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stroked 401 |
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matty 401 
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Joined: Jul/06/2007 Location: Iowa Status: Offline Points: 1727 |
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 Topic: stroked 401Posted: Nov/16/2018 at 7:02am |
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so is the crank off set on the grind or just turned down to a small block chevy size to run the longer rod i have a 401 crank that spun a bearing needs welded to make stock was thinking of the having it turned into a stroker crank
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72 matador 401 the beast
79 concord 2 door 72 matador 304 grasshopper 68 Rogue 406 93 Cherokee 4.0 5 speed |
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304-dude
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Joined: Sep/29/2008 Location: Central Illinoi Status: Online Points: 9082 |
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Posted: Nov/16/2018 at 7:46am |
It is both actually. Offset grind will make the journals smaller. The cost effective and easiest is chevy journal size. Using LS rods and custom pistons. |
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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Airdrie AMX
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Joined: Aug/08/2010 Location: Alberta, Canada Status: Offline Points: 329 |
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Posted: Nov/16/2018 at 8:58am |
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The short answer is yes offset grind to increase stroke, longer rods alone will not change stroke.
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72 amx javelin 401 4spd
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White70JavelinSST
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Joined: Aug/08/2012 Location: Minnesota Status: Offline Points: 4867 |
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Posted: Nov/16/2018 at 9:08am |
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Depending on the change in center location of the newly machined offset journal, one "side" of the journal may get very little to no grinding. in the case of adding stroke it will be the "side" of the journal that is opposite the counterweights on the crank. With any luck there won't be too much damage done to that "side" of the journal. Edited by White70JavelinSST - Nov/16/2018 at 9:19am |
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70 Javelin SST, second owner, purchased 1972
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matty 401
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Joined: Jul/06/2007 Location: Iowa Status: Offline Points: 1727 |
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Posted: Nov/16/2018 at 9:10am |
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it got tore up pretty good all the machine shops close says it needs to be welded up
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72 matador 401 the beast
79 concord 2 door 72 matador 304 grasshopper 68 Rogue 406 93 Cherokee 4.0 5 speed |
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White70JavelinSST
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Joined: Aug/08/2012 Location: Minnesota Status: Offline Points: 4867 |
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Posted: Nov/16/2018 at 9:23am |
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If you are anywhere close to Ocheydan, Iowa, check out Z Machine. Excellent work done by these guys. Welding one rod journal may be more cost effective versus machining all of them and purchasing new rods and pistons . Of course provided you aren't going for all out horsepower no money limit.
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70 Javelin SST, second owner, purchased 1972
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matty 401
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Joined: Jul/06/2007 Location: Iowa Status: Offline Points: 1727 |
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Posted: Nov/16/2018 at 9:39am |
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that is a bit far i am twords the bottom of the state lol but thanks anyway
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72 matador 401 the beast
79 concord 2 door 72 matador 304 grasshopper 68 Rogue 406 93 Cherokee 4.0 5 speed |
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Trader
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Posted: Nov/16/2018 at 9:51am |
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Wouldn't happen to be #6? I just got an engine again that will need the crank turned for #6.
Have never been a fan of the old "cross drilling" a crank but starting to think cross drilling #6 may be a good idea.
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matty 401
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Joined: Jul/06/2007 Location: Iowa Status: Offline Points: 1727 |
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Posted: Nov/16/2018 at 9:55am |
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not sure could be do not remember been a while sense i looked at it
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72 matador 401 the beast
79 concord 2 door 72 matador 304 grasshopper 68 Rogue 406 93 Cherokee 4.0 5 speed |
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Hurst390
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Joined: Apr/20/2008 Location: secret Status: Offline Points: 5811 |
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Posted: Nov/16/2018 at 4:15pm |
Edited by Hurst390 - Nov/16/2018 at 4:24pm |
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SC/Hurst Rambler
11.62 120 100% Street Legal |
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matty 401 wrote: