Re: Bushed lifter bore question
[Re: varunner]
#2461814
03/06/18 01:09 AM
03/06/18 01:09 AM
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Joined: Oct 2006
Posts: 1,264 New York, USA
Chargerfan68
pro stock
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pro stock
Joined: Oct 2006
Posts: 1,264
New York, USA
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As doug said, i had my machinist put .030” holes on the bushings for a little oiling. But mine is a race application only, so it mostly gets splash oiling. I would never depend on only a .030” hole for any street application , but thats just me. I could barely see tha .030” holes. I actually thought he forgot to drill them until i looked real good for them. Thats how small they are.
1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.
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Re: Bushed lifter bore question
[Re: varunner]
#2461815
03/06/18 01:11 AM
03/06/18 01:11 AM
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Joined: Oct 2006
Posts: 1,264 New York, USA
Chargerfan68
pro stock
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pro stock
Joined: Oct 2006
Posts: 1,264
New York, USA
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Is it only race? Any street or extented idling at all?
Last edited by Chargerfan68; 03/06/18 01:11 AM.
1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.
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Re: Bushed lifter bore question
[Re: varunner]
#2461873
03/06/18 03:34 AM
03/06/18 03:34 AM
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Joined: Aug 2003
Posts: 43,127 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,127
Bend,OR USA
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In a BB, how are solid lifters lubricated when the bores are bushed ? Solid lifters or solid roller lifters? If solid roller they should have a oil hole in the oil gallery into the bushing, .030 to .090 depending on the shop doing the work If not rollers no need for any other oiling I need to go pickup my 400 block now after having bushings installed in it to seal the oil galleys up at max lift with the Comp Cams solid roller lifters set up for pushrod oiling, that shop put a .060 oil hole in the bushings I had assembled the motor and primed it and found out it only had 20 Lbs. of oil pressure with the comp lifters, I swapped them to a set of regular Cranes solid rollers I had in the cabinet and had zero oil pressure with them This motor has a set of Jesel paired shaft rockers hence the need for pushrod oiling Onwards and upwards
Last edited by Cab_Burge; 03/06/18 03:35 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Bushed lifter bore question
[Re: RobR]
#2462031
03/06/18 03:31 PM
03/06/18 03:31 PM
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Joined: Nov 2004
Posts: 3,544 Syracuse,NY
CompWedgeEngines
master
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master
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
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I've been bushing blocks since the early 80's..BHJ fixture..I run cast bushings and I've used splash only on the street and also a .030 to .050 hole no real difference in wear with the cast.. In the late 70's I tried bronze for the half dozen or so engines with splash only and when it came to freshen there were some that needed to be replaced.. Mickey at BHJ told me to try his cast bushings and I've never used bronze after that...very good service life with cast on the street.. I switched bronze bushing manufacturers, ( got away from BHJ) and they look much much better long term, and hone nicer. Just my experience.
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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Re: Bushed lifter bore question
[Re: varunner]
#2462038
03/06/18 03:49 PM
03/06/18 03:49 PM
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Joined: Dec 2005
Posts: 11,530 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,530
Fulton County, PA
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With the amount of oil being slung around in an engine, I wouldn't add 16 .030 oil leaks unless I had pushrods oiling the top end. .030 is a huge hole when there's 60 or 70 PSI behind it. I oiled a complete top end with bushed rockers at 7400 through a .045 jet with a minimum amount of wear showing. Bushed lifter bores and oil to the cam bearings restricted as well. Hundreds of runs at 7400. My goal was to minimize the amount of oil flying around doing nothing but getting aerated and get it onto the crank.
If the results don't match the theory, change the theory.
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Re: Bushed lifter bore question
[Re: varunner]
#2462751
03/07/18 07:59 PM
03/07/18 07:59 PM
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Joined: Jan 2003
Posts: 14,492 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
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Solid flat tappets in a race only application?
If the clearance is right....... You're good without the holes.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Bushed lifter bore question
[Re: dogdays]
#2462838
03/07/18 10:39 PM
03/07/18 10:39 PM
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Joined: Sep 2003
Posts: 2,175 Duloc
The Shadow
top fuel
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top fuel
Joined: Sep 2003
Posts: 2,175
Duloc
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IF you're talking about CAST IRON then the answer is simple. The carbon flakes in the cast iron provide some lubrication.
R. I think you mean graphite flakes not carbon
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Re: Bushed lifter bore question
[Re: BradH]
#2463101
03/08/18 02:32 PM
03/08/18 02:32 PM
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Joined: Dec 2005
Posts: 11,530 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,530
Fulton County, PA
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Everyone who hears the size of those holes always acts shocked and tells me they're way too big. Well, they're a He11uva lot smaller than the size of the galley opening in an unbushed lifter bore, and the engine had no oil pressure issues on the dyno either at idle or WOT up to 7200 RPM.
One of the reasons for bushings is to eliminate those huge oil leaks. I didn't have oil pressure issues either, looking at the gauge. But my rod bearings sure appreciated it when I started fixing the internal leaks.
If the results don't match the theory, change the theory.
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Re: Bushed lifter bore question
[Re: BradH]
#2463486
03/09/18 12:49 AM
03/09/18 12:49 AM
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Joined: Aug 2003
Posts: 43,127 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,127
Bend,OR USA
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I picked up my 400 block from the machine shop in Vancouver, WA this afternoon, they put lifter bushings in it with .060 holes in them ,according to them It is to late to unload it tonight due to cold, ice in the drive way and my old cautious age I'll unload it tomorrow morning and get it into the assembly room and take a good hard look at it after cleaning it thoroughly and putting it on a engine stand, again. Hopefully the low oil pressure issue is gone and it lubricates through the pushrods properly with better oil pressure More info on this later when I'm done
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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