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LT4 peeps, what are you doing for fueling?

Discussion in 'Road Side Pub' started by Klaus, Mar 11, 2021.

  1. Klaus

    Klaus Premium Member Premium Member Established Member

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    I am thinking of a C7Z build and the fueling issues seems like a huge PIA. I would like to be >800whp and it seems like I am going to have to go to port at this power level. Below that it seems like I can get by with meth but that might even be pushing it. Anyone able to offer any advice?
     
  2. Machdup1

    Machdup1 Well-Known Member Premium Member Established Member

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    Fore Innovation for your fuel system upgrades. Let your tuner pick your injectors.

    Spray meth as a safety measure.

    Your tuner is smarter than me, so listen to him.
     
  3. MG0h3

    MG0h3 Well-Known Member Established Member

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    Thought you had a C6Z?


    Sent from my iPhone using svtperformance.com
     
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  4. BlckBox04

    BlckBox04 I am the liquor Premium Member Established Member

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    +1

    what’re you just going to start collecting z’s now?
     
  5. Klaus

    Klaus Premium Member Premium Member Established Member

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    I do have a c6z. I want more power but LS7 is not the best to supercharge. An auto c7z with a whipple would be interesting but the fuel system is a bitch. I have a line on a H/C C7Z that I may pick up if I can get it for the right price.
     
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  6. 7998

    7998 Don't Care Established Member Malt Liquor Mafia

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    From what I've read the hot set up is swap the head unit to a 2.65L. Less heat and more useable power.
     
  7. T.Man

    T.Man Well-Known Member Established Member

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    At the end of the day, the low side is going to be the least of your worries. There's a few different HPFP options, including an awesome mechanical/belt driven option. IMO, You're much better off staying straight DI or going port injection. I wouldn't mix the two unless it's piggybacking off of an OE strategy (LT5).

    Using meth for extra fueling is just asking for trouble.
     
  8. Klaus

    Klaus Premium Member Premium Member Established Member

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    Have an opinion on Kong or Maggie? It is tough for to tell if there is better, it seems like KB vs. whipple brand loyalty.
     
  9. Klaus

    Klaus Premium Member Premium Member Established Member

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    DI injectors are 2500 and I need a cam lobe which will be 4k installed. I think I need low side as well so $$$$$
     
  10. Klaus

    Klaus Premium Member Premium Member Established Member

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    From what I can tell, I should just bite the bullet and go port. It is a better option and cost will shake out the same.
     
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  11. Machdup1

    Machdup1 Well-Known Member Premium Member Established Member

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    $$$$$$ sounds about right.
     
  12. big reg

    big reg Gets his shit pushed in Established Member

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    My car should be done at RPM soon. With LT4 injectors and HPFP, a +32% fuel lobe cam and their Aux low side system, they think it will make 800 without meth on E. I’ll know by next week sometime. If the EPA is reading, I added 7 additional cats too.

    They make 1000+ all day with their Stage 5 kits. Fueling consists of the LT4 high side, their Aux low side and Meth. I chose not to use meth as I only drive 1500 miles a year so it would just sit in the tank and lines. Plus I didn’t want the tank in the cabin as my 11yr old son loves to drive with me on the weekends and the washer tank setup is prone to leaks.
     
    Last edited: Mar 12, 2021
    me32, gimmie11s and Klaus like this.

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