RCU Forums - Which crank is what?

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Bozarth

06-07-2009 05:25 PM

Which crank is what?

1 Attachment(s)

Can anyone tell me with certainty which crank is what? Both are Nelson cranks for either Q500 or Q40 motors that I have had over the years. Thanks.

Kurt

BarryReade

06-07-2009 05:38 PM

RE: Which crank is what?

I will be surprised if the "B" crank is not the QM40 crank because of the additional maching of the intake port.

daven

06-07-2009 05:57 PM

RE: Which crank is what?

Cranks are the same between Q500 and Q40 motors.

The latest cranks have a larger intake than the older cranks.

Personally, I'm not sure that makes them any faster, but working on testing them now...

Bozarth

06-07-2009 07:03 PM

RE: Which crank is what?

I'm wondering now if A has been "machined" by a previous owner?

Kurt

Bozarth

06-07-2009 07:41 PM

RE: Which crank is what?

I sent these photos to Dave Shadel earlier in the day. To paraphrase Dave's response: "A is junk (a short lived bad idea) and B is fine. Q500 and Q40 cranks are the same."

Kurt

djlyon

06-08-2009 11:16 AM

RE: Which crank is what?

The "A" cranks look like the ones in my old ABCs

Denis

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