Dyno Pull yesterday (OBX Headers)

[Shrek]

Originally Posted by Marc Haibeck

Road racers should be aware that water pump cavitation occurs at 6100 rpm. Engine speed over 6100 rpm for more than a few seconds can overheat the engine.

Reducing the pump speed can raise the cavitation speed. A ZR-1 Products under drive water pump pulley will raise the cavitation speed to 6400 rpm. If an under drive water pump pulley is used with an ATI under drive crankshaft pulley the cavitation speed will increase to 7500 rpm. Use of the two pulleys may cause the engine to run hotter at idle with the AC on.

Thanks Marc! Shouldn't be a problem getting her to short shift for her first couple of track days. She's pretty good at using a shift light vs. having to read the tach. I'll start working on getting a set of pullies installed real soon.