mrl510

Im trying to decide which to get. Im building a lt1 383 supercharged. And i have a canton pan. Which Oil pump should i buy. Its probably gonna be a melling so if you can suggest one of there oil pumps. Thanks

shoebox

Melling 10554. It should come with their pink spring for higher pressure.

rskrause

No need for an HV pump and there are downsides.

Rich

gillta95

Using a Melling 10554 with stock pressure, in experience high pressure pumps have failures.

shoebox

Nahhhh. What is the reasoning behind your statement.

MachinistOne

Yeah...I'd like to hear this one too

slingshot

Having a high volume pump only is bad with a stock pan as it will suck it dry. I have a mellings 10552 which is 10 % higher volume, and it as been working fine with a canton pan. They did not have a 10554 in stock when I bought it, and I needed it same day. The volume it provides is pretty nice, it will start building pressure in the car as it cranks so oil is going through the motor before it starts.

mrl510

Thats what melling recommended to me was the 10552. So pretty much i need to choose between the 10552 and the 10554

Injuneer

Gee... I didn't know that. I guess I better have them pull the 80psi spring out of the stock/blueprinted pump in my 800HP/800lb-ft 381 LT1..... its only been 10 years since it was built, and I'd hate to have "failures" now.

94SLUG

MAGIC


I have HV for 20k now, and many 120+ pulls no issues... When I asked my machine shop about this suck the pan dry idea they looked at me like I was crazy...

RUDEDOG

Same here. I never had a problem with the HV pump and stock pan. I tried to get it to suck the pan dry on a dyno and could'nt do it.

shoebox

There have been plenty of people post with issues and damage from an HV pump. Glad you guys are not having problems.

All it takes is a momentary loss of pressure at high RPMs to ruin your day.

Bersaglieri

I'll be running a High Pressure pump in my 383, we'll see if it poops the bed

-Dustin-

grumpygreaseape

call me old school, but if i recall correctly, the only gm motor that had an oiling system that could be "sucked dry" by a high volume oil pump was an oldsmobile motor.years ago i built a 403 in a 78 trans am and added rocket heads to it, ran it with a super t-10 i added. at the time when i built it, i called joe mondello (rip) and he said no hv pumps for olds motors. i have had hv pumps in all my sbc chevys-no problems

mrl510

im still undetermined whether to get a high pressure or high volume pump. Is there any positives or negetives on either one?