Post
autor: Lena » wt sty 12, 2010 3:00 pm
takie możecie mieć silniki:
How to identify your 4.3L
These 4.3's are 90 degree even-fire engines, with a 1-6-5-4-3-2 firing order. All have overhead valves, with two valves per cylinder. Cylinders are: 1-3-5 (Driver's side front to back) 2-4-6 (Passenger side front to back)
The VIN engine digit is the 8th in the code. RPO list is in your glovebox.
VIN Z, RPO LB4:
Throttle Body Injection (TBI). Manufactured from 1988-1995. Was the first 4.3 used in the S-series. Manifold setup is similar to a carberated engine. The TBI unit looks like an electronically regulated carberator and the air filter sits directly on top of it. It has two injectors in a pod above the throttle plates. Injectors are batch-fired.
155 to 165 hp, 235ft/lbs
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NOTE:The 4.3L in the Syclones/Typhoons is also VIN Z, LB4. The block and cylinder heads are the same as the LB4 TBI, with the exception of lower-compression pistons and nodular iron main caps. Boost is provided by a Mistubishi TD06-17C at 550 CFM. Fuel injectors and throttle body are borrowed from L98 Corvette/F-body V8's. The fuel injectors are fed through fuel rails and are batch-fired.
280hp, 350ft/lbs in 1991-1992.
290hp, 360ft/lbs in 1993 Typhoons.
VIN W, RPO L35:
Central Port Injection (CPI/CMPI). Manufactured from 1992-1995. It has central injection assembly mounted in the intake manifold which uses a single batch-fired injector feeding 6 poppet nozzels located at the intake ports. It has a dual-plenum manifold (upper and lower) with variable tuning with a manifold tuning valve to equalize pressure. The manifold looks much like that of an LT1, the throttle body is at the front of the manifold and goes to an intake tube with a filter box behind the left headlight. Vortec is written in orange on top of the plenum, which is black or aluminum colored.
190 to 195hp, 260ft/lbs
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VIN X, RPO LF6:
Central Sequential Fuel Injection (CSFI), Sequential Fuel Injection (SFI).Manufactured from 1996 to 1999. CSFI uses six individual injectors and a fuel pressure regulator that pulses fuel through six orifices through flexible nylon tubes. These tubes run to poppet valves at the intake ports. Manifold setup is similar to TBI, except it has one bore and one throttle blade. Air filter box is located behind driver?s side headlight.
175hp, 240ft/lbs (2wd pickups), 180hp, 245ft/lbs (4x4 pickups)
VIN W, RPO L35:
Central Sequential Fuel Injection (CSFI), Sequential Fuel Injection (SFI). Manufactured from 1996 to 2003. This engine is similar to the VIN X, RPO LF6 except for increased hp and torque. The only likely difference is computer programming.
180hp, 245ft/lbs (2wd pickups), 190hp, 250ft/lbs (Blazers and 4x4s)
co z tego wynika - to, że wszystkie silniki od 96r są na pełnej sekwencji a do 96 mogą być na fullgrupie a nawet na TBI.
aluminiowa pokrywa dolotu z przepustnicą skierowaną w stronę chłodnicy = fullgrupa
plastikowa obudowa dolotu z przepustnicą skierowaną ku górze = sekwencja
to najlepiej go zdjąc i nawiercic z boku dysze na wtryski. Ja u siebie wstepnie mialem pociagniete rurki przez ten plastik ale to tylko problemy przynosilo. Lena mi poprawila i teraz jest git. 
