February 3, 200521 yr 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
February 3, 200521 yr 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.
February 3, 200521 yr 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.
February 4, 200521 yr Author 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.
February 4, 200521 yr 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.
February 4, 200521 yr Author 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.
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now