Previous Thread
Next Thread
Print Thread
Bushing the lifter bores #3004007
01/11/22 01:11 AM
01/11/22 01:11 AM
Joined: Jun 2016
Posts: 749
Washington
H
hemienvy Offline OP
super stock
hemienvy  Offline OP
super stock
H

Joined: Jun 2016
Posts: 749
Washington
I agree that this is generally a good idea.

What I am thinking about is the wall thickness of the bushing, I believe they are about 1/16 of an inch.

That means the lifter bores have 1/16 inch of material cut away, and on a big block, you can see that
the thickness of the cast iron forming the lifter bore is not very thick at all.

On some race blocks the lifter bore bulkhead is totally solid and thick, it's easy to see how a lifter bushing
has a lot of metal surrounding and supporting it.

With a huge cam I just wonder if lifter bushings weaken the block more than it benefits oil control.

Sort of like overboring a cylinder for a sleeve, I think sleeves are .060~~.080 thick. That's a large overbore, .120~~.160 over.
The sleeve is not part of the parent metal.

Am I looking for a problem when there isn't one ?

Re: Bushing the lifter bores [Re: hemienvy] #3004036
01/11/22 04:29 AM
01/11/22 04:29 AM
Joined: Aug 2003
Posts: 39,264
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 39,264
Bend,OR USA
Depends on the block and if you would rather spend that money on one of the new race blocks available now that are already done up scope


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Bushing the lifter bores [Re: Cab_Burge] #3004048
01/11/22 08:28 AM
01/11/22 08:28 AM
Joined: Jan 2003
Posts: 6,029
Abilene, Texas
F
fastmark Offline
master
fastmark  Offline
master
F

Joined: Jan 2003
Posts: 6,029
Abilene, Texas
If my memory serves me correctly, the very first run of Mopar performance hemi blocks had the same lifter galley design as the oem hemi blocks. One of the first changes they made was to increase those bosses. All this was to prevent the potential problem you are referring too. All super stock hemi builders bushed their blocks as part of the build. Seems like a needed upgrade on a super high lift cam.

Re: Bushing the lifter bores [Re: hemienvy] #3004053
01/11/22 09:05 AM
01/11/22 09:05 AM
Joined: Jan 2003
Posts: 3,349
Shelby Twp. Mi
HardcoreB Offline
master
HardcoreB  Offline
master

Joined: Jan 2003
Posts: 3,349
Shelby Twp. Mi
Originally Posted by hemienvy
"............ I think sleeves are .060~~.080 thick.

Depends who does yours and what they use. They are sleeved for both oil control and indexing. Mine were 1" O.D. and were done by one of the few old school people locally, there was always stuff in there from out of state. But I've NEVER heard of the block breaking in that area after this was done.

Re: Bushing the lifter bores [Re: HardcoreB] #3004147
01/11/22 02:25 PM
01/11/22 02:25 PM
Joined: Nov 2020
Posts: 348
Isle of Sheeps
Gtxxjon Offline
enthusiast
Gtxxjon  Offline
enthusiast

Joined: Nov 2020
Posts: 348
Isle of Sheeps
Now you have lol!

I have a 1972 hemi block where the lifter bore has 'let go'!
Bushed on one side to control oiling to the crank.

I assume these 72 blocks are factory replacements for the racer guys?

I was told by the seller its an ex Sox and Martin, but I see no stamps...
Painted a strange blue colour maybe Ford?

John

blue hemi 426.jpg
Last edited by Gtxxjon; 01/11/22 02:34 PM.

Carpe diem, quam minimum credula postero, thanx Horace!

There’s no point trying to fix stuff that ain’t broke,,, 'but if ain’t broke',,, you is not trying hard enough...
Re: Bushing the lifter bores [Re: Gtxxjon] #3004187
01/11/22 03:59 PM
01/11/22 03:59 PM
Joined: Feb 2010
Posts: 270
Mountain View, CA
6
68rrunner Offline
enthusiast
68rrunner  Offline
enthusiast
6

Joined: Feb 2010
Posts: 270
Mountain View, CA
Just out of curiosity, How much lift gets us in the range of unshrouding the oil passage?
I didn't have any experience with bushing a stock block, but was interested in the bushings with the roller lifter guide built in so you didn't need a cross bar. Are these not a good idea on a factory street engine?

Re: Bushing the lifter bores [Re: 68rrunner] #3004198
01/11/22 04:41 PM
01/11/22 04:41 PM
Joined: Aug 2003
Posts: 39,264
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 39,264
Bend,OR USA
Originally Posted by 68rrunner
Just out of curiosity, How much lift gets us in the range of unshrouding the oil passage?
I didn't have any experience with bushing a stock block, but was interested in the bushings with the roller lifter guide built in so you didn't need a cross bar. Are these not a good idea on a factory street engine?

it depends on which lifter and which camshaft core base circle cam whiney
i had one 1966 Street hemi block that unshrouded the driver side oil galley with a early set of solid roller lifters with the .750 diameter wheels on them, I'm not sure which brand they were but the cam was a old Crane SS cam with right at .500 lobe lift. The passenger side was good, so I block the left side galley off with a small welch plug and then had to add another one later in the car due to it turning sideways in the galley whiney shruggy
the motor was in the car when we fired it up and one or two lifters were lifting high enough to make the oil pressure bounce around between 50 to 70 lbs. cold, that problem was a challenge to find and fix., trust me wrench up We had race that motor with a solid flat tappet cam before with no issues so we knew it was something we had changed, challenging me to figure out what was causing the oil pressure problem work I got lucky on that one boogie
Bushing the lifter bores first is way better to start with up


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Bushing the lifter bores [Re: Gtxxjon] #3004461
01/12/22 09:30 AM
01/12/22 09:30 AM
Joined: Jan 2003
Posts: 3,349
Shelby Twp. Mi
HardcoreB Offline
master
HardcoreB  Offline
master

Joined: Jan 2003
Posts: 3,349
Shelby Twp. Mi
Originally Posted by Gtxxjon
Now you have lol!

I have a 1972 hemi block where the lifter bore has 'let go'!
...

John

Respectfully, I stand by my opinion that; done correctly, something else in the block will let-go long before the valley.

Re: Bushing the lifter bores [Re: HardcoreB] #3004531
01/12/22 01:22 PM
01/12/22 01:22 PM
Joined: Dec 2005
Posts: 8,682
Fulton County, PA
C
CMcAllister Offline
Mr. Helpful
CMcAllister  Offline
Mr. Helpful
C

Joined: Dec 2005
Posts: 8,682
Fulton County, PA
I've never seen a lifter bore blown out because of being bushed. If anything, I would think the bushing would reduce the likelihood of that. A flaw in the casting, crack, etc. might cause that.

The benefits far outweigh any possible downsides. And it is far better than using the tube in galley modification.


If the results don't match the theory, change the theory.
Re: Bushing the lifter bores [Re: CMcAllister] #3004542
01/12/22 01:40 PM
01/12/22 01:40 PM
Joined: Aug 2003
Posts: 39,264
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 39,264
Bend,OR USA
The only way i can think of that would break the block around the lifters is a rod or crank breaking shruggy work
I've seen that puke


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Bushing the lifter bores [Re: Cab_Burge] #3004800
01/13/22 07:39 AM
01/13/22 07:39 AM
Joined: Nov 2020
Posts: 348
Isle of Sheeps
Gtxxjon Offline
enthusiast
Gtxxjon  Offline
enthusiast

Joined: Nov 2020
Posts: 348
Isle of Sheeps
My mistake guys!

It’s the non bushed side that has “let go” maybe something got in there, when the rod broke doh

The 1972 426 hemi block is going into my Sox and Martin Duster clone.

It’s basically will be a ‘full size’ model kit clone lol...

HNY from Limey John


Last edited by Gtxxjon; 01/13/22 07:40 AM.

Carpe diem, quam minimum credula postero, thanx Horace!

There’s no point trying to fix stuff that ain’t broke,,, 'but if ain’t broke',,, you is not trying hard enough...
Re: Bushing the lifter bores [Re: CMcAllister] #3004815
01/13/22 09:54 AM
01/13/22 09:54 AM
Joined: May 2019
Posts: 433
Lake Villa Il
INTMD8 Offline
mopar
INTMD8  Offline
mopar

Joined: May 2019
Posts: 433
Lake Villa Il
Originally Posted by CMcAllister
If anything, I would think the bushing would reduce the likelihood of that.


I agree. Lateral loads at the top of the lifter bore could be transferred through the base into the stronger section of the block, rather than just chunking the top of the bore off.


69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 595rwhp 475rwtq.
Re: Bushing the lifter bores [Re: INTMD8] #3004953
01/13/22 03:43 PM
01/13/22 03:43 PM
Joined: Dec 2006
Posts: 4,524
aotearoa
rebel Offline
master
rebel  Offline
master

Joined: Dec 2006
Posts: 4,524
aotearoa
I used the Wendorf Machine DIY bushing kit on my street strip motor near on 7 years ago. Best trick to a stock block I've ever done. Even now I still have 65 psi cold & 40 psi stinking hot, thats pretty good after 7 years of abuse.

Re: Bushing the lifter bores [Re: rebel] #3005166
01/14/22 09:17 AM
01/14/22 09:17 AM
Joined: Nov 2020
Posts: 348
Isle of Sheeps
Gtxxjon Offline
enthusiast
Gtxxjon  Offline
enthusiast

Joined: Nov 2020
Posts: 348
Isle of Sheeps
Wow Rebel, that is awesome!

Wydendorfmachine company has cracked it with that reamer kit... wrench

I thought about this since seeing an industrial version at Tom Nelson race engines.
He was doing race hemi blocks for 2000hp twin turbo injected cars.

Think one was put into the silver Charger, “Maximus”...

Last edited by Gtxxjon; 01/14/22 09:21 AM.

Carpe diem, quam minimum credula postero, thanx Horace!

There’s no point trying to fix stuff that ain’t broke,,, 'but if ain’t broke',,, you is not trying hard enough...






Powered by UBB.threads™ PHP Forum Software 7.7.1