Mac Color Classic - How to speed it up? :oD

Wow! Got a Mac Color Classic for $25! :oD And I made it work :oD Now I have a computer for that //e card :o) But it is slow, unbelieveable slow. Is there a way to speed it up without changing the main board? Can I overclock it? I already maxed the memory (but have no VRAM SIMM module) and no FPU, but 16MHz is too slow :( A 575 board would be great, but seems it has a premium price nowadays A little of history: Got this Color Classic and of course, no boot. Took off the motherboard and there was the classic signals of old computers from 90's: Dead PRAM battery, lots of leaked capacitors, tons of dirt. Cleaned the board, changed the capacitors, cleaned the goop with MEK, put a CR2032 with a socket to work as a PRAM battery replacement (these aren't easy to find here in Brazil) and it booted. No "bong", no sound. But it booted properly and loaded system 7.*.*, On shutdown, it BANGed something, and the classic smell of rotten capacitors was felt on the room. I disassembled the computer and wasn't able to find anything. Now the computer wouldn't boot, but no HD. Without the motherboard, the HD would spin up and thereafter, spin down. After disassembling the entire computer, I found the hard disk (!) with 4 leaked capacitors. I changed the capacitors and it still wouldn't boot, turning down the HD after some seconds. I changed the HD to another SCSI I had here from my HP16505A and it wouldn't spin down. HD problem. A more detailed exam shown capacitor goop on the HD digital board. I cleaned it with MEK and it is working properly. Unfortunately, I'm still unable to make it bong. No sound whatsoever. I tried to use an earphone on the audio output, but got no sound. Changed all the polarized caps on the motherboard (even tantalum ones) and no cigar. I still cannot figure what can be wrong. The audio amplifier SEEMS to be working. Interesting point: It bonged ONCE. Tips, suggestions, hints, are welcome :o)