Thread: Oil Squirters...Absolutely necessary? I don't think so...

I wonder if the squirters allow for a lighter piston with a thinner crown?

Yes, but thats only for temperature relativity.

Please explain "temperature relativity".

there is only one real downside to running oil squirters: oil temps. Without a cooler, oil temps can get really high. Other than that, there is no other real deterrent. It helps with detonation significantly.

18psi on a t25 damn how do you do that?...

Thanks for a good post. It makes me laugh how some people read posts about motors that hold up for awhile one way and think that it is the way to go. Oil squiters are a plus no negatives. The diesel engine is a great example. They go 300,000 miles under heavy boost loads and there is a lot of data backing that. Think about it like this... You have fire on top of the piston and nothing cooling it on the bottom of a DE motor. On a DET there is a squirter on the bottom side cooling to down. Oil squiters is a definate plus. Just like putting stronger rods in... It is just some more insurance.

Think about this for a sec

Oil Squirters do cool down the pistons, but then it raises the temperature of the oil causing the oil to lose its properties. All it does is transfer the heat from the pistons to the oil. Therefore causing you to have other issues.

When Nissan design the motor, it was for a top mount intercooler set-up which gets heat soaked running at just 7-8psi of boost with a t25 that blows hotter air then like a gt28rs. It was Nissan’s way of protecting the pistons. Running a front mount changes that.

I've know quite a few people who run boosted de's with no issue's an have lower oil temps.

Sure thats true, but wear and tear will be higher. What are the other issues?

I would rather have a higher oil temp by 5 degress than have less lubrication and higher piston temp. The effects of a cooler piston far outweight the effects of slightly higher temp.

Nissan run TM due to space. They later ran sidemounts and frontmounts. Your theory is a bit