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Old 02-19-2011, 04:01 AM   #1
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Default BP In NR Engines

A quick one, are the BP .21 rods compatible in Nova engines?

Thank you
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Old 02-19-2011, 04:48 AM   #2
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Interesting question. In the BP engine topic someone did messure up the sleeve and that is in width a direct fit (19.5mm)
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Old 02-19-2011, 06:53 AM   #3
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I had the rod in my habd yesterday and they possibly are compatible. I will check to make sure form my friend.
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Old 02-19-2011, 09:43 AM   #4
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Yeah man let us now. You can't beat a nova rod but a cheaper and nearly as good replacement would be nice for club motors.
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Old 02-19-2011, 10:30 AM   #5
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Ok found out. Guy locally has Nova's and the BP engines. Sub assemblies work but you will have to ream a small bit on the big end bearing for it to run....worth a bash, probably a bit on the tight side.

Should be getting a 735 in the next week, cant wait.
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Old 02-19-2011, 12:56 PM   #6
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Someone here measured the rod in the BP and the Nova engines and told me one was slightly shorter than the other. I should double check.
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Old 02-19-2011, 01:02 PM   #7
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Quote:
Originally Posted by garen View Post
Someone here measured the rod in the BP and the Nova engines and told me one was slightly shorter than the other. I should double check.
Well, if the center to center is the same but the BP has a slightly smaller crank pin hole and you measure it from the end of one whole to the end of the other (ID to ID) it would read slightly shorter. Ream it out and it would be the same.

Not saying that is the case, just speculating.
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Old 02-19-2011, 02:36 PM   #8
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Quote:
Originally Posted by wingracer View Post
Well, if the center to center is the same but the BP has a slightly smaller crank pin hole and you measure it from the end of one whole to the end of the other (ID to ID) it would read slightly shorter. Ream it out and it would be the same.

Not saying that is the case, just speculating.
That wouldnt change the center of the end you reamed, the center would stay where it is, you're just making the hole bigger.

In order to measure the distance from center to center, you need to meausure to the outside of the ID of each journal, using the ID side of the caliper, then meausure the ID of each end, divide the ID of each journal by 2, and subtract from the first measurement. That will give you the center to center measurement.

Hope it makes sence.
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