BANDOLEROS > General
Carb Loading Up
DCK2683:
There should be three hoses to your fuel pump, one from the fuel cell to the fuel pump, one from the fuel pump to the top of the carb, one from fuel pump (center hose) to the side or lower part of the carb on the right side. The one in the middle that connects to the side of the carb is the vaccum hose, that is the one you want to connect to the valve cover.
I would guess the jet is a 92 and was just hard to read, very unlikely someone would have it jetted as low as a 52. The carbs come standard with a 94 and 98 jet. These jets when run with a restrictor run very lean. Most who run a restrictor run a 110 jet for both cylinders. The black "screws" on the carb are for adjusting the fuel flow. You should start with the screws 2 1/2 turns out. One of the best ways to check to see if it is running lean or rich is to have your driver kill the engine right before he is slowing down to leave the track and then pull the plugs in the pit area, this will give you the most accurate readings. If to lean turn the screws out a little, to rich turn them in a little. Air flow and jetting are VERY critical when running a restrictor. Make sure your air filter and air filter sock are clean. As far as the cylinders, the 1 is closest to the rear of the car, thus when you pull the carb and turn it over the "hole" to the left is #1 and the "hole" to the right is #2.
Also, does your track have a gear rule? Our track has a minimum gear rule so everyone runs the same gear. At our track all the experienced drivers flat foot it around the entire track so momemtum is very crucial, thus everyone runs a 15 clutch gear more maximum top end. Once your driver gets more experience run a 14 or 15 clutch gear. Run a rear gear that will keep you right under hitting the rev limiter.
Dan
3nracing97:
Thanks for all the info, you are a lifesaver. Our track doesn't have a gear rule and the first week we were on the revlimiter so this week we made a 4 tooth change and we are now off of it. I am going to try going up 2 teeth and see where that puts us. We are running the 15 on the clutch. He is already flatfootting it but he does let off some in the corners just to help the motor not stumble as much in the corner.
Just wondering how this stuff works, how does the carb get vacuum from the valve cover. Wouldn't the port on the carb pull more vacuum? Not doubting you I just like knowing how stuff works and I have worked on cars for years and this new stuff makes no sense to me.
Kevin
justfreaky:
Kevin,
Don't know if this helps any; But Shane is pretty knowledgable on these go kart type engines. Try this link:
http://www.affordablegokarts.com/fuel-pump-setup.php
Steve
DCK2683:
--- Quote ---Just wondering how this stuff works, how does the carb get vacuum from the valve cover. Wouldn't the port on the carb pull more vacuum? Not doubting you I just like knowing how stuff works and I have worked on cars for years and this new stuff makes no sense to me.
--- End quote ---
It's all because of the restrictor. The restrictor reduces air and fuel flow. These low horsepower engines with vaccum pumps do not need much disruption in vaccum/air flow to cause issue. When the restrictor is put on it causes enough of the air flow (vaccum) to be decreased coupled with the "forces" of banking to limit the fuel going in the carb enough to sputter. Within the valve cover it is no different than any other engine in that there is constent pressure from the engine parts and it has to be vented no matter what or it could cause internal damage. This is why there is a overflow on the #2 cylinder valve cover, it not only acts as both an overflow and vent. So there is enough air/vaccum within the valve cover area. When not running a restritor you should always have the vaccum off the carb.
justfreaky:
Kevin,
Did you find your problem? Wondering what the solution ended up to be?
Hope all is working good now!
Steve
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