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rfmaster · 03-05-2013, 01:14 AM

For 87 to 90 BBC TBI GM used a stock pile of cast iron (CI) Q-jet intakes with the well known plumber delight adapter plate. For 91 to 95 GM switched to aluminum intake. Aluminum heats up faster and it was a dedicated intake for Gen 5 BBC. Rumor has it that GM had a stockpile of Q-jet intakes and when they could not emission certify BBC with a carb for 87+ models they went with a bigger TBI on top of Q-jet intake.

//RF

03-05-2013, 01:14 AM	#3
rfmaster Registered User Join Date: Oct 2003 Location: OC CA Posts: 1,374	Re: tbi intake question For 87 to 90 BBC TBI GM used a stock pile of cast iron (CI) Q-jet intakes with the well known plumber delight adapter plate. For 91 to 95 GM switched to aluminum intake. Aluminum heats up faster and it was a dedicated intake for Gen 5 BBC. Rumor has it that GM had a stockpile of Q-jet intakes and when they could not emission certify BBC with a carb for 87+ models they went with a bigger TBI on top of Q-jet intake. //RF __________________ "The Beast" 1975 Chevrolet C20 longbed 350/700R4! with 3inch body lift Dual Flowmasters Super 40's! TBI retrofit completed (2007-07-29) New 383CID (+030) 08-304-8 9.5:1CR x36,005 (2012-12-17)