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Original Message
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| RE: C3AE-C rods and forged pistons? Pitfalls? |
| By John - 04/19/2005 4:30:42 PM; IP 142.177.104.81 |
| I think these are the same psitons I used. The TRW spec sheet I had listed 0.002" clearance, but there was a note on the spec sheet that said to add another 0.001" if it was for HP use. That still seems tight, but keep in mind, the piston skirts will be deformed in a bit after the first start-up, so additional clearance will occur. As for balancing, looks like you got away OK. Basically, for the relatively cheap expense of balancing, I always have it done when mixing and matching parts. They usually get all the pistons to the same weight by machining off the underside of the wrist pin support and on the rods by machining the protrusions at each end of the rod. The weights are then used to calculate dummy weights for the crank, and the crank is then fitted with these weights and balanced in a way similiar to balancing a tire. The result in my crankshaft, was only about a 3/8 deep hole about the diameter of a quarter in the outside edge of one of the crank counterweights. Not very much difference in the long run. So it makes sense that your similiar set-up would produce no "noticeable" vibration. |
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