Dude....stop fucking around and wasting time with bullshit mods.
KA24E's are cheap.
Complete motor from a wrecker will cost you about $150.
Pull it down, and play around with it. Learn how to reassemble it. Then build your own motor.
I fucked around with bullshit mdos when I was 18, and got fuck all return from the mods that I did.
The self "ported" head that is still on the motor is getting cut up in a bandsaw so I can properly develop the next head. That's all it is good for.
Bottom end is getting built strong for boost in my application, but you can change to a high compression forged piston for a NA motor.
Here's my recommendation for someone that is on a budget but wants a more "lively" KA:
- Lightweight flywheel, about $400 from the US. This will make the motor far more responsive, and will allow it to rev up quicker.
- A cam with > 264 deg duration on the intake / exhaust lobes. This alone will get the motor pulling hard to the rev cut at 6500rpm.
- A decent set of extractors. All the off the shelf crap, is well...shit. Primaries that are at least 40mm ID are required...off the shelf stuff is about 38mm. a 4-2-1 collector is what you need too.
- No smaller than a 2.5" exhaust and a 200 cpi cat. Backpressure is not your friend in a NA motor.
- Keep your Swirl Control Valves, make sure they are working however. If they aren't working, it'll drive like a dog under 2800rpm.
That should cost you under $2k if you are smart and shop around. The extractors don't need to be stainless steel either.
Oh..and to answer your original question, KA24E cam gears are as light as possible already without sacrificing durability. Last thing you want is a cam gear breaking and fucking your motor.