PA 28-160 thru 181
STC's for PA-28-140, -150, -151, -235 do not require changes to the fuel pumps or plumbing and sell for $1.50 per hp. STC's for the PA-28-160 -161, -180, -181 require modifications to the fuel system per STC SA2660CE. If you have a PA-28-140 that has been converted to a 160hp engine, then it will require the fuel system mod as well.
The Warrior II and Archer II and the 24 volt Warrior III and Archer III series are approved via STC SA2660CE for the use of 91 octane (minimum) automotive fuel. Piper Cadets are included too, the Piper Arrow however is not.
STC SA2660CE applies to the following aircraft serial numbers:
Cherokee, PA-28-160, PA-28-180
28-1761 thru 28-5859
28-7105001 thru 28-7505261
Warrior II/Cadet PA-28-161
28-7716002 thru 28-8616057
2816001 thru 2816105
(Except 2816066)
2841001 thru 2841364
(Except 2841351 thru 2841359)
Archer II PA-28-181
28-7690001 thru 28-8690056
2890001 thru 2890205
Warrior III, PA-28-161
2816110 and on
2842001 thru 2842108
2842109 and on
Archer III, PA-28-181
2890206 and on
2843001 thru 2843414
2843203 and on
The fuel system mod for PA-28's consists of minor fuel system mods aft of the firewall and a totally redesigned fuel system forward of the firewall. The Piper installed electric pump is removed and replaced with a pair of redundant electric fuel pumps. You may run one pump or the other but when properly wired it is impossible to run both pumps at the same time. The FMS calls for one of the pumps to be activated for taxi, takeoff, climb, landing, and again for taxi. You may run them in cruise if you wish but it's not necessary to do so. The fuel system plumbing forward of the firewall consists of steel and stainless steel tubing and fittings. The tubing is bent to shape in our shop and comes to you attached to the pumps as an assembly ready to be tightened up and mounted on the firewall when you receive it.
The Warrior III and Archer III use the same pumps and plumbing as the 12 volt models however the Warrior III and Archer III being 24 volt, require additional parts and therefore more time for installation. A pair of voltage converters are used to drop the power to 12 volts for the fuel pumps. This was done to avoid having to conduct additional hot fuel tests which would have been necessary if we had opted for a 24 volt pump. The voltage converters are mounted aft of the baggage compartment on a bracket that is attached to the floor and left side of the fuselage. Wiring looms (completed in our shop) are installed in the left side of the fuselage to carry power forward to the fuel pumps, toggle switch, and circuit breakers.
If your airplane uses an electrical priming system you will still be using it but the procedure for doing so will be slightly different.
The 12 volt version of this STC requires six hours to eight hours to install. The 24 volt version for the Warrior III and Archer III takes from ten to twelve hours to install.
Be advised that the price of these systems may be higher in countries other than the United States and that these prices do not include shipping. Figure 7 lbs from zip code 68959 in the United States.