Can I get your dyno #'s with intake/tune/exhaust on 93 octane for 2018+

Discussion in 'V8 5.0L Engine / Mods: Bolt-ons, Exhaust, Tuning' started by Animal, Feb 4, 2019.

  1. Animal

    Animal Member

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    Hey everyone. I recently got a 2018 GT PP1 M6, coming from a 2014 GT PP with intake/ 93 tune/ exhaust. I live in Kansas City, Missouri, so even 93 octane isn't very common at the gas pumps. Most gas stations have 91. There's a few places around town that offer E85, but it's a pain to go out of the way to get it.

    What are typical dyno numbers people are getting with those simple bolt on's? I haven't gotten my hands on an intake or tuner yet, the last tuner I had was an SCT and even then the tune that came with it wasn't great and I went to a local shop to correct it.

    The car came with an h-pipe, but i planned on getting an intake/tuner combo and a catback. Sorry if this has been discussed a ton. I heard mid 400's to the wheels are common with around 400 ft lb tq.
     
  2. MX Raptor

    MX Raptor Active Member

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    Most of the 18+ years are dynoing between 410-420whp stock. Of course this is dyno type dependent. Personally I wouldn't even waste the money on a cat back exhaust, the stock unit flows pretty well, your bottle neck are the headers, and you already have an H-pipe so that restriction has been lowered in that area. With just an intake, and H-pipe with a reputable tune I would say around 435whp on 93 octane, and on quality E85 maybe 470ish. With cat less LT's you'll be looking at around 450whp on 93 and close to, if now just over 500whp on E85.
     
  3. Type550

    Type550 Well-Known Member

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    The 18+ GT's are 460 HP at the crank in stock form, which should be approx 391 WHP if you take into consideration a 15% drivetrain loss. Even with a 12% drivetrain loss it should be around 404WHP stock.

    With headers, exhaust, CAI and tune on pump gas I reckon you'll be at around ~490 crank HP or ~416 WHP.

    Again, depends what dyno. Some read higher than others.
     
  4. AZ18yote

    AZ18yote Well-Known Member

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    Stock intake but with ARH catted LTH and flex tune (though AZ does not have real e85 only flex fuel which is rated around e54) she made 471 / 424 at the wheels on the last dyno day.

    Stock on 91 (AZ also does not have 93) if I recall was about 424 / 403. These high compression 18+ engines respond well to tune and fuel.
     
  5. 3.14LOT

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    IMG_3718.PNG

    Stock and after ARH headers long system with Roush axle-back. I'm getting a CIA soon so I'll post that when I get it.
     
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  6. OP
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    Animal

    Animal Member

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    Thanks for the reply's so far. Longtubes seems like a legit mod for sure.
     
  7. bootlegger

    bootlegger Enginerd

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    You are in the midwest. E85 and a tune will net you the easiest and cheapest gains. I remember E85 being fairly easy to find in KS/MO.
     
  8. Idaho2018GTPremium

    Idaho2018GTPremium Well-Known Member

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    43 rwhp gain with full exhaust system only? Nice. Did that include a tune? Does your system have cats?
     
  9. bootlegger

    bootlegger Enginerd

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    He said he had headers and an axle back. You usually have to run a tune if you change headers. Those gains are what I would expect with headers and a tune. I really want catted headers, but I don't think I could run them without a tune. Never know when I may have to tune back to stock in order to get warranty work done.
     
  10. Idaho2018GTPremium

    Idaho2018GTPremium Well-Known Member

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    He said he has the ARH "long" system, which is LT headers and new piping back to the axle. Then he replaced the axle back with with a Roush axle back system. So, it is a full exhaust replacement. He also said that was the only thing done - didn't mention a tune which is why I was asking (and about the cats).
     
  11. 3.14LOT

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    Yeah on 93, Steven Fereday at LMR In Houston tunes it. No cats, off road headers 1 7/8, stock tires. I’m going back in two weeks to tune it with the CIA and 325s on the back so we’ll see where it’s at.
     
  12. Jetnoise

    Jetnoise Well-Known Member

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    Do you have the torque curve to share?
     
  13. Turbolag87

    Turbolag87 Well-Known Member

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    u might lose power due to the bigger tires :)
     
  14. 3.14LOT

    3.14LOT Member

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    I don’t
     
  15. 3.14LOT

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    Update :sunglasses: 480rwhp 438tq (SAE)

    E85, JLT CIA, long tube, 325 rears (about 1.5 lbs heavier than stock each tire/wheel) upload_2019-2-23_12-54-48.png
     
  16. OP
    OP
    Animal

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    Awesome numbers!
     
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  17. bootlegger

    bootlegger Enginerd

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    Why did they stop at 7000rpm? Looks like it was still climbing.
     
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  18. drive_55_not

    drive_55_not Well-Known Member

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    Peak power is around 7k, We did three dyno pulls on mine and the 3 averaged peak power was 422rwhp/390rwtq @6940 only mod was a PBD 93 tune.

    I have added MBRP O/R LT's and a Flowmaster Outlaw 3" exhaust since ... I haven't dyno'd it but butt dyno sez low end torque is much improved..

    Hopefully this crazy wet weather we've had this winter will move so I can switch to a PBD E85 tune in a couple weeks ..

    .
     
  19. bootlegger

    bootlegger Enginerd

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    Hard to tell unless you pull past 7000rpm. Some cars in the dyno thread were making peak hp closer to 7100. I mean the difference may be minimal, but I would prefer to have my pull go past the peak to around redline.
     
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  20. 3.14LOT

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    Yeah I’d agree, I wasn’t doing the tune so I can’t speak on that.
     
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