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Re: What size injectors for a 50-trim??
The Walbro 190 might work. It will depend on the boost pressure, fuel pressure and HP being made. At a base fuel pressure of 40psi + 30psi of boost a Walbro 190 @ 13.5 volts will flow around 38 gal/hr. 660cc injectors can supply around 42 gal/hr of fuel maxed out, so they max somewhat near each other. A really good 50-trim setup on race gas and high boost would be able to max both 660s and the 190 pump though, but most people won't ever do that.
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