| Kyle73 |
Mon Nov 17, 2008 6:51 pm |
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| i just bought this 64 baja and it had mud in the cyl. so i pulled the head and it was coverd in mud, i wiped all the mud off and the piston had 86.96. as the size. but i dont know what crank it has. so what do i have? or what could i have. it looks like the pistons are new. |
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| iowa vw |
Mon Nov 17, 2008 7:10 pm |
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| 86.96 is the pistons size, you have 87mm cylinders. If it has a stock crank you have a 1641. since you have the head off you can check the stroke by measuring how far the piston goes up and down. Get that and you can figure out |
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| Kyle73 |
Mon Nov 17, 2008 7:14 pm |
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| yeah thats what i was thinkin it was 87mm. how would i measure the stroke. |
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| fastinradford |
Mon Nov 17, 2008 8:51 pm |
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| distance from top dead center in piston #1 to the bottom of the srtoke |
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| Kyle73 |
Tue Nov 18, 2008 12:02 am |
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| how wuold i know what it is. like a tape measure or something. |
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| towd |
Tue Nov 18, 2008 12:14 am |
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| Don't worry it's stock,, but the quickest way is to check for 8 dowels |
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| Euro 67 |
Tue Nov 18, 2008 6:16 am |
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| I've seen and have 4 8 dowel stock cranks. he needs to measure stroke. |
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| doc1976 |
Tue Nov 18, 2008 6:38 am |
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| find yourself a metric stainless steel pocket ruler. this will get you close. |
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| drscope |
Tue Nov 18, 2008 8:32 am |
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It won't matter which cylinder you measure, they are all the same!
Get your self a digital caliper like this;
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=47257
Then turn the engine until one cylinder is at top dead center. Put the back side of the caliper on the top of the cylinder. Open it until the rod sticking out the end touches the piston top. Zero the caliper, then turn the engine until the piston reaches bottom dead center.
Extend the caliper until the rod touches the piston top. Read the caliper. This is your stroke. |
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| towd |
Tue Nov 18, 2008 10:03 am |
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| yes stock cranks can be 8 doweled,, Have you even seen a stroked crank with only 4 dowels ??? |
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| DrDarby |
Tue Nov 18, 2008 9:01 pm |
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| Sure have. My '71 Ghia had one when I bought it...with the flywheel kind of torn off the end of the crank. |
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| fastinradford |
Tue Nov 18, 2008 9:55 pm |
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drscope wrote: It won't matter which cylinder you measure, they are all the same!
Get your self a digital caliper like this;
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=47257
Then turn the engine until one cylinder is at top dead center. Put the back side of the caliper on the top of the cylinder. Open it until the rod sticking out the end touches the piston top. Zero the caliper, then turn the engine until the piston reaches bottom dead center.
Extend the caliper until the rod touches the piston top. Read the caliper. This is your stroke.
Yeah, I know it doesnt matter which cylinder you measure, but there is a mark for TDC on #1. |
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| Rome |
Wed Nov 19, 2008 5:07 pm |
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Common stroke lengths are:
64mm (stock 40hp 1200cc engine)
69mm (stock 50, 53 & 60hp from 1300 thru all 1600's)
74mm, 76mm and 78mm aftermarket strokers |
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