Another stupid nitrous question(fuel pump Q?)
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Another stupid nitrous question(fuel pump Q?)

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    Senior Member H20MOFO's Avatar
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    Default Another stupid nitrous question(fuel pump Q?)

    Thinking about spraying my way into the 80+ zone. There has been alot of talk about having a dedicated fuel pump for the nos, is there any reason I can't just get a different regulator an use my clay smith mech. pump for the motor and the nos??? And while I'm asking ...what plate are you guys running? I'm just looking for like a 200 or so shot nothing huge.
    Another Hot Boat refugee

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    Senior Member Boat 405's Avatar
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    Quote Originally Posted by H20MOFO View Post
    Thinking about spraying my way into the 80+ zone. There has been alot of talk about having a dedicated fuel pump for the nos, is there any reason I can't just get a different regulator an use my clay smith mech. pump for the motor and the nos??? And while I'm asking ...what plate are you guys running? I'm just looking for like a 200 or so shot nothing huge.
    the edelbrock starter kit has good solenoids and decent price. They have a plate kit good for 100 - 250 shot. I think it is around 500 bucks with bottle. It's nice to have a dedicated fuel pump, but not totally necessary. I ran two regulators from my pump(aeromotive pump) and it works flawlessly. One for the carbs and one for the nitrous. The standard holley fuel regulator works great for most applications, they are cool being deadheaded until you use it.
    Boat 405.

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    Sit N' Spin Jetaholic's Avatar
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    Quote Originally Posted by H20MOFO View Post
    Thinking about spraying my way into the 80+ zone. There has been alot of talk about having a dedicated fuel pump for the nos, is there any reason I can't just get a different regulator an use my clay smith mech. pump for the motor and the nos??? And while I'm asking ...what plate are you guys running? I'm just looking for like a 200 or so shot nothing huge.
    Have you tuned and maximized the engine's performance as it stands now? Have you tuned and maximized the hardware and setup you currently have? If not, I'd do that before I go strapping N2O.

    However, if you're still dead set on adding nitrous, honestly, I'd post up the specs on the internals of the engine here and let some of the engine experts advise you on how to set up the nitrous kit before you go strapping one on and possibly hurting your motor. Just a thought.



    Quote Originally Posted by HammerDown
    Kendall L-427 Super Blu...extreme-pressure (ep) lithium complex keeps my thrusting balls happy
    Quote Originally Posted by back2k5 View Post
    Well I am putting in a nice stereo system in the Carrera...maybe Ill put on some rap and turn the scoop sideways

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    Senior Member motormonkey's Avatar
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    A 200 shot is not a small shot. and will need a dedicated pump for fuel. Find a good nitrous company and use what they recomend for thier system.
    There is such a learning curve that it is to hard to just say what you need. The set up is easy with some common sence stuff, but tuning it has a learning curve. Than its fun.

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    Senior Member H20MOFO's Avatar
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    Quote Originally Posted by widowmaker View Post
    the edelbrock starter kit has good solenoids and decent price. They have a plate kit good for 100 - 250 shot. I think it is around 500 bucks with bottle. It's nice to have a dedicated fuel pump, but not totally necessary. I ran two regulators from my pump(aeromotive pump) and it works flawlessly. One for the carbs and one for the nitrous. The standard holley fuel regulator works great for most applications, they are cool being deadheaded until you use it.
    Thanks for the help guys. FWIW I think I have a decent nitrous motor on accident. My quench is .065(on accident) and my compression is 8.5 to 1 (on purpose). I went with a low CR thinking I could afford forced induction, but that ain't happening soon. Long story short my 557 will run about 72 mph at 4300 ft with the timing set at 37*, at 6500 ish and 42* I just ran 75mph. Am I delirious to think I can run 35* total and a 200 shot??? I'm not overly worried about the bottom end(famous last words)lol, ring gap is .027.
    Another Hot Boat refugee

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    Sit N' Spin Jetaholic's Avatar
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    Quote Originally Posted by H20MOFO View Post
    Thanks for the help guys. FWIW I think I have a decent nitrous motor on accident. My quench is .065(on accident) and my compression is 8.5 to 1 (on purpose). I went with a low CR thinking I could afford forced induction, but that ain't happening soon. Long story short my 557 will run about 72 mph at 4300 ft with the timing set at 37*, at 6500 ish and 42* I just ran 75mph. Am I delirious to think I can run 35* total and a 200 shot??? I'm not overly worried about the bottom end(famous last words)lol, ring gap is .027.
    Craig, how heavy is your boat? Just curious as to why you have to spin nearly 1200 RPM more to go the same speed as I do (wondering if it's possible that your tach could be off). Also, what impeller are you running that will allow an 8.5:1 motor to spin it to 6500?



