Originally Posted by racroom
Can anyone tell me the best way to adjust an alcohol injection system. Also the best way to tell if the barrel valve is adjusted right.
Thanks
Ray :?
You didn't say if you're running stacks or a hat????,
But the initial setting for stacks on the leakdown is 24lbs./% on a hat it should be set at 30lbs/%, and you adjust down from there, we're running stacks on (4) 434"'s and a toilet bowl on another engine and all the setting vary a little, but most run good at 21 PSI/% leakdown, my bowl runs best at 18 PSI/%. I start with the initial setting and adjust down until the idle is right and when the throttle is cracked there's no stutter. In fact a lot of times i don't even use the leakdown tester. In a day 40 yrs. ago we didn't know what a leakdown tester was. Now if you're running blown that's a totally difference animal
A lot of people make the mistake of not running an idle bypass valve, that's what the hole in front of the barrel valve is for. The by-pass valve comes with a 15lb spring and as soon as you crack the throttle at 15% it closes off the by-pass hole in the barrel valve, same as a hat. Most of the pumps produce 100PSI at 4000 pump RPM. The larger the pump IE 80A vs 110 the 110 has more volume but can easily be run but will require a larger return pill. I run the 110 on my blown alky motor, but DSR's on the stacks.
Really need more imfo on what your system is, stacks,hat,bowl, pump size nozzle size, cu.in.
Just my opinion
Zip.