darkfa8
Key Veteran
Location: Eatontown, NJ, USA
| In automotive engines do you realize that polishing the combustion chamber has no net effect on improving performance in any measureable way?
Leaving a slightly rough surface, typically with 80-grit carbide rolls does help slightly to improve the way the air and fuel mix in the chamber. Otherwise, polishing it to a mirror finish does nothing but look pretty and who is going to see in your combustion chambers anyway?
The primary reason combustion chamber work is done is to take off any edges that could promote hot spots that would lead to pre-ignition of the air/fuel mix. Also, to improve, where confines allow, the turbulance in the chamber to better mix the air/fuel.
Unless you can show a dyno graph, or produce repeatable, controlled conditions that show improvements with your methods, the polishing is a waste of time.
Like Ben said, if you know how to tune the YS motor to begin with, it doesn't really require any "mods" to be a better motor.
If I were going to do anything to the motor and had your money to burn, I'd send the piston, cylinder head, back plate and crank out to be coated by SwainTech or Polydyn. A thermal barrier coating on the combustion chamber will be more effective at concentrating combustion temps to make for a hotter combustion event. A thermal barrier coating on the piston crown will also help, along with a friction reducing coating on the piston skirt. A friction coating on the crank will aid in keeping windage down and can increase RPM ability. A friction reducing coating on the back plate will slow wear and tear if the connecting rod journal end comes in contact with it. RC car guys have used these methods with some measureable success.
All in all, the wear factor is the larger benefit since even on full size auto, marine and motorcycle engines with these treatments only show small percentage output gains, on a model engine of this size, the benefits would likely be damn near nill.
But hey, some people like gold teeth. They don't chew food any better, but they sure do look nice. 
- Dan G. - |
i am everything i say i am. I just can't see why people will pay over the odds for something that for me is easy to produce.
