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cncwhiz Samba Member
Joined: February 28, 2005 Posts: 226 Location: Gardnerville, NV
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Posted: Tue Dec 16, 2014 6:19 pm Post subject: When to switch to stroker pistons. |
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Do I have to use stroker pistons for a 78mm stroke? |
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GTV Samba Member
Joined: March 27, 2004 Posts: 2084 Location: Si'ahl
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Posted: Tue Dec 16, 2014 6:19 pm Post subject: |
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You don't have to but it will make assembly easier. _________________ EMPI Power Rules! |
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raul arrese Samba Member
Joined: July 23, 2006 Posts: 1329 Location: miami florida
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Posted: Tue Dec 16, 2014 6:59 pm Post subject: Re: When to switch to stroker pistons. |
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cncwhiz wrote: |
Do I have to use stroker pistons for a 78mm stroke? |
I wouldn't build a 78 mm crank without B pistons , use the stroker pistons and keep your motor narrow _________________ " Hot vw feature , may 2014 issue "
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[email protected] Samba Member
Joined: August 03, 2002 Posts: 12785 Location: Salt Lake City, Utah
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Posted: Tue Dec 16, 2014 7:47 pm Post subject: Re: When to switch to stroker pistons. |
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I recommend switching at 76mm.
74mm w/5.4 or 5.325" rods and A pistons
76-78 w/5.5 rods and B pistons
82 w/5.4" rods and B pistons. _________________ It's just advice, do whatever you want with it!
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Multi69s Samba Member
Joined: January 24, 2006 Posts: 5363 Location: Lefty, CA
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modok Samba Member
Joined: October 30, 2009 Posts: 26777 Location: Colorado Springs
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Posted: Thu Dec 18, 2014 5:51 pm Post subject: |
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78 with stock rods you will have to deck the case zero, .020, .040, or .060 depending on which "B" pistons and cylinders you get. |
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Redlines Samba Member
Joined: June 07, 2009 Posts: 168 Location: Fredonia, NY
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Posted: Fri Jan 02, 2015 5:09 pm Post subject: |
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modok wrote: |
78 with stock rods you will have to deck the case zero, .020, .040, or .060 depending on which "B" pistons and cylinders you get. |
What does that mean? Are some "B" pistons and cylinders longer/shorter than others??????? |
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modok Samba Member
Joined: October 30, 2009 Posts: 26777 Location: Colorado Springs
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hsosa1 Samba Member
Joined: January 17, 2005 Posts: 1897 Location: Fontana
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Posted: Thu Jan 15, 2015 10:28 pm Post subject: |
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To piggyback going from a 69 to 78crankshaft we cut the barrels down .60 on the 1914 build. Stock rods. alum case so now I would need 5.5 rods? _________________ Just Cruzin Sur Califas VW Car Club est♤1998 |
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mark tucker Samba Member
Joined: April 08, 2009 Posts: 23937 Location: SHALIMAR ,FLORIDA
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Posted: Fri Jan 16, 2015 12:21 am Post subject: |
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78 + b pistons and 5.5 long rods and about a .020-.040" shim under the barrels. better yet just get a 82 stroke crank.
Last edited by mark tucker on Fri Jan 16, 2015 7:28 am; edited 1 time in total |
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modok Samba Member
Joined: October 30, 2009 Posts: 26777 Location: Colorado Springs
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Posted: Fri Jan 16, 2015 12:51 am Post subject: |
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hsosa1 wrote: |
To piggyback going from a 69 to 78crankshaft we cut the barrels down .60 on the 1914 build. Stock rods. alum case so now I would need 5.5 rods? |
no, 5.4 would be about right. |
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mark tucker Samba Member
Joined: April 08, 2009 Posts: 23937 Location: SHALIMAR ,FLORIDA
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Posted: Fri Jan 16, 2015 7:26 am Post subject: |
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no 5.4 is too short unless you cut the cylinders/ deck the crap out of the case. |
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TinCanFab Samba Member
Joined: April 04, 2006 Posts: 2743 Location: Waterford, California
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