How large of a cam with 4.75 crank in standard cam block? - Moparts Forums

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How large of a cam with 4.75 crank in standard cam block? #2049400 04/08/16 12:59 AM 04/08/16 12:59 AM
Joined: Mar 2013 Posts: 55 Nebraska T TT5 Valiant OP member
TT5 Valiant OP member T Joined: Mar 2013 Posts: 55 Nebraska	I have a 4.5 stroke and a 4.75 stroke Callies crank but would like to build the 4.75. Both cranks have 2.200 journals. This will be a nitrous deal with a 2 speed 400 1.48 or a 1.58 glide with 315 pro drag radials. The heads are B1mc with a fogger flowed by Kevin Neil. 1. How large of a nitrous grid cam will fit in a standard cam location (already have) world cast iron block with a 4.75 stroke with 2.200 journals and steel Oliver rods? 2. Is the torque from the 4.75 over a 4.5 stroke worth the extra work? Just wondering if it would make a difference from the 330' to the 1/8th?

Re: How large of a cam with 4.75 crank in standard cam block? [Re: TT5 Valiant] #2049474 04/08/16 07:46 AM 04/08/16 07:46 AM
Joined: Jan 2003 Posts: 6,392 nielsville, minn. Q quickd100 master
quickd100 master Q Joined: Jan 2003 Posts: 6,392 nielsville, minn.	My 605 runs a .767/.676 288/292@.050 on a 113C. I've got .060 lobe to rod clearance. I'm sure you can run something bigger. My 'street' motor makes 818ftlbs, I'd say the extra stroke is worth it.Dave

Re: How large of a cam with 4.75 crank in standard cam block? [Re: TT5 Valiant] #2049480 04/08/16 08:18 AM 04/08/16 08:18 AM
Joined: Mar 2006 Posts: 9,834 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,834 MI, usa	Clearance also depends on the base circle of the lobe and what rods are in it. Doug

Re: How large of a cam with 4.75 crank in standard cam block? [Re: TT5 Valiant] #2050433 04/09/16 03:17 PM 04/09/16 03:17 PM
Joined: Sep 2003 Posts: 1,049 San Jose Ca. boatracer572 super stock
boatracer572 super stock Joined: Sep 2003 Posts: 1,049 San Jose Ca.	.560 lobe 55mm cam in this 4.75" stroke standard cam Oliver rodded motor..... Last edited by boatracer572; 04/09/16 03:18 PM.

Re: How large of a cam with 4.75 crank in standard cam block? [Re: boatracer572] #2050550 04/09/16 06:39 PM 04/09/16 06:39 PM
Joined: Jan 2003 Posts: 7,489 Minnesota Hemi_Joel master
Hemi_Joel master Joined: Jan 2003 Posts: 7,489 Minnesota	Originally Posted By boatracer572 .560 lobe 55mm cam in this 4.75" stroke standard cam Oliver rodded motor..... Very nice! 2.2" crank pin I assume? Did you have to grind on the Olivers? I have heard that they are slimmer on the big end. [img]http://i.imgur.com/boeexFms.jpg[/img] 31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"

Re: How large of a cam with 4.75 crank in standard cam block? [Re: Hemi_Joel] #2050692 04/09/16 11:20 PM 04/09/16 11:20 PM
Joined: Sep 2003 Posts: 1,049 San Jose Ca. boatracer572 super stock
boatracer572 super stock Joined: Sep 2003 Posts: 1,049 San Jose Ca.	Yes, 2.200" rod journals, took about .030"of materal off the rod by the bolts on 4 rod journals.....yes they are slimmer than an aluminum grp rod by only a little bit... Last edited by boatracer572; 04/09/16 11:40 PM.

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