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BB pushrods: Oil-through or not? #1644859 07/10/14 06:13 AM 07/10/14 06:13 AM
Joined: Feb 2006 Posts: 79 Germany JS23U OP member
JS23U OP member Joined: Feb 2006 Posts: 79 Germany	My RB-engine has valvetrain oiling through the rocker shafts. Do the new pushrods that I will have to order have to be solid or can they be of the "oil-through"-style? Oil-through are readily available, solid don't seem to be. Will I have to worry about it? More oil consumption with the oil-through ones?

Re: BB pushrods: Oil-through or not? [Re: JS23U] #1644860 07/10/14 06:20 AM 07/10/14 06:20 AM
Joined: Jan 2003 Posts: 10,011 Frostbitefalls MN (Rocky&Bullw... gregsdart I Live Here
gregsdart I Live Here Joined: Jan 2003 Posts: 10,011 Frostbitefalls MN (Rocky&Bullw...	I run a spray bar system and oil through the pushrods as well, no problems. Run the oil through pushrods, it should be just fine. 8..603 156 mph best, 2905 lbs 549, indy 572-13, alky

Re: BB pushrods: Oil-through or not? [Re: JS23U] #1644861 07/10/14 12:13 PM 07/10/14 12:13 PM
Joined: Jan 2003 Posts: 75,071 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,071 U.S.S.A.	BB never oiled thru the pushrods , plenty of splash , though it's not a bad idea to add it if you are running high spring pressures , one less thing to worry about , if it's a stockish build then you should be fine. If you are getting custom length pushrods you can specify oil thru or not. There won't be any oil consumption, just more oil going down the center of the block back to the pan and probably a slight oil pressure drop because you have oil going thru more flow paths.

Re: BB pushrods: Oil-through or not? [Re: JS23U] #1644862 07/10/14 12:25 PM 07/10/14 12:25 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Your gonna order the oil through push rods... the lifter is what tells it weather its gonna oil through the push rod or not but you still want oil through even with the oiling system you have

Re: BB pushrods: Oil-through or not? [Re: MR_P_BODY] #1644863 07/10/14 05:06 PM 07/10/14 05:06 PM
Joined: Feb 2006 Posts: 79 Germany JS23U OP member
JS23U OP member Joined: Feb 2006 Posts: 79 Germany	Lifters are compcams 822-16 which have an orifice for sending metered oil through the pushrod. The engine is just a little above stock with a bit over 300 lbs spring pressure at open valve. So if I understand your comments right I am ok to order oil-through pusrods. Thanks for all your help!

Re: BB pushrods: Oil-through or not? [Re: JS23U] #1644864 07/10/14 05:54 PM 07/10/14 05:54 PM
Joined: Aug 2003 Posts: 43,252 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,252 Bend,OR USA	Quote: Lifters are compcams 822-16 which have an orifice for sending metered oil through the pushrod. The engine is just a little above stock with a bit over 300 lbs spring pressure at open valve. So if I understand your comments right I am ok to order oil-through pusrods. Thanks for all your help! It doesn't really matter on the oil hole or no oil hole for your application, I wouldn't order them with the holes I've ran many motors with solid lifters with175 lbs on the seats and 375 lbs open with a non oil hole pushrods, the round contact surface on the end of the ball and inside the cup is greater without the holes than with the holes Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: BB pushrods: Oil-through or not? [Re: JS23U] #1644865 07/10/14 06:06 PM 07/10/14 06:06 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Lifters are compcams 822-16 which have an orifice for sending metered oil through the pushrod. The engine is just a little above stock with a bit over 300 lbs spring pressure at open valve. So if I understand your comments right I am ok to order oil-through pusrods. Thanks for all your help! I wouldnt worry about the oil in the push rods.. at least if you wanted to change to push rod oiling your set and at your open pressures it wont matter at all about loading area on the balls... I run close to 900# on the oil through push rods and lots of rpm and they have never had any issue... ask the push rod company but if you want you can order them with a .040 restriction (maybe less) to keep the oil down a bit

Re: BB pushrods: Oil-through or not? [Re: Cab_Burge] #1644866 07/10/14 06:15 PM 07/10/14 06:15 PM
Joined: Jan 2003 Posts: 75,071 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,071 U.S.S.A.	Quote: Quote: Lifters are compcams 822-16 which have an orifice for sending metered oil through the pushrod. The engine is just a little above stock with a bit over 300 lbs spring pressure at open valve. So if I understand your comments right I am ok to order oil-through pusrods. Thanks for all your help! It doesn't really matter on the oil hole or no oil hole for your application, I wouldn't order them with the holes I've ran many motors with solid lifters with175 lbs on the seats and 375 lbs open with a non oil hole pushrods, the round contact surface on the end of the ball and inside the cup is greater without the holes than with the holes Cab , the sets of Smith bros. pushrods I have that are solid are flat on the end so I'm a little confused ??

Re: BB pushrods: Oil-through or not? [Re: JohnRR] #1644867 07/10/14 08:15 PM 07/10/14 08:15 PM
Joined: Mar 2006 Posts: 9,863 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,863 MI, usa	I oil through the push rods. I had to restrict the oil holes in my tappets (Comp 892). The holes in the pushrods are over .100. Resulted in low oil pressure. Restricted the lifters to .040". Lesson learned, get the correct orifice. Other than that no issues. Lash stays constant. .800" lift 300# on the seat. Doug

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