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Bob Wieght... Is this light? Crank BILLET vs Forge?? #456573 09/01/09 05:19 PM 09/01/09 05:19 PM
Joined: Apr 2005 Posts: 1,107 Quebec, Canada D Diablo OP super stock
Diablo OP super stock D Joined: Apr 2005 Posts: 1,107 Quebec, Canada	Well long story short.... Need a new crank. What was in it was a Bryant billet. Seems to me after balancing the price difference is not a huge amount. Should i go with a Bryant again or a Forge Callies? With Callies is the metal soft after you grind them .010+? Since it only has a case harden? Where the billet is good for .020+?? This is just incase you mess up a main or rod bearing. This crank is a 5 inch stroke. That goes in the my B1-TS engine. No nitrous N/A around 1200hp. And i weighed my the piston, rod, bearing, rings ect and it weighed 1777 grams. Is this good for a 7.100 alum rod (MGP) and 4.562 piston? (BME) thanks Doug

Re: Bob Wieght... Is this light? Crank BILLET vs Forge?? [Re: Diablo] #456574 09/01/09 09:56 PM 09/01/09 09:56 PM
Joined: Apr 2005 Posts: 1,107 Quebec, Canada D Diablo OP super stock
Diablo OP super stock D Joined: Apr 2005 Posts: 1,107 Quebec, Canada	Oh come on lol No one has anything to say???

Re: Bob Wieght... Is this light? Crank BILLET vs Forge?? [Re: Diablo] #456575 09/01/09 10:28 PM 09/01/09 10:28 PM
A Anonymous Unregistered
Anonymous Unregistered A	either crank will get the job done. can you post the individual weights of the components to get that bob weight? sounds pretty light.

Re: Bob Wieght... Is this light? Crank BILLET vs Forge?? [Re: Diablo] #456576 09/01/09 10:28 PM 09/01/09 10:28 PM
Joined: Feb 2006 Posts: 243 NJ A arc enthusiast
arc enthusiast A Joined: Feb 2006 Posts: 243 NJ	bryant is the only way to go but 1777 cant be the bob wt i have done many of these motors with 7.1 mgp rods the bob wt of 2050 is more like it http://www.youtube.com/watch?v=yuYVxeW474U Last edited by arc; 09/01/09 10:29 PM.

Re: Bob Wieght... Is this light? Crank BILLET vs Forge?? [Re: arc] #456577 09/01/09 10:39 PM 09/01/09 10:39 PM
Joined: Feb 2005 Posts: 5,207 Menomonee Falls DemonDust master
DemonDust master Joined: Feb 2005 Posts: 5,207 Menomonee Falls	My rods, pistons, rings, pin and bearings weigh in at 1047. 6.200 billet carrillo, 4.185 bore 1.175 CH 1567 BW These are small block parts though SDG Motorsports Hellcat Demon and Redeye Supercharger CNC Porting https://www.sdgmotorsports.com/

Re: Bob Wieght... Is this light? Crank BILLET vs Forge?? [Re: DemonDust] #456578 09/01/09 11:04 PM 09/01/09 11:04 PM
Joined: Apr 2005 Posts: 1,107 Quebec, Canada D Diablo OP super stock
Diablo OP super stock D Joined: Apr 2005 Posts: 1,107 Quebec, Canada	Ok am i missing something? When i put my piston, rings, bearing, pin, rod on the scale it read 1777grams (ill double check tomorrow) is there a calculation to find the BW???

Re: Bob Wieght... Is this light? Crank BILLET vs Forge?? [Re: Diablo] #456579 09/01/09 11:16 PM 09/01/09 11:16 PM
Joined: Feb 2006 Posts: 243 NJ A arc enthusiast
arc enthusiast A Joined: Feb 2006 Posts: 243 NJ	Quote: Ok am i missing something? When i put my piston, rings, bearing, pin, rod on the scale it read 1777grams (ill double check tomorrow) is there a calculation to find the BW??? ch of 1.1 is scary u might wont to get a 7.00 rod 5456595-IMG_0008_1.jpg (130 downloads)

Re: Bob Wieght... Is this light? Crank BILLET vs Forge?? [Re: Diablo] #456580 09/01/09 11:19 PM 09/01/09 11:19 PM
Joined: Aug 2003 Posts: 43,317 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,317 Bend,OR USA	Quote: Ok am i missing something? When i put my piston, rings, bearing, pin, rod on the scale it read 1777grams (ill double check tomorrow) is there a calculation to find the BW??? I think the bob weights consist of half the rod weight(I'm not sure which end?), rod bearings, piston with pin and rings and some oil. I'm not a machinest or a qualified engine balancer tech, but that is what I remember from various discusions on bob wieght, hopefully one of the more knowledgabe techs will chime in and correct me as needed or verify what the correct desription of the bob weight is Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Bob Wieght... Is this light? Crank BILLET vs Forge?? [Re: Cab_Burge] #456581 09/01/09 11:36 PM 09/01/09 11:36 PM
Joined: Mar 2008 Posts: 883 Affton MO Q qwkmopardan super stock
qwkmopardan super stock Q Joined: Mar 2008 Posts: 883 Affton MO	Bobweight =: Big end rod weight X2 Rod Bearing X2 Piston + Pin Spiro-lox for 1 piston if used Rings for 1cyl Sm end rod weight +5 grams for Oil

Re: Bob Wieght... Is this light? Crank BILLET vs Forge?? [Re: Diablo] #456582 09/01/09 11:37 PM 09/01/09 11:37 PM
Joined: Feb 2005 Posts: 5,207 Menomonee Falls DemonDust master
DemonDust master Joined: Feb 2005 Posts: 5,207 Menomonee Falls	Quote: Ok am i missing something? When i put my piston, rings, bearing, pin, rod on the scale it read 1777grams (ill double check tomorrow) is there a calculation to find the BW??? Rotating weight (both big rod ends and rod bearings)+ recipricating weight (piston, pin, locks, rings, oil, Small end weight) SDG Motorsports Hellcat Demon and Redeye Supercharger CNC Porting https://www.sdgmotorsports.com/

Re: Bob Wieght... Is this light? Crank BILLET vs Forge?? [Re: arc] #456583 09/02/09 12:36 AM 09/02/09 12:36 AM
Joined: Feb 2005 Posts: 5,207 Menomonee Falls DemonDust master
DemonDust master Joined: Feb 2005 Posts: 5,207 Menomonee Falls	My rods, pistons, rings, pin and bear

Re: Bob Wieght... Is this light? Crank BILLET vs Forge?? [Re: DemonDust] #456584 09/02/09 10:15 AM 09/02/09 10:15 AM
Joined: Feb 2004 Posts: 3,441 Mo. S supercomp master
supercomp master S Joined: Feb 2004 Posts: 3,441 Mo.

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