hemi oil pump

[steve maluk]

hello gang
need some help
machine shop is saying i need to look into a hemi oil pump verse a big block mopar pump. he is saying due to heads being so big a hemi pump is required any advise is grateful
street machine
hemi mega block 4.5 bore
thanks

 

[Cranky]

hello gang
need some help
machine shop is saying i need to look into a hemi oil pump verse a big block mopar pump. he is saying due to heads being so big a hemi pump is required any advise is grateful
street machine
hemi mega block 4.5 bore
thanks

High volume pump is what he's talking about? You should have a 'hemi' oil pan for that too.

 

[Orig69]

A 426 Hemi comes with a high pressure oil pump.

 

[RoasterStrudel]

I would think your machine shop would do the choosing on something like this? Your oil pressure may vary depending on what the bearing clearances are and oil weight to be used. Will you be using internal or external oiling?

For OEM quality pumps, Melling sells their model M-63HV for high volume, and M-63HP for high pressure. -Also, as Cranky had mentioned, a higher volume pump may require a higher oil capacity pan.

There's lots of other fancy parts available...But we'll keep it simple first.

 

[steve maluk]

ok / new build from scratch / need to purchase all new so is there a special oil pump for a hemi or is a big block pump high pressure ok like would a 440 pump bolt up?
what is the difference between a high pressure and a high volume thanks to all

 

[pnora]

hello gang
need some help
machine shop is saying i need to look into a hemi oil pump verse a big block mopar pump. he is saying due to heads being so big a hemi pump is required any advise is grateful
street machine
hemi mega block 4.5 bore
thanks

Shop does not know what he is talking about. No matter b-rb-hemi they all use the same pump. There is no hemi specific pump that I am aware of.

 

[R413]

And of you put on a high volume pump the engine mount bracket hits the pump and won’t sit flat against the block. I doubt Chrysler corp made all their 426 cars that way.

 

[Fran Blacker]

Get a harden tip oil pump drive with appropriate gear for your cam.

 

[Dragon Slayer]

The only difference for OEM hemi pump (440 HP i believe also) was the relief spring had a higher rating so that relief valve opened later.

 

[lewtot184]

the "hemi" pump just had a higher relief spring (black 65psi for street hemi, '64-'65 race hemi had a plain 75psi spring). rotors are the same for all factory installed big block pumps.

 

[BSB67]

You need a new machine shop

 

[not so famous bob]

You need a new machine shop

^^^^^^this^^^^^^^
You will need a higher capacity pan , the gen 2 hemis have excellant drain holes in the corners of the heads and block , for the oil to get back to the pan , the wedge engines dont have them...

 

[steve maluk]

does an aftermarket hemi 4.5 bore need a vintage tray.

 

[not so famous bob]

I`d think it would need a stroker tray .

does an aftermarket hemi 4.5 bore need a vintage tray.need

 

[not so famous bob]

what the hell is a stroker tray

I assume hes talking about a windage tray . A stock windage tray wont work for a big stroker , what the hell dont you understand about that ?

 

[pnora]

what the hell is a stroker tray

You must not know anything about a stroker motors internals. So time to read. Longer stroke means the rods and crank journals are further out past the pan rail and the same goes on the other side they are further in the motor. With that said a stock windage tray will get the crap beat out of it. A redesigned tray has clearance made into it for the crank and rods.

 

[68 HEMI GTS]

First question is what are you planning to do with it? Cruise it around, street strip, run the piss out of it?

 

[BSB67]

Might as well pile-on

What’s a vintage tray? Old?

 

[blue69runner]

Check with summit racing for the pump. Different oil pan different pic up tube.

 

[33 IMP]

A vintage tray is a windage tray that auto-correct corrected.



But you knew that.