Al Gietzen wrote:

>
> From what little data I was able to find for the water pump on the
> 20B, it will pump about 35 gpm at engine RPM of 6000.  Marginal, at
> best, for that climbout on a 90 degree day.  At altitude, at cruise;
> the EWP may be able to handle it.
>

Gentlemen: as a data point I have in front of me the factory service
manual for the 1985 RX-7. The Technical Data section lists the water
pump capacity as 150-160 liters per minute/39.6-42.3 U.S. gpm/33.0-35.2
Imp. gpm at 6500 rpm of engine. They list a 1:1.18 eshaft/pump pulley
ratio. Given that these numbers are for both the NA 12A and 13B models
I'd definitely check to see if maybe that 20B might require a tad more
flow especially running at 6K rpm at a relatively high power setting.

    -Mike Robert