View Full Version : Losing oil pressure after run


STOCK1090
05-28-2007, 01:13 PM
At the end of a run, when I let off, I lose oil pressure breifly and it then comes back. I have tried the stock LS pan, and two different pans with all kinds of baffles and trap doors. Pickup height is correct. Adding oil does not seem to help. I have run as little as 4qts and as much as 6 qts. It has great oil pressure thoughtout the run and any other time. Has anyone run into this before? Has anyone restricted the pickup tube to control the oil flow?
Thanks!
Rich

Phil99vette
05-28-2007, 08:28 PM
An accusump would work, have you tried restricted pushrods?

STOCK1090
05-28-2007, 08:50 PM
Accusumps not allowed in our class. Yes on the top end oil restriction.

Thanks!

Rich

1320FEVER
05-28-2007, 08:52 PM
Do you think you might be "burping" some oil through the PCV because of pressure buildup in the crankcase after each run? Just a thought that comes to mind..

STOCK1090
05-28-2007, 09:00 PM
I don't think that can cause a pressure problem but you are making me think about some of the top end venting.

Thanks!

Rich

Ed Wright
06-01-2007, 07:01 PM
A lot of super stock sbcs see the same thing. One friend tells me with the water-weight synthetic oil that is not so pronounced with his car. Faster drain-back maybe? I'm suprised more oil doesn't help.

tuff
06-02-2007, 04:06 PM
Ive had alot of oil pressure problems with the stock pans.This year i went to a moroso and all my probems went away.The moroso has a rear sump that is included with the pan and it also holds 8qts not 6qts like they advertise.

STOCK1090
06-02-2007, 04:33 PM
Thanks guys. I have been away from my computer for a couple of days.
Our LT1 Stockers and Super Stockers do not have this issue at all.

I do not believe the Moroso pan is appoved for NHRA Stock. I would hate to run that much oil.


Rich

Inspector12
06-13-2007, 01:46 AM
I had a simular issue that went away after going to a thinner oil. I know it isn't anything you haven't thought of, but I just thought I'd mention it again. Also I know Harland was having som problems with oil moving up the back of the block on one of there cars that was launching with a Trans Brake so you might just contact him also. Y2Khawk is his name on here if you don't know him. Good luck.

STOCK1090
06-13-2007, 10:48 PM
Thank you!