hi flow oil pump?

[Engel]

Is there a large difference between a hi flow oil pump and a regular oil pump?


Im going to replace mine and am wondering if the hi flow oil pump would need any modifications to work and if there is a point.



thanks!

 

[parchisi]

I've been told that a stock specification oil pump is all that you need unless you are running a race engine that has very loose tolerances. Also, just reuse your old oil pump driveshaft. If your pump ever happens to seize, it's better for the shaft to give than a hardened shaft screwing up your distributor/camshaft.

 

[SQUEEZE&STROKE]

I've been told that a stock specification oil pump is all that you need unless you are running a race engine that has very loose tolerances. Also, just reuse your old oil pump driveshaft. If your pump ever happens to seize, it's better for the shaft to give than a hardened shaft screwing up your distributor/camshaft.

I rspectfully disagree!


RUN THE HARDENED shaft. The stock one is too weak if you turn any high RPM.

As for the hi-vol or reg-vol oil pump...I Agree


Run the standard volume, the high volume can create (and I know people may think this is crazy or disagree with me) too much oil pressure and sucks up horsepower. It can also put added wear on the dizzy and dizzy gear.

For oil pressure-I met an engine builder that has been building engines since the 60's. He puts restrictors on all the mains and lifter lines becasue they only need so much oil. It's crazy how it works but his 390 something cubic inch motor he made just over 750HP...so he knows what he is talking about.

 

[BlackVert]

my builder told me that high volume pumps are really only necessary on blower motors that need oil plumbed to the blowers. also, they can run dry if you use a standard volume oil pan.

my 410 has a standard volume pump (for a 351) with a hardened shaft.

and definately replace the shaft. they are not expensive, so why take a chance on something like that?

 

[final5-0]

I agree about loose motors needing more oil
and
OEM motors certainly would not be in that category

I can see both sides of the shaft issue

Here is something I've always thought about
and
It stems from this fact ...............

If one lost pressure
and
even if they had a good gauge

Its very possible the damage could be done
BEFORE
One saw the prob on the gauge

A pressure sensitive kill switch could give one .......
More of a ... Measure of Safety

Grady

 

[Engel]

thanks for the info!

 

[BlownFiveLiter]

I've always heard running a high volume pump on a stock oil pan will cause oil starvation problems because you're sucking oil from the pan faster than it can drain back. If you're picking up like a 7 quart pan, you could safely run one, but not without it.

 

[final5-0]

On more than one occasion, I've heard peeps say too much oil
pressure on a tight motor can wash the bearings

Just passing on what I've heard

I have however built and owned a lot of motors for street
and strip use with OEM parts.

I did not use any kind of high pressure or high volume pump
in any of them.

They all lived a good life, served me well, and none of them failed
due to oil issues

Grady