I'm tired of these clutch boys whoop'n my butt the last 120ft. When this happens, you have to look for replacement carbs. Yet sometimes this engine can develop problems because of a faulty carburetor. It is a powerful engine with 212cc displacement and 6.5 hp output. The Predator engine from Harbor Freight is a popular choice for go-karts. You'd want to set it up to hold your pk TQ rpm the duration of your race and have the sheaves slowly transition in the wheel speed. 5 Best Predator 212cc Engine Carburetors. So revving to 8-9k with a converter woudl be less than ideal. I'd have to assume this is the most efficient route for "Drag racing". Yet when you go to the drag strip and listen to the JR dragsters with theri $1000+ clutches they basically stay at peak torque RPM the entire run and let the converter do the work. How can we modify it? Would heavier weights provide more force/grip at RPM? It's the only real difference I see on the 40 series aside from the V-belt. So what is it that provides the "grip" exactly. The 40 series unit weight a TON! More than my cast alum flywheel for sure. Why is a belt gripping both sides not going to allow more power with less belt slippage? Is it the weights inside the unit? Would heavier fly weights in the driver grip the belt more tightly? So what I don't get is why the 20 and 30 series would both be rated to 8hp? If the 30 can handle 8 with one side of the belt gripping the sheaves. Lots of belt dust! First run is always the best. 160 head, old 212, 22mm carb, exhaust, MOD2 cam and 34* timing. Its a mild build, doubt its more than 10 hp. FWIW I routinely saw 6500-6600 RPM on my 30 series this weekend. In summary, a go kart torque converter is ideal for rough and off-road terrain where there are obstacles to be avoided or crossed and uphill driving may be. Thank you for the reply! Not much information out there on the cheaper converter performance aspect.
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