NONE?? I don't read that anywhere.
http://data.melling.com/Tech%20pdfs/HIGHVOLUMEPUMPS.pdf
It doesn't say that its a bad idea or a good idea. IMO i would say READ the article they wrote and make your own decision.
I always have used HV (normal pressure ) oil pumps in the 2.0 and always had pristine bearings at the rebuilds of 100000 miles. (The last rebuild was a bent crank that wiped out the center main bearing).
That said, I have a HV normal pressure in the 5.0 currently in the car. Ill always swear by them.
This is always a hotly debated topic here every time it comes up. Ford Muscle had an issue with the 400HP 302 that they built. They used a standard pressure/volume during the build because of all the Hype against the HV pumps. They ended up with a HV anyways because the oil press was down from where it should be on a new build. It was where they wanted it later after the switch.
http://www.fordmuscle.com/archives/2...dex.shtml#mill
Good enough proof for me on which ive always believed in.
However I'm sure theres plenty of people that hate HV oil pumps for their own reasons. You might hear from them as well.
IMO its insurance in a stock engine.
Good luck and happy new year!
