Re: Aluminum block. Bush lifter bores or not?
[Re: galen]
#3218899
03/07/24 05:44 PM
03/07/24 05:44 PM
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Joined: Jan 2003
Posts: 19,361
Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,361
Las Vegas
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What is the intended use for the block?
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Aluminum block. Bush lifter bores or not?
[Re: Al_Alguire]
#3218919
03/07/24 06:54 PM
03/07/24 06:54 PM
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Joined: May 2009
Posts: 831
Missouri
galen
OP
super stock
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OP
super stock
Joined: May 2009
Posts: 831
Missouri
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Al 90% street. 572 hemi. Some local track street car events. nothing competitive. Cost is not the issue, Longevity is a concern between freshen up..
Last edited by galen; 03/07/24 07:12 PM.
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Re: Aluminum block. Bush lifter bores or not?
[Re: jwb123]
#3218995
03/07/24 10:55 PM
03/07/24 10:55 PM
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Joined: Jan 2012
Posts: 2,636
Stuttgart, Arkansas
rickseeman
master
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master
Joined: Jan 2012
Posts: 2,636
Stuttgart, Arkansas
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My guess is the lifters are going to be tight. So the real cost to bush is $1,000 minus his price to hone. That will make it easier for you to decide because the bush price is now reduced. With all that said I still wouldn't bush. But thats just me.
2011 Drag Pak Challenger
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Re: Aluminum block. Bush lifter bores or not?
[Re: AndyF]
#3219002
03/07/24 11:30 PM
03/07/24 11:30 PM
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Joined: May 2009
Posts: 831
Missouri
galen
OP
super stock
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OP
super stock
Joined: May 2009
Posts: 831
Missouri
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Ask KB if they have any feedback. My guess is that you wouldn't need bushings since you have drilled oil galleries. So the lifters are going to be flooded with oil whenever the engine has oil pressure. I suppose it might depend on how big the valve springs are. If you run an Accusump the engine will have oil pressure during cranking so the lifters will always be operating on an oil film. Andy I will be running an accusump for prelube and a little safety cushion. When I last talked to Tim Banning. At that time he said it is personal preference. If unbushed run a .060 restrictor at the rear of block in each lifter galley. He said if running bushings put a .023 to .025 oil hole in each bushing if lifters have pressurized oiling. Valve spring open pressure in the 650lb. range. It is a street engine so looking for best option for its intended use. I always appreciate the input on this site. Galen
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Re: Aluminum block. Bush lifter bores or not?
[Re: rickseeman]
#3219003
03/07/24 11:35 PM
03/07/24 11:35 PM
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Joined: May 2009
Posts: 831
Missouri
galen
OP
super stock
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OP
super stock
Joined: May 2009
Posts: 831
Missouri
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My guess is the lifters are going to be tight. So the real cost to bush is $1,000 minus his price to hone. That will make it easier for you to decide because the bush price is now reduced. With all that said I still wouldn't bush. But thats just me. Thanks Rick. I thought if I could get away without bushing them it gives me an option down the road if the bores wear out or I damage a lifter. Appreciate the response. Galen
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Re: Aluminum block. Bush lifter bores or not?
[Re: galen]
#3219035
03/08/24 05:51 AM
03/08/24 05:51 AM
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Joined: Jan 2003
Posts: 2,915
A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,915
A shed in England
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Just for info, we got our KB block in 2009. We've ran it since then with no lifter oiling and no bushing. Always used solid roller cams and we have had no issues
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: Aluminum block. Bush lifter bores or not?
[Re: Tig]
#3219041
03/08/24 08:22 AM
03/08/24 08:22 AM
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Joined: Aug 2008
Posts: 4,066
Mo.
racerx
master
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master
Joined: Aug 2008
Posts: 4,066
Mo.
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Just for info, we got our KB block in 2009. We've ran it since then with no lifter oiling and no bushing. Always used solid roller cams and we have had no issues Tig did you all use some sort of prelude (Peters/accusump )?
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Re: Aluminum block. Bush lifter bores or not?
[Re: Tig]
#3219043
03/08/24 08:34 AM
03/08/24 08:34 AM
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Joined: May 2005
Posts: 1,966
Apollo, PA.
B1MAXX
top fuel
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top fuel
Joined: May 2005
Posts: 1,966
Apollo, PA.
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Just for info, we got our KB block in 2009. We've ran it since then with no lifter oiling and no bushing. Always used solid roller cams and we have had no issues X2
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Re: Aluminum block. Bush lifter bores or not?
[Re: B1MAXX]
#3219044
03/08/24 08:34 AM
03/08/24 08:34 AM
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Joined: May 2005
Posts: 1,966
Apollo, PA.
B1MAXX
top fuel
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top fuel
Joined: May 2005
Posts: 1,966
Apollo, PA.
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Just for info, we got our KB block in 2009. We've ran it since then with no lifter oiling and no bushing. Always used solid roller cams and we have had no issues X2 no pre lube either.
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Re: Aluminum block. Bush lifter bores or not?
[Re: racerx]
#3219055
03/08/24 10:32 AM
03/08/24 10:32 AM
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Joined: Jan 2003
Posts: 2,915
A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,915
A shed in England
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Just for info, we got our KB block in 2009. We've ran it since then with no lifter oiling and no bushing. Always used solid roller cams and we have had no issues Tig did you all use some sort of prelude (Peters/accusump )? Didn't for many years, fitted an accusump after the car developed a habit of wheelstanding. Though we always pre-lubed the engine with a drill if it had been standing for a couple of weeks or so.
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: Aluminum block. Bush lifter bores or not?
[Re: galen]
#3219068
03/08/24 11:23 AM
03/08/24 11:23 AM
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Joined: Jan 2003
Posts: 30,998
Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 30,998
Oregon
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Ask KB if they have any feedback. My guess is that you wouldn't need bushings since you have drilled oil galleries. So the lifters are going to be flooded with oil whenever the engine has oil pressure. I suppose it might depend on how big the valve springs are. If you run an Accusump the engine will have oil pressure during cranking so the lifters will always be operating on an oil film. Andy I will be running an accusump for prelube and a little safety cushion. When I last talked to Tim Banning. At that time he said it is personal preference. If unbushed run a .060 restrictor at the rear of block in each lifter galley. He said if running bushings put a .023 to .025 oil hole in each bushing if lifters have pressurized oiling. Valve spring open pressure in the 650lb. range. It is a street engine so looking for best option for its intended use. I always appreciate the input on this site. Galen Those aren't killer springs and you'll be pre-lubed so I'd just check the fit on the lifters and run them if the clearance is correct. I assume the car is kept in a garage so it won't develop rust or corrosion problems inside the engine.
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Re: Aluminum block. Bush lifter bores or not?
[Re: AndyF]
#3219091
03/08/24 01:21 PM
03/08/24 01:21 PM
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Joined: Jan 2003
Posts: 19,361
Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,361
Las Vegas
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IMO it is not a necessary thing since you are staying with a stock lifter diameter and mainly a street car with very mild spring load. FWIW I have run a LOT more spring pressure on a non bushed KB block with no issues. I always have an accumulator on my wet sump hoopties.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Aluminum block. Bush lifter bores or not?
[Re: galen]
#3219142
03/08/24 06:36 PM
03/08/24 06:36 PM
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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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My KB street wedge aluminum block came with bushings  I would have them added by a good shop so I wouldn't have to worry about not having them. I have one set of the older special Crane chrome solid roller lifters design to be run in aluminum blocks with no bushings.  I may end up running them in my new 572 C.I race motor with that block, maybe not 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Aluminum block. Bush lifter bores or not?
[Re: Cab_Burge]
#3219308
03/09/24 02:49 PM
03/09/24 02:49 PM
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Joined: Dec 2021
Posts: 1,118
Loudoun County, VA
Brad_Haak
super stock
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super stock
Joined: Dec 2021
Posts: 1,118
Loudoun County, VA
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I was expecting the majority of the replies to say add the bushings... surprised to hear the bare aluminum bores hold up
2021 Challenger 6.4L Scat Pack 1320
100% stock: 1.680, 11.894 at 113.75 (DA 175 ft)
weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008]
pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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Re: Aluminum block. Bush lifter bores or not?
[Re: B1MAXX]
#3219902
03/12/24 08:50 AM
03/12/24 08:50 AM
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Joined: Jan 2003
Posts: 13,357
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,357
Marion, South Carolina [><]
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Just for info, we got our KB block in 2009. We've ran it since then with no lifter oiling and no bushing. Always used solid roller cams and we have had no issues X2  Same here. Been running my KB block since 2006 w/ no lifter oiling and no problems at all. Street and strip w/ a solid roller cam. No prelube either.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
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'71 Demon, 340, low gear 904, 8.75
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'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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