melling high volume oil pump?

[johnny5_72]

Is anybody running one of these in a 2.3? Just wondered if they were good or if there were any drawbacks. 25% more oil volume sounds peachy to me. Let me know.

John

 

[scotts90ranger]

my engine has good pressure at all times with the stock pump, I'm not sure it needs more than that... on a hot idle I get 25psi, 3000rpm I get around 50psi, and this is on a 165K engine, a chevy 350 that's nice and broken in is lucky to get 5psi at a warm idle.

 

[Joe400]

i'm not running one in a 2.3, but i did put one in my 6.6L smallblock when i rebuilt it last summer. I get about 60 - 70 psi on a cold start, and it never drops below 45.

 

[Zer0PSI]

I would use the stock pump unless you have the mods to warrant a high volume pump.

 

[Mutant Pony]

The only time you need a high volume is if you are running really loose clearances for Racing.

 

[psmith]

can anyone confirm why the high volume pumps state that they are not to be used with cast aluminum oil pans?

i'm assuming this is due to clearance issues, but has anyone actually tried to see how far off they are?

(getting ready to order the parts i need to finish my bottom end, sorry to bump an old thread.)

thanks

 

[mikepotts]

bear in mind... hi volume is not hi pressure! it will move more oil, that is it. thus aftermarket pans are recommended, since they will suck stock pans dry (alum. included) before the oil has a chance to make it back to the pan. benefits..... i cant see any, unless the motor has serious mods, like MP mentioned.

 

[ejholmgren]

Nearly everyone on turboford recommended using the stock pump

 

[Jason]

bear in mind... hi volume is not hi pressure! it will move more oil, that is it. thus aftermarket pans are recommended, since they will suck stock pans dry (alum. included) before the oil has a chance to make it back to the pan. benefits..... i cant see any, unless the motor has serious mods, like MP mentioned.

Volume increases often net pressure increases.

Example, Say you push 2 gallons of liquid through a 3/8 hose in 30 seconds and measure the pressure. Now say you push 3 gallons through in the same time. What do you think the pressure will do?

 

[psmith]

Nearly everyone on turboford recommended using the stock pump

stock (ranger) pump? if i'm looking through the melling catalog correctly, the "high volume" pump they have listed IS the stock replacement pump for turbo stangs/tbirds.

 

[mikepotts]

Volume increases often net pressure increases.

Example, Say you push 2 gallons of liquid through a 3/8 hose in 30 seconds and measure the pressure. Now say you push 3 gallons through in the same time. What do you think the pressure will do?

true, however melling also produces hi pressure pumps for some motors. example, ford 5.0's have available stock, hi volume, and hi pressure. i know that is a 5.0, the point i am getting at is the hi volume pumps will boost volume a little, but not enough to keep melling from making a specific hi pressure pump. ive used hi volume pumps in the rebuild of many 5.0's and never noted a significant pressure increase, one rebuild (with a solid cam) we installed a hi pressure pump, and noted a 20 lb increase.

i am building a 2.3 for my 88 ranger right now and had to make this choice two days ago, i was in autozone lookng at a stock and a hi volume pump sitting on the counter trying to decide if a hi volume would be necessary, i called my machinist (builds 2.3 for dirt track racing) and he said unless i was racing the truck, the stock pump would be fine since i was not getting an aftermarket pan (larger capacity). plus the hi vol was $65.00 and stock $25.00.

i got a stock pump.

 

[mikepotts]

Volume increases often net pressure increases.

Example, Say you push 2 gallons of liquid through a 3/8 hose in 30 seconds and measure the pressure. Now say you push 3 gallons through in the same time. What do you think the pressure will do?

oh and 2 gal to 3 gal is a 33% increase... i dont see the hi vol boosing that much, not spliting hairs.

 

[Jason]

oh and 2 gal to 3 gal is a 33% increase... i dont see the hi vol boosing that much, not spliting hairs.

I know but I didn't feel like saying 2.5 gallons.

 

[mustang9093]

Parasitic HP loss...

While dyno testing the 289 in my Super Stocker we found a 11 hp gain with the stock pump over the hv model. It still has 35psi @8000 rpm. As an end result I went to the scrap barrel and found a stock 302 aluminum pump, washed it out and installed it in my $17,000.00 289!!! (its lighter and makes more power!!!!).

 

[turbo cat]

if you dont need a hiogher volume pump dont bother. All you will do is have more pressure which equalls to higher oil temps and higher pressure can wear out seals faster