Inliners International Forums General Discussion Hi Performance Long rod for the 292 Chevy (New)

Rod length also affects piston to valve clearance, ignition timing requirements and intake charge velocity. With the poor intake design of the stock 230-250-292 head, a short rod would help keep the velocity up, whereas a longer rod would slow it down. I would imagine a lump conversion would be a good companion to longer rods to compensate for the velocity drop.