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305 engine... performance?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by rcknpimp, Nov 1, 2002.

  1. rcknpimp

    rcknpimp Registered Member

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    i have the 305 in my 86' blazer. lookin for more performance than exhaust and intake. is it worth tearing down the whole motor to redo or is it just headaches? or does it have enough oph to haul around the 4400lb beast with 35" tires? lookin for suggestions on what i should do. thanks.
     
  2. k5ntexas

    k5ntexas 1/2 ton status

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    you can get some more stuff for yer 305 but its not worth it imho. it would be best just to get you a 350 and do some work to that engine. you will like it that much more. later.

    jacob
     
  3. Goober

    Goober 1/2 ton status

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    Sure, you could rebuild your 305 and get a little more power from it ..... but why bother? Parts are gonna cost a little more and when everything is all said and done you won't be much better off than you are now.

    Why not avoid all the headaches and just get a Good engine right off the bat?



    BTW: Welcome to CK5!
     
  4. SkulzNBonz

    SkulzNBonz 1/2 ton status

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    Intake, headers, and maybe a mild cam are about all that a 305 is worth. Mine was rebuilt by the previous owner (dumba$$), but after a new intake and ripping all the emissions equipment off of it, it makes decent power.

    John
     
  5. bryguy00b

    bryguy00b 3/4 ton status

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    hell for that price i would just go out and buy me another truck!!
     
  6. HarryH3

    HarryH3 1 ton status Author

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    Look for recent posts by trouble1. He just swapped the cam in his 305 and is VERY happy with his new found performance. /forums/images/graemlins/thumb.gif
     
  7. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Don't downplay the performance you'll gain from just an intake/exhaust upgrade. My 305 is basically stock- all I've done is rip out the emmisions crap and install a distributor recurve kit. I also run a 2 1/4" dual exhaust with Dynomax Super Turbo mufflers out of the factory exhaust manifolds.

    I can honestly say that the exhaust upgrade made a huge difference in both performance and mileage. If you don't have a lot of cash to spend, you might consider redoing the exhaust. The big bonus is if you ever upgrade to a 350, the same system will bolt onto your new engine.
     
  8. Kamots

    Kamots Registered Member

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    Just a thought but check out a stroker kit for it. http://www.enginekits.com/ chek that out.....worthy me thinks of a try, imma do it in the spring. Do the math on it an it will prove to put out more than an prevortec 350 easy.

    Kamots /forums/images/graemlins/wink.gif
     
  9. wrathORC

    wrathORC 1/2 ton status

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    Do a search on it.

    You can squeak 250 horses out of a 305 without much effort. And you won't be paying $3700 for a 383 as suggested by someone else. Some people like me don't have $3700 to blow on a motor. That's a semester's tuition for me. And for $3700 you can build a killer bigblock so it doesn't take a rocket scientist to figure out that a off-the-shelf motor isn't the best bang for your buck.
     
  10. rcknpimp

    rcknpimp Registered Member

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    what emmisions crap can i take off? other than the cat. thanks again
     

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