Remember, the engine must be at full operating temperature before tuning.
Once you have that, open the hole up to the next drill size and test the engine. The first thing you will want to do is identify the current jet size by inserting the best fitting drill bit into the existing jet orifice.
#Las vegas car tuning how to#
The pictures below will show you how to get to your jets: Its rare that the mid or high speed jets will need to be oversized.
In most cases, the only jet that will need to be enlarged is the "Low Speed/Idle" jet. To get started, you will want to get your hands on a "micro drill bit set", they can usually be found at Harbor Freight or on eBay for under $10 shipped and will include a hand pin vise : You need to be careful not to go too big or the engine will run rich (too much fuel) and you will get terrible gas mileage and foul spark plugs. The easiest way to do this is to actually drill out your jets, one size at a time, until the engine runs the way it should. We don't want to sell them this way, but we are required to by federal law! This isn't just our product, any new engine you buy from any vendor (Harbor Freight, Home Depot, etc) is going to have the exact same issue in a golf cart/automotive application. If you are having drivability issues, popping/backfiring issues, or hard starting issues.this is simply just a case of a carb in poor tune. In order to accomplish meeting emissions regulations, the carbs on our engines have to be run very lean (not enough fuel). That being said, our engines are stuck in 1970 with their archaic 3 circuit - single barrel carburetors, yet still have to meet strict EPA emissions standards to be allowed into the country. Lets be honest, if people would pay $3000 for a big block kit, all of our engines would come EFI.but that's just not the reality. Unfortunately, small engines haven't quite caught up to technology, and this is simply because of pressure to keep costs down. Pretty much all late model bikes, cars, even some golf carts come from the factory with EFI (electronic fuel injection). Carburetors are a thing of the past for most internal combustion engines these days.
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