    Quote Originally Posted by HammerDown
    Kendall L-427 Super Blu...extreme-pressure (ep) lithium complex keeps my thrusting balls happy
    Quote Originally Posted by back2k5 View Post
    Well I am putting in a nice stereo system in the Carrera...maybe Ill put on some rap and turn the scoop sideways

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    Senior Member H20MOFO's Avatar
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    My bad...6500ish is the altitude I ran 75 mph with 42* adv. I'm about to put together a tighter pump with a detailed bronze b cut agressor(sp?) Right now I have to spin a ab cut to 5300-5400 to hit 75 mph.
    Another Hot Boat refugee

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    Sit N' Spin Jetaholic's Avatar
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    Quote Originally Posted by H20MOFO View Post
    My bad...6500ish is the altitude I ran 75 mph with 42* adv. I'm about to put together a tighter pump with a detailed bronze b cut agressor(sp?) Right now I have to spin a ab cut to 5300-5400 to hit 75 mph.
    OK that definitely sounds more plausible



    Quote Originally Posted by HammerDown
    Kendall L-427 Super Blu...extreme-pressure (ep) lithium complex keeps my thrusting balls happy
    Quote Originally Posted by back2k5 View Post
    Well I am putting in a nice stereo system in the Carrera...maybe Ill put on some rap and turn the scoop sideways

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    Senior Member Hass828's Avatar
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    Quote Originally Posted by H20MOFO View Post
    Thanks for the help guys. FWIW I think I have a decent nitrous motor on accident. My quench is .065(on accident) and my compression is 8.5 to 1 (on purpose). I went with a low CR thinking I could afford forced induction, but that ain't happening soon. Long story short my 557 will run about 72 mph at 4300 ft with the timing set at 37*, at 6500 ish and 42* I just ran 75mph. Am I delirious to think I can run 35* total and a 200 shot??? I'm not overly worried about the bottom end(famous last words)lol, ring gap is .027.
    Thats a large engine to be running that much timing on, usually you'll see an engine of that displacement making its best power with 28-30 degrees of timing, but there are alot of variables that may be causing you to run so much, like the large quench and low comp, cylinder heads come into place as well as cam and a whole other host of items, if it were me I'd run 30 degrees locked and let it eat. 35= to much IMO, My .02

    Oh Yea, and you better run at least 110 fuel while on the squeeze.

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    Senior Member hotbo's Avatar
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    your clay smith pump(if its the 140gph)like hass said atleast 110gph, will handle all the fuel flow needed for a 200 shot.

    again there is no vodoo when using nos,all the naysayers are scared or to ignorant to have figured it out.

    if you were going to go really big then thats when you need to start thinking about,another pump,added regulators,big learning curve,ect.

    i like the nx express hitman kits,100-200 shots.they work great,but in reality just about any of the kits will work great.

    they all require different fuel pressures.

    motormonkey is wrong wrong wrong on the fuel pump.200 is not small but is by no means big.good luck and sounds like you are ready to have fun

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    Resident Ford Nut Sleeper CP's Avatar
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    Quote Originally Posted by hotbo View Post
    your clay smith pump(if its the 140gph)like hass said atleast 110gph, will handle all the fuel flow needed for a 200 shot.

    again there is no vodoo when using nos,all the naysayers are scared or to ignorant to have figured it out.
    As said by the the "good ol boy's" those Clay Smith fuel pumps move some fuel. I know a guy who ran a 250 shot off one on a built 468 with a tunnel ram and two 750's, that engine screamed. It was the large(Smith Mechanical) pump and he ran a 1/2" pipe out of the pump with a Tee to a Holley regulator for the Nos system.

    If you ever get a chance hook your Nos system up with an electric pump. You'd be surprised as to how little fuel is used at 6psi through the Nos fuel jet. Just make sure you run over-size fuel lines for the fuel system if using the same pump for the engine and the Nos. It helps a lot.

    Just my .02

    S CP

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    Senior Member motormonkey's Avatar
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    Well, use that pump than. I wonder what the surge pressure #'s would be and the dead head on that system would be like? I thought he wanted to drive around all day and hit it every once in a while.
    Im wrong then.

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    Senior Member hotbo's Avatar
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    Quote Originally Posted by Sleeper CP View Post
    As said by the the "good ol boy's" those Clay Smith fuel pumps move some fuel. I know a guy who ran a 250 shot off one on a built 468 with a tunnel ram and two 750's, that engine screamed. It was the large(Smith Mechanical) pump and he ran a 1/2" pipe out of the pump with a Tee to a Holley regulator for the Nos system.

    If you ever get a chance hook your Nos system up with an electric pump. You'd be surprised as to how little fuel is used at 6psi through the Nos fuel jet. Just make sure you run over-size fuel lines for the fuel system if using the same pump for the engine and the Nos. It helps a lot.

    Just my .02

    S CP
    i ran holley blue(110gph) for years and ran 150-200 shot all the time,threw a holley cheapo reg.ran just fine never any problems.

    i know run a mech.110gph pump and no problems.plumbed the same way.except done away with the reg.runs just as good if not better.
    the mech.pump is pre-set to put out no more than 7psi.when i push the button on a 150shot the pressure stays at 5.5psi.were i like it.

  16. #14
    Senior Member flat screwd's Avatar
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    The problem I have found with using the jug on a daily drivers is that the tune needs to change along with the HP requirements premium pump gas will only get you to a 150 shot safely any thing bigger than that and you will need a spark retard system or a dedicated fuel source with a higher octane rating.

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