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hydraulic cam break in mule block #2925575
05/22/21 04:49 PM
05/22/21 04:49 PM
Joined: Mar 2010
Posts: 1,060
Atlanta, GA
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mgoblue9798 Offline OP
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mgoblue9798  Offline OP
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Joined: Mar 2010
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Atlanta, GA
Anyone attempted using a mule block set up for cam break in?

Is anyone offering this type of service?

Thinking of setting up an electric motor with a rheostat to spin the cam, plum the block with external electric pump to oil the cam journals, spray bar for the lobes, and run lines to the rocker arm shafts.

Interested in you guys thoughts on this.

Re: hydraulic cam break in mule block [Re: mgoblue9798] #2925582
05/22/21 05:04 PM
05/22/21 05:04 PM
Joined: Nov 2007
Posts: 21,808
Kirkland, Washington
Pacnorthcuda Offline
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Pacnorthcuda  Offline
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Kirkland, Washington
Every block is different, so the position of each lifter to its lobe will be slightly different when the assembly is transferred to the engine.

Re: hydraulic cam break in mule block [Re: Pacnorthcuda] #2925600
05/22/21 05:42 PM
05/22/21 05:42 PM
Joined: Jan 2003
Posts: 14,478
So. Burlington, Vt.
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fast68plymouth Offline
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So. Burlington, Vt.
When you’re really really really worried about the cam going flat........ you pony up for the roller.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: hydraulic cam break in mule block [Re: Pacnorthcuda] #2925601
05/22/21 05:49 PM
05/22/21 05:49 PM
Joined: Aug 2009
Posts: 2,036
Mooresburg, Tn
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'72CudaRacer Offline
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Mooresburg, Tn
I've lost two engines that the cam and lifters survived in (solid lifter). I used the cam and lifters in the replacement engines and lost both cams in short order. My conclusion is that lifters don't like being swapped into different engines after being broken in.

Brian

Re: hydraulic cam break in mule block [Re: fast68plymouth] #2925602
05/22/21 05:50 PM
05/22/21 05:50 PM
Joined: Nov 2007
Posts: 21,808
Kirkland, Washington
Pacnorthcuda Offline
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Pacnorthcuda  Offline
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Posts: 21,808
Kirkland, Washington
Originally Posted by fast68plymouth
When you’re really really really worried about the cam going flat........ you pony up for the roller.


...and pray it doesn’t come apart! LOL

Re: hydraulic cam break in mule block [Re: Pacnorthcuda] #2925612
05/22/21 06:34 PM
05/22/21 06:34 PM
Joined: Mar 2010
Posts: 1,060
Atlanta, GA
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mgoblue9798 Offline OP
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mgoblue9798  Offline OP
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Joined: Mar 2010
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Atlanta, GA
Thanks to everyone for the input. If I go any further with this sounds like I need to find a way to use the same block the cam will run in to do it.

Re: hydraulic cam break in mule block [Re: mgoblue9798] #2926578
05/25/21 05:26 PM
05/25/21 05:26 PM
Joined: Jan 2003
Posts: 1,756
London, England
Gavin Offline
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Gavin  Offline
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Posts: 1,756
London, England
These Ford guys don't seem to think block to block variation is an issue....
Cam Research


Re: hydraulic cam break in mule block [Re: Pacnorthcuda] #2926594
05/25/21 06:07 PM
05/25/21 06:07 PM
Joined: Feb 2005
Posts: 20,116
PA.
pittsburghracer Offline
"Little"John
pittsburghracer  Offline
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Posts: 20,116
PA.
Originally Posted by Pacnorthcuda
Every block is different, so the position of each lifter to its lobe will be slightly different when the assembly is transferred to the engine.





Bingo. Jim Dowel (Racer Brown) and I had this very discussion and he recommended to not use a broken in cam in another block. It I was in a spot and had to try a cam I successfully ran before in a different block. I did it’s job and gave me time but it did wipe out the cam and lifters. He went on to say factory specs are the issue


1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: hydraulic cam break in mule block [Re: Gavin] #2926624
05/25/21 08:03 PM
05/25/21 08:03 PM
Joined: Dec 2004
Posts: 10,549
Rittman Ohio
fourgearsavoy Offline
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fourgearsavoy  Offline
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Joined: Dec 2004
Posts: 10,549
Rittman Ohio
Originally Posted by Gavin
These Ford guys don't seem to think block to block variation is an issue....
Cam Research







I know a racer that runs an FE 427 in stock classes and he has used this service with success (didn't eat the cam in short order) shruggy Maybe Ford blocks are different and the lifter bores are machined more accurately but they have been doing this service for quite a while now.

Gus beer


64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60
Re: hydraulic cam break in mule block [Re: fourgearsavoy] #2926654
05/25/21 09:13 PM
05/25/21 09:13 PM
Joined: Feb 2005
Posts: 20,116
PA.
pittsburghracer Offline
"Little"John
pittsburghracer  Offline
"Little"John

Joined: Feb 2005
Posts: 20,116
PA.
Originally Posted by fourgearsavoy
Originally Posted by Gavin
These Ford guys don't seem to think block to block variation is an issue....
Cam Research







I know a racer that runs an FE 427 in stock classes and he has used this service with success (didn't eat the cam in short order) shruggy Maybe Ford blocks are different and the lifter bores are machined more accurately but they have been doing this service for quite a while now.

Gus beer




You are always going to get a split percentage both ways. Heck I changed 4 lifters in a 360 I built for my van in an ocean city parking garage with zero issues. I always kept a spare box of solid lifters in my race car trailer for 3 day race weekends.


1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time










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