto had them for ~$380 last time I looked. Wish they made it for my 76 swap, that was the most aggregating part of my swap.
     
  8. spav350

    spav350 Veteran Member Lifetime Gold Member

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    So when buying the tank... how would I elimenate the emmisions on the LS if i wanted a tank without emmision controls?
     
  9. Burt

    Burt Veteran Member

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    Spectra EFI tank

    I checked out Rock Auto but could not find the Spectra EFI tank referred to above.

    Maybe someone can help me find it.

    Thanks,

    Jim
     
  10. spav350

    spav350 Veteran Member Lifetime Gold Member

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    GM42AFI is the part number
     

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