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stugray |
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#1
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None ![]() |
I am looking for a good 2.0L stock crank (71mm).
It is for my race engine, so I would rather have forged than billet (like the SCAT product). Who has used a AA forged crank? Any issues? Do we know if these are brand new or reconditioned to be "new"? Anything to worry about or better options? https://aapistons.com/products/counterweigh...qxoCrTYQAvD_BwE |
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zig-n-zag |
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#2
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Member ![]() ![]() Group: Members Posts: 182 Joined: 18-May 06 From: Hawaii Member No.: 6,024 ![]() |
A 66mm crank can be made into a 71mm crank by offset grinding the rod journals.
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stugray |
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#3
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None ![]() |
A 66mm crank can be made into a 71mm crank by offset grinding the rod journals. I was wondering if I could have a 1.8L crank ground down to a 2.0L crank. If the people doing the work can add a little weld to the outside of the journals you should be able to. I have TWO 1.8L cranks (paperweights) on my shelf. |
Mueller |
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#4
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914 Freak! ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None ![]() ![]() |
A 66mm crank can be made into a 71mm crank by offset grinding the rod journals. I was wondering if I could have a 1.8L crank ground down to a 2.0L crank. If the people doing the work can add a little weld to the outside of the journals you should be able to. I have TWO 1.8L cranks (paperweights) on my shelf. No need to add material. The new journal has a smaller diameter and will have an axis further away from the crank centerline for the longer stroke. |
Mark Henry |
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#5
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that's what I do! ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada ![]() |
A 66mm crank can be made into a 71mm crank by offset grinding the rod journals. I was wondering if I could have a 1.8L crank ground down to a 2.0L crank. If the people doing the work can add a little weld to the outside of the journals you should be able to. I have TWO 1.8L cranks (paperweights) on my shelf. No need to add material. The new journal has a smaller diameter and will have an axis further away from the crank centerline for the longer stroke. I personally wouldn't do this, to do it right it would need to be rough cut, stress relieved, green ground, heat treated and final ground to size. I may have missed some steps, one may be re-drilling oil holes for the rods. If you add the work costs up it's way cheaper to find the correct core in the first place. |
wndsrfr |
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#6
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Senior Member ![]() ![]() ![]() Group: Members Posts: 1,430 Joined: 30-April 09 From: Rescue, Virginia Member No.: 10,318 Region Association: MidAtlantic Region ![]() ![]() |
Gotta add my experience with 80mm cranks on my 2316 before I went with the FAT new forging one. Two failures....probably attributable to poor quality control in buildup welding and also the stress cracks from oil holes ending up too close to the web.
here's the links: http://www.914world.com/bbs2/index.php?sho...=162641&hl= http://www.914world.com/bbs2/index.php?sho...=197901&hl= |
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