Instead of lifter bushings, has anyone just bored out to .937 lifter diameter ?

If you install bushings, what is the OD of the bushing ?

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.

Olds Rocket, diesel and 425/455 big block: .921" tappet

A rare bump. I find it hard to believe more are not interested in this topic.

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.

FWIW, this was mine in the BHJ lifter true fixturing.
AG.

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.

INTMD8, I was thinking more about using a stronger more robust lifter on an existing cam, for reliability's sake.

The oil band argument is a good one, that could negate the deal.

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.

I'm also surprised that this is not a more common subject especially since mopar delivered some blocks with lifter bores of .912. I bought a block that unknowingly to me did have all 16 lifter bores at .912. It took me some time to determine where my oil pressure was going after the engine warmed up. I finally figured it out and was lucky to buy 16 of the last 52 lifters in mopar inventory. Since it cost so much to bush lifters I will definitely try a resurface on the lifters I have. If there were other reasonably priced options I would definitely consider them. I'm lucky that the block is currently sitting awaiting determination on what I want to do with it. Anyone had this problem before?

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 prime one of my stock unbush motors with the valley pan off, the lifter bores on most stock Mopar block leak a large amount of oil from them, A BUNCH
Those stock type blocks converted to busing with don't
In my opinion, after having one roller valve spring break years ago, allowing the lifter to be pushed out and cocked high enough in the stock lifter bore to unshroud that oil galley losing all pressure at 5600 RPM in high gear
My goal now is to have every stock block bush that will get a roller cam in it

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.

Jesel doesn't have the OD on their website. I have not called to inquire.
I recall reading somewhere that their SMALLER bushings are 1.060" OD.
I don't think that leaves a lot of original meat left on the OE bore.

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.

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.

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