ok the the injector mixes at 20:1 doesent it? and if you changed from 20:1 to 32:1 would you have to go up or down in the main jet?
ratio?
- Thread starter fastblast2
- Start date
The injector has been said to mix 20:1. If you pre-mix 32:1, I'd bump the main jet up a size to be safe.
I thought the more oil you mix, the less gas there would be so you would need a bigger main to deliver more gas. Goin from 20:1 to 32:1 would be less oil and more gas so if anything it would call for a smaller main ( theoretically ).
This is correct in theory, BUT, remember that the oil injection system on a Blaster feeds oil into the carburetor upstream of the venturi. In other words, the oil mixes with the fuel after the fuel has come past the main jet.
SO, with oil injection, only straight gasoline flows through the carburtor's main jet. But once you go to pre-mixing your fuel, you'll now have gasoline AND oil flowing through the main jet, so you have to bump up the main jet at least one size to compensate for the oil that now must pass through it.
/\ /\ /\ /\ What he said.
If you change from injection, to pre mix, you should increase the size of the main jet.
Adding oil lessens the gas content.
If you change from injection, to pre mix, you should increase the size of the main jet.
Adding oil lessens the gas content.
Gotchaa ... I did not know that was how the oil injection worked, after you explained that part to me it makes complete sense. Thanks for the good information and helping me learn somethin new, have some rep bro !
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