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NOS 5177 jet sizes

This is a discussion on NOS 5177 jet sizes within the Nitrous forums, part of the LSx Technical Help Section category; I've got a NOS 5115 dry kit off a Mustang I used to have that I am trying to convert ...

  1. #1
    vroomvroom BLUCAS's Avatar
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    00 Z28 & 84ish Mustang

    NOS 5177 jet sizes

    I've got a NOS 5115 dry kit off a Mustang I used to have that I am trying to convert to a NOS 5177 dry kit for my Camaro. I'm thinking the kits are pretty much the same except for the jetting.
    Can someone break down the jetting for 75hp, 100hp, 125hp and 150hp for the 5177 kit? Also I'd like to know if I need to use a shim along with the fuel jetting.

    I'm planning on running about a 75hp or 100hp shot on my stock LS1 A4 with some AR 94 plugs (Autolite racing plugs always worked best when I used to spray Mustangs). I'm planning on getting a window switch in the near future and maybe upgrading the fuel pump. Anything else I should worry about?
    Last edited by BLUCAS; 03-19-2008 at 10:11 PM. Reason: forgot sig

  2. #2
    Just another Joe Eagle's Avatar
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    5177 manual

    Jetting info begins on page 26 IIRC....

    What else to worry about - check timing. As long as you're on stock timing you should be fine w/the 100 shot. If you have a bunch of miles on the car, the fuel pump is a great insurance plan for another $100.

    HTH,
    -Eagle

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    Nitrous Tuner LS2Tuner's Avatar
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    Quote Originally Posted by BLUCAS View Post
    I've got a NOS 5115 dry kit off a Mustang I used to have that I am trying to convert to a NOS 5177 dry kit for my Camaro. I'm thinking the kits are pretty much the same except for the jetting.
    Can someone break down the jetting for 75hp, 100hp, 125hp and 150hp for the 5177 kit? Also I'd like to know if I need to use a shim along with the fuel jetting.

    I'm planning on running about a 75hp or 100hp shot on my stock LS1 A4 with some AR 94 plugs (Autolite racing plugs always worked best when I used to spray Mustangs). I'm planning on getting a window switch in the near future and maybe upgrading the fuel pump. Anything else I should worry about?
    Your good with what you have other than the fuel pump as Eagle said.
    I would gap your plugs @.038


    Quote Originally Posted by Eagle View Post
    5177 manual

    Jetting info begins on page 26 IIRC....

    What else to worry about - check timing. As long as you're on stock timing you should be fine w/the 100 shot. If you have a bunch of miles on the car, the fuel pump is a great insurance plan for another $100.

    HTH,
    -Eagle
    Good link for him!
    If you have a friend that has a scan tool plug that sum bitch in and go drive and see what the total timing @ to make sure no one has modified it in the past.
    I have has great luck with the Walbro pumps. No point in not getting the 255 you can always find some one running a sale for $99 on them.
    Try to get the the nozzle so it's spraying straight not directly into the side of the MAF or intake tube I see sooooo many making that mistake.



    And WELCOME TO THE SITE!!!
    Don't be afraid of the bottle!!! Be afraid of your tune!!!

  4. #4
    vroomvroom BLUCAS's Avatar
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    Thanks for the info guys.

    It looks the main difference between the kit I have and the 5177 is the 5177 has a T with two N20 supply lines and the kit I have only has the single feed line.
    Also the 5115 kit has T by the solenoids that sends small shot of N20 to the FPR to trick it into supplying more fuel, I'll have to remove that part for use w/the LS1.

    I'm kind of surprised the dry kits on these cars use the MAF for fuel enrichment. I remember trying to spray into the MAF on a 90 5.0 Mustang, it didn't read it correctly and A/F went to 17.5 by 4200rpm. I'll probably get a dynotune before trying to run this drykit on the Camaro, I don't want to do anything risky with a car this nice, that what beater 5.0's are for.

  5. #5
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    A 75 to 100 dry shot shouldnt hurt you any. I had a 5177 kit on my car and my A/F ratio was 12.8 on the bottle. Stock injectors are still good with the added 100hp.

  6. #6
    TunedbyFrost.com Tuner Frost's Avatar
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    Quote Originally Posted by 35thanniv.ss View Post
    A 75 to 100 dry shot shouldnt hurt you any. I had a 5177 kit on my car and my A/F ratio was 12.8 on the bottle. Stock injectors are still good with the added 100hp.
    12.8s good.... for off the bottle.

  7. #7
    Member Nitrous's Avatar
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    97 GMC with 02 LS6 engine

    Here's the numbers I got from NOS for my old 5177 kit I had in my 97 vortec 350. I ran a 150 shot with no issues. Here's what each jet will either have to be or drilled to to obtain higher hp numbers. These hole sizes are in thousandths per inch. I only posted this if you want to go higher than the manual. "Use at your own risk if you haven't used nitrous before".

    HP------Dual jets
    35------.020"
    50------.024"
    75------.028"
    100-----.032"
    125-----.038"
    150-----.044"
    175-----.052"
    200-----.047"
    250-----.055"

    N2O--Single Fuel if needed.
    50-----.020"
    75-----.022"
    100----.025"
    125----.029"
    150----.034"
    175----.038"
    200----.044"
    250----.050"

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