oil pump

[mclendon]

which would be better melling m55hv or melling 10552 hv using champ oil pan not sure if pickup tube is for a std volume or high volume its a 5/8 tube.

[usafracer]

What is the motor going in? If it is a stock block turning under 6500 I use the hv55.

[stockcar5]

run the 10552 pump. the m55hv pumps have a thinner casting and are much weaker.

[mclendon]

turning about 6500..... thanks for info.

[dynoman14]

My concern would be pumping the pan dry in the cornrers, the bigger pump has a higher flow rate even though it is a better pump. You should get decent performance out of the M55, an HV if you have a good size pan and the 10552 if you have a nice pan with plenty of volume and good flow back in the block.

Also you need to make sure you have a couple small tabs on the sides of the pick-up to prevent the pan from smashing against it if the car bottoms out ( I have used chassis tabs plenty of times ). You want to keep the pick-up face 1/4" to 1/2 inch from the bottom of the pan ( my opinion ).

I would also use the stiffest spring available ( usually pink ) if you are running hydraulics, they love pressure.

[mclendon]

its a speedway champ pan would a m55 be enough or do i need an hv pump rpm around 6300 to 6500 also block has lifter valley vents installed. thanks