Quote:
Originally Posted by tccrab
The vacuum pump only assists the secondary system when the engine is at high rpms for an extended time.
TomC
"Crabs"
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I am late getting this on but I was told by Graham B many years ago that the Yanks made them put in the vacuum pump for the very specific reason mentioned by Crabs. I did not have a vacuum pump on #364 and it ran just fine even at high rpms for an extended time. That said, I know that most Z owners will want the pump anyway. Just thought I would mention this in case you did not want to spend the money.
Curtis