Visit The Dirt Forum for More Information

Author Topic:   400 crank
mod777
Member
posted December 29, 2001 01:43 PM
I feel like it all depends on how much horsepower you going to run I have been thinking about running a cast crank myself


sdhnc29
Member
posted December 29, 2001 05:10 PM
10-14 races before it cracks , if your lucky ! It does depend on horse power , but it also depends on compression ratio , and how hooked up your car is , and how loaded the engine stays . RPM alone wont break it , it's when you hook it up hard that you'll start cracking them . I'd spend a few $$$ extra for a good crank if it's in the budget .

------------------
Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


WPP
Member
posted December 29, 2001 05:46 PM
Steve There are alot of differt kinds of steel cranks from 4130 to 5140 4340 but will the differt steel forgeing be ok


sdhnc29
Member
posted December 29, 2001 10:59 PM
I'd stick with the 4340 ! Though the 5140 and 4130 will be stronger than a cast iron crank .

------------------
Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


mod777
Member
posted December 30, 2001 09:26 AM
Yes , I'd probably go with the new Callies Dragon Slayer crank , or a Cola . Both are very reasonably priced for the quality put into them . Both weigh right around 50lbs , I think . I doubt if you'd ever break one in you life time !! Might be a family heirloom one day !....LOL

------------------
Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


FS93
Member
posted December 30, 2001 08:59 PM
I must be the luckiest person on earth. The 406 motor that came in my modified has over 4 seasons of racing on it, with nothing but new bearings and rings. Balanced, 12:1 compression,on alky, guess about 6500(no tach). And I am not losing anything down the straights to other cars. running on 1/**i and 3/8 tracks. Hope it lasts another one.


charlie_two
Member
posted January 05, 2002 04:13 PM
i ran the motor in my mod for two seasons never changed the bearings or rings. never felt any power loss but i also ran dry slick tracks. the motor was a 350 that had stock crank and rods(good bolts) and cheap forged pistons. all i done was assembled it. a "supposed" to be good engine builder did all the machine work to it. so not to bad considering i turned it 7000 and a little more everytime i raced it.


charlie_two
Member
posted January 05, 2002 04:15 PM
also motor had 12 to 1 comp.


Back to the Archives