Removed Fuel Rail Covers - Car sounds awesome!

Discussion in 'Boss 302 and S197 Technical Forum' started by boro92, May 29, 2013.

  1. boro92

    boro92 TMO Race

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    For those who haven't tried, consider removing your fuel rail covers :) The car sounds wonderful since I've done it.
    I actually removed it because I thought it looked a bit cheap...it's not a true component of the motor, and just covers the intake runners and the rail/some coolant lines.

    I had no idea that Ford installed this for NVH! It really silences the car. Ever since owning this car, I always wondered why the engine was so quiet. The exhaust is wonderful, but the motor was always muted. Well, these covers are why! They quieted down the motor a ton! Without them, you definitely hear the roar of the motor. It becomes evident 3k rpm and above. Big difference in sound character. I used to get sound only out the back. Now it's from the front as well (approx 50/50 with 3/4 baffles in). Real nice.

    Pictured below is what I'm referencing. They're on both sides of the intake plenium, just over the fuel rail.

    [​IMG]
     
  2. gremlinsteve

    gremlinsteve TMO Addict

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    Try removing the two from under the instake as well
     
  3. boro92

    boro92 TMO Race

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    There's 2 under the intake?!
    I'm going to investigate that. Thanks for the tip :D
     
  4. texasmustang65

    texasmustang65 TMO Intermediate

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    the front cover under the intake is not hard to remove, but the rear you will have to remove the intake. Its not hard to do but just just keep that in mind before you start.
     
  5. ArizonaBOSS

    ArizonaBOSS Because racecar. Moderator

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    I think I will do that this week so I don't get freaked out by the noises later when it's full racetard
     
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  6. Swiesz

    Swiesz TMO Intermediate

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    Yup I took off the side ones too. Sounds great! Then I noticed two square ones between the fuel rails and a rubber hose running into the intake, are ther even more under neath the intake?
     
  7. Justin

    Justin Save the dawn for your dishes!!!

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    yes as previously stated above.
     
  8. ArizonaBOSS

    ArizonaBOSS Because racecar. Moderator

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    OK mine are now sitting on my workbench, along with the front under-intake foam.
     
  9. fun4me

    fun4me TMO Intermediate

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    Can someone post a pic of the enginebay w/ these removed?
     
  10. ArizonaBOSS

    ArizonaBOSS Because racecar. Moderator

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    302S:

    [​IMG]
     
  11. WinterSucks

    WinterSucks TMO Addict

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    Unrelated to the engine, but there are also two large black foam rubber/fiber sound dampers in the fenders. They get soaked every time the car gets wet and just sit inside the fender soaking wet. I have a feeling they will be a problem for anyone who drives a GT or Boss in the winter. You can remove them by opening the door and getting an arm in there, but it is really tight. They are not secured at all.
     
  12. neema

    neema TMO Race

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    have you tried mounting up a filter on a stick (aftermarket air intake)? The engine almost trumpets louder up front than it does out back. Add a tiger racing hood into the picture and it's even louder.
     
  13. leland302

    leland302 TMO Intermediate

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    Boro92: not to be stupid but what does NVH mean and how does change the sound of the motor? (Those "covers" are foam, right?)
     
  14. neema

    neema TMO Race

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    NVH = noise, vibration, harshness
     
  15. sadil

    sadil TMO Race

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    No question is stupid.

    NVH stands for Noise, Vibration, and Harshness.

    The PLASTIC covers reduce noise the engine transmits from the top of the heads. Furthermore, under the intake there are foam blocks which may be for noise reduction, but I do think they serve a higher purpose and attempt to keep the intake cool. There was discussion regarding these in another thread and as of right now, I dont think I am going to remove anything. The last thing I want is to remove something that creates noise I dont want to hear.

    The car right now is stupid loud with my ARH longtubes, ARH off-road X-Pipe which feeds into stock side pipes with plates removed, JPC over-axle pipes, and Borla 13' GT500 S-Type mufflers. Sounds like a late 60's muscle car on light throttle, a battalion of tanks firing at anything above 3K rpm, and the gates of hell opening at anything above 5k. On downshifts it sounds like an F1 car. I might try the covers on the heads but dont think I am going to remove those foam blocks unless I can get some heat reflective materials cleanly around that area.
     
  16. neema

    neema TMO Race

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    You can't be that descriptive and not include some sort of video clip!
     
  17. CPTMac689

    CPTMac689 Shawn

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    I had been considering this for awhile. 2 inch thick foam insulation on an engine that runs pretty darn hot can't be too good for it. So, you motivated me. I can't see any difference on my air intake or cylinder head temps via the Track App but it will say that NOW it sounds like it should have from the factory. Race Car!!! ;D

    Now, if I can just figure out how the guy in this link made his custom covers...

    http://www.mustangevolution.com/forum/f358/t305313/
     
  18. Roadhouse

    Roadhouse Logan

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    Looks like he just cut up a stock 5.0 intake cover...
     
  19. Justin

    Justin Save the dawn for your dishes!!!

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    hmm I don't care for that look but have to see it in person to be sure
     
  20. ArizonaBOSS

    ArizonaBOSS Because racecar. Moderator

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    I can't really hear a change over the exhaust.
     

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