how much can it rev? cast crank - Moparts Forums

Register Log In Moparts Forums Unlawfl's Race & Engine Tech how much can it rev? cast crank

Print Thread

how much can it rev? cast crank #1341148 11/25/12 05:14 PM 11/25/12 05:14 PM
Joined: Feb 2004 Posts: 855 ontario canada kingston aspenrt360 OP super stock
aspenrt360 OP super stock Joined: Feb 2004 Posts: 855 ontario canada kingston	Hey guy's this is a bit out of my area so i figured i would chime in here. i have a good friend who has built himself up a 360 with a stock style cast crank it has been cut .010 fully balanced and he is using eagle h beam rods and kb 107's what can this set up reasonably take rpm wise? thanks 2013 Chrysler 300 touring 1974 Dodge Charger SE. 360-727-8.75-3.23 sure grip 1972 Dodge Dart Swinger 1995 Dodge Ram 1500 4x4

Re: how much can it rev? cast crank [Re: aspenrt360] #1341149 11/25/12 05:55 PM 11/25/12 05:55 PM
Joined: Oct 2005 Posts: 902 S.E. Minnesota gtsdude super stock
gtsdude super stock Joined: Oct 2005 Posts: 902 S.E. Minnesota	I have a friend that runs his up to 7 grand on occasion, typically 6500 upshifts, same combo with 509 mp cam 7476155-DSC01625%20(Small).JPG (54 downloads)

Re: how much can it rev? cast crank [Re: gtsdude] #1341150 11/25/12 06:08 PM 11/25/12 06:08 PM
Joined: May 2006 Posts: 1,260 New Mexico A Adobedude pro stock
Adobedude pro stock A Joined: May 2006 Posts: 1,260 New Mexico	I ran mine to 6800 every pass for years, but my valve train could handle it, stock 360 crank is pretty stout, but who made the stock style crank....? Eagle? 2001 Dodge Dakota 408 All Motor 11.27 @ 117.83 mph 2017 NM Mopar Challenge Series Champion.

Re: how much can it rev? cast crank [Re: Adobedude] #1341151 11/25/12 06:09 PM 11/25/12 06:09 PM
Joined: Jan 2003 Posts: 9,670 Lima, Peru domingo EL Master
domingo EL Master Joined: Jan 2003 Posts: 9,670 Lima, Peru	I used to turn mine 6500 to 6800 all the time..... D

Re: how much can it rev? cast crank [Re: domingo] #1341152 11/25/12 07:38 PM 11/25/12 07:38 PM
Joined: Feb 2004 Posts: 855 ontario canada kingston aspenrt360 OP super stock
aspenrt360 OP super stock Joined: Feb 2004 Posts: 855 ontario canada kingston	it is an actual mopar crank with a bit of prep work nothing major. thanks for the replies i can't see it getting over 6400 just want to get a feel for what guy's have been able to do with them. 2013 Chrysler 300 touring 1974 Dodge Charger SE. 360-727-8.75-3.23 sure grip 1972 Dodge Dart Swinger 1995 Dodge Ram 1500 4x4

Re: how much can it rev? cast crank [Re: aspenrt360] #1341153 11/25/12 07:44 PM 11/25/12 07:44 PM
Joined: Sep 2004 Posts: 2,091 oberlin, Ohio Rapid340 top fuel
Rapid340 top fuel Joined: Sep 2004 Posts: 2,091 oberlin, Ohio	Quote: it is an actual mopar crank with a bit of prep work nothing major. thanks for the replies i can't see it getting over 6400 just want to get a feel for what guy's have been able to do with them. It wont even break a sweat. 1971 Factory Appearing Duster 340 11.000 @ 122 mph

Re: how much can it rev? cast crank [Re: aspenrt360] #1341154 11/25/12 08:05 PM 11/25/12 08:05 PM
Joined: Nov 2004 Posts: 1,708 S. Il. U.S.A. 5spdcuda top fuel
5spdcuda top fuel Joined: Nov 2004 Posts: 1,708 S. Il. U.S.A.	I shift at 6,200 rpm. Rev limiter is set at 6,600 and I've bounced off it a couple of times. Chrysler claimed in their engine book that they are good for 7,000 rpm. I am not sure I would try this on a circle track or road race engine due to all the thrust reverseals. My crank is an original '79 CFD casting that is internally balanced and polished, but never turned, still standard size. It's also been in two different blocks and must have at least 300,000 miles on it by now. Chrysler had two different sources for 360 cranks. Both are cast, and most were cast in a Chrysler foundry. Some however were cast by GM for Chrysler and are identified by the letters CFD. Or at least that's what I've been told.

Re: how much can it rev? cast crank [Re: aspenrt360] #1341155 11/25/12 08:17 PM 11/25/12 08:17 PM
Joined: Jan 2003 Posts: 31,029 Oregon A AndyF I Win
AndyF I Win A Joined: Jan 2003 Posts: 31,029 Oregon	Super Stock guys run the cast cranks because they are lighter. Those motors spin pretty hard. 7500 or so?

