Originally Posted by
Phil2002
A few years ago i made my own by putting an oil pressure light switch in the cross over pipe(switched a 15 psi) and wired it to a relay and then to the 5th injector so at 15psi the 5th injector would open. not ideal but it worked and cost me under a tenna and took about 20 mins to do.
if you done it like this what voltage injector do you use, is it just wired 12v from an ignition live to relay then onto a injector ?