Mishimoto bolt on Oil Cooler kit for G35 Coupe
Joined: Jan 2009
Posts: 7,287
Likes: 189
From: Eastern NC
Nice looking kit and thanks for posting. I'm not being negative with the kit, it looks to be a well made part but I question the 2-3 psi pressure drop and mounting the cooler with the fittings on the bottom. The restrictions of the banjo bolt fittings and the oil cooler itself will reduce the oil flow rate (gallons per minute). The banjo bolts look to have two small holes for the oil to pass thru them. Looks very restrictive to me. Low flow rate = low heat rejection.The oil needs to flow thru the cooler at a flow rate that will promote the oil to turbulate.
Also mounting the inlet & outlets on the bottom will trap air in the upper tubes of the oil cooler, meaning not all the tubes will have oil flowing in them. Think of it like this. What would happen if we had the inlet and outlets on the bottom of our radiators, with no fitting or radiator cap to bleed the air out of? The radiator would not fill up with coolant because the trapped air would prevent it, same thing here.
Their is a question in here I promise. Can you delete the banjo bolts and can the cooler be mounted differently or will a bracket need to be fabricated?
10 years in professional racing (NASCAR) and 3 championship wins I did learn (the hard way most of the time lol ) a little.
Thanks.
Also mounting the inlet & outlets on the bottom will trap air in the upper tubes of the oil cooler, meaning not all the tubes will have oil flowing in them. Think of it like this. What would happen if we had the inlet and outlets on the bottom of our radiators, with no fitting or radiator cap to bleed the air out of? The radiator would not fill up with coolant because the trapped air would prevent it, same thing here.
Their is a question in here I promise. Can you delete the banjo bolts and can the cooler be mounted differently or will a bracket need to be fabricated?
10 years in professional racing (NASCAR) and 3 championship wins I did learn (the hard way most of the time lol ) a little.
Thanks.
Vendor - Former Vendor
Joined: Jun 2010
Posts: 80
Likes: 4
From: Wilmington, DE
Nice looking kit and thanks for posting. I'm not being negative with the kit, it looks to be a well made part but I question the 2-3 psi pressure drop and mounting the cooler with the fittings on the bottom. The restrictions of the banjo bolt fittings and the oil cooler itself will reduce the oil flow rate (gallons per minute). The banjo bolts look to have two small holes for the oil to pass thru them. Looks very restrictive to me. Low flow rate = low heat rejection.The oil needs to flow thru the cooler at a flow rate that will promote the oil to turbulate.
Also mounting the inlet & outlets on the bottom will trap air in the upper tubes of the oil cooler, meaning not all the tubes will have oil flowing in them. Think of it like this. What would happen if we had the inlet and outlets on the bottom of our radiators, with no fitting or radiator cap to bleed the air out of? The radiator would not fill up with coolant because the trapped air would prevent it, same thing here.
Their is a question in here I promise. Can you delete the banjo bolts and can the cooler be mounted differently or will a bracket need to be fabricated?
10 years in professional racing (NASCAR) and 3 championship wins I did learn (the hard way most of the time lol ) a little.
Thanks.
Also mounting the inlet & outlets on the bottom will trap air in the upper tubes of the oil cooler, meaning not all the tubes will have oil flowing in them. Think of it like this. What would happen if we had the inlet and outlets on the bottom of our radiators, with no fitting or radiator cap to bleed the air out of? The radiator would not fill up with coolant because the trapped air would prevent it, same thing here.
Their is a question in here I promise. Can you delete the banjo bolts and can the cooler be mounted differently or will a bracket need to be fabricated?
10 years in professional racing (NASCAR) and 3 championship wins I did learn (the hard way most of the time lol ) a little.
Thanks.
Figured I would chime in to answer some of the questions/concerns regarding our oil cooler kit. We appreciate the feedback and welcome any questions. After speaking with our engineers here are the answers regarding these particular concerns.
Banjo bolts are used in lots of applications including street cars, race cars, and airplanes in many areas. You probably have them on your car’s brake and fuel systems right now. We didn’t reinvent the wheel on this one, our banjo bolts actually have four holes with a cross-section area of 200mm^2. The cross section of the inside of the 10AN line is 113mm^2, so we are not reducing any internal area. Adding the cooler and the fittings and the lines will reduce your flow rate. This is always going to happen when you add in an oil cooler kit. This is like making the comparison that adding wider tires creates more friction with the road, and more friction with the road means you will slow down.
We have tested our oil coolers mounted both upside down and right side up. They consistently have the same pressure drop and temperature drop. You have the ability to mount our coolers however you prefer. For the 350Z kit specifically, you can flip the cooler right side up and still mount it to our bracket. You may have to run the lines a little different than we did in the video, but it should perform the same. Let us know if you have any other questions!
Thanks
Last edited by Mishimoto; Jan 3, 2013 at 10:49 AM.
