Stock 455 crank limits

Discussion in 'Race 400/430/455' started by 10sec 455, Sep 3, 2009.

  1. BP_Motorworks

    BP_Motorworks Ragtop Racer

    Why doesn't somebody just make a 4140 forged steel crank for the 455? I understand paying $5000.00 for an aftermarket block but $2800.00 for a billet crank? It seems overkill to me unless you plan on laying down 2000+. Many Fords lay down massive numbers with 4140 cranks and they are small blocks. BBC factory forged 427 cranks are good to 1500. I don't think those are even a 4140 material. What is the new block rated to? Cast iron or aluminum. Anybody know if the TA 4 bolt conversion adds any strength to the block? It would be nice to find a cheaper alternative to a more powerful 455. 1000 HP used to be a lot but not anymore as HP has become so cheap to build, except for a Buick. It is very frustrating to see the new C5 vetts add bolt ons and spray and make close to what I make. Better yet they get good MPG while I get 6 and run race gas.

    Blair
     
  2. Bobb Makley

    Bobb Makley Well-Known Member

    We have used on two different motors a 4140 chrysler crank It is a little bit of a hassle but we did for far less than a billet crank. As far as what the new TA block is rated to I don't know it should handle 2000 I would think but no one has but it to the test yet. I wish rod would get it together and dyno but it didn't sound like he was going to dyno it when done. I'm not sure what TA four bolt conversion you are talking about. as long as we have buicks they will never be as cheap as a chevy
     
  3. BP_Motorworks

    BP_Motorworks Ragtop Racer

    Not going to dyno when done, thats the first place I head after a new ones together. TA told me they have a 4 bolt modification they can do to the 455 blocks. They did not say what it could hold but I told them I want to make 1300. They said there was a guy that has one of the 4 bolt conversion blocks and is selling it because he got a TA block. (I thought this was what they said) They gave me his number. (forgot his name) It supposed to be filled to the top with concrete. They said they could convert mine for 400.00. (Assuming you already have block girdle) I have thought about it except for the crank issue. Are you the same Bobb from finnishline? If so I need to call u about the Chrysler crank. I got the car, trans, converter, and rear end for the power, I just need the bottom end.
     
  4. sean Buick 76

    sean Buick 76 Buick Nut Staff Member

    Yes, he is the Bob from Finishline.

    For sale add for the 4 bolt block:
    http://www.v8buick.com/showthread.php?t=180146&highlight=bolt+block

    Pics here:
    http://buickperformancegroup.com/forums/showthread.php?t=8389
     
  5. td99

    td99 Well-Known Member

    and im guessing the chrylser crank is 2.75", right? did you make up special spacers for that one as well?

    Cody
     
  6. Dubuick

    Dubuick CMDR Racer

    All of this HP talk Starting to get my thinking of a turbo BBB .I have been working on a freind twin turbo SBC camaro 383 2 t-60's made 720hp at the wheels on pump gas and is a daily driver.Also I think a turbo would be a lot easyer on lower end
     

    Attached Files:

  7. Bobb Makley

    Bobb Makley Well-Known Member

    one of the cranks was welded up to fit and the other went into a bulldog block.
    If you were planning on running a solid block I think the block of rods would be a good choice. I think there is some strength in the four bolt deal we did the one I have around the time TA was doing rods the first we just never finished it. No one has really ever just pushed one til it broke but with my four bolt deal what little time it has on it it did see 1370hp. I have never looked at the ta conversion closely but it seems to work on rods so it can't hurt.
     
  8. 10sec 455

    10sec 455 Well-Known Member

    Bobb,
    Mind if I call you to ask a few questions on the Chrysler crank deal?
     
  9. Bobb Makley

    Bobb Makley Well-Known Member

    Jeff you know as anyone is feel free to call I will share what ever i can I don't know all but we are always trying to do something different on our stuff to see if we can help when other need it. Sometime s it works sometimes they put kitty litter down after you make a pass LOL
     
  10. Bobb Makley

    Bobb Makley Well-Known Member

    Jeff
    I took these today after Anthony and I got done working on it. We have a idler on order and the brackets need to be trimmed down but I'm not cutting the extra until we are finished. But we got a long ways on it should be able to finish it in a couple three hours once we have the idler. Then to the dyno for a tug or two and hope te thing hangs together. I think it is going to make some good torque down low. We ar egoing to run it NA then with 5-7 pounds of boost then around 12 to 13 and do a tune up for each. these pics aren't the best there off my phone I forgot the camera.

    [​IMG]

    [​IMG]

    [​IMG]
     
  11. 10sec 455

    10sec 455 Well-Known Member

    Bobb,
    I have a brand new 30mm idler, if that is what your running.
     
  12. 10sec 455

    10sec 455 Well-Known Member

    Looks cool Anthony and Bobb!
     
  13. Bobb Makley

    Bobb Makley Well-Known Member

    thanks jeff we have one coming but thanks though. We are using the 12 grove serpintine on his we don't really plan on pushing it to hard.
     
  14. verruckt

    verruckt Nitromethane addict

    Would one of you gentlemen mind posting some more detailed info on getting the nailhead or chrysler crank in a 455? I think you can buy raw forgings of the chrysler crank. Is that what you did, and have it ground? My mind is working in overdrive now...
     

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