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Hemi #4 cam groove (GEN 2) #1765416 02/28/15 07:15 PM 02/28/15 07:15 PM
Joined: Dec 2006 Posts: 3,395 Pa Hot 340 OP master
Hot 340 OP master Joined: Dec 2006 Posts: 3,395 Pa	We got a new comp cam, small solid roller with no groove in the #4 journal. Is there a good reason why it isnt there? Or should I put it in?

Re: Hemi #4 cam groove (GEN 2) [Re: Hot 340] #1765417 03/01/15 12:44 AM 03/01/15 12:44 AM
Joined: Jan 2012 Posts: 2,647 Stuttgart, Arkansas rickseeman master
rickseeman master Joined: Jan 2012 Posts: 2,647 Stuttgart, Arkansas	I wouldn't put it in. 2011 Drag Pak Challenger

Re: Hemi #4 cam groove (GEN 2) [Re: Hot 340] #1765418 03/01/15 02:34 AM 03/01/15 02:34 AM
Joined: Aug 2003 Posts: 43,185 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,185 Bend,OR USA	I make sure all my roller cam motors oil the rockers full time I will restrict them as needed Oiling the rockers full time helps a bunch on cooling the valve springs Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Hemi #4 cam groove (GEN 2) [Re: rickseeman] #1765419 03/01/15 03:09 PM 03/01/15 03:09 PM
Joined: Dec 2006 Posts: 3,395 Pa Hot 340 OP master
Hot 340 OP master Joined: Dec 2006 Posts: 3,395 Pa	Quote: I wouldn't put it in. You wouldnt put the cam in or the groove in?

Re: Hemi #4 cam groove (GEN 2) [Re: Cab_Burge] #1765420 03/01/15 03:12 PM 03/01/15 03:12 PM
Joined: Dec 2006 Posts: 3,395 Pa Hot 340 OP master
Hot 340 OP master Joined: Dec 2006 Posts: 3,395 Pa	Quote: I make sure all my roller cam motors oil the rockers full time I will restrict them as needed Oiling the rockers full time helps a bunch on cooling the valve springs Cab, why open it up just to restrict it back down? How do you restrict it? Carb jet tapped into galley somewhere?

Re: Hemi #4 cam groove (GEN 2) [Re: Hot 340] #1765421 03/01/15 03:17 PM 03/01/15 03:17 PM
Joined: Jan 2011 Posts: 4,785 Utah and Alaska astjp2 master
astjp2 master Joined: Jan 2011 Posts: 4,785 Utah and Alaska	To maintain oil pressure to the bearings... 1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta I didn't do 4 years and 9 months of Graduate School to be called Mister!

Re: Hemi #4 cam groove (GEN 2) [Re: astjp2] #1765422 03/01/15 03:25 PM 03/01/15 03:25 PM
Joined: Dec 2006 Posts: 3,395 Pa Hot 340 OP master
Hot 340 OP master Joined: Dec 2006 Posts: 3,395 Pa	Quote: To maintain oil pressure to the bearings... I get that. Im just asking why open it up to close it back off. Does not having the groove starve the valve train and grooving the cam over flood it?

Re: Hemi #4 cam groove (GEN 2) [Re: Hot 340] #1765423 03/01/15 04:35 PM 03/01/15 04:35 PM
Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada R RUNCHARGER I Live Here
RUNCHARGER I Live Here R Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada	Hence the jet to control the amount. Sheldon

Re: Hemi #4 cam groove (GEN 2) [Re: Hot 340] #1765424 03/01/15 05:37 PM 03/01/15 05:37 PM
Joined: Jan 2012 Posts: 2,647 Stuttgart, Arkansas rickseeman master
rickseeman master Joined: Jan 2012 Posts: 2,647 Stuttgart, Arkansas	Quote: Quote: I wouldn't put it in. You wouldnt put the cam in or the groove in? Wouldn't put in a cam without the groove. Hemi's have the groove. Have had for 50 years. Let's not try to make this harder than it is. Hemi's have the groove. If your cam doesn't, have them make you one right. 2011 Drag Pak Challenger

Re: Hemi #4 cam groove (GEN 2) [Re: rickseeman] #1765425 03/01/15 05:46 PM 03/01/15 05:46 PM
Joined: Dec 2006 Posts: 3,395 Pa Hot 340 OP master
Hot 340 OP master Joined: Dec 2006 Posts: 3,395 Pa	Quote: Quote: Quote: I wouldn't put it in. You wouldnt put the cam in or the groove in? Wouldn't put in a cam without the groove. Hemi's have the groove. Have had for 50 years. Let's not try to make this harder than it is. Hemi's have the groove. If your cam doesn't, have them make you one right. My thinking too. Thanks

Re: Hemi #4 cam groove (GEN 2) [Re: Hot 340] #1765426 03/01/15 06:40 PM 03/01/15 06:40 PM
Joined: Dec 2006 Posts: 3,395 Pa Hot 340 OP master
Hot 340 OP master Joined: Dec 2006 Posts: 3,395 Pa	This cam DOES have oil holes through the #4. Did hemi cams use a combination of them both?

Re: Hemi #4 cam groove (GEN 2) [Re: Hot 340] #1765427 03/01/15 06:55 PM 03/01/15 06:55 PM
Joined: Jan 2011 Posts: 137 Daytona Beach, FL C cknight member
cknight member C Joined: Jan 2011 Posts: 137 Daytona Beach, FL	The 426 Hemi cams should have both the timed holes in #4 journal, and the groove. Regards, Chase

Re: Hemi #4 cam groove (GEN 2) [Re: Hot 340] #1765428 03/01/15 07:00 PM 03/01/15 07:00 PM
Joined: Aug 2003 Posts: 43,185 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,185 Bend,OR USA	Quote: This cam DOES have oil holes through the #4. Did hemi cams use a combination of them both? I've seen a old Crane solid roller cam that had both, that is where I got the idea of having all my solid roller cams grooved to oil the rockers full time To answer your other question on restricting the oil to the rocker shafts it depends on which type rocker arms your using and the oil weight and oil pressures in the motor as well as how well the heads drain the oil back to the oil pan On full roller rocker arms I'll use a .040 restrictor on each side, I drill and tap the oil passage in the block to use a #6x32 thread so I can use a #6 brass set screw with a allen head on one end and drill it to the size I want You can do the same thing in the head oil passage, which is easeir to change later On a bushed or non bushed(non roller rocker arm) rocker arm set up I'll start with a .080 oil hole in the set screw and see how that works on that motor The new replacement World Mopar iron blocks come with a .040 oil restrictor in them stock Last edited by Cab_Burge; 03/01/15 07:01 PM. Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Hemi #4 cam groove (GEN 2) [Re: Hot 340] #1765429 03/02/15 04:51 PM 03/02/15 04:51 PM
Joined: Jan 2003 Posts: 75,012 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,012 U.S.S.A.	Quote: This cam DOES have oil holes through the #4. Did hemi cams use a combination of them both? Yes it should have both , take it to a machine shop and have the groove added , not a big deal. But with that said , Hi RPM Hemis can suffer spinning rod bearings on the rods fed by #4 main. The better thing to do is the block the ports at the cam bearing and make it full time oiling in the lifter valley by feeding the oil passages to the head from the main galleys and then restricing the amount of oil to the head.

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