« previous next »
Pages: [1]   Go Down

Author Topic: crankshaft options  (Read 9358 times)

Ponti

  • Guest
crankshaft options
« on: March 12, 2015, 03:19:30 AM »
Hi Matt.
 Could you help me. I'm starting to gather parts to build a blowen SBC 140" slingshot.
 I've been looking round for cranks and I've seen loads.
 One suggestion was to get a SBC crank with a BBC snout. Do I really need it?
 I know that whatever I get will need to be double keywayed.
 If it is better to go for one with the bigger snout which is best? The other problem with it is I've not seen a timing chain set that would fit, or am I missing stuff.
 Hope you can help, I'm probably overthinking or just confusing myself.
Cheers
Andrew
Logged

dreracecar

  • Guest
Re: crankshaft options
« Reply #1 on: March 12, 2015, 09:01:46 AM »
The BBC snout is the premier solution and have been running the same crank and hub and gear drive for the last 20 years,
 Second would be the stock dia snout with the ATI crank hub w/ BBC seal dia and a crank support
 Third (at minimum) would be the stock crank and ATI hub and check the hub retaining bolt frequently

  The stock crank needs the snout to be 1.25" longer to be reliable without the crank support and if you use a hub using the SBC seal dia, there is not enough material left from the keyways to the seal surface and the belt load splits the hub and rolls the key out of the crank. This wasnt a cheap hub either, it was the the top of the line RCD units and have seen 3 of these split.
Logged

Offline dusterdave173

  • Hero Member
  • *****
  • Posts: 638
    • View Profile
  • Your Best Time: 5.38in 1/8th
  • Your Engine: 355 CI SBC
  • Your Track: Mooresville, NC
  • Your Vehicle: CenPen 200 inch FED
Re: crankshaft options
« Reply #2 on: March 12, 2015, 09:17:40 AM »
Got a part number on that ATI hub? Is it the same hub they use on their dampers? Thanks
Logged
I have always had a fascination with fast cars at the expense of more normal character development

Offline George

  • Hero Member
  • *****
  • Posts: 515
    • View Profile
  • Your Vehicle: 1964 Mercury Comet Super Stock/ M automatic
  • General Location: Midwest USA
Re: crankshaft options
« Reply #3 on: March 12, 2015, 10:55:04 AM »
Logged

Ponti

  • Guest
Re: crankshaft options
« Reply #4 on: March 12, 2015, 12:01:31 PM »
Cheers guys.

Who makes cranks with the BBC snout?

 And what about timing chain and gears? As obviously a standard SBC set won't fit.
Logged

dreracecar

  • Guest
Re: crankshaft options
« Reply #5 on: March 12, 2015, 02:51:18 PM »
Logged

dreracecar

  • Guest
Re: crankshaft options
« Reply #6 on: March 12, 2015, 02:53:02 PM »
Velasco did mine $3000
I know that Crower makes one
Logged

Offline Paul New

  • Hero Member
  • *****
  • Posts: 743
    • View Profile
  • Your Best Time: 6.47 @ 214 MPH SBC
  • Your Engine: 387" SBC
  • Your Track: Woodburn Dragstrip
  • Your Vehicle: 2005 FED
Re: crankshaft options
« Reply #7 on: March 12, 2015, 06:21:02 PM »
Bryant built both of mine with BBC snout. What HP levels are you thinking about running? I have a good used crank that has BB Chrysler snout 3.48 stroke .010/.010 I have the gear drive that goes with it, the crank was built by BRC, the gear drive is Milodon, and the crank hub is RCD.
« Last Edit: March 12, 2015, 07:25:11 PM by Paul New »
Logged

dreracecar

  • Guest
Re: crankshaft options
« Reply #8 on: March 12, 2015, 06:33:46 PM »
If the price is right- the chrysler snout is a good option
Logged

Ponti

  • Guest
Re: crankshaft options
« Reply #9 on: March 13, 2015, 03:36:32 AM »
Quote from: Paul New on March 12, 2015, 06:21:02 PM
Bryant built both of mine with BBC snout. What HP levels are you thinking about running? I have a good used crank that has BB Chrysler snout 3.48 stroke .010/.010 I have the gear drive that goes with it, the crank was built by BRC, the gear drive is Milodon, and the crank hub is RCD.
Hi Paul,
 I did drop you a pm about your crank, did you get it?
HP wise. Not sure, I want to build a reliable engine to be competitive with but without having to be tearing it down all the time. A lot of the cars I'm looking at going up against are just mechanical injected SBC's. There are a couple of BBC's in there as well.
 My car's going to be a chromalloy 140ish WB slingshot 350 ci supercharged SBC running methanol, shorty glide. Hopefully a fun car to drive.
Logged

Offline Frontenginedragsters

  • Full Member
  • ***
  • Posts: 202
    • View Profile
    • Pro-Formance Specialties
Re: crankshaft options
« Reply #10 on: March 13, 2015, 05:13:23 PM »
The last engine we did I called Callies and bought a crankshaft.
They had them on the shelf with a B.B.Chevy snout double key cut.
I called Fred at Donovan Engineering and ordered a gear drive.
All billet cover with crank gear B.B.Chevy size double key ways.
There are more good options on the market. That stuff worked great for us.

Matt
Logged
Driving a Front Engine Dragster builds character and keeps you awake for a 1/4 mile at a time.
http://www.pro-formancespecialties.com/

Offline BK

  • Sr. Member
  • ****
  • Posts: 310
    • View Profile
  • Your Best Time: 8.45 / 5.30
  • Your Track: Empire Dagway
  • Your Vehicle: Late 70's FED
Re: crankshaft options
« Reply #11 on: March 13, 2015, 06:10:14 PM »
This might be an option. May take a little clearancing.
Logged

Offline GlennLever

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 2010
    • View Profile
    • The Lever Family Site
  • Your Best Time: 1/4 mile 7.950 at 165 MPH
  • Your Engine: Pontiac 461 Alky Blown
  • Your Track: Empire Dragway, NY
  • Your Vehicle: Front Engine Dragster
Re: crankshaft options
« Reply #12 on: March 14, 2015, 09:09:23 AM »
Quote from: BK on March 13, 2015, 06:10:14 PM
This might be an option. May take a little clearancing.

Your a funny man.
Logged
Glenn R. Lever
Rochester, New York 14617-2012
My Cars https://www.lever-family-racing.com/

Offline janjon

  • Full Member
  • ***
  • Posts: 208
    • View Profile
  • Your Best Time: 5.74/124 1/8
  • Your Engine: SB Chev, gas, 350ish
  • Your Track: Houston Motorsports Park
  • Your Vehicle: '65-ish 150" SBC/Glide FED
Re: crankshaft options
« Reply #13 on: April 06, 2015, 07:29:54 PM »
It would be interesting to see that crank running several thousand RPM. True operating range is probly somewhere in the double digits...
Wartsilla, is it?
Logged
Just keep the same amount of stuff on the right
as there is on the left. Seeing straight ahead is highly overrated....
Pages: [1]   Go Up
« previous next »