Recent content by 454Suburban

  1. 4

    Few A/C questions.

    R134a requires PAG oil, I used PAG 150 on my 92 pickup conversion. As far as the condenser, you need a parallel flow type. The orifice tube for your 89 should be in the lower tube on your evaporator, thats where my 91 suburban is. For my 92, it called for 8 oz. oil. 4 in the suction side of...
  2. 4

    A/c rebuild

    Yes, you do need to vacuum the system. Also, if the system was originally R12, you will want to replace the hoses with "barrier" type if going to 134a. I also replace the condenser coil with a parallel flow type. Clean your evaporator coil while the system is open. There are a few cleaners on...
  3. 4

    High Flow Cat recommendations

    Was looking for some feed back on a high flow cat for my 91 suburban. I got a .040 over 454 long tube headers and going into a single 3" exhaust. Any info, experience would be appreciated.
  4. 4

    95 Tbi to 98 454 vortec motor

    I swapped a Mark IV BB into my 91 suburban that had a 350. fairly straight forward. it had a 4l80, so crossmember was fine. Headers are a PITA, finally got a set of tri-Y's to fit. I went to a dynamic EFI for tuning and a stand alone trans controller. I also made flex stainless fuel lines going...
  5. 4

    1995 454 TBI questions

    Not with a factory TBI unit.
  6. 4

    1995 454 TBI questions

    I recently started up my BBC in my 91 3/4 ton suburban. Its a Mark IV block, .040 over, 9.1 compression, 98 Vortec heads, lunati voodoo 60201 cam, edelbrock dual plane intake and thorley tri-y long tube headers. Its running a smoothed BB TBI new injectors, and AFPR. I'm also running Dynamic EFI...
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