Hey my Chevy has Ford Rods !!!!!!

[The Punisher]

Huh??  I always thought that longer rods would allow the piston to dwell 
longer at the end of the stroke (top and bottom) and therefore have a higher 
speed while traveling up and down. How can it dwell longer at the top AND 
move slower too??? did I just mis-understand you or am I missing something 
here ?


>Anyway, I think the point of the long rod comparison is that the piston is
>closer to TDC for longer, and it's moving slower at every point between +/-
>90* from TDC.  This causes less heat build-up in the charge, and because 
>the
>piston is moving slower at the top of the stroke it gives the expanding
>gases more time to fill the slower-expanding combustion chamber.  
>Obviously,
>the slower piston speed means less vacuum therefore less intake charge, but
>by adjusting the valve events to suit (wider lobe separation, for one) this
>can be compensated for.  Also, because the piston is moving slower at the
>top half of the stroke, there is less chance of rod failure due to "toss".
>As you mentioned, the side loading is lower too, so less power is lost due
>to friction and theoretically better piston wear AND better ring wear.
>

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