butterbagz
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I wasn't sure if could get 20+ hp with this idea but, using ported and polished hemi head, stage 4 kit, 356 lift cam with 36 lb valve springs.
I bought a used go kart for 150It's certainly possible to do, with those things I do not know, but why not a 420cc predator?
Also I need something lightweightIt's certainly possible to do, with those things I do not know, but why not a 420cc predator?
I'm just put high performance parts in it and watch a tutorialIf it was me, I would work up to a 10hp output first, then see if I was still greedy enough to proceed.
Come awnn! Mr. Negative! Everyone knows that youtube has only highly educational, accurate information! Fact Is who needs Skool? Wanna learn to do something the right way? Youtube! it always works out! Sadly there was no Youtube back when I was a kid. We saw dinosaurs roaming almost everyday tho!Watch a video, throw money at it. Hope it works out.
I'm not going to get a kit I was just gonna get the parts separatelyI wouldn’t buy a kit. You can usually get better parts cheaper elsewhere. For instance, what carb does the kit use?
What If I get a 32/28 big block valve hemi?Hey young fella. With a hemi head and a .356" lift cam your valves are going to hit the piston long before the cam reaches full lift. Getting 20 hp will be very expensive. Getting 15 to 16 is quite doable. If you already have a hemi engine, then buy a bare non hemi head to build. If you don't have the engine yet, then buy
the non hemi. The non hemi head will bolt on your engine. Port the head, also mill it .065" to raise compression. You need a flat top piston ( hemi comes with one, ) non hemi you need to buy an after market one. Any cam with more than .310" lift you need extra long valves to prevent coil bind. And with 36 lb valve springs you need stainless steel valves, otherwise you stand a good chance of ripping the heads right off the pot metal stock ones. 26lb springs and a lower lift cam will get the job done. You have been watching too many vroom vroom videos. Educate yourself a little by watching Red Beards Garage. He will show you close up how to build your engine. Then watch his series of videos titled the road to horsepower. He installs speed parts on a predator engine, and after each part runs the engine on a dyno. Letting you know how much power each modification is worth. Value to you is priceless.