for those that know holley projection. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

trailwart · 06-12-2008, 03:14 AM

i bought 2 used systems last week off the net. now that i have both systems here and comparing them, i noticed a difference in the fuel controllers.the 1 has 2D on it and the other has holley fuel controller and is alot bigger in size. both tbi units have the same #s stamped on them and the fuel pumps are also the same as all the sensors and harness. the 2D controller has the plug for the o2 sensor and the other unit does not. is the bigger unit an older analog controller and the 2D digital? here is a pic. thanks

06-12-2008, 03:14 AM	#1
trailwart Registered User Join Date: Mar 2003 Location: michigan Posts: 356	for those that know holley projection. i bought 2 used systems last week off the net. now that i have both systems here and comparing them, i noticed a difference in the fuel controllers.the 1 has 2D on it and the other has holley fuel controller and is alot bigger in size. both tbi units have the same #s stamped on them and the fuel pumps are also the same as all the sensors and harness. the 2D controller has the plug for the o2 sensor and the other unit does not. is the bigger unit an older analog controller and the 2D digital? here is a pic. thanks __________________ 72 chevy 3\4 ton 4 speed 4x4 84 1\2 ton 4x4 (gone but not forgotten, thanks for the memories) 1999 suburban 4x4 1982 chevrolet S-10 V-8 (Thanks uncle EARL)



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