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nitromethane and the small block chevy:

Discussion in 'The Hokey Ass Message Board' started by c-10 simplex, Dec 29, 2013.

  1. porknbeaner
    Joined: Sep 12, 2003
    Posts: 40,954

    porknbeaner
    Member

    A lot of us share the same sentiment.
     
  2. Roger O'Dell
    Joined: Jan 21, 2008
    Posts: 1,015

    Roger O'Dell
    Member

    well we ran the can @ 15 to 1 or 151/2 but that was a big inch arias, since then I believe you see more injected than blown alchol in the class. We ran 5.77 @ 255 in 92
     
  3. Be careful with toluene. When we took our bike to the salt in 2010, I was playing with toluene. At 10% with 60% nitro, we stuck the piston. Toluene pulls the flame down the cylinder promoting a more efficient burn of the fuel charge. Problem is, it also creates more heat. You can buy it at paint stores. Some old time painters use it as a thinner. Be careful!!
     
  4. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 8,947

    Rusty O'Toole
    Member

    You can use all the nitro you want - once. Bring a broom and dust pan.
     
  5. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,355

    falcongeorge
    Member
    from BC

    don't think toluene is an oxegenate anyway. Not really the same thing.
     
  6. old flopper
    Joined: Apr 23, 2013
    Posts: 246

    old flopper
    Member

    I confess I don’t know shit! But have built and drove several nitro burning hemi’s, both blown and injected like one in my avatar that was 11:1 injected 426 hemi and ran 80 to 85%. I did however think your talking blown. By the way, straight out of drum good nitro is 99.9%.
     
    Last edited: Aug 12, 2015
  7. old flopper
    Joined: Apr 23, 2013
    Posts: 246

    old flopper
    Member

    Precisely why you could see guys with long ratchets jacking blown motors backwards a couple of turns before starting in staging lanes.
     
  8. Ebbsspeed
    Joined: Nov 11, 2005
    Posts: 4,562

    Ebbsspeed
    ALLIANCE MEMBER

    If it's just flame and the light show you're after, just pump it directly into ports at the base of the exhaust headers. It won't sound like a nitro motor, but you'll get the flames and the smell. And a hell of a lot cheaper.
     
  9. stimpy
    Joined: Apr 16, 2006
    Posts: 3,547

    stimpy

    correct toluene is a hydrocarbon that burns slower ( raises octane number ) but has a good amount of Btus in it .
     
  10. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,355

    falcongeorge
    Member
    from BC

    yup. No experience with nitromethane, plenty with toluene and nitropropane...;)
     
  11. stimpy
    Joined: Apr 16, 2006
    Posts: 3,547

    stimpy

    isn't NP the same as Nitromethane ??? or a precursure to it ??? as nitromethane is made from propane and nitric acid .
     
  12. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,355

    falcongeorge
    Member
    from BC

    precursor to it in terms of the manufacturing process? Could be, I honestly don't know. I DO know its cheaper and easier to get, and works well, although the gains are not as substantial. But it will definitely pick up power, and its not as easy to detect, although it will show up in a full-on NHRA fuel check. But its not like you can walk by a car idling in the pits and smell it, like you can with nitromethane.
     
  13. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,355

    falcongeorge
    Member
    from BC

    Wikipedia to the rescue...
    nitromethane: CH 3NO 2
    nitropropane: C3H7NO2
     
  14. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,355

    falcongeorge
    Member
    from BC

    1-NP and 2-NP are also both known carcinogens, handle with care.
     
  15. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,355

    falcongeorge
    Member
    from BC

    Preparation
    1-NP is produced industrially by the reaction of propane and nitric acid. This reaction forms four nitroalkanes: nitromethane, nitroethane, 1-nitropropane, and 2-nitropropane. 1-NP is also a byproduct of the process for making 2-NP, which is done by vapour phase nitration of propane.

    looks like its more of a by-product than a precursor.
     
  16. ottoman
    Joined: May 4, 2008
    Posts: 269

    ottoman
    Member
    from Wisconsin

    Back in the day we cut our Nitro with PO.. Propylene oxide I believe is the correct name. Dont remember why we used it instead of alcohol but it seemed to work pretty well on a unblown motor.
     
  17. heminh2o
    Joined: Oct 28, 2013
    Posts: 98

    heminh2o
    Member
    from Tulare, CA


    They still do....
     
  18. old sparks
    Joined: Mar 12, 2012
    Posts: 414

    old sparks
    Member

    Ran up to 15% in a 509 Donavon with 13 to 1 and constant flow hat type injection. Above that I started getting what is called pepper on the plugs. Pepper is burnt aluminum, looks like pepper. It feels like you just added a passing gear and stinks enough in the cockpit to make your eyes water. What a kick!
     

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