BUSCHUR RACING

EVO 8/9 DOUBLE-PUMPER

Buschur EVO 8/9 EVO Double Pumper ReviewBuschur Racing has always taken a no-nonsense, no-frills approach to performance. The extremely affordable EVO 8/9 “Double-Pumper” solution is no exception. Combining a pair of modified Walbro GSS340 pumps in a modified stock hanger gets the job done. A modified hat with 3/8-inch barbed fittings allows for twin -6AN lines to feed the fuel rail. Alternatively, a step-up Y-fitting can be used to combine the twin -6AN lines into a single -8AN line. On the flow bench, the system performed very well. The modified pumps showed some of the least flow loss as operating pressures were increased. Feeding fuel to a 750+whp 4G63 running 35psi of boost pressure should be no problem for this setup. A core exchange is required.


SPECS

MANUFACTURER:  Buschur Racing
PART NUMBER:  EVO-4009
DESCRIPTION:  Double Pumper for EVO 8-9
VEHICLE APPLICATIONS: 2003-2006 Mitsubishi Evolution VIII and IX

NUMBER OF FUEL PUMPS: 2
FUEL PUMP MANUFACTURER: Walbro
FUEL PUMP PART NUMBER: GSS340 28912-1

FUEL PUMP INLET TYPE: Snap Fit Stock
FUEL PUMP OUTLET TYPE: 5/16″ / 8mm
FUEL HAT OUTLET #1: 3/8″ / 9.5mm
FUEL HAT OUTLET #2: 3/8″ / 9.5mm (-6AN Optional)
FUEL HAT RETURN #1: 1/4″ / 6.4mm
E85 Compatible (Y/N): YES

MSRP: $515.00


Buschur EVO 8/9 EVO Double Pumper Review

FUEL CURVE SLOPE -29lph/10psi @ 12.5V | -37lph/10psi @ 14.0V

Boost Pressure 0 5 10 15 20 25 30 35 40 45 50 55
Operating Pressure 45 50 55 60 65 70 75 80 85 90 95 100
Flow (lph) 12.5V 375 361 347 334 319 303 290 276 260 245 229 213
Amps 12.5V 18.0 19.0 19.8 20.6 21.4 22.6 23.2 24.2 25 26.2 27 27.8
WHP (gas) 12.5V 1002 965 928 893 853 810 775 738 695 655 612 569
WHP (E85) 12.5V 771 745 713 687 656 623 596 567 535 504 471 438
Flow (lph) 14V 444 427 412 398 379 368 353 339 327 311 296 280
Amps 14V 20 20 21 22 23 24 25 26 27 27 28 29
WHP (gas) 14V 1187 1141 1101 1064 1013 984 944 906 874 831 791 748
WHP (E85) 14V 913 878 847 818 779 757 726 697 672 639 609 576
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