Oil Pressure Drop!

[hot37shot]

I have a problem with my 383 chevy which was built by speed o motive about 10k miles ago. I have good pressure at idle and at normal cruising rpm's. However, when I get on it(from a dead stop) or hold the rpm's 3500-4000 i notice a fluctuation in pressure. It would go from 60 to 20 and back up if I let up on the throttle. Whats going on? This has been going on for some time now, the thing runs damm good though!

specs:

383, dart aluminum heads, hydraulic cam, melling oil pump, deep oil pan, mechanical press gage, roller rockers, naturally asperated in a 1969 C10.

 

Thanks

Shawn

[98trck]

it could be the oil pressuse sending unit going bad or the gage

i know its going bad on my truck the gage jumps eraticly

i wrote this then i read mechanical press gage

PETE

[Mojavered]

I would start with the gauges. How big oil pan?

[ChevyTech77]

I hate to say this but, the engine oil is filled to the correct level right?

 

Otherwise, excessive crankshaft end play or too much connecting rod side clearance, is my guess.

[hot37shot]

The oil level should be correct. Its a 7 qt pan. I put 7 qts plus 1/2 to account for the filter. I also have new mechanical gages. Could this problem be related to my fram filter? I just found out not many people like those filters on this site. I use PH13. Could it be wrong clearance between the pickup and the pan? At any rate, the thing runs sweet. I might just let it ride, lol.

Thanks alot for the help

Shawn