explorateur57

Hi

I just installed a package from Vengeance Racing with VRX4 cam, trickflow tfs215 heads, timing chain, high volume oil pump from Melling, I believe #10296

We had 3 same packages before on C5 and the oil pressure was 49PSI at Idle
On this one, at Idle I am at 55 PSI and 70 PSI @ 3500 rpm - we didn't go further as the assembly is new

Perhaps on the other vettes, it was the older 10295 pump ?

I think this pressure is excessive ?
What do you think ?
Any risk ?

Thanks for your help !

Last C5

I don't think it's excessive at all. Looks pretty normal to me. The newer LS7 runs up to 100 lbs so even if you hit 80 or 85 when you're higher on the rev scale you should be fine. My LS2 stroker will hit 80+ at 3,500 before it warms up.

Cheesecake 07

I run the Melling 10296 on my HCI set up. 40psi at idle w/ 10w-30 @ 225*....70psi+ at 6800rpm. Perfect IMO.

I agree w/ above...IMO I'd prefer to keep oil pressure and volume up with the extra spring pressure and aggressive cam lobes.

10295 is high pressure
10296 is high pressure/high volume

ZZ06

I thought you had to be careful with that high volume pump

Cheesecake 07

Meh...feel like theres some interweb hysteria associated w/ that. Cant speak for the road course with high RPM, long sweepers but I've done hundreds of 1/2 mile pulls and its been flawless.

pewter99

mine is maxed out at start up until up to temp and runs like the others stated....

kinda like my LS7......after a low oil pressure failure in 2 motors I will take good oil pressure any day

ZZ06

My new motor has an SDPC blue printed oil pump and cold start is damn near 70psi. Even at 220+*, idle is still a healthy 45+.

Bluefire

A Melling pump was installed in my H/C build. The pressure numbers you see are almost identical to mine. Operating temp/idle = 54 psi, WOT = 75 - 80 psi.

explorateur57

Why ? Any risk ?

We found 82psi @6500rpm...

explorateur57

https://m.youtube.com/watch?v=TCTrsQaiD-0

My use is for autobahn runs in Germany "pedal to the metal"...

No issues at high speed/rpm for a long time ?

ZZ06

Wasn't a pressure issue. There was speculation from a few people that a high volume pump could potentially suck the pan dry if your oil return was poor from the heads.

Last C5

Stock or high volume, LS engines over oil their top ends and should be equipped with restricted flow push rods and drilled lifter trays.