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Beefed up 305...LOL

Discussion in 'The Garage' started by 1985K20, Apr 7, 2005.

  1. 1985K20

    1985K20 1/2 ton status

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    Yeah i still have my little 5L in little 5000Lbs truck...now that I changed my mind about gettin the 6.2L (injector lines all rusted out, glow plugs taken out, rusty glow plugs treads...sideways in a mud hole in an old barn for two years :frown1: )!

    So, I decide to keep my 305. I know it small CID but is there cheap mods i could slap on to beef it up a bit??

    Woud headers help any? intake? carb? cam? anything?
     
  2. kyser_soze

    kyser_soze 1/2 ton status

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    set or vortec heads and intake to boot. Around $500.00 for both. Ad a cam for another $150.00. Also look into roller lifters. If your 305 is still healthy, or swap a 350 in.
     
  3. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    I tell you what , my little 305 is damn hard to kill . I keep saying I will build my 350 up soon for it , but the little thing gives me enough fo rnow so I can spend cash on other things .

    I can cruise 70 mph all day long and still crawl with the 5000 lbs .

    All I have done to it was changed the heads ( stock , asked guy for Camaro heads , probably the same ) , added a good Quadrajet from I-5 in Cali , and changed the ESC distributor for an HEI spec'ed for a 76 Nova V-8 :grin:
     
  4. beastofablaze

    beastofablaze 1/2 ton status

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    the best mod you can do to a 305 for the money is a higher stall torque converter.... vortecs, cam, and a 2400 converter will get that thing movin like a real v8.
     
  5. gravdigr

    gravdigr 1/2 ton status

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    The 305 may be a slug, but it is damn hard to kill. Mine has over 128k miles and still runs like a champ considering it's a 305. I have a 350 crate motor with 10k miles on it waiting to go in but I hate to pull a running motor :D
     
  6. zeroz400

    zeroz400 1/2 ton status

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    Ive got a Edelbrock performer intake on my 305 and it really woke up the motor. My friends always thought it was a 350 till i spilled the beans. :haha:


    Later
     
  7. dirtwarrior17

    dirtwarrior17 Banned

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    If you ever compare dyno charts between a 350 and a 305 with the same parts, the hp numbers will be real close, about 10-20 off, but the torque is where the 305 gets left behind.

    I don't know why everybody says these trucks weigh 5000... probably because of tires, axles, motors, etc but stock they weigh in (at least in 88) at 4500 lbs.
     
  8. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Shane, go run a K5 over the scales and see for yourself.

    Stock 4x4, they run about 4900-5100 lbs. A stripped down, no options model, 2WD without the optional fibreglass topper might come in at 4500 but that'd be a stretch.

    Again, GM's own literature is not the best source of accurate info.

    Rene

    PS, welcome back :)
     
  9. dirtwarrior17

    dirtwarrior17 Banned

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    heh... good to be back.

    I will find out sooner or later... I plan to get one of those g-tech pro's to measure rwhp but if I want it to be completly accurate I need to get my vehicles exact weight so i'll be hitting the scales sooner or later.

    suprising about gm...
     
  10. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    My Jimmy about 4 years ago. D44 front, 14 bolt rear, 36" TSL's and steel rims, 355, SM465, NP205, fairly light bumpers (~60 lbs each) soft top, 200 lbs of trail gear, 1/2 tank of gas and me in the drivers seat...

    5700 lbs...

    The trail gear and the missing hardtop cancel each other out. Remove my own weight and we're down to 5550 lbs. Subtract 60 lbs of extra bumper weight, and we're at 5490 lbs. Lose another 150 lbs for the 14 bolt and we're at 5340 lbs. Add 50 lbs for carpet and other niceties I removed...5390 lbs.

    Last time I weighed it with the cage and on the 40's and with the diesel it was 5940 lbs with the hardtop on but no back seat or any gear. Also no winch :blush:

    In trail trim I figure realistic is 5700-5800 lbs for my truck.

    I guess GM released curb weight for the lightest factory K5 they made. 6 cylinder, auto, 2WD, no power options, and no hardtop (technically an option). I don't imagine it would have helped sales if everyone was well aware of what fat bastards these trucks really are.

    FWIW a 4x4 S-10 blazer tips the scales at 4500 lbs, at least my 89 did.

    Rene
     
  11. Z3PR

    Z3PR Banned

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    It's a 305. Put some lower gears in them thar axles will help a 305 more then anything else.
     
  12. dirtwarrior17

    dirtwarrior17 Banned

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    yeah i figured it would be close to that since the manual says somethin like 4k although the 2dr is probably lighter. My bro's 4.3 91 s-10 jim on 31's is actually slower than my 88 k5 on 35's when i had the stock 350 in it... I'd be interested in racing my moms '96 3.8L mustang down the 1/4 mile now that i have 350 hp and 400 ft lbs, i would think it would be pretty close... power to weight ratios are close with the edge goin to the k5 but aerodynamics comes into play. It would be interesting.
     

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