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Author Topic:   oil pressure
posted April 21, 2004 08:32 PM
i run a chevy 406 with stock oil pump and high pressure spring. i have oil restrictors in and due have s****er and baffles in oil pan. same set up i had last year on my 355. only difference is this year i have small torque converter for 350 tranny. when entering corners i my oil pressure is dropping really low and causing light to come on. under 20 pounds. i never had this problem last year and dont really know how to fix it. i'm scared of idea of adding little more oil since it might get into crank....wondering if with small converter on tranny if my r's are dropping so low i'm losing oil pressure. please help.

posted April 21, 2004 08:42 PM
adding oil wont help. What are the bearing clearances like in this engine. Sounds like they might be on the loose side or at least looser than you previous engine. That would make your oil pressure drop.

posted April 22, 2004 06:32 AM
is this the same oil pump you ran last year? if so, could be the gears inside wearing down, decreasing your oil pressure. how is your pressure overall, has it droped some since last year?

posted April 22, 2004 09:41 AM
Are you running a stock pan or a higher capacity? Check the pickup to pan clearance, replace the pump with a high volume / stock pressure (you don't need the high pressure in a race engine) - the added volume is used to keep the pressure up when running a loose race clearanced engine. Pumps are cheap - only like $20 or so for the basic M55HV pump...

Also make sure that the pickup is secure on the oil pump and doesn't have leaks.

posted April 22, 2004 11:22 AM
this happened to me this year and the light came on 2 times for about 1/2 second at a time..only going into the corners very hard and braking. may just be low oil level or not enough pan baffeling



posted April 22, 2004 07:08 PM
I'd say pick up fell out and is in the pan.

posted April 22, 2004 07:27 PM
I don't think the pickup fell off because it was welded b4 put on. Bearing clearance was .002-.003. When the car gets a little r's back up the pressure goes back up. When idling at about 1500 rpm the pressure is about 40-45 psi when hot. Thanks--

Ego Racing
posted April 22, 2004 08:39 PM
Going into the corners is at the after the straight. If it is a stock style pan there may not be enough oil back down to the pan at that time and the G's sideways don't help the drain back either. The High Pressure pump may be emptying the pan.

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