' switching from gasoline to methanol in the same engine typically adds 8-12% to mid-range torque in un-optimized engines.'
That is an interesting statement. Do you believe my engine is unoptimised ?
What I would point out is that in methanol fuelled engines at 12 to 1 compression, it is common practice to use Amal X and Y needles so that the fuel metering is actually done by the main jets at full throttle. This usually means that from one-third throttle to three quarters throttle, the jetting is too rich to give best performance. Because I am using low comp the jetting is leaner right across the whole range of throttle openings, so I can use petrol needles to give really lean midrange without obstructing the mains at full throttle. The way around the problem if you are using 12 to 1 comp. is to recess the needle jets about 3mm. That way the tip of the needle is still trapped yet the main jets are not obstructed near full throttle and you can use petrol needles to give the necessary lean midrange.
That is an interesting statement. Do you believe my engine is unoptimised ?
What I would point out is that in methanol fuelled engines at 12 to 1 compression, it is common practice to use Amal X and Y needles so that the fuel metering is actually done by the main jets at full throttle. This usually means that from one-third throttle to three quarters throttle, the jetting is too rich to give best performance. Because I am using low comp the jetting is leaner right across the whole range of throttle openings, so I can use petrol needles to give really lean midrange without obstructing the mains at full throttle. The way around the problem if you are using 12 to 1 comp. is to recess the needle jets about 3mm. That way the tip of the needle is still trapped yet the main jets are not obstructed near full throttle and you can use petrol needles to give the necessary lean midrange.