Mike386 Posted February 3, 2005 Share Posted February 3, 2005 88 GL MPFI turbo and non-turbo, are the blocks the same compression ratio? If not, can I just transfer the intake and wiring from the turbo to the non-turbo and leave off the turbo?:-\ -Mike Quote Link to comment Share on other sites More sharing options...
85Sub4WD Posted February 3, 2005 Share Posted February 3, 2005 NO, difft compression ratio, wiring, everything. You would get REALLY lousy performance if you converted a turbo block to N/A b/c turbos have a 7.7:1 CR and non-turbos have a 9.5:1 CR for that year. Quote Link to comment Share on other sites More sharing options...
archemitis Posted February 3, 2005 Share Posted February 3, 2005 the block(namely pistons) is what gives the turbo the lower compression. you could stick a na motor in there and run it without the turbo... good luck finding a y pipe. the computers are the same afaik. Quote Link to comment Share on other sites More sharing options...
Mike386 Posted February 4, 2005 Author Share Posted February 4, 2005 the computers are the same afaik... afaik? How about the intake manifold and the injectors, are they the same between the turbo and n/t? the block(namely pistons) is what gives the turbo the lower compression. you could stick a na motor in there and run it without the turbo... good luck finding a y pipe. the computers are the same afaik. Quote Link to comment Share on other sites More sharing options...
85Sub4WD Posted February 4, 2005 Share Posted February 4, 2005 If the non-turbo is SPFI, then EVERYTHING is different (c'ept block, crank, and piston rods) If the non-turbo is MPFI, then should be *similar* - I know in 85/86 models, the computer knew whether or not it was a turbo by grounding/leaving open a pin on the ECU. Quote Link to comment Share on other sites More sharing options...
Mike386 Posted February 4, 2005 Author Share Posted February 4, 2005 Cool, I have a 85 mpfi eng (the block is almost like new) that i'm dropping into an 88 (former spfi) GL Wgn AND I just came across an 88 mpfi turbo wgn and I figured the 88 GL manifolds, wire harness, and computer would work better in my 88. If that makes any sense... there are some wiring differences between 85 and 88. If the non-turbo is SPFI, then EVERYTHING is different (c'ept block, crank, and piston rods) If the non-turbo is MPFI, then should be *similar* - I know in 85/86 models, the computer knew whether or not it was a turbo by grounding/leaving open a pin on the ECU. Quote Link to comment Share on other sites More sharing options...
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