question on phenolic spacers

Stop and think about this: You have a cam with overlap. The intake valve opens while the piston is not quite to TDC, helping the exhaust flow out the exhaust. Does any exhaust get in the intake? Probably not.

Do pulses from other cylinders affect flow at times? No one knows. Does slamming the exhaust shut, stopping the exhaust flow affect the incoming charge? Maybe. This changes the flow for a split second, maybe, affecting the signal to the carb. Times 8.

No, this is what I have been told, by an ex-racer and machinist that has shelves lined with NHRA trophies for national record holder.

Nobody knows what convoluted stuff is happening in the intake manifold. So if you use a spacer, you get the carb out of that mess, which keeps it from sensing the rock and roll going on. It feels a constant need for flow.

Any spacer good. 4 hole for bottom and mid; open for top end. He says he learned that just getting the carb up of the intake stabilized the signal.


Hope I explained it right, probably not.