Re: how much can it rev? cast crank [Re: 5spdcuda] #1341156 11/25/12 10:31 PM 11/25/12 10:31 PM
Joined: Nov 2009 Posts: 2,177 ill D dennismopar73 top fuel
dennismopar73 top fuel D Joined: Nov 2009 Posts: 2,177 ill	Quote: I shift at 6,200 rpm. Rev limiter is set at 6,600 and I've bounced off it a couple of times. Chrysler claimed in their engine book that they are good for 7,000 rpm. I am not sure I would try this on a circle track or road race engine due to all the thrust reverseals. My crank is an original '79 CFD casting that is internally balanced and polished, but never turned, still standard size. It's also been in two different blocks and must have at least 300,000 miles on it by now. Chrysler had two different sources for 360 cranks. Both are cast, and most were cast in a Chrysler foundry. Some however were cast by GM for Chrysler and are identified by the letters CFD. Or at least that's what I've been told. Hi there Hugh!!! Alot does depend on how the motor was built mainly valvesprings/cam pick and of course rod bolts . I have been with a guy who races and drives alot of 360 he can go in the 7 grand rang plus. I have seen shifts upwards of 7200 and he gets quite a few years out of a motor . Now i have ran 360 in my old street car and shifted @ 5800 mark drove that car for well over 13 years I built the motor in 1992, the motor was not even balanced!! That exact motor is still running to this day, Anytime you race one hard the life espectancy come into play,,but with care upkeep , that motor can run a very very long time !! But the biggest deal is to build it right

Re: how much can it rev? cast crank [Re: dennismopar73] #1341157 11/25/12 11:30 PM 11/25/12 11:30 PM
Joined: Nov 2004 Posts: 4,330 Lynchburg, VA Leon441 master
Leon441 master Joined: Nov 2004 Posts: 4,330 Lynchburg, VA	Used to shift at 7,500 and go through traps over 8,000 with a cast steel truck crank. Career best 8.02 @ 169 at 3050# and 10" tires small block power.

Re: how much can it rev? cast crank [Re: Leon441] #1341158 11/26/12 12:00 AM 11/26/12 12:00 AM
Joined: Feb 2011 Posts: 4,302 Nebraska 72Swinger master
72Swinger master Joined: Feb 2011 Posts: 4,302 Nebraska	8000 rpm with 550hp is alot different than 8000rpm with 650hp. And those shot peened truck cranks were great cranks. Mopar to the bone!!!

Re: how much can it rev? cast crank [Re: 72Swinger] #1341159 11/26/12 01:46 AM 11/26/12 01:46 AM
Joined: Apr 2009 Posts: 3,415 Toronto M mshred master
mshred master M Joined: Apr 2009 Posts: 3,415 Toronto	Quote: 8000 rpm with 550hp is alot different than 8000rpm with 650hp. And those shot peened truck cranks were great cranks. shot peened truck cranks? Is this how they came? what were they found in?

Re: how much can it rev? cast crank [Re: mshred] #1341160 11/26/12 01:50 AM 11/26/12 01:50 AM
Joined: Jan 2003 Posts: 9,826 las vegas 70AARcuda master
70AARcuda master Joined: Jan 2003 Posts: 9,826 las vegas	Quote: Quote: 8000 rpm with 550hp is alot different than 8000rpm with 650hp. And those shot peened truck cranks were great cranks. shot peened truck cranks? Is this how they came? what were they found in? shot peen truck cranks can be found in trucks...lol Tony 70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)

Re: how much can it rev? cast crank [Re: 70AARcuda] #1341161 11/26/12 01:55 AM 11/26/12 01:55 AM
Joined: Apr 2009 Posts: 3,415 Toronto M mshred master
mshred master M Joined: Apr 2009 Posts: 3,415 Toronto	Quote: Quote: Quote: 8000 rpm with 550hp is alot different than 8000rpm with 650hp. And those shot peened truck cranks were great cranks. shot peened truck cranks? Is this how they came? what were they found in? shot peen truck cranks can be found in trucks...lol lol duh....but I have a 91 360 out of a truck....is shot peening something you can see??? cuz it didn't seem like a special crank to me

Re: how much can it rev? cast crank [Re: mshred] #1341162 11/26/12 04:45 AM 11/26/12 04:45 AM
Joined: Feb 2011 Posts: 4,302 Nebraska 72Swinger master
72Swinger master Joined: Feb 2011 Posts: 4,302 Nebraska	I believe they were 74 only that got peened. Mopar to the bone!!!

Re: how much can it rev? cast crank [Re: 72Swinger] #1341163 11/26/12 12:57 PM 11/26/12 12:57 PM
Joined: Feb 2004 Posts: 855 ontario canada kingston aspenrt360 OP super stock
aspenrt360 OP super stock Joined: Feb 2004 Posts: 855 ontario canada kingston	thanks for all the info guy's, it will never see 7000! shift point should be about 6200 so i was just looking to see what kind of wiggle room he would have. 2013 Chrysler 300 touring 1974 Dodge Charger SE. 360-727-8.75-3.23 sure grip 1972 Dodge Dart Swinger 1995 Dodge Ram 1500 4x4

Re: how much can it rev? cast crank [Re: aspenrt360] #1341164 12/03/12 02:58 AM 12/03/12 02:58 AM
Joined: Feb 2003 Posts: 1,730 Red Deer, Alberta B bill_greenwood top fuel
bill_greenwood top fuel B Joined: Feb 2003 Posts: 1,730 Red Deer, Alberta	Internally balanced cast unit in mine sees 71-7200 every pass.

Re: how much can it rev? cast crank [Re: bill_greenwood] #1341165 12/03/12 02:18 PM 12/03/12 02:18 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	As the main journal size is larger than a 440 main, the crank should be pretty stiff. That's good, I believe most crank failures that start out as crank failures come from fatigue due to flexing. R.

Re: how much can it rev? cast crank [Re: dogdays] #1341166 12/03/12 02:34 PM 12/03/12 02:34 PM
Joined: Jul 2008 Posts: 30,424 Florida STAYcation dOrk ! The village idiot's idiot
dOrk ! The village idiot's idiot Joined: Jul 2008 Posts: 30,424 Florida STAYcation	x99 on actually higher potential R's due to the crank THUS the rotating-assembly being able to be made lighter. The big downer on a cast crank is a heavy weight car ... then add that to the shock of a stick shift combo.

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1