Roush vs Injen Evolution CAI

Discussion in 'V8 5.0L Engine / Mods: Bolt-ons, Exhaust, Tuning' started by ghostang, Oct 20, 2019.

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Roush or Injen Evolution CAI

  1. Roush CAI

    25.0%
  2. Injen Evolution CAI

    8.3%
  3. Other

    66.7%
  1. ghostang

    ghostang Member

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    I'm looking at adding a cold air intake to my 2018 Mustang GT. I prefer to add a closed filter box vs an open filter box to avoid high intake air temperatures. Anyone have any real world experience with the Roush or Injen Evolution CAI?
     
  2. Bluemustang

    Bluemustang Well-Known Member

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    JLT gets my vote.
     
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    ghostang

    ghostang Member

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    Thanks Bluemustang. I looked at the JLT, but I was looking for a closed filter box CAI to keep the IAT down on idle. Do you have any heat soak issues with the JLT at idle?
     
  4. Bluemustang

    Bluemustang Well-Known Member

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    Not really now - after putting in the Velossa tech ram air inlet. Less than the Roush 18 CAI I can tell you that for damn certain. Not even close in that regard, the IAT w/the Roush intake is very high idling. It drops very fast though, as do many of the others once you start moving. The only thing I can think is when the Roush box does heat up, there's really no place for it to go. The Velossa tech piece made a huge difference though in the IAT. And the flow at least on my 15 car was not close, the JLT wins.
     
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    ghostang

    ghostang Member

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    Thanks for sharing your experience! I hadn't thought about adding a Velossa tech ram air inlet.
     
  6. Myshelby3425

    Myshelby3425 Well-Known Member

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    i had the velossatech with my JLT. It did nothing to help IATs at idle. Velossatech only helps when up to speed. JLT IATs for me were in the 140-160 at idle in the summer. Swapped to the Steeda box and I barely hit 100.
     
  7. Bluemustang

    Bluemustang Well-Known Member

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    Just curious, yours is a 15-17 or 18-19 car?
     
  8. SAY WHAT

    SAY WHAT Well-Known Member

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    #8 SAY WHAT, Oct 24, 2019
    Last edited: Oct 24, 2019
    Where do you live? Me and blue mustang live in the same area, we have done multiple tests and comparisons with the jlt and roush cold air with closed lid. The Roush is only slightly better if not the same as the jlt at idle temps, any car will heat soak to 160+ if you let it idle long enough. You are trading a lot of flow for the closed lid box. We both have the velossatech installed on our cars. I would take blue mustangs experience to heart hes been through 3 cold air intakes for the sake of testing.
     
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  9. EFI

    EFI Well-Known Member

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    The stock intake fits your requirements to the T and flows just as well as any aftermarket intake.
     
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  10. TRPCANA

    TRPCANA Well-Known Member

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    It has been proven several times over that on NA applications "cai" is a waste of time and money. Lethal Performance did testing with their 2018 A10 car project goldmember and proved all gains are in the tune actually. From E85 and tune they put down 459rwhp, then added the JLT and retuned and picked up 2rwhp. Both Lund and PBD also recommend keeping the stock box for NA applications as well. Another note to add if you want the Flex tune, steeda's sealed box design is not compatible with the tune, they claim the car will run but it has erratic idle and rpm issues due to MAF placement, plenty of posts on it if you want to search. I personally ran the steeda and had quality control problems with the box and returned it, i was not the only one. JLT and PMAS pick up next to nothing on a dyno and add high IAT's, and true the number one counter argument is that at speed the IATs drop however 150+ degree IATs in a staging lane or at the start of a dig cant be good for max timing on a launch IMO. And lastly, velossatech is mostly snake oil, no one on here can reliably prove that they picked up anything and ive been watching this part for over a year. Several tuners ive spoken with actually mention that velossa decreases performance slightly because it disrupts the flow of air to the filter by changing the tunnel design that ford specifically put in place. There is some data that it does reduce IAT slightly due to not taking in hot air from the radiator but stock box IATs are low enough where its not worth the price tag IMO. Good luck but id do some more research into the truth behind the "cai". Now if you have a blower or plan to get one then there is some gains to be had with an open element filter, obvious reasons of course.
     
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