4340 Billet Buick 350 Crank by Kings Crankshaft

Discussion in 'Small Block Tech' started by Nothingface5384, May 19, 2012.

  1. Nothingface5384

    Nothingface5384 Detail To Oil - Car Care

    So havent gotten an approx price as of yet ,but have a company that's willing to do a billet 4340 billet crankshaft for the buick350!

    My question is how many would be interested and at what stroke?
    This coule be a perfect time to for destrokeing? 3.80 stroke?

    The most obvious would be to just do stock stroke at 3.85
    or we can do a stroke at 3.40 like the sbb 300/v6s which = 313-314 cubes with .030 over
    or even a 3.26 stroke at .030 over yeilds 300 cubes
    or 3.69 stroke at 0.30over to give 340 cubes

    or make it a square engine with a 3.83 bore and 3.83 stroke
    Last edited: May 19, 2012
  2. Schurkey

    Schurkey Silver Level contributor

    I can't think of a good reason to throw away cubes/torque/power.

    How far down in the hole do the pistons typically end up on a Buick 350? Add almost that much arm so that squaring the decks also gives you piston tops level with the deck. Maximum benefit with minimum stock removal at the deck surface. Maybe .020--.030 more arm? (Double that for additional stroke--.040 to .060?)
  3. Nothingface5384

    Nothingface5384 Detail To Oil - Car Care

    actually destroking it to 3.80 over the 3.85 wouldmake it breath better without sacrificing any real lowend torque. more bore then stroke when overbored .010 or more
    I'm mainly just interested in seeing how many people would buy a billet crank if we can get a decent price

    majority would want stock stroke of 3.85 though if we actually had an option cant hurt to entertain the thought of destroking for a fast and hi revving motor for say a supercharged engine or an engine tailored to roadroace/circle track
  4. gsjohnny1

    gsjohnny1 Well-Known Member

    all depends on what car you have and what you want to do. i prefer the bore to be bigger than the stroke. damn, we need an 350 aluminum block for this crank! :Brow:
  5. Nothingface5384

    Nothingface5384 Detail To Oil - Car Care

    Yea I hear you at this point I just want a. Billet crank and if a groupbuy at stock stroke makes it cheaper then so be it...good for my twin turbo motor..or if people are willing to do a 3.80 stroke awsome..
  6. 87GN@Tahoe

    87GN@Tahoe Well-Known Member

    I would buy one if it could be optioned in 300 main journal size (2.5" I believe) and honda rod journal size (1.88"). Knife edged counterweights (preferably slightly smaller diameter too) and gun drilled journals as well, of course....

    I would also suggest cutting the snout of the crank to more readily accept the MUCH better oil pump included in the Land Rover Discovery front timing cover:bglasses:
  7. Nothingface5384

    Nothingface5384 Detail To Oil - Car Care

    Thanks for the imput buddy
    when ever he replies back i'll mention this
    if I could afford 2 cranks i'd do one almost the same was as you but with 3.95 stroke..or possible 4in if knew i could squeeze an extra .05 over the proven 370 stroker
  8. 87GN@Tahoe

    87GN@Tahoe Well-Known Member

    AH YES, I forgot to add in the stroke!..... THAT TOO! .030" over bore and 3.95 stroke would yield 364ci(rounded down from 364.066) with a 4" stroke it would yield 369ci (368.7ci rounded).

    I think you could go with a 4" stroke of you went with the 1.85" Honda journals, as they're 0.15" smaller than stock. Some of the NASCAR rod offerings come in the 1.85" sizing.

    ALSO, have you contacted Bryant Crankshafts OR Moldex Crankshafts (who I believe have already made cranks for the Rover crowd)?

  9. Nothingface5384

    Nothingface5384 Detail To Oil - Car Care

    ive contacted them along with somemore
    perhaps if wecan getmorevendors to bite we'll have a better picking for pricing

    out of the 7-10 or so ive contacted about 3 said no.
    kings crankshaft straightup said they could do abillet piece,just waiting on some $$$ figures
    i'm sure it'll be 2k min
  10. pocket5s

    pocket5s Well-Known Member

    I'm not as familiar with the possible stroke combinations on a sbb, but I'd personally opt for the 370 version myself. As for the other various possibilities mentioned, I'd bet there would be more interest if supporting parts (rods In particular) didn't have to be custom made. I'm ok with buying the Yates or hershe rods that have been discussed many time though.

    I certainly would pay 2k for a billet crank. Maybe a bit more considering I'd think of it as essentially bullet proof for this engine. I plan on running turbos on mine and while others do fine, I'd really like to be able to get to that 1000hp level like that pro charged sbb did.

    I won't be ready for one for quite a while, but if there was a group buy that got the price down a bit I'd be willing to get one in a month or two at the earliest.
  11. Nothingface5384

    Nothingface5384 Detail To Oil - Car Care

    yea, Ill pay up to 3k but hopeing more for around 2-2500

    needs to be .060 over for 370 with 3.95 stroke with lentz rods the rod ratio decreases a little but is still a good ratio
    you can pull a gsjohnny and do. 075 with stock stroke if you plan for just a track only motor. his motor screams.if we even just de-stroked his combo to a 3.80 it'd helpa bit more while not needing to change rods
  12. pocket5s

    pocket5s Well-Known Member

    I'd Consider 2000-2500 fair for a billet crank, but honestly I've never really looked into them for any motor.

    Mine won't be track only though. I like to drive my vehicles :). As for the extre cubes, after reading a story in a mag comparing a 355 vs 383, everything equal as could be (cam, compression, heads) the extra 28 cubes were worth 40hp and about the same for torque. In a sbc the cost difference between the two are miniscule. I know this isn't a sbc, but I'll takes the cubic inches any day if I'm spending the money anyway on high dollar parts.
  13. 87GN@Tahoe

    87GN@Tahoe Well-Known Member

    One-off single cranks will run about $4,000 a piece... I never asked about getting a price break for several.

    If one is going to go big bucks on the crank it would be a damn shame to f*** it up by not using proper rods and pistons and having one of those pieces fail.

    My plans are 300ci block bored as much as is safe (at least 3.800"), stroker crank, hydraulic roller cam, NASCAR takeout rods, custom forged pistons, ported TA Buick/Rover heads, home made sheetmetal intake (done), EFI, and 20+lbs of boost from a 74mm Ball Bearing turbo... ALL in an unassuming street driven '65 Special Wagon :3gears:
  14. gsjohnny1

    gsjohnny1 Well-Known Member

    anybody ever see some of the nascar c/s design/used? pretty wild. i asked about that.
  15. Nothingface5384

    Nothingface5384 Detail To Oil - Car Care

    yea, every bottom end piece I have is bullet proof
    ..just need a billet crank and a girdle and i'm set
    i'm sure i'll only have enough $$$ for one ..so got to figure out if i'm going to get it for the hershe bottomend build or the lentz stroker..both will end up being turbo fed
  16. Nothingface5384

    Nothingface5384 Detail To Oil - Car Care

    Well I have great know to whoms interested which ill post later

    ---------- Post added at 03:05 PM ---------- Previous post was at 01:45 PM ----------

    Ok so some good updates

    From Rick King of King Crankshafts

    We can make a billet 4340 crankshaft good for a 1000+hp
    We would make them from E4340 TIMKEN cost $2200.00 to $2500.00 any stroke and bearing combo , time 12-14 weeks.

    From Joe @ Moldex crankshaft


    Yes we can make a 4340 billet for your Buick. We can do any stroke rod main combo you like.

    Price starts at $2750


    Joe Flower

    Moldex Crankshaft Co.

    12255 WORMER ST.

    Redford, Mi 48239

    (313)387-6099 Phone

    (313)387-6122 Fax

    Chris from CNC Motorsports can alsomake a 4340 Chromoly billet crank...3250 10-12 weeks

    I'm not going tobother with Bryant racing as they need a blueprint or actual crank (sample) before they can do an estimate and told me 1 would be really expensive and would need 10+ orders to waive the tooling/programing

    So Rick still sounds like the best option ..Pretty sure he does custom rods and pistons if you fancy getting everything at same place
    Last edited: May 23, 2012
  17. gsjohnny1

    gsjohnny1 Well-Known Member

    :eek2: i have looked at the bottom side of the 350 regarding the 'girdle'. imho, the 350 being a thinwall casting thru out, i dont the girdle is going to offer
    much support. the block wall from the pan rail up to and beyond the crank c/line is pretty thin. even the crank webbing is thin. there is not much support. i dont think the girdle is going to support the crank web. maybe i'm wrong, but i tend to look thru the block at every angle(not superman, but old school machinist view).

    another question(haven't figured out the answer yet) is the girdle for h/p or rpm support? maybe we need to figure this out before we go further.

    this just brings us back to 'WHERE'S THE S/P INTAKE, ALUMINUM HEADS AND ALUMINUM BLOCK??? :laugh: :laugh:
  18. Nothingface5384

    Nothingface5384 Detail To Oil - Car Care

    updated thread with material and priceing for cnc motorsports

    i'll probably call rick up soon and see if its ok tosend a .010 under crank as a sample

    Not sure if chromoly is stronger them Timken but it'll bemore then enough to handle anything..bryant racing uses 4340 Timken also so i doubt its inferior to 4340 chromoly..i know its lighter then chromoly though.

    Sean is working on the girfler ordeal though i think its on the back burner at the moment. Pretty sure it started out as the template Billmah used on the 1000+ s/c 350 engine
    I like over-buiilding things.. if it'll help with block flex and or crank walk im all for it

    ps not worried about al intake...got nice sheetmetel one..
  19. 87GN@Tahoe

    87GN@Tahoe Well-Known Member

    Wow, that is a lot less than I was expecting. Lets roll
  20. roverman

    roverman Well-Known Member

    >> With 3" mains, you "might" have enough room for roller bearings =way less drag. I have a single plane crank drawing now. I will forward to "RPM" for billet crank qoute. FWIW, Timken 4340 is chrome moly and the "same" weight as any chrome moly. Timken just happens to be one of the largest/non-chinese suppliers of chrome moly steels. Onward, roverman.:)

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