With the JRSC you have both heat and (depending where you live) bad gasoline to contend with.
I think you should first treat for heat. Put the jet as far away from the dummy TB as possible and reduce temps. That will help with detonation by reducing intake temps and depending on how much you end up injecting there may be some left over for the combustion chamber too.
Some people have been injecting before the sc with M45s with good results as well. They claim it helps seal the rotors in addition to cooling the unit. I would leave this to subsequent experimentation, though. YMMV etc.
As far as injecting at the manifold I have seen recommendations of about 3 inches from the inlet being a good point for decent dispersion to the cylinders. I plan on using WI for a non-intercooled FM turbo and will have two jets: one at the tb for detonation adn one right after the turbo for cooling.
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Robbi Laurenson - System 2c
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