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Old 02-04-2014 | 03:52 PM
  #3361  
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The crank pin on a RB and Nova Rossi are different sizes.
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Old 02-04-2014 | 04:00 PM
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Originally Posted by Chris Reilly
The crank pin on a RB and Nova Rossi are different sizes.
Originally Posted by wingracer
Check the size of your crank pin. If it's 5mm, any Nova R rod will work. Older RBs used a smaller pin, like 4.9 I think. Those will need an old RB rod. Roleof knows the exact dimensions, I could be wrong.
5mm RB, 5mm Nova, am I missing something here?
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Old 02-04-2014 | 04:17 PM
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Nova .195", RB .198". Yes you're missing something.
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Old 02-04-2014 | 04:36 PM
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Originally Posted by hambone
Nova .195", RB .198". Yes you're missing something.
This has always been the case, actually .196 on the Nova. On some newer Rb engines they may have the .196 size. When I used to rebuild alot of Rb's and the crank was worn, a used nova rod would fit great saving some $.

Rex
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Old 02-04-2014 | 04:53 PM
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Originally Posted by 22Racer
This has always been the case, actually .196 on the Nova. On some newer Rb engines they may have the .196 size. When I used to rebuild alot of Rb's and the crank was worn, a used nova rod would fit great saving some $.

Rex
That's correct Rex, my mistake. OS is .195"
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Old 02-04-2014 | 07:01 PM
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Why on earth would you people be using imperial measurements when measuring products designed and manufactured in countries which use metric? Makes no sense whatsoever.
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Old 02-04-2014 | 07:37 PM
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Originally Posted by Eivind E
Why on earth would you people be using imperial measurements when measuring products designed and manufactured in countries which use metric? Makes no sense whatsoever.
A measurement is a measurement. Fact is you stated crankpins are same size but they aren't. However, my RB Blast V12 has a full circle single slugged crank that has the nova sized(.196") crankpin. Seems like the blast is being built using parts bin specials.
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Old 02-04-2014 | 07:49 PM
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Originally Posted by hambone
you stated crankpins are same size but they aren't. However, my RB Blast V12 has a full circle single slugged crank that has the nova sized(.196") crankpin.
So first you say I'm wrong.
Then you say I'm right.

Are you a bit confused?
Remember the user asked about a Blast V15.
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Old 02-04-2014 | 08:01 PM
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Originally Posted by Eivind E
So first you say I'm wrong.
Then you say I'm right.

Are you a bit confused?
Remember the user asked about a Blast V15.
Just saying traditionally RB has .198" and nova has .196". The blast is a crapshoot. I wouldn't be surprised if the same version differs.
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Old 02-04-2014 | 08:07 PM
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Originally Posted by hambone
I wouldn't be surprised if the same version differs.
The only difference between your V12 and the V15 is the V15 has two slugs on the crank, conrod part number is the same and everything. So basicly, as far as I can tell, he should be able to use the cheap Go or Alpha con rods.
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Old 02-04-2014 | 08:13 PM
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Originally Posted by Eivind E
The only difference between your V12 and the V15 is the V15 has two slugs on the crank, conrod part number is the same and everything. So basicly, as far as I can tell, he should be able to use the cheap Go or Alpha con rods.
Well I would measure for sure. The exploded view of engine parts that came with my engine doesn't match squat that's in my engine. It's a joke. If V15 really is the same then the nova rod works. Why anybody would put a pos alpha rod in a nova based engine is beyond me.
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Old 02-04-2014 | 09:26 PM
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Originally Posted by A7racer
I have a Blast V15 and the rod has some slop in it already. RB replacement rods are too expensive and would like to know which of the Nova rods will fit this? I know I read somewhere to measure the crank pin but I don't have measuring tool and Im hoping someone here knows off hand....any other rod other than a Nova that will fit? Alpha, GO etc? I know the quality is lower on the other brands but I cant see spending the coin for an OEM rod for such a budget engine at this point.
How's the performance of it otherwise?

IMO rod-play and the need to change them is way overrated..
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Old 02-04-2014 | 09:43 PM
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Sorry fellas, I didn't mean to start an argument here. I'll just try a friends GO rod and see.
Reason I want to use an Alpha or GO rod is because the cost of an OEM RB rod is 60+ dollars and the engine was only 159.99 so I can't see me spending the coin for an RB rod. If I can get away using a cheaper rod for a few more gallons then I'm a happy camper. I appreciate all the responses and again, sorry to start all of this.
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Old 02-04-2014 | 09:46 PM
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Originally Posted by Herrsavage
How's the performance of it otherwise?

IMO rod-play and the need to change them is way overrated..
Well the rod has a lot of slop at TDC and after seeing a couple of my buddies snap a rod in the last month in their engines....other brands, I don't want to risk losing the whole engine with a damaged sleeve too. Just for peace of mind.
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Old 02-04-2014 | 09:49 PM
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OK, but how does it run? Does it have the oomph for truggy?...
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