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is this considered a good 305 if there is such a thing

Discussion in 'The Garage' started by bryguy00b, Jan 6, 2004.

  1. bryguy00b

    bryguy00b 3/4 ton status

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    305 .030 over 400 Crank KB186 pistons Molly Rings 400 Harmonic balancer new timing chain/cover Comp Extreme 4x4 cam 226/234 dur. 480/498 lift Heads-"041" castings K-motion springs, studs pinned, 1.94/1.60 valves, Crane-1.6 stamped rocker arms (increases lift to 512/531) Edelbrock RPM Air-Gap intake Edelbrock 600CFM carb Petronix "Flame thrower" HEI upgrade Accell 8.8 wires
     
  2. Confedneck

    Confedneck 3/4 ton status

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    i have one question.. why bore a 305 when you can do all that, for the same price, to a 350.. and build more power?
     
  3. bryguy00b

    bryguy00b 3/4 ton status

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    i dunno..its the moter in a truck thats in the classifieds on our 4x4 club page..77 chevy with 1 tons, 465, 205, 4" lift...guys wants 2300 for it..of course the 4 speed is not origional, and has not even been put in the truck yet...good progect though..and its got the right stuff..
     
  4. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    Wow, thats a pumped little motor! /forums/images/graemlins/eek.gif I bet it makes some good power around and above 4,000RPM. That motor would be perfect for my future sand/mud truck with 33" boggers. /forums/images/graemlins/thumb.gif /forums/images/graemlins/wink.gif I would get it, even though it's a 305 block...it's still like a 334ci or something with the 400 crank and probably makes some decent torque and some good HP with that cam.
    Don't let anyone discourage you...thats a hot little motor!
    But I do agree guys, it would be better with a 350 block...but still. /forums/images/graemlins/wink.gif /forums/images/graemlins/tongue.gif
     
  5. lukebaby1

    lukebaby1 1/2 ton status

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    The problem with the stock 305 was that the heads were so small. Chevrolet did this to promote fuel economy, but it really never did that much, other than make the motor a wimp with about 150HP stock. It still drank fuel like its big brother 350. From the looks of it this person has done some extensive head work, and may have even used heads from a 350. You might ask if they are, and get some more info on them. There in is where your ponies exist. With the big lift their showing, it should produce around 250-280HP, maybe even higher. The only other thing drawback would be the two bolt main bearing caps, which will limit sustained high RPM operation. /forums/images/graemlins/grin.gif
     
  6. 84_Chevy_K10

    84_Chevy_K10 Banned

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    [ QUOTE ]
    which will limit sustained high RPM operation. /forums/images/graemlins/grin.gif

    [/ QUOTE ]

    Tell that to my buddy where his Nova has hit 7,000 many times over the last three years he's had it built.
     
  7. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    [ QUOTE ]
    and may have even used heads from a 350. You might ask if they are, and get some more info on them. There in is where your ponies exist. With the big lift their showing, it should produce around 250-280HP, maybe even higher. The only other thing drawback would be the two bolt main bearing caps, which will limit sustained high RPM operation. /forums/images/graemlins/grin.gif

    [/ QUOTE ]
    I bet that motor is making a few more ponies than that! probably over 300HP with that cam and 400 crank. It obviously has 350 heads on it because it has the bigger 1.94 valves.
     
  8. bigburban383

    bigburban383 1/2 ton status

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    Is it a 4.00 x 3.25 305 or a 3.875 x 3.47 305?
     
  9. bryguy00b

    bryguy00b 3/4 ton status

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    uhh..no clue what ya mean there...ill have to get back to ya lol..
     
  10. 6.2Blazer

    6.2Blazer 1/2 ton status

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    I kindof think the same, but maybe the guy already had a good 305 laying around???

    My bro-in-law had an early '90's Camaro with a stock TPI 305 in it and was a strong running car. It had some pretty meaty tires on the back and a posi but could easily smoke the tires upon command.
     
  11. 84_Chevy_K10

    84_Chevy_K10 Banned

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    [ QUOTE ]
    Is it a 4.00 x 3.25 305 or a 3.875 x 3.47 305?

    [/ QUOTE ]

    Uh, 4.00 x 3.25 is a 327. /forums/images/graemlins/rotfl.gif
     
  12. BowtieRed

    BowtieRed 1/2 ton status Author

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    actually the 2 bolts are better if they are splayed to 4. more webbing.

    atleast that's true of 350s.
     
  13. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    [ QUOTE ]
    Is it a 4.00 x 3.25 305 or a 3.875 x 3.47 305?

    [/ QUOTE ]
    probably a 3.875x3.47. With it .030 over that would be 3.905 x 3.76. That yields a 360.26 CID small block stroker. /forums/images/graemlins/eek.gif Sounds pretty good to me! /forums/images/graemlins/thumb.gif
     
  14. BowtieRed

    BowtieRed 1/2 ton status Author

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    um, a 305 0.030 over is a 310.
     
  15. SUBFAN

    SUBFAN 1/2 ton status

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    Um you did not account for his 3.76 stroke....

    By the way, where did you guys get 3.47 and 3.76" strokes????

    Bore x bore x stroke x no. of cyl. x .7854....
     
  16. Beast388

    Beast388 1/2 ton status

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    [ QUOTE ]
    [ QUOTE ]
    Is it a 4.00 x 3.25 305 or a 3.875 x 3.47 305?

    [/ QUOTE ]
    probably a 3.875x3.47. With it .030 over that would be 3.905 x 3.76. That yields a 360.26 CID small block stroker. /forums/images/graemlins/eek.gif Sounds pretty good to me! /forums/images/graemlins/thumb.gif

    [/ QUOTE ]

    Ugh....bore & stroke info for SBC's is all over the internet. A stock 305 is 3.736 bore & 3.48 stroke. 0.030" over and a 3.75" stroke would net you 334.2 CID.
     
  17. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    I thought his bore&stroke numbers were a little strange when I punched them into the formula /forums/images/graemlins/thinking.gif 360ci is a lot out of a 305 block. /forums/images/graemlins/eek.gif
    [ QUOTE ]
    I would get it, even though it's a 305 block...it's still like a 334ci or something with the 400 crank and probably makes some decent torque and some good HP with that cam.


    [/ QUOTE ] I should have stuck with my first thought. /forums/images/graemlins/ignore.gif
     
  18. 88Silverado

    88Silverado 1/2 ton status

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    If you noticed that engine has 041 Camel Hump Heads. Those were/are a good HP head found on older trucks. Thats a pretty nice setup for a 305.

    "041" – 3947041, also 3947041X. A good performance head. They were found on 1969-1970 302 and 350 engines. They had either 1.94/1.50" or 2.02/1.60" valves, 64CC combustion chambers, some have accessory holes, the 041 intake port should be 165CC's, the 041 exhaust port should be 65CC's. These heads have a single somewhat triangular shaped casting mark (slope on the upper left).

    People were cranking 6500-7000RPM from factory 2-bolt bottom ends and stock cranks and rods in the late 60's at the drags. /forums/images/graemlins/thumb.gif
     
  19. jjlaughner

    jjlaughner 3/4 ton status

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    OK I admit I know jack about motors and stroking engines and all that jazz.. is there a website or a good book to checkout for all the strokes and bores and converion numbers and multiplication tables? /forums/images/graemlins/ears.gif
     
  20. SUBFAN

    SUBFAN 1/2 ton status

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    Go to Summit racing and check out their line of HP books....

    That would be a good place to start. /forums/images/graemlins/grin.gif
     

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