June 23, 200520 yr What years used the throttle body injection and what used multipoint? Advantages, disadvantages, opinions? I need good gas mileage for commuting, but I also do some offroading. Thanks.
June 23, 200520 yr well i think all legacy's have multipoint and all loyales from 87' ,or whenever they started, up thru like 91. but i think after about 92'-93' all SPFI were replaced with the MPFI, MPFI has better control over fuel dispersal per cylinder than SPFI, obviously, and gains you fuel mileage as well as a few ponies to boot. if you want fuel injection but dont want a ton of computer stuff to go along with it, use SPFI, vice versa apllies. but if you want more power and beeter gas mileage and a little more power go with MPFI. hope this helps. ~Josh~
June 23, 200520 yr MPFI only came on "premium" cars, all turbo, and some XT's all XT-6's I don't know about RX's but a good rule of thumb is that if its not carby, its probably a SPFI.
June 23, 200520 yr SPFI - 86-94 L-series. Not all, but most (except 86 and 87, which still had a number of carbed cars) MPFI 85 L-series wagon (rare) and some various years of XTs (N/A), all EA82 turbo cars. All legacy and newer subarus. Also, all of the turbo cars are MPFI. No dual range MPFI cars that I am aware of, except the RX, which has a little differend DR than the others and is turbo.
June 23, 200520 yr SPFI - 86-94 L-series. Not all, but most (except 86 and 87, which still had a number of carbed cars)MPFI 85 L-series wagon (rare) and some various years of XTs (N/A), all EA82 turbo cars. All legacy and newer subarus. Also, all of the turbo cars are MPFI. No dual range MPFI cars that I am aware of, except the RX, which has a little differend DR than the others and is turbo. Any EASY way to put SPFI or MPFI on a older D/R vehicle. Is it worth it?
June 23, 200520 yr SPFI is easiest. The SPFI and hitachi 2brl carby intake manifolds user the same heads. MPFI would require swapping heads. SPFI uses less wiring too.
June 23, 200520 yr Why not just find an MPFI car and drop a d/r tranny in it like Dennis did with his XT? I don't know if I'd take a turbo offroad though. If you're interested I have an MPFI nonturbo RX 3-door with a d/r FT4WD tranny, locking diff, rear LSD
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