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Fuel mod help for S/C swap.

Discussion in 'SVT Shelby GT500' started by weider1717, Aug 9, 2019.

  1. weider1717

    weider1717 Member Established Member

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    Before I get beat up I did already do my research on this and read several times that 17psi doesn't require fuel mods but is the limit. I am hearing different now so I am confused.

    I reached out to Lund racing who tuned my car with the stage two setup and I will quote their response:

    "PCM doesnt care about those items nor controls it so you are good but being at 17 psi we would need injectors and a BAP to support this with our tune .

    If any datalogging happens on a GT500 from 07-10 then it will need a nGauge and Wideband package for us to tune it .


    John Nardi"

    I am swapping to a VMP Gen 1 TVS with a 2.50" pulley. Of course I have the H/E for it and cai but still on stock plugs and from what I read I had planned on just changing plugs to the 471's gapped at .032 and change the blower and possible re-tune. So, if fuel mods are needed what do you suggest? I don't see me every going above what the stock rods will take as I am not wanting to build my engine if that helps. Also, if I ever wanted to go Whipple 2.9 but still stay at 700rwhp max what fuel mods incase I ever upgrade to that route. Thanks
     
    Last edited: Aug 9, 2019
  2. shelbygt500hoss

    shelbygt500hoss Member Established Member

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    Just some 56lb injectors and a VMP BAP. I make 17-18 PSI no issues at all
     
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  3. Kenneth

    Kenneth Active Member Established Member

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    ^^ This
    I'm at 18psi. with a Gen 2
    Fuel mods are 56lb. injectors and VMP plug and play boost-a-pump.

    Swapping to FIC 1000's in a couple weeks but only because i'm adding BPS NSR cams.
     
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  4. weider1717

    weider1717 Member Established Member

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    Thanks guys,

    That is looking like the best and cheapest option for this setup. Question is if I were to look into the future and want to be setup for say 750rwhp and a Whipple 2.9 would something like ID725's be a bit better? What would be a slight step up from the 56's and BAP I guess is the question.

    What I don't know is does the larger the injector mean worse mileage, I assume so..If thats true you may be right on the best option being 56s and BAP. Also, can you just put 56's without adding a BAP is it just for good security?
     
  5. Catmonkey

    Catmonkey I Void Warranties! Premium Member Established Member

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    ID 725s would give you more head room and only have to buy injectors once. But they are a lot more expensive than Ford OEM. As to gas mileage, it may not be as miserly as a smaller injector, but ID is know for pretty precise fuel metering.
     
    Last edited: Aug 10, 2019
  6. weider1717

    weider1717 Member Established Member

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    Right, holy hell! I checked the price after I posted that and I had rather not post that much into injectors..Looking like 56's and dual BAP's I like the 56's being a Ford part that was used on the 13-14 I'm sure they will do fine for me. Thanks guys
     
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  7. einehund

    einehund Well-Known Member Established Member

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    I'm running 20 psi on 56lbs injectors and VMP boost-a-pump on a Gen2r. Works just fine!
     
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  8. weider1717

    weider1717 Member Established Member

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    This along with old posts I have read leads me to believe I really don't need any fuel mods at 17psi boost. Lund says different and how can I question what a tuner like that says but I have read many at 17psi with no fuel mods maybe it is for a warm fuzzy..
     
  9. sleek98

    sleek98 Well-Known Member Established Member

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    It’s might be for some extra head room.

    I have always ran id1000. But once cry once. I have taken them to over 750 whp on e85 with my old setup

    However. For the safety I would do a bap and 56s since they are pretty cheap 500 used.
     
    Last edited: Aug 10, 2019
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  10. Mainn

    Mainn Member Established Member

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    Gen I VMP TVS, 2.50" pulley, JLT 123mm intake set up here. Stock fuel system - no injectors or BAP. Fuel pump duty cycle is up there, but no running lean. Can understand why Lund wouldn't want to risk it - but it can be done.
     
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  11. oneof185

    oneof185 Active Member Established Member

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    I basically have the same question, so thought maybe this would be an issue for OP too....maybe not, but I have a '11 with the 13/14 TVS, 2.4 and 10% IW OD.
    I was told by one tuner 56lb and a BAP would be fine or FIC1000 but then another tuner said I need a BAP with the FIC1000 and NGK TR6 gapped @ 0.28"

    I wanted to go the cheaper route but thought bap/56lb was about the same as the injectors but I've read kind of conflicting reviews on the FIC, so i'd prefer Ford 56lb and the BAP but I cannot seem to find 56lb, everything points to 52lb? Also the BAP I had thought I ran across the plug and play but then thought I read it didn't fit the GT500 and was for the GT?

    You have part #'s or where I can get the 56lb and the plug and play BAP?
     
  12. merkyworks

    merkyworks Well-Known Member Established Member

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  13. einehund

    einehund Well-Known Member Established Member

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    IIRC, the 56# injectors from Ford are listed as MU52. I thought it was weird when I bought mine, but was told they are the 56# ones by multiple different tuners.
     
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  14. oneof185

    oneof185 Active Member Established Member

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    Thanks guys.

    That is odd as that refers to 52’s and they say the 13/14 GT500 but like on American Muscle, they say they won’t fit the 2011.
     
  15. Nutty 5.0

    Nutty 5.0 Well-Known Member Established Member

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    Yeah it’s confusing when I was gathering parts for the same swap. Apparently it’s the different stock fuel pressures run between Coyote and 5.4/5.8: 52 vs 56#? Someone here should be able to confirm.

    But agree the MU52 is what you want. Pricing varies widely. These are pretty affordable:
    52 LB fuel injectors M-9593-MU52
     
  16. slo984now

    slo984now AKA 01yellerCobra Established Member

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    A lot of that depends on the tuner. I ran 80lb injectors in the past and still knocked down close to 20mpg on the freeway. I spent a lot of time dialing that in though.
     
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  17. decipha

    decipha Active Member Established Member

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    back in 2009 my sisters focus had a bad injector. Since 80s are the smallest I stock and I had a brand new set I swapped them in and she picked up 3 mpg's with nothing more than the injector data plugged in.
     
  18. oneof185

    oneof185 Active Member Established Member

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  19. Nutty 5.0

    Nutty 5.0 Well-Known Member Established Member

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    Guessing the VMP (VMP-ENF012) one from them is plug and play and the LMR (Item #VMP-AMPPNP
    MPN# AMPPNP)

    I'd give VMP or LMR a call. LMR may just sell the one that you need to wire in just to keep less inventory. Having a BAP from VMP with the PNP, It is two harnesses and maybe why the large jump in price.
     
  20. Catmonkey

    Catmonkey I Void Warranties! Premium Member Established Member

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    The mustang only has one fuel pump, so only one booster. You need the boosters for the GT500, which has two fuel pumps and two boosters.
     

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