Re: Bore out lifter bores to .937 ?
[Re: hemienvy]
#3087981
10/21/22 05:42 AM
10/21/22 05:42 AM
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Joined: Aug 2005
Posts: 774 Southington Ct.
turbobitt
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super stock
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Southington Ct.
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I'm going through this now. The BHJ lifter tooling my machine shop used was cutting the bores to .992" so we had BHJ make bushings to fit that with the appropriate press. Typically the standard is 1.0000" To be honest I'm sure cutting the bore to .937 would work but the oil intersection feed hole starts getting really big at that point and may just bleed to much oil. AG.
Last edited by turbobitt; 10/21/22 05:45 AM.
1970 Challenger w/572 Hemi street car and my pride and joy.
1986 T-Type with 272 Stage 2 Buick V6 engine - True 8 second street car. Just updated the engine and put down 928 HP @ 35# boost to the ground on chasis dyno.
1976 Cee Bee Avenger Jet Boat - 460 Ford powered.
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Re: Bore out lifter bores to .937 ?
[Re: hemienvy]
#3088099
10/21/22 03:06 PM
10/21/22 03:06 PM
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Joined: Oct 2007
Posts: 4,219 New York
polyspheric
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master
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Posts: 4,219
New York
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Olds Rocket, diesel and 425/455 big block: .921" tappet
Boffin Emeritus
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Re: Bore out lifter bores to .937 ?
[Re: hemienvy]
#3088393
10/22/22 08:39 PM
10/22/22 08:39 PM
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Joined: Jan 2003
Posts: 7,521 Minnesota
Hemi_Joel
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Minnesota
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Probably because most if not all of the machine shops put in bushings. But you might be on to something. Maybe it will become a trend? The bushings do have the benefit of oil control.
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: Bore out lifter bores to .937 ?
[Re: Hemi_Joel]
#3088428
10/22/22 11:26 PM
10/22/22 11:26 PM
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Joined: Aug 2005
Posts: 774 Southington Ct.
turbobitt
super stock
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super stock
Joined: Aug 2005
Posts: 774
Southington Ct.
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FWIW, this was mine in the BHJ lifter true fixturing. AG.
1970 Challenger w/572 Hemi street car and my pride and joy.
1986 T-Type with 272 Stage 2 Buick V6 engine - True 8 second street car. Just updated the engine and put down 928 HP @ 35# boost to the ground on chasis dyno.
1976 Cee Bee Avenger Jet Boat - 460 Ford powered.
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Re: Bore out lifter bores to .937 ?
[Re: hemienvy]
#3088434
10/23/22 01:34 AM
10/23/22 01:34 AM
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Joined: May 2019
Posts: 722 Lake Villa Il
INTMD8
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super stock
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Lake Villa Il
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A rare bump. I find it hard to believe more are not interested in this topic. I think maybe because of what was mentioned, the oil hole is huge to start and only gets bigger. If you're running enough lobe lift that could benefit a .937 lifter I think it would be tough to -not- uncover that oil gallery.
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
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Re: Bore out lifter bores to .937 ?
[Re: hemienvy]
#3088493
10/23/22 08:21 AM
10/23/22 08:21 AM
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Joined: Jan 2003
Posts: 6,163 Melbourne , Australia
LA360
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master
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Melbourne , Australia
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I think anyone going up to 0.937" in lifter diameter, would want the oil control a bushing can provide.
That being said, with tie bar lifters in this diameter being more common, it might be something you start seeing more often.
Alan Jones
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Re: Bore out lifter bores to .937 ?
[Re: Blucuda413]
#3097814
11/28/22 03:15 PM
11/28/22 03:15 PM
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Joined: Dec 2021
Posts: 1,319 Loudoun County, VA
Brad_Haak
pro stock
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pro stock
Joined: Dec 2021
Posts: 1,319
Loudoun County, VA
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My concern with a basic passenger car block is how much meat there is for the lifters when they're taken that much further out plus the OD of the bronze bushing for oil control. Here's what mine look like with a standard 440 block, .904 lifters plus bronze bushings.
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: Bore out lifter bores to .937 ?
