Learning something new here all the time!

i doesent run rich because you force the lid down, it runs rich fron opening the cap, just like a gas can when pouring into a car, open the bleeder valve and flows faster= more fuel going into carb

Sorry but I have to disagree. The fuel tank is pressurized from the exhaust line, and once you crack that lid open it looses all it's pressure witch pushes the fuel to the carb. So in all reality it goes lean. Open your lind and hold it there, your motor will lean out.

Deadman is correct, when the tank is opened the pressure is down, and when you fill it full on a darn near empty tank you force a good amount mote fuel in the carb. A simple fix is to make sure you pit with atleast a 1/8 to 1/4 tank left. This way the tank will always have a good pressure and no pushing fuel threw on refills. If you have to pit under 1/8 tank for some resin keep above idle like deadman stated.

Hi guys,

planning to get GXII and would a GO 2047 pipe be advisable or better get the 2072? any advantages or disadvantages?


Thanks,

not a problem! you can disagree, but i agree with my therory. if you try to puor somthing that has no air getting to it, its not going to flow even being forced. exhaust doesent allow air, it forces it causes suction. which restricts flow.

not me or any of the guys I tune for if it is happening to you then I would say your still a little rich on bottom.

get the best, get a 2072

Matt I got the carb i will check it out and run it on my motor next weekend.

+1!

oh bah humbug LOL....j/k....but when you fill the tank to the rim and snap it shut...it will force more fuel into the line, NO MATTER WHAT!...not saying its gonna be alot..but it does...i have never seen anybody come out of the pit after bieng refueled and their motor be the same exact tune and spunk right out of the pit lane...it usually takes a couple corners for the motor to use up the extra fuel that you forced in...especially when trying to be fast...why do you think the famous "Flame out after being refueled" seems to get every one from time to time...even the pros

why do you think the famous "Flame out after being refueled" seems to get every one from time to time...even the pros


from sitting and idleing during refuel! we all know that a engine that will sit and idle forever is not tuned right. average sit and idle time before load up is 14 seconds. sitting and idleing=more fuel=less being burned=run rich untill access is burnt off

How long do you sit in the pit being fuelled ??? LOL I'll film a fuel stop for ya if I can, We always and my pit man always fills me rite to the top and snaps the lid shut as dropping the car into pit lane, think of your bottom end as a nozzle on a hose that is set correctly, turn on the hose tap and the flow throu the nozzle should be the same, also have your pressure line longer than your fuel line helps absorb the extra pressure as you snap the lid shut.

your joking rite ?????

my pit stops are about 3 seconds, ive never had the running rich problem

nope. alot of guys run rich from the get go, and sitting for 3 to 6 seconds only make it worse