i currently rebuilt my top end and new wiseco crank im curious of what gas ratio i should use i have Ben told 32-1 and 36-1 what is my best best on the ratio ?

 

I'd personally go 32:1 using top quality synthetic oil, especially if you have some decent bursts of speed planned where the engine is working/revving hard and getting hot.

Modern oils don't really smoke much and it's a little extra protection for your engine. Just my 2c, but too much oil is safer than not enough!

 

Not when it comes to 2 stroke oil mix! It's actually just the opposite! Too much oil actually starves the engine of fuel, which causes the engine to run lean, which causes the engine to run hot and could lead to ring failure. Years ago I thought the same thing and always added more oil "to be on the safe side" but found out later that I was doing more harm than good.

The way it was explained to me, you can think of the pre-mixed fuel in your tank as millions of drops of fuel/oil. 32:1 = 32 parts fuel to every 1 part of oil in each drop. 50:1 has more fuel than 32:1, which would richen up each drop, causing the engine to run cooler. 20:1 has less fuel than 32:1 which would cause each drop to be more lean than 32:1, causing the engine to run hotter.

With all that said, a lean engine runs better than a rich engine, and the key is to run a 2stroke engine hot enough to burn all of the 2stroke oil so it doesn't blow the unburned oil out of the exhaust. But a lean engine will also burn up the rings faster than a rich engine, so you have to be careful there also, or replace the rings more often.

 

thanks alot i was running 50;1 but im now running 32;1 time to mix up some gas and hit the flat track