High oil pressure with Melling pump
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,187
Likes: 266
From: Virginia
High oil pressure with Melling pump
I recently had a cam installed and had a Melling high volume pump put in as well. Obviously until the oil temp gets hot and thins out pressure will be higher but my oil pressure gauge maxes out and on the DIC im showing 80-85psi at like 2k rpm’s just going through the gears being easy on it…When the car finally gets up to 210+ it’s more normal but why would the pressure be so high?? Is that common for a Melling pump or do I have some sort of blockage? LS3 wet sump car
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,187
Likes: 266
From: Virginia
Im hoping the high pressure is common with the Melling pump, but that just seems super high
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,631
Will be fine, and blow off valve in oil pump will keep the pressure from going over pressure.
The only down side, with the blow off valve being forced open now greater than normal at higher rpms, any debries that do find it way in to the blow off piston, could cause the valve to stick open, and loose all oil pressure isntead.
The only down side, with the blow off valve being forced open now greater than normal at higher rpms, any debries that do find it way in to the blow off piston, could cause the valve to stick open, and loose all oil pressure isntead.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,187
Likes: 266
From: Virginia
I’ll take a video later today and post. I just thought it was odd that my oil pressure was on the low side prior to the cam install and new pump and now it’s really high. Once I’m above 200° I think it’s okay but I’ll have to check to see how high it gets in the upper rpm’s. I know when hot I’m about 48psi at idle and about 65psi at 2500rpms
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Race Director
Joined: Sep 1999
Posts: 12,438
Likes: 919
From: CONCORD NC
GM Racing literally recommend we shim our oil pumps 150/1000” 20 years ago, so I always shim or replace. Now we know the oem pumps cavitate above 6k
anyway, which pump did you buy. Melling makes it very difficult to find the right, slightly higher volume and/or pressure pump.
I went with the 295hv, and yes it’s pretty high cold,
anyway, which pump did you buy. Melling makes it very difficult to find the right, slightly higher volume and/or pressure pump.
I went with the 295hv, and yes it’s pretty high cold,
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,187
Likes: 266
From: Virginia
GM Racing literally recommend we shim our oil pumps 150/1000” 20 years ago, so I always shim or replace. Now we know the oem pumps cavitate above 6k
anyway, which pump did you buy. Melling makes it very difficult to find the right, slightly higher volume and/or pressure pump.
I went with the 295hv, and yes it’s pretty high cold,
anyway, which pump did you buy. Melling makes it very difficult to find the right, slightly higher volume and/or pressure pump.
I went with the 295hv, and yes it’s pretty high cold,
Here are a couple videos… Now this isn’t on a hot motor so obviously pressure is going to be higher but this seems a bit high. I got the oil temp up to 220° today and in mid rpm’s the pressure is about 65-75psi but when you stab the throttle it jumps up to 85-90psi but that’s high rpm’s
Melting Slicks
Joined: Feb 2017
Posts: 3,293
Likes: 1,283
From: Phoenix, AZ to Quakertown, PA.
C6 of Year Finalist (appearance mods) 2019
Mine is the 10295 model, as I stated above mine is running similar to yours cold. Not that our cold is really cold in AZ…
After watching your videos, my oil pressure does not do that after warm up. Yes it will increase slightly with higher rpm’s but doesn’t peg the gauge.
After watching your videos, my oil pressure does not do that after warm up. Yes it will increase slightly with higher rpm’s but doesn’t peg the gauge.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,187
Likes: 266
From: Virginia
Mine is the 10295 model, as I stated above mine is running similar to yours cold. Not that our cold is really cold in AZ…
After watching your videos, my oil pressure does not do that after warm up. Yes it will increase slightly with higher rpm’s but doesn’t peg the gauge.
After watching your videos, my oil pressure does not do that after warm up. Yes it will increase slightly with higher rpm’s but doesn’t peg the gauge.
