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Northstar Engines and System Technical Discussion Discussion, How to install Nitrous the correct way! I need input in Cadillac Engine Technical Discussion; Cool well from one nitrous user (though on a bit more common platform!) to another, I wish you all the ...
  1. #31
    NHRATA01 is offline Cadillac Owners Fanatic
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    Re: How to install Nitrous the correct way! I need input

    Cool well from one nitrous user (though on a bit more common platform!) to another, I wish you all the best! But trust me, it is a cheaper route, if it is done correctly, than going with any kind of forced induction setup. The MAF plate setup is nice and I think you'll like it.

    Anyways hate to add another nickel and dime to your project though, but since you mentioned getting some slips with the spray on the car, you'll also need a blowdown tube for each bottle that exits outside the vehicle - tracks are pretty strict about looking for this during tech inspection. Since it's painful to drill holes in your baby, and even moreso when it's a Caddy, what you may be able to do is run some braided steel line from each bottle to a T, and then drill and mount a bulkhead somewhere down in the spare tire well that vents outside. Should be a little bit neater than drilling a pair of holes in the trunk floor for the tubes.

  2. #32
    Highline Cady's Avatar
    Highline Cady is offline Cadillac Owners Fanatic
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    Re: How to install Nitrous the correct way! I need input

    Oh damn, forgot all about that. I'm sure I can sneak it by once or twice (I go to the track allot, they never even pop the hood) but the right way will be to vent it. I only have 1 bottle in the car at a time, the other is an extra, that way I won't be getting the shop all the time getting them filled.

    Only 8 passes out of a 10 pound bottle though? Guess I'll find out soon. Hey what's a good price per pound anyway? I'm a bit of a Nitrous virgin you could say. Once again I appreciate all the info.

  3. #33
    NHRATA01 is offline Cadillac Owners Fanatic
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    Re: How to install Nitrous the correct way! I need input

    Ah my mistake, I thought you had two bottles connected and teed in the car. Well, how much you use depends on the shot size. A 100hp shot uses about a pound per 1/4 mile pass I've found, so by about 8 passes the liquid level has dropped low enough that the bottle pressure won't keep up with the flow when the spray is activated, and you get some surging. A heater will help you get more out, because the bottle pressure will drop faster if it is not heated, and the bottle itself will chill when you are spraying. Warm it back up, and you can restore the bottle pressure quicker. And an FYI, a 300 watt heater will drain the battery in about 10 minutes if you leave it on...that's experience talking.

    As for price, well if you find a good speed shop, you may be able to get it for around $3.50/lb. If you're unlucky or live in NY, or both, well I pay $5.50/lb when I fill. At least I did last year. Haven't made it out yet this year so I hope they didn't raise the prices. I used to drive 1 hour to CT to buy it for $3.50, but it's not worth the gas cost now at $4/gallon!

  4. #34
    Highline Cady's Avatar
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    Re: How to install Nitrous the correct way! I need input

    Thanks, I thought $6 bucks a pound was a little steep. I'll have to look around more and find a better deal somewhere else. I'll chalk it up to a learning experience, but will never pay that again. Thanks for the info, how much is a bottle heater, I'll look them up later, just curious on your input.

    By the way this is in WI, it should be cheaper here, don't you think?

  5. #35
    AJxtcman's Avatar
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    Re: How to install Nitrous the correct way! I need input

    Can anyone see a simpler way to do this? One less relay
    I want it to engage at WOT, 2nd and 3rd gears, and EGT under 850° c


  6. #36
    Highline Cady's Avatar
    Highline Cady is offline Cadillac Owners Fanatic
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    Re: How to install Nitrous the correct way! I need input

    I'm out, suppose you already knew that. LOL

  7. #37
    NHRATA01 is offline Cadillac Owners Fanatic
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    Re: How to install Nitrous the correct way! I need input

    Yes, buy a programmable nitrous controller that will act as the window and WOT switch, and has the option of offering 1st gear lockout. It will look for the tach to make 1 sweep to a certain rpm range before it will engage the nitrous. Then you don't have to monkey around with the second relay and wiring into the shift solenoid. Plus it will provide a window switch, which it looks like you don't have, and really should. Then just wire your EGT relay in series somewhere on the low current side.

    Here's how I did it. Ignore the second stage:
    I wired a fuel pressure safety switch in series on the yellow wire to pin 85. You could put your EGT switch in that location.

  8. #38
    AJxtcman's Avatar
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    Re: How to install Nitrous the correct way! I need input

    Quote Originally Posted by NHRATA01 View Post
    Yes, buy a programmable nitrous controller that will act as the window and WOT switch, and has the option of offering 1st gear lockout. It will look for the tach to make 1 sweep to a certain rpm range before it will engage the nitrous. Then you don't have to monkey around with the second relay and wiring into the shift solenoid. Plus it will provide a window switch, which it looks like you don't have, and really should. Then just wire your EGT relay in series somewhere on the low current side.

    Here's how I did it. Ignore the second stage:
    I wired a fuel pressure safety switch in series on the yellow wire to pin 85. You could put your EGT switch in that location.
    Bad thing is the EGT lock out box triggers the the wire to ground when in fault.

  9. #39
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    Re: How to install Nitrous the correct way! I need input


  10. #40
    Highline Cady's Avatar
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    Re: How to install Nitrous the correct way! I need input

    Sweeeeet!!!

  11. #41
    blue_eldo is offline Cadillac Owners Fanatic
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    Re: How to install Nitrous the correct way! I need input

    Highline and AJ, when and where are you going to the track?
    I am in Milwaukee, on assignment, from now to the second week in June.
    I would very much like to see the DHS do it's thing.
    My background as a turbine controls engineer may be of some help as well.
    I have an Innovate LN-1 to use if you want to do some data logging.

  12. #42
    Highline Cady's Avatar
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    Re: How to install Nitrous the correct way! I need input

    Hopefully this weekend. The more the merrier. Figure we'll have to test and tune it yet, mostly at the track, just working on some of the safety devices. Best run w/out N.O.S. was a 14.6 down from a stock 16 flat. AJ's a wizard, hope we got enough magic to bust into the 13's, I know we have enough Nitrous.

  13. #43
    Highline Cady's Avatar
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    Re: How to install Nitrous the correct way! I need input

    Oh ya, it would be Great Lakes Dragway and thanks can never have to much help.

  14. #44
    AJxtcman's Avatar
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    Re: How to install Nitrous the correct way! I need input

    Note: check fuel pump

  15. #45
    Highline Cady's Avatar
    Highline Cady is offline Cadillac Owners Fanatic
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    Re: How to install Nitrous the correct way! I need input

    We need more pressure?

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