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Re: Is this an engine builder's Trick? [Re: Labratt] #1192345 03/08/12 01:23 PM 03/08/12 01:23 PM
Joined: Nov 2009 Posts: 3,082 St. Paul , Mn. tubtar master
tubtar master Joined: Nov 2009 Posts: 3,082 St. Paul , Mn.	Quote: Makes perfect sense to me! I agree 100% with Mike's(Sport440) assessment of the drilled hole acting like an EDM solid lifter! The oil dripping through the drilled holes is aimed more directly onto the cam lobes...instead of just a random over-flow! Yep.......I also drilled one at the rear of the valley to oil the distributor drive gear ( R-3 ) just because it seemed like a good idea. On paper , it will allow oil that would normally be stuck up there back to the pan under acceleration too. At worst , it is harmless unless you leave a sharp edge / stress riser for a crack to start at. But it seems like a good idea.

Re: Is this an engine builder's Trick? [Re: tubtar] #1192346 03/08/12 01:35 PM 03/08/12 01:35 PM
Joined: Mar 2006 Posts: 9,910 Eighty Four, PA B G Racing master
B G Racing master Joined: Mar 2006 Posts: 9,910 Eighty Four, PA	I think there is enough oil getting on the cam lifters and rotating assembly especially with solid rollers that will live with mist lubercation.The trend today is to limit the oil on the rotating parts get it back to the sump without all the windage and drag it creates and make it available for things that count like the bearing,bushings,pushrods and rockers.Even at these areas sometimes too much can be detramental.Most solid roller engines run bushed lifter bores or non drilled or plugged oil galleys. Some engines restrict the oil to the lifter galley by running return lines from the heads to the sump [IMG]http://i430.photobucket.com/albums/qq21/ajcasini/max_zpsdppwd9km.jpg[/IMG]

Re: Is this an engine builder's Trick? [Re: B G Racing] #1192347 03/08/12 05:44 PM 03/08/12 05:44 PM
Joined: Jan 2003 Posts: 644 Warner Robins, Georgia D DusterMan super street
DusterMan super street D Joined: Jan 2003 Posts: 644 Warner Robins, Georgia	Quote: We used to drill the valley for oil drain back,but with the advent of better oil systems we find it unnecessary,heck we used to polish the lifter valley before we knew better. Wow memories. Now I really feel retired and old. Of course I still smooth out rough castings everywhere. Makes it look purrty. Pete: 2003 Dodge Quad 2500 Hemi 69 RoadRunner 4 sp Alpine White 2019 Dodge Charger

Re: Is this an engine builder's Trick? [Re: DusterMan] #1192348 03/08/12 05:49 PM 03/08/12 05:49 PM
Joined: Mar 2006 Posts: 9,910 Eighty Four, PA B G Racing master
B G Racing master Joined: Mar 2006 Posts: 9,910 Eighty Four, PA	Quote: Quote: We used to drill the valley for oil drain back,but with the advent of better oil systems we find it unnecessary,heck we used to polish the lifter valley before we knew better. Wow memories. Now I really feel retired and old. Of course I still smooth out rough castings everywhere. Makes it look purrty. At my age memories out number any new ideas or thoughts. [IMG]http://i430.photobucket.com/albums/qq21/ajcasini/max_zpsdppwd9km.jpg[/IMG]

Re: Is this an engine builder's Trick? [Re: GwaiiEagle] #1192349 03/08/12 07:24 PM 03/08/12 07:24 PM
Joined: Feb 2004 Posts: 964 Nanaimo, B.C. GwaiiEagle OP Mannix
GwaiiEagle OP Mannix Joined: Feb 2004 Posts: 964 Nanaimo, B.C.	So, it is not 'just' and engine builder's trick, it is an engine builder's trick. Makes me wish I had used this block for the stroker. the block has some .022 in the hold 2257Ps It had a pre 1970 Sig Erson 312 .525 cam in it. This in a Duster with p/s p/b and hedman 1.75 hedders. Torker and a 800DP with a Torker and 11 inch converter. With a 3.23 gear!

Re: Is this an engine builder's Trick? [Re: GwaiiEagle] #1192350 03/09/12 11:24 AM 03/09/12 11:24 AM
Joined: Jan 2003 Posts: 75,008 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,008 U.S.S.A.	I have thought of drilling those holes because any old engine I have taken apart has sludge built up in everyone of those depression because there is always some amount of oil that never gets out of that area . Back in 03 Dulchic added a series of formed alum shields under the cam to redirect the oil to the bulkheads so as to keep the oil from draining directly down on the rotating assembly ... I ASSuME ??? ... granted this was for a DYNO only competition so maybe it's fine for something that has limited use and life ? I've had thoughts of adding the shield to a couple of my builds , my question is does the cam need the spray of oil be flung off the rotating assembly to live ? It seems it would be also a good idea on an engine using a roller cam to keep the needles from a roller failure out of the bottom end ? Last edited by JohnRR; 03/09/12 04:37 PM.

Re: Is this an engine builder's Trick? [Re: JohnRR] #1192351 03/09/12 01:54 PM 03/09/12 01:54 PM
Joined: Oct 2007 Posts: 3,884 Oregon hooziewhatsit master
hooziewhatsit master Joined: Oct 2007 Posts: 3,884 Oregon	Quote: I have thought of drilling those holes because any old engine I have taken apart has sludge built up in everyone of those depression because there is always some amount oof oil that never gets out of that area . ..... It seems it would be also a good idea on an engine using a roller cam to keep the needles from a roller failure out of the bottom end ? I was thinking that as well after the latest 'kerosene oil change' thread. Seems like it would be one less sludge point. I do like the idea of putting fine mesh over all the opening to prevent debris from failures from reaching the bottom end If you ever find yourself in a fair fight, your tactics suck.

Re: Is this an engine builder's Trick? [Re: JohnRR] #1192352 03/09/12 02:13 PM 03/09/12 02:13 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: I have thought of drilling those holes because any old engine I have taken apart has sludge built up in everyone of those depression because there is always some amount oof oil that never gets out of that area . Back in 03 Dulchic added a series of formed alum shields under the cam to redirect the oil to the bulkheads so as to keep the oil from draining directly down on the rotating assembly ... I ASSuME ??? ... granted this was for a DYNO only competition so maybe it's fine for something that has limited use and life ? I've had thoughts of adding the shield to a couple of my builds , my question is does the cam need the spray of oil be flung off the rotating assembly to live ? It seems it would be also a good idea on an engine using a roller cam to keep the needles from a roller failure out of the bottom end ? With the advent of the new roller lifters that use the edm oil hole to oil the roller/axle you really dont need any added oil... even if not using a roller lifter there is still a fair amount of oil that gets by the lifter and the lifter bore thats drips down there... I am using the edm rollers so hopefully I can have the engine idle at a lower rpm(street rod)

Re: Is this an engine builder's Trick? [Re: MR_P_BODY] #1192353 03/09/12 09:27 PM 03/09/12 09:27 PM
Joined: Jun 2004 Posts: 1,496 Sask, Can. 7 72demon416 pro stock
72demon416 pro stock 7 Joined: Jun 2004 Posts: 1,496 Sask, Can.	Quote: Quote: Not drilling them provides a place for some of the trash from my broken rocker arm needle bearings to collect! Better than running the stuff through the oil pump! I still glue screen over ALL the openings on the top That's a good idea What do you use for screen and glue?

Re: Is this an engine builder's Trick? [Re: 72demon416] #1192354 03/09/12 09:33 PM 03/09/12 09:33 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: Quote: Quote: Not drilling them provides a place for some of the trash from my broken rocker arm needle bearings to collect! Better than running the stuff through the oil pump! I still glue screen over ALL the openings on the top That's a good idea What do you use for screen and glue? I use door screen and JB Weld to glue it in.... not the plastic screen stuff

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