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« Last post by 94touring on Today at 07:11:46 AM »
Haven't touched the mini since my last post in here, so sat for about a month and a half. Took a break from baby sitting my niece who's non stop talking finally wore me out. Washed up the mini, aired up the tires, and drove to the shop to fiddle with a vernier choke cable I bought probably two months ago but haven't had a chance to install. What is a vernier choke cable you ask? If anyone has ever flown a small piston airplane the fuel control is set by an adjustable vernier knob and cable. Our mini choke pulls in and out, may or may not stay in place, but a vernier cable you can also pull in and out, or twist the knob and fine tune. It always stays where you set it. Why did I want one? It's been a real bitch to put it mildly to get a perfect fuel curve at all styles of driving with my setup according to the air fuel gauge which doesn't lie. Butt dyno doesn't either. High cruise being an area that I can't get rich enough to have your standard 13:5-14:7 air fuel ratio, at least not without screwing up my full throttle or low end performance. I've tried about every needle and spring weight combination you can think of. Shaved needles too. Finally converted to fixed needle (13 station vs 16 a bias has), got a needle that makes all daily driving perfect, but full throttle runs it pig rich and kills performance, also creates a low down rich spot off idle at full throttle that bogs and bucks the car. Having tried several fixed needles determined they don't work with my carbs as the needle length just gives me full pig rich at full throttle regardless what I go with. Mintylambs website is back up so using all my needle knowledge ran some comparisons and picked a few bias needles that get me in the ballpark. Fabbed up a bracket to hold the vernier cable, tossed in my needles, and did some test. Got my WOT air fuel back to 12:5-13:0, which significantly increases power and fun factor. Normal around town driving is still normal, not too rich and boggy, not too lean with flat spots. Get on the highway going above 65-70 and as the air fuel goes lean ( talking 18:1) causing power loss, flat spots, and probably not too good on the valves, a few twist with the vernier cable moves the jets, and I'm back to a peppy cruise air fuel. You can feel it come back to life. Get back into town, give it a few twist in and it's back to town driving. If I'm in race mode leaving it set for high cruise doesn't effect my air fuel in the 5k rpm and above range I run it at. On the drive home during rush hour down hwy 75 doing 70mph turning 4600rpms had a rice burner and some girl in a convertible trying to get all racey with me. I blasted away and through traffic leaving them in my dust.
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