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#10 | |
Registered User
Join Date: Oct 2003
Location: OC CA
Posts: 1,374
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Re: Tbi swap build thread
Quote:
2) SBC and BBC harnesses are nearly identical with few exceptions: a) BBC used different IAC motor and connector is different - four wires. b) TPS may be different, early BBC used lever style TPS adjustable, while later used throttle shaft style - similiar to cars. Different connector. c) Some HD BBC did not use knock sensor (KS) and ESC modules - these engines used 1228747 ECM and can be positively identified by broadcast code printed on ECM label (four letter code). 2-1) You'll have to use 454 TBI ECM with your swap to keep things easy. In general 1227747 ECM (when loaded with appropriate BCC EPROM) was used with V6 (4.3L) and 305/350 SBC V8 and some 454 BBC. The 1228747 ECM has identical harness interface minus KS functionality for HD application. You can swap out your SBC 7747 ECM for 8747 when you perform the swap. Other than aforementioned points 2a and 2b SBC harness is good to go. //RF
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"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) |
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