My ram air

Discussion in 'Performance Mods' started by unraw, Nov 1, 2008.

  1. unraw

    unraw Member

    Well i got it done. It amplifies the intake like crazy!! The intake it 2x louder than my exhaust! Performance wise It does pull a little better against wind. I think I need to put some kind of scoop on the end to catch more air. I had a sock over it for a air filter, but it was so restrictive that the engine built up a vacuum and eventually stalled. Does anybody have suggestions for a high flow/cheap/still filters the air good? My top end has also improved. I cant say how much because my speedo broke. ): well, here are the pics.

  2. ZnsaneRyder

    ZnsaneRyder Member

    Look for some cheap mini-bike cone style filters at tractorsupply, or get a small cheap cone filter for a car, and adapt it to that pipe!

  3. fastboy9

    fastboy9 Member

    Or instead of the sock, why not try some ladies tights, i think you americans call them panty hose, but I'm probably completely wrong.
    I used this as a screen on a home made air filter
  4. graucho

    graucho Active Member

    Hi unraw, what size is that PVC 1.5, 2" Can you give us inside and outside mesurements so we can help a little better with a filter? :cool:
    Opps forgot, looks very cool. Neat idea.
  5. unraw

    unraw Member

    oh, ya I forgot. Its 2" pvc pipe used for Vacuums that are built into the house. (forget what there called)
  6. 350zdrftr

    350zdrftr Member

    sorry for bumping an old thread, but how did this work out for you? and how did you adapt it to the carb? thanks
  7. speedracer831

    speedracer831 Member

    bump bump how well did it work? did it lean out the mixture? how much louder?
  8. MikeJ

    MikeJ Member

    If you want to avoid intake noise, could the pipe be pointed downward? That would redirect the intake pulses down and away from you. A forward facing intake pipe looks fast, but probably doesn't really add much in the way of additional speed... Or is it different in real life?
  9. wheelbender6

    wheelbender6 Well-Known Member

    Look at some of the posts from guys that made their own velocity stack intake. They reused the plastic plate, screws and air element from the original air cleaner. You can rig something to hold the original air element against the plastic plate on the carb.
  10. motorpsycho

    motorpsycho Active Member

    you are wrong. a forward facing intake will make a ton more power than one that is facing backwards or down. That's why it's called "ram air"...the air is literally "rammed" into the intake by the forward momentum of the bike.
    this is why chevy made the cowl induction hood, Pontiac, and olds made the ram air hood back in the early 70's. cramming as much air into the motror gives more power and having the opening face forward, the air is pushed into the carb.
  11. Mike Hunt

    Mike Hunt Member

    thats awsome, what size of tubing did you use and where did you obtain it? was it hard to fit onto the carb? i want to make one for myself.

    ok now theoretically speaking, what if you were to spread out the open end into a funnel shape and put an rc plane motor in there with a prop to suck the air in, would that give a noticeable improvement?
    Last edited: Oct 3, 2009
  12. machiasmort

    machiasmort Active Member

    Thats exactly what I was going to suggest. Cut the end of a plastic funnel and add it to the pipe for a flare! Also, I noticed you have a rivit or bolt thru the pipe to secure it. Try to eliminate anything that will disrupt the airflow thru the pipe.

    LOL, I wonder if a small computer fan would run off of our magnetos. Stick one of those in the end for a super charger! LOL!
  13. RdKryton

    RdKryton Active Member

    You better be careful. If you jam too much air into the carb it will lean it out way too much and you will kill your engine. These carbs need vacuum to pull fuel from the bowl. If you have pressure instead of vacuum you will lean it out. A lean mixture will run better but it will take it's toll on the engine. You would need fuel injection to compensate for the extra air to keep the mixture correct.

    Last edited: Oct 4, 2009
  14. Parah_Salin

    Parah_Salin Member

    OK, so two things:

    Do you know if it would work better if you switched the engine block around so the intake was on the front? Wouldn't need that bend. I'm also asking this because the way my setup is working, or not working in this case, I got my carb bolted to ware my rear reflector is and am trying to connect it with hose, and it's ****ing me off, so I think I might switch it around.

    And the funnel idea I think would work really well. I'd just find some vaguely scoop/funnel shaped object and throw it on the end.

    I'd like to see how the computer fan works out, though if you could run an intake fan off the chain it might work better (because where would you get the electricity for the computer fan?).

    This gave me a really cool bad idea. supercharged ram air HT with a retro table fan (like 8" diamiter) up front sucking in air.

    Oh, hows the boost bottle working for you?
  15. Mike Hunt

    Mike Hunt Member

    screw a computer fan, not nearly enough power, i was thinking more along the lines of a gas rc motor to be used to power the intake. maybe even use it for a starter (small electric motor to start rc engine, rc engine connected to ht motor to start it, with a jackshaft or something to spin the prop for the intake). it will make the bike 200% more badass with two engines.
  16. Parah_Salin

    Parah_Salin Member

    Why not just hook the RC engine up to the front wheel?