oil pump modification

[stpher]

Hi.

I remember seeing something about modifying oil pumps but cant find anything. Can someone help me with what modifications can be done 2 L and 1800 engines

Thanks, Rick

[MrJD]

Im curious why you want to modify it?

[narfire]

My stock pump makes the 20/50 oil 60+ psi at start and higher rpms and 20-30 psi at idle when warm. Been that way for 8 years.
What is the pump not doing that you want it to do?
Chris

[vandor]

The mod that racers will do is to put a THIN washer under the relief valve spring, thus increasing spring pressure which increase the oil pressure at which the spring opens. Not sure if it's really needed.

[stpher]

I read somewhere about modifying the oil pump drive up near the splines, tapering the the sharp edge just under the splines because it was prone to breakage. Am I off base here? The rest of the pump is OK and according to Guy Croft, I can add a 2mm steel washer under the spring. That's all

Would like to see a picture on the drive done if in fact that is what is done

Thanks, Rick