[Re: Brad_Haak]
#3097820
11/28/22 03:32 PM
11/28/22 03:32 PM
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Joined: Jan 2003
Posts: 13,492 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
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Marion, South Carolina [><]
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My concern with a basic passenger car block is how much meat there is for the lifters when they're taken that much further out plus the OD of the bronze bushing for oil control. Here's what mine look like with a standard 440 block, .904 lifters plus bronze bushings. I recently saw a hemi block w/ lifter bushings that broke the whole lifter boss off. It was an early megablock that didn't have all the extra meat cast into the bosses. It broke on either #1 or #2 cylinder...can't recall exactly which.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 4 speed, Dana 60 '71 Demon 340, no drivetrain, on blocks behind the barn '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Bore out lifter bores to .937 ?
[Re: Brad_Haak]
#3097951
11/28/22 10:45 PM
11/28/22 10:45 PM
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Joined: Oct 2007
Posts: 4,219 New York
polyspheric
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master
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New York
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What's the OD/ID of the bushing and what material used?
BB Buicks (400, 430, 455) have notoriously weak lifter banks, and split from too much power NA: be careful.
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Re: Bore out lifter bores to .937 ?
[Re: hemienvy]
#3097996
11/29/22 07:02 AM
11/29/22 07:02 AM
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Joined: Oct 2007
Posts: 4,219 New York
polyspheric
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Thanks, that's thinner wall than I would have guessed. I'm working on an engine with .990" tappets being bushed down to take a different roller tappet.
Boffin Emeritus
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Re: Bore out lifter bores to .937 ?
[Re: an8sec70cuda]
#3098013
11/29/22 08:50 AM
11/29/22 08:50 AM
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Joined: Jan 2003
Posts: 8,079 Tulsa OK
Bad340fish
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Tulsa OK
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My concern with a basic passenger car block is how much meat there is for the lifters when they're taken that much further out plus the OD of the bronze bushing for oil control. Here's what mine look like with a standard 440 block, .904 lifters plus bronze bushings. I recently saw a hemi block w/ lifter bushings that broke the whole lifter boss off. It was an early megablock that didn't have all the extra meat cast into the bosses. It broke on either #1 or #2 cylinder...can't recall exactly which. I assume you are talking about the same one I am about to post. This was a Local guys Hemi.
68 Barracuda Formula S 340
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Re: Bore out lifter bores to .937 ?
[Re: Bad340fish]
#3098022
11/29/22 09:28 AM
11/29/22 09:28 AM
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Joined: Jan 2003
Posts: 13,492 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,492
Marion, South Carolina [><]
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My concern with a basic passenger car block is how much meat there is for the lifters when they're taken that much further out plus the OD of the bronze bushing for oil control. Here's what mine look like with a standard 440 block, .904 lifters plus bronze bushings. I recently saw a hemi block w/ lifter bushings that broke the whole lifter boss off. It was an early megablock that didn't have all the extra meat cast into the bosses. It broke on either #1 or #2 cylinder...can't recall exactly which. I assume you are talking about the same one I am about to post. This was a Local guys Hemi. Yessir! The one Wayne built. Not a lot of meat there at all. HUGE difference in that block versus the style that turbobitt posted above.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 4 speed, Dana 60 '71 Demon 340, no drivetrain, on blocks behind the barn '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Bore out lifter bores to .937 ?
[Re: an8sec70cuda]
#3098500
11/30/22 07:53 PM
11/30/22 07:53 PM
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Joined: Jan 2003
Posts: 3,511 DFW
mr_340
master
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master
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DFW
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Trend 15TrendPerform.com INNER DIAMETER OUTER DIAMETER LENGTH TYPE STOP HEIGHT RECOMMENDED BORE SIZE APPLICATION PART # MOPAR 0.875 0.995 1.380 Step 0.120 0.993 Mopar 340 02-5054 0.875 0.996 1.380 Step 0.120 0.994 Mopar oversize 02-5070 0.903 1.002 1.700 Straight n/a 1.000 BB Mopar wedge 02-5071 0.875 0.995 1.700 Step 0.120 0.993 Universal bushing 02-5075 UNIVERSAL 0.903 1.002 1.500 Step 0.120 1.000 Universal bushing 02-5072 0.903 1.002 1.600 Straight n/a 1.000 Universal bushing 02-5073 0.810 0.935 1.770 Step 0.120 0.933 Universal bushing 02-5085 0.825 0.935 1.770 Step 0.120 0.933 Universal bushing (.995" O.D. step) 02-5091 0.900 1.025 1.750 Step 0.120 1.023 Universal bushing (1.055" O.D. step) 02-5092 LIFTER BORE BUSHINGS Note: Lifter bore bushing must be bored or honed after installation. Minimum press: .001" Maximum press: .002" #609 Loctite® is recommended
Floyd Lippencott IV
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