i got speed in cool.weather

Discussion in '2-Stroke Engines' started by WINDY CITY BOB, Jul 14, 2016.

  1. Okay I fixed all air leaks exhaust is good and right now I'm using an NGK b7hs plug.
    Now when I go for a ride at night and it's nice and cool around 70 to 75 degrees and the sun is down I fly I'm getting 35-plus miles an hour The old saying in Chicago is if you don't like the weather wait a minute it'll change. That couldn't be more true I need to find what plug to run on during the hot part of the day I have my carburetor set on the top 10 to run it lean. Modified exhaust. Ripped out all the inside Rings drill the boatload of holes extended the pipe from the engine all the way out to the back with the muffler pointing out just be on the rear axle works great. I have carbon fiber air filter put on with a high-velocity intake manifold that had to be bored out just so I could fit that air filter on there. Awesome air intake. However when it's 90 plus degrees outside at High Noon and the heat index is over a hundred degrees with 90% humidity I need a different spark plug recommendations please. Thank you in advance. W.C.B.
     

  2. Frankfort MB's

    Frankfort MB's Well-Known Member

    A b8hs is the coldest I think you can go on these engines
    It's a little harder to start in cold weather but I think we all can agree that we need some exercise;)
     
    WINDY CITY BOB likes this.
  3. butre

    butre Well-Known Member

    a b7hs works fine for me in worse conditions. look to your cylinder head and your jetting.
     
  4. KCvale

    KCvale Motorized Bicycle Vendor

    90F+ hot?
    That is the morning LOW temp here in Phoenix this time of year, 91F the last few mornings, and it just goes up to triple digits all day from there.
    I think however it's the humidity in the air that makes the difference in you incoming air.
    It's denser and the water content in it can't help.

    All I run here in the dry heat are Iridium plugs.
    NGK 5944 (BPR7HIX) for 2-stroke.
    NGK 7544 (CR7HIX) for 4-stroke.
    If a build has a problem, the plug is the last place I have to look.
     
    WINDY CITY BOB likes this.
  5. DWell Thanks first hand. Next I'm still a bit of a newbie.
    AND I KNOW HOW HELLACIOUSLY HOT IT IS IN AZ! I lived near the corner of Mesa & Brown. "Rt @ the corner in those apartments. They were sweet back in the 80's Dunno what there like now
     
  6. What are those concrete creeks called that they open & close when it rains??? There was one of those rite outside the carport.
    I KNOW A CANAL!! I was all packed up ready to drive back to Chicago, & found out I was bitten by either a widdow/er Brownreclu, u had to have Recluse. Months after being so I needed to get my arm scooped out with a scalpel where's said spider has bitten me in my arms had grown fatty tissue around the poison. It was about a half inch deep by 8 millimeters around. They packed it with some funky medicine on a little tiny gauze pad.

    I don't know exactly when I was bit? But when the poison hit me I seen multicolored spots in perfect circles on the way back from Taco Bell walking down the side of the canal/ my head was on fire my entire body was tingling like unbelievable experience I've never experienced in my life! So I went to the immediate care center and they said all they can do is give me a sedative shot I explained to them I'm getting in the car and driving straight through to Chicago. They said sorry this is all we can do? So I took the shot went to a Circle K by the case and no doz And white knuckled it down the mountain riding my brakes for about an hour-and-a-half smelling nothing but brake pads
    wow I really got off on a rant here what the hell was I talking about? . M.
     
  7. Anyhow the plugs were the last thing I checked so I bought a boat Load of spark plugs because they are cheap. I used E3.22. Much improvement from stock plug. Then I went to the NGK plugsB6,7,8HS AMD VOILA
    I know you had mentioned that the spark plug is the last thing you would check if youw had a problem. However I don't really have a problem I just need to find a spark plug that works best in the high humidity high heat. So far the truck that works fast is the E3.22
     
  8. jaguar

    jaguar Well-Known Member

    it's more a matter of jetting than plug rating. (#7 is fine)
    humidity means more dense air which means more oxygen which means leaner.
    so if it runs weaker in high humidity you need richer jetting.
     
  9. KCvale

    KCvale Motorized Bicycle Vendor

    I am familiar with Mr. Brown Recluse, I call him Mr. because you better show him respect if you see him.
    I didn't when he crawled into my sleeping bag on a camping trip.
    The way I see it, screw him, it was MY sleeping bag!
    He got me good in the back but didn't live to tell about it to his spider friends ;-}
     
  10. It was one hell of a bite thiugh was it not?
     
  11. Okay great, however do you know of a good iridium plugs for humid hot weather? Without having to rejet and all that other stuff.
     
  12. KCvale

    KCvale Motorized Bicycle Vendor

    Monsoon arrives tomorrow, that plug has always worked for me and I have never had to re-jet to compensate.
     
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