omega0684
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| posted on 5/4/09 at 08:34 AM |
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crank difference?
Whats the difference between the cosworth yb crank and a pinto crank?
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snapper
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| posted on 5/4/09 at 08:40 AM |
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Pinto has 6 bolt fixing for the flywheel
Cosworth has 9 bolts.
Both cranks are bullet proof if prepared properly but the 6 bolt crank needs a locating dowl or two if you intend to race it or go to 7500 to 8000 for
long periods of time.
All the dimensions are the same
[Edited on 5/4/09 by snapper]
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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NS Dev
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| posted on 5/4/09 at 08:41 AM |
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cosworth one is steel and has more flywheel bolts.
If you dowel the flywheel to a pinto one though then I'd like to see one break!
There's nothing much wrong with a std pinto crank other than the flywheel mount.
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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omega0684
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| posted on 5/4/09 at 08:56 AM |
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if i remember rightly i have 2 dowls in my pinto crank and my flywheel is only 3.68 kgs
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NS Dev
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| posted on 5/4/09 at 09:07 AM |
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then you'll be safe to a lot of revs as long as everything else is balanced.
7500 is certainly safe
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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mcerd1
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| posted on 5/4/09 at 12:22 PM |
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and aswell as the above the cossie one has a 8mm longer nose (so more space for pulleys) and 2 short keyways instead of 1 long one
Alex, if your thinking about building a cossie from a pinto - don't do it, its cheaper to buy a whole cossie and rebuild it (4x4 one for
preferance)
I found out the hard way 
[Edited on 5/4/09 by mcerd1]
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