Difference Between Xri And Efi Merc

[JUPITER PULSARE]

WHAT IS THE DIFFERENCE BETWEEN A 3 LITRE MERC 225 XRI AND A 3 LITRE MERC 225 EFI. IS IT ONLY A NAME CHANGE OR ARE THERE MODIFICATIONS AND UPGRADES ON THE XRI MOTORS? IF SO, WHAT ARE THEY?

[Tony Brucato]

Just a name change. All the same inside.

[JUPITER PULSARE]

HEY TONY, WHAT ARE SOME OF THE BEST UPGRADES THAT CAN BE DONE TO THIS MOTOR WHILE KEEPING THE RELIABILITY FACTOR HIGH?

[Tony Brucato]

Check out http://brucatosvs.com/3litre.html for information on the Brucato SVS and High Flow Reed Plate for that motor.

If you've got the early style 3 litre 225 with only 2 butterflies in the airbox, we can add 31 HP with just the SVS!!!! and another 8 HP with the High Flow Reed Plate.

Click here for the dyno sheet test results (http://brucatosvs.com/3l_chart.html)

The SVS system for that motor works on a progressive linkage and only operates above 80% throttle position. You can still retain your oil injection, good idle, and cruising economy below that throttle position. At W.O.T. it improves from holeshot to topend speed.

A cheap but effective modification you can do right away is to ventilate your engine cowl. You may pick up 100-150 RPM from this alone. Just use 1/2" longer screws and spacers to lift the fake louvers on top of your cowl. You'll also need to take a hole saw to the inner liner of the cowl to let fresh air in.
Try it, it works.

[JUPITER PULSARE]

HEY TONY, THANKS FOR THE REPLY AND GREAT INFO. NOW I JUST HAVE TO SAVE SOME$$$ OR WAIT TIL SANTA!!!:) :)