Because I do a lot of track days, I put an extra oil cooler with a build in thermostat on my Integra typeR with B18c6.
But now my oil pressure is dropped from 75psi to 60psi. Can this drop of pressure damage my engine?

 

Wow... you have a b18c6...

 

hmm doesnt sound good to me. you can look into getting a better oil pump gear... i know that prodrive makes one

 

use the smaller oil filter from the DC5 for a quick cheap fix.... see if it brings it up any.

Toda also has a oil pump gear.... not sure how the price compares to that of Prodrive....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VolpeOwnsU &raquo;</TD></TR><TR><TD CLASS="quote">Wow... you have a b18c6... </TD></TR></TABLE>

He's from Holland, so yes it indeed is a B18C6.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gaskleppie &raquo;</TD></TR><TR><TD CLASS="quote">Because I do a lot of track days, I put an extra oil cooler with a build in thermostat on my Integra typeR with B18c6.
But now my oil pressure is dropped from 75psi to 60psi. Can this drop of pressure damage my engine?
</TD></TR></TABLE>

Could you give a few pictures of the installation, the running of the lines, what size lines were used, which oil cooler was used, which thermostat...etc.

This post would most likely have a better, more informed response in the Road Racing/Autocross forum. Ask a moderator to move this thread.

Austin

 

The cooler size doesn't matter. Because of the flow resistance the oil pressure drops. The pressure right after the pump will be still 75psi, but after the cooler there is just about 60psi left.

A bigger oil pump will still deliver 75 psi right after the pump, so the pressure drop after the cooler will still be 15psi!
To get the same pressure after the cooler I have to screw up the pressure on the oil pump to 'lets say' 90 psi. only then I will get the old 75 psi after the cooler!

So, will the lower oil pressure harm my engine?

 

15 lbs less pressure should not hurt if all else is right. If you decide to shim the pump spring, use a maximum thickness of .050" stainless shim. Any thicker will load the pump harder. I would replace the pump every 15,000 miles or so to keep everything safe.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gaskleppie &raquo;</TD></TR><TR><TD CLASS="quote">The cooler size doesn't matter. Because of the flow resistance the oil pressure drops. The pressure right after the pump will be still 75psi, but after the cooler there is just about 60psi left.</TD></TR></TABLE>

Depending on the kind of cooler you have, size will effect pressure drop. The cheap oil coolers (finned tubes) will have low pressure drops if the tubing sizes are the same between the lines and the oil cooler but they suck at cooling since they really only cool the oil near the tubing wall. A Setrab for instance performs much better at cooling the oil since the oil travels through a flat finned tube ( much like a radiator) so the cross sectional area is much less and more of the oil is in contact with the tubing. But since the cross sectional is smaller you will need more tubes to keep the flow at a low pressure drop. You could also be loosing some pressure through your thermostat. I prefer to not use the thermostat and just size the oil cooler for that.

The old general rule is 10psi/1k rpm

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kikomon &raquo;</TD></TR><TR><TD CLASS="quote">add more oil?</TD></TR></TABLE>

i concur