I would like to put my stock 2.8 HP DB engine on the operating table to see if I can make it perform tons better. I know about the engine swaps, but I don't want to take the easy way out (not just yet). I am mechanically inclined and able to do most work (except for machine work) myself. This would be a great training tool for me to get acclimated with small engines. However, I need some answers to the following questions first:
1. How much material would be safe to shave off of a stock 2.8 hp Doodlebug head and engine block in order to bump up compression?
2. Will I need to shave the valve stems the same amount as the head and engine block combined in order to avoid valve to piston contact?
3. Would shrouding the valves be of any benefit?
4. Would I need to shave any material off of the valve cover.
5. Should I add 18 lb springs and remove the governor?
6. Can anyone recommend a billet or steel flywheel that is compatible with the stock engine?
7. Would the stock rod withstand 5000 rpm without failure, if not, where can I get a decent rod?
8. What size diameter tubing should I use to make header pipe that would compliment these mods?
9. Are the valve springs interchangeable from engine to engine?
10. What other parts (carburetor, air filter kit, etc.) would I need to purchase to tackle this job and build a reliable engine that can safely rev to 5000 rpm?
Thanks in advance for everyone's help.
1. How much material would be safe to shave off of a stock 2.8 hp Doodlebug head and engine block in order to bump up compression?
2. Will I need to shave the valve stems the same amount as the head and engine block combined in order to avoid valve to piston contact?
3. Would shrouding the valves be of any benefit?
4. Would I need to shave any material off of the valve cover.
5. Should I add 18 lb springs and remove the governor?
6. Can anyone recommend a billet or steel flywheel that is compatible with the stock engine?
7. Would the stock rod withstand 5000 rpm without failure, if not, where can I get a decent rod?
8. What size diameter tubing should I use to make header pipe that would compliment these mods?
9. Are the valve springs interchangeable from engine to engine?
10. What other parts (carburetor, air filter kit, etc.) would I need to purchase to tackle this job and build a reliable engine that can safely rev to 5000 rpm?
Thanks in advance for everyone's help.