Made some main caps
#2661656
06/02/19 09:24 PM
06/02/19 09:24 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
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OP
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Posts: 2,540
Milwaukee WI
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Im “in process” of building a blown early hemi. I made some main caps for myself after seeing what is available for sale out there. Mine tie into the pan rail meat a whole lot more than any I’ve seen. This will necessitate the need for notches/ bulges in the pan, but that is easy enough to deal with.
"use it 'till it breaks, replace as needed"
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Re: Made some main caps
[Re: TRENDZ]
#2661709
06/03/19 12:38 AM
06/03/19 12:38 AM
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Joined: Aug 2003
Posts: 43,307 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,307
Bend,OR USA
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Is this block a 392 or a 354 block? back in the day I use to fool around with some of the early Chrysler Fire power motors, 1955 331 C.I., 1957 and 1958 392 C.I. motors. Many SO CA N/A racers suggested using the 354 motors instead of the 392 due to early heads where better on the intake angle and lifter angles They would increase the stroke to make them bigger. If yours is a 392 block is it a regular, RR or A-1 casting? The A1 was the preferred 392 block due to having the thicker full main webbing instead of the weaker blocks with the lighting done between the main webbing and cylinder walls
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Made some main caps
[Re: Cab_Burge]
#2661721
06/03/19 04:14 AM
06/03/19 04:14 AM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
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This is a 331 industrial engine. I sort of fell into this by accident. I was given a 241 hemi when a friend died. It was a basket case. Lots of cool old parts. In the time I spent trying to find the parts I needed/ wanted, I realized that some people in the early dodge hemi world are easily threatened when an outsider wants certain parts. Anyway, after searching local craigslist for parts for that engine, I came across this 331. Complete minus intake for $700. I searched the internet for parts for the 331, and quickly learned that the Chrysler hemi is supported by a whole slew of companies. I can get a new roller cam from damn near any cam company. The price and support made it much easier to go this route. Honestly never knew much about these engines, but they are growing on me.
"use it 'till it breaks, replace as needed"
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Re: Made some main caps
[Re: moparx]
#2661807
06/03/19 11:23 AM
06/03/19 11:23 AM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
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Milwaukee WI
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4140 alloy steel. Done on my manual mill in the garage. Im pretty pleased with how it turned out.
"use it 'till it breaks, replace as needed"
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Re: Made some main caps
[Re: moparx]
#2661866
06/03/19 01:42 PM
06/03/19 01:42 PM
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Joined: Jan 2003
Posts: 13,402 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,402
Marion, South Carolina [><]
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VERY nice machine work ! what grade material ? I'd love to be able to just make something like that for myself!
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '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: Made some main caps
[Re: slantzilla]
#2661867
06/03/19 01:44 PM
06/03/19 01:44 PM
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Joined: Jan 2003
Posts: 17,914 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,914
S.E. Michigan
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Very pretty looking work! They appear very robust for sure.
Rich H.
Esse Quam Videri
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Re: Made some main caps
[Re: dodger mope]
#2661883
06/03/19 02:15 PM
06/03/19 02:15 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
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Milwaukee WI
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I didn’t keep track of time, but it was 3 weekends of “hobby time” It took longer than I thought it would. The caps weren’t the hard part. Getting the block ready was tricky, because my mill is worn some. The elevation of the table changes at the ends of the travel distance needed. It was difficult, but all the saddles are the same depth from the pan rail now. That made making the caps much easier. The block started out with one side at .124” and the other at .126” that would have made the cap plane surfaces tipped. Fixturing would have been difficult.
"use it 'till it breaks, replace as needed"
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Re: Made some main caps
[Re: TRENDZ]
#2661920
06/03/19 05:13 PM
06/03/19 05:13 PM
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Joined: Nov 2009
Posts: 3,082 St. Paul , Mn.
tubtar
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Joined: Nov 2009
Posts: 3,082
St. Paul , Mn.
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Done on my manual mill in the garage. This raises the bar a tad. lol The thing I admire most about this is that this is exactly how it was done by the pioneers of the sport. If they wanted something , they made it. And the biggest expense of " unobtanium " parts was the tooling and ability to make it happen. It is far rarer to see this today , as opposed to people opening their check book and having things made for them. And I don't have a problem with either. But the skill and determination that goes into making your own parts sets your build apart from the way it happens for most of us.
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Re: Made some main caps
[Re: tubtar]
#2661992
06/03/19 08:44 PM
06/03/19 08:44 PM
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Joined: Jan 2004
Posts: 13,247 Mt. Vernon, Ohio
dartman366
I Live Here
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I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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Only problem I find with them is,,,they are going to be hidden in a oil pan and no one will get to admire them,,,nice impressive work.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: Made some main caps
[Re: moparx]
#2662280
06/04/19 03:06 PM
06/04/19 03:06 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
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OP
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Milwaukee WI
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No heat treat. Was told 4140 in stress relieved state closely mimics elongation of cast iron. Im no metallurgist but that sounded good to me! Should I be concerned?
"use it 'till it breaks, replace as needed"
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Re: Made some main caps
[Re: TRENDZ]
#2662364
06/04/19 08:26 PM
06/04/19 08:26 PM
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Joined: Jan 2004
Posts: 13,247 Mt. Vernon, Ohio
dartman366
I Live Here
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I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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unless done in a controlled environment 4140 will move around during the treatment process and probably shrink, bend and/or twist a little.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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