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Original Message
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| I have researched this issue. |
| By James - 06/23/2003 6:12:04 AM; IP 68.32.205.194 |
I have a HP oil pump and wondered the same thing before I installed it as it came with my engine package. I got on the phone with an engineer at Melling and he told me that the HV pumps were good for drag racing and the HP pumps were good for the street because the HV pumps will empty the pan very quickly. On a long trip you could have a problem. The stock pump is not a bad choice for normal street driving with an occassional romp.
I cut some valve cover tops off to watch the oil as the engine ran. I also experimented with different size restrictors and different weights of oil. The optimum set up with a HP pump is .060 size restrictor with 40 weight oil. Any bigger restrictor or thicker oil and the seals are submurged in oil creating a oil drinking problem. Thinner oil seamed to work Ok but as long as I didn't use anything thicker than 40 weight I was Ok. A Holley jet that size works great on a stock Ford head but you will have to get creative if you have an Edelbrock head since the oil hole in question is half the diamiter of the stock ford head. Edelbrock tried to correct this by making that hole half the size but they could have gone half again smaller and still been ok from what I have seen. I hope this is what you were looking for.
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