Adam1203

iTrader: (5)

I talk to a shop once and wider bearing clearances and HV pumps brought up. The shop only recommended running something like that with engines that see prolonged hard rpm usages. Such as but not limited to boat engines. Ill be honest it was 10 years ago and forgot the reasoning. I never did do business with them but I remember it being brought up.

Purple Poncho

iTrader: (1)

My experience: 12 years of a Canton pan and Melling HV pump and no problems, knock on wood. Hot idle around 35-40 psi, 6100rpm 65 or 70 psi. CrUising around 55-60 or so. I've had the valve covers off with the car running and sure some oil splashed out but not more then expected. Ido have an oil fed supercharger in the system that might affect my results.
This is for a weekend toy that sees the 1/4 mile once in a while.

Ed Wright

iTrader: (1)

Any bodies oil pressure that changes 30+ psi between idle & WOT with a high volume pump is leaking oil internally somewhere. Rod, main or cam bearings, or lifter bores. No way around that one.
I quit drag racing due to travel. & time away from our shop during the eighties. I could race at the local dirt track. (Ten minute drive) for as much as I was traveling to drag race. Anyway, I found no advantage to a HV pump in those either. Just more wear. We ran 35 & 50 lap races on the local 5/8th mile track. Dry sumps weren't legal for a few years. I had no bearing problems with the standard pump. That large clearance/thicker oil film/HV pump thinking around knowelagble builders went away well over ten years ago.

Shownomercy

iTrader: (1)

Ed, before you said 7-10psi per 1000rpm is the standard, so with a redline of 6500 rpm, you have a 50psi change... Assuming 10psi at idle and 65psi at redline. Which seems counter of what you said above.

bowtienut

iTrader: (1)

A HV pump in an otherwise healthy engine will hold such a high idle pressure and will open the bypass long before reaching max rpm, so no, you won't see that 50 psi change.

MoparChevZ28

http://m.summitracing.com/parts/mor-22101
Would this be alright for a pump?

And which pan would you guys recommend?

http://www.summitracing.com/parts/mo...make/chevrolet

Or this

http://www.summitracing.com/parts/mo...make/chevrolet

Ed Wright

iTrader: (1)

I said GENERAL MOTORS says the oil pressure they reccomends is 10 psi per 1000 RPM. Not me. That is their recommended minimum. They aren't saying oil pressure should go up & down like a tach.

Ed Wright

iTrader: (1)

That's the pump I like, if you don't race or turn a lot of RPM that pan is OK.

DUDCOUPE

Stock pan, melling select oil pump (not hv), larger filter to hold an extra quart here

great421

iTrader: (1)

OP -

Melling produces two different sets of pump gears; one set is about an inch (for the "standard" pumps), and a second set of taller/deeper gears that measure about 1.3 inches (for the "High Volume" pumps).

I've physically had two different Melling pumps in my hands, and the High Volume's oil pump body and oil pump gears are indeed different / longer than the standard pump.

The installed pressure relief spring determines the pressure (and Melling offers different springs for different oil pressures), however, the pumps with longer gears move a greater volume of oil per revolution of the pump, hence the "HV" callout.

I hope this helps clarify some of the issues being discussed here.

MoparChevZ28

It will see the track maybe a dozen times a year. Which pan would you recommend? Thanks!

Ed Wright

iTrader: (1)

If your not spinning it over 7K it that Moroso
pan will be great. And, unlike one of those Canton's
if you drop it on your foot it won't break anything. :-)

MoparChevZ28

Haha alright thanks again for the advice. Which pan would be better suited out of the two that I put up the links for?

Ed Wright

iTrader: (1)

The #20185, it is 7.5" deep. Other one is too deep. You would be banging it of the ground. When landing from standing it up on the bumper, you don't want to crush the pan. LOL Really, 7.5" is all you need or want. Make sure you order the correct part number pick up for the pump too.

MoparChevZ28

Hopefully it will hang them a little Lol. Called moroso and all the parts are on their way

ahritchie

iTrader: (1)

I tend to agree....the guy who built my shortblock put that big 7qt Moroso pan on mine (car is lowered 1.25 in) and it's LOW (like 4" ground clearance)....I've got to be very careful hitting big speed bumps at an angle, I've already scraped it a couple times and have developed a very small oil pan gasket leak as a result If or when I decide to fix it, I just might go back to a 5.5 qt pan....mine also has a HV oil pump speced by the builder, so I'd probably need to swap it for a regular oil pump if I put a 5.5 qt pan on it...how hard/easy is it to swap out the oil pump if the pan is coming off anyway?

MoparChevZ28

This should be all together in a few weeks
Just need yo get the stuff for the 24x conversion. And the peripherals. I would like to have the engine broke in on a test stand. Is this possible with a fuel injected engine/ what is needed? Thanks

flyinZ

iTrader: (15)

Any update on this setup?

96capricemgr

iTrader: (1)

What do you expect to break in? Cam and lifters need no break in unless you went flat tappet which leaves rings and bores but those are better broken in under load which is impossible on a test stand.

Running it on a test stand would be a great way to glaze the bores before ever breaking it in.

95TAVERT

Looking for pump with bolt on pickup tube to prevent pickup from falling out or spot weld breaking?