Planet Minis

aaron33_dg@f

+1 on all of that!!!!

nickypoo

[QUOTE=HRC;1134248]Dude, change your avatar. This isn't a gay men's social networking site and it's creeping all the straight guys out.
QUOTE]

now thats funny

50rider340

after reading everything dood has had to say about them, im not running one on my 88 not that i have some monster sized motor. It was either him or someone else the last time this came up you dont see anyone running one on a 124 dohc do you. I think its been stated also that on a street application that it has some benifits but not like a night and day difference.

HRC

a dohc is a completely different motor. They may naturally run cooler.

The debate will go on but here's some facts.

NOT all oil coolers work.
Billet oil coolers are the worst.
Properly built oil coolers have been PROVEN TO WORK and allow your motor to run cooler.


Want your bike to run cooler? Than buy a properly built oil cooler.
Don't want your bike to run cooler? Don't buy an oil cooler.

dood

It's not that oil coolers don't work. Obviously the extra volume of oil can or will help in the aid of cooling. Also the material in the lines and said cooler will also give the chance for the oil to disapate the heat.
My thing is that the oiling system on a CRF based engine is not sufficient enough to pump and maintain correct oil pressure for that particular engine.

So until someone makes a system that is correct for this engine, my opinion is to not waste your money.

jdmp

save your money.

norway stud

say if you were to have a big bore kit such as the tb 165 v2 kit would you need a cooler for the bbk.

dood

Again. It has nothing to do with the size of your engine. Has everything to do with efficiency of the oil cooling system.

I've built tons of 194 engines with out the need of a cooler.

I'm not trying to start any arguements. I'm just posting what I've found through countless hours of testing and racing.

If the client requests that he needs an oil cooler, I will give my opinion on my findings and if that person still wants it. On it goes but not with out alot of modifications to the system.

norway stud

say ifi had a tb 165 v bbkon my bike should i get one

dood

I wouldn't.

norway stud

ya but if you have a bigger engine wouldnt it be running hotter and having an cooler kit will help it tho so nothing will happen to your engine

norway stud

dood why wouldnt you get one

dood

While a bigger engine in theory can create more heat, the cylinder and head are also redesigned to handle this heat.

If you read my previous post about why I'm not a big fan of them, you'll understand.
It's not that oil coolers don't work. It's that they don't work on CRF/KLX based engines the way they are suppose too.

Z50King

what are the problems with the current system? how does one modify the system?

dood

I posted this on another thread.

The current oiling system on a CRF OR KLX based engine is not set up for the use of an oil cooler.
When adding a cooler, you are adding more volume of oil to your pressurized system. When you add volume, you lose pressure. To keep the pressure up, you will need to restrict the oiling system to maintain constant oil pressure through out the entire engine.

Go find yourself a manual for a big bike engine, whether it be a YZ450F or a GSXR1000.
Look at the oiling system routing. You will find that there are oil restrictors through out the entire engine.

The problem with aftermarket oil coolers is that they do not provide this restrictor.
While being that a CRF/KLX is a splashed based system and the only reason you need pressure is for the top end. Unless you are running roller rockers and have roller bearings on your cam, not having sufficient pressure will damage those parts.

Z50King

What about not changing the size of the passage to the clutch cover and adding a high volume oil pump? will that not pump enough oil to the head? i seem to get plenty of oil leaking out of my old TB oil cooler fitting, it seems like enough pressure to me.

adding volume to a system like this, as in making the extra oil travel up to the cooler (causing a gain of potential energy) under pressure, is going to add pressure to this system, and i guess you are saying this extra pressure is not attainable by the oil pump. is this what you are saying?

dood

When your current oiling system is designed to just add enough oil to the required parts of your engine and the client goes and adds more lines and a cooler which will add space to this pressurized system, your oil pressure will drop.
Adding a high volume pump does not cure this.

Just because you see oil leaking out of you fittings doesn't mean it's the required amount. There is a huge difference between 10 lbs or pressure and 40.

Z50King

thanks for all the information. i will keep running mine, though

you are right, i was speaking of the incresed pressure at the exit of the oil pump in relation to the oil cooler, and that would force more oil elsewhere instead of up the oil cooler

HRC

I agree with this post. I think people need to be more aware of how oil coolers work and make sure they get one that is properly built.

I don't really know how the TB cooler is built but I think I remember someone saying that it doesn't have a restrictor. If it doesn't.... then I am scratching my head..... because the TB oil cooler has been proven to work and keep temps up to 20 degrees cooler.