We'll it turns out that I think my oil pump is going south or something is wrong with my pickup. Under hard acceleration the pressure is dropping to 25 psi's.

I'm looking for a new oil pump now and I'm having a hard time figuring out what to buy. From what I here melling's are pretty good and so are moroso's. I found a melling unit at autozone for $14 and I was think about that. But how is the pickup tube connected to the old pump because I'm pretty sure that this one doesn't come with one. Do I just pull the tube out of the old pump or is it bolted in? I was also thinking about getting a high pressure pump? What would you guys suggest? perferably something with a pickup tube already connected. Should I get an oil pan gasket too?

 

I would just buy a stock pump and get a high pressure spring to put in it. Its easy to do. I would replace the oil pan gasket to make sure there are no leaks

 

The high volume pump that summit sells is a melling high volume pump with the pickup already tack welded on. It sells for about $50. I bought one, but haven't installed it yet. It also comes with a stock pressure spring just in case you want that.

John

 

I don't know if I want a High volume pump or not because from what I hear your not supposed to use one with a stock pan. Is this true?

 

Some people say that when you run a high volume oil pump if you are corning hard, at high RPM sometimes too much of the oil will be in the top of the motor and not in the pan, causing the pump to suck air in. However, no one has been able to prove this. My plan was to get the high volume pump, and leave an extra half a quart of oil in the pan, just in case.

John

 

Don't you run the risk of blowing gaskets and seals with the extra oil in there. This is what I was always told... I'm just curious.

 

So should I get Stock Melling with a shimmed spring, totally stock Melling, or a High volume?

 

I'm not real sure what the diferences are. I just bought a melling high volume one, from what I see you can always put a stock pressure spring in it later if you choose.

John

 

DO NOT get a high volume pump with the stock pan, I used one that I got from Summit and I did a thread on here asking about using one without an answer. So I used it and put in the low pressure spring (this was after my dad told me not not to becuse he's had problems with them). Well I found at why, one day I was coming down from 110 and hit the brakes kinda' heavy and all of a sudden The check gauges light came on I had no oil pressure. That'll scare the crap outta you trust me. Once every thing got stopped the pressure came back up but that is scary. Get a stock flow pump or get a different pan. That and my oil pressure would bounce around at idle and this was with a little extra oil added and the larger filter that holds almost a whole quart, so that won't work.

 

Never had a problem out of mine. Stock pan and a Melling HV pump with the high pressure spring. I've got over 10, 000 miles on her now and quit a few 105-109 slow downs at the track
Don't buy it if you heavily road race on a track. With extreme g's of cornering at high RPM the pick up can come uncovered. If you road race, you should have a good pan anyways since the stock pump might be uncovered in those conditions.

BTW, my oil pressure never fluctuates with this pump, and i'm using a mechanical oil press guage.

-Shannon

 

The same thing happend to me... I started running six quarts of oil instead of five... Never had the problem again...

 

I think I'm gonna go with the stock melling and pick up from autozone. $19 I really think my problem is with the pick up. If I bang the pan it kinda souns funny. Maybe the pickup is about to fall off.