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  1. 4.3 Octane Requirement

    262ci Forum (4.3)
    I have a '92 Blazer with a re-built CPI 4.3. Can it run/idle well enough on regular grade gas without having to use premium?
  2. New System

    Exhaust
    About my earlier post: I was going to get a Dynomax Super Turbo muffler (2.25/2.5) and put a turndown on the muffler outlet. Would this be loud as ****?
  3. EGR Mod

    262ci Forum (4.3)
    What is this EGR modifcation everyone talks about? Does it work on old 4.3s? Say a 92 CPI?
  4. Port and Polish or New Heads?

    262ci Forum (4.3)
    If I get the heads ported, do I have to change anything else on the motor?
  5. CPI vs TBI

    262ci Forum (4.3)
    What is the difference in power and torque between the two setups? Can a CPI be changed to TBI?
  6. Port and Polish or New Heads?

    262ci Forum (4.3)
    I have a 92 4.3 CPI. Would I notice any significant difference in power? What are the flow numbers? Or are there newer sets of heads than can be bolted on?
  7. 2.8 TBI swap to a 4.3 CPI

    262ci Forum (4.3)
    I agree with the guy that you talked to. As far as what year of 4.3, I would stay within a year of the truck's model year. I have a 92 Blazer with the 4.3 CPI. I can tell you that with the 4.3-especially the CPI version-, it goes pretty good for a 2-ton SUV. I've seen my year's CPI rated...
  8. K & N Fipk

    262ci Forum (4.3)
    I saw on K&N's site a kit (part # 57-3009) that was for an S-10. But it says it fits 94 and 95. It looks to me like it would work on the CPI setup, even if I have a 1992. What do you think? 1- www.knfilters.com = FIPK section 2- FIPK Information by part number page (part # 57-3009) I also...
  9. 92 4.3 CPI Performance!!

    262ci Forum (4.3)
    Is there anything out there that can boost power on a 92 4.3 with the CPI setup? I definitely don't want to tear the motor apart.
  10. 95 4.3 tbi engine power

    262ci Forum (4.3)
    The TBI 4.3 puts out 150-160 hp. Torque rating is 230 or 235 [email protected] The TBI seems to be better for low-end torque than the CPI setup because I looked at the CPI specs. The CPI makes 260 lb-ft of torque, but at 3600 rpm.
  11. How much boost can 4.3 handle safely

    Blowers and Bottles
    my '92 motor IS the CPI. It already had 25,00 on it when I got it. I've put another 5,000-7,000 miles on it in the last year. This sucks. Nothing for OBD I.
  12. A possible exhaust setup

    Exhaust
    If I put the headers on, do I have to get a new chip?
  13. How much boost can 4.3 handle safely

    Blowers and Bottles
    hellbent, My engine is a '92 4.3 CPI with about 32,000 miles on it. Is this fresh enough to run about 9 or 10 pounds of boost?
  14. A possible exhaust setup

    Exhaust
    What are the stock sizes for the exhaust? IS there some muffler with a single inlet and dual outlets that will work? With what I have in mind, will I get a big boost in power or will I actually lose power? Thanks a lot.
  15. A possible exhaust setup

    Exhaust
    I have a '92 S-10 Blazer with the 4.3 CPI. I found Edelbrock headers on expressautoparts.com for around $390. Is this a good mod for the buck? About how much power should it add? I also spotted a Dynomax Super Turbo muffler for $46. Is there a better muffler? They're both 2.5" diameter. If...
  16. Do I have a.....

    262ci Forum (4.3)
    I don't see why it wouldn't be a vortec. I have a '92 Blazer S-10 with the 4.3. The 4.3 in mine is a Vortec, but it has the CPI setup.
  17. How much boost can 4.3 handle safely

    Blowers and Bottles
    With and without intercooling, how much boost can the 4.3 handle? Is it possible to add the supercharger without tearing apart the engine? I heard that the 4.3 can handle up to 350 hp without internal modifications. Is this true?
  18. More power from 4.3

    262ci Forum (4.3)
    How much are the heads?
  19. Hesitation/Stumble

    262ci Forum (4.3)
    I think around the 94 or 95 model year was when a lot of car makers were changing from OBD I to OBD II. I know around that time dealers seemed to be getting 94s and especially the 95s in for all kinds of problem related to OBD II. This is a longshot, so I wouledn't think that could be the main...
  20. truck skips at startup

    262ci Forum (4.3)
    It sounds like a misfire.
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