Now that summer is on it's way, I am thinking about making additional improvements to my TBird's cooling system. I already have an aluminum radiator and electric fan.  Made a big difference.  There are a number of additional modification available. Casco sells a water pump with deeper fins.  I believe this is to compensate for the TBird spacer.  They also make a smaller water pump pully which is supposed to improve flow at idle.  I have also seen an improved spacer. My issue is only when sitting in traffic on a hot day.   As soon as I move, the temp returns to normal. Any input?

From when I did the innovators west damper install, I found something like 7000 - 8000rpm max for a water pump and 18000 rpm for an alternator.  The water pump RPM limit should be taken with a grain of salt since the only "official" spec I found was in Stewart Components tech section and they make performance pumps which may sustain higher rpm than a stock replacement pump.  The other pump specs were "from the internet" and we all know how reliable that can be.  The alternator rpm came from Powermaster, in regards to a street alternator so that one is probably pretty reliable.

Since this is a cooling thread, the vast majority of street ys with a stock damper will not exceed that pump rpm with any readily available pulley and it should not be a concern.


Lawrenceville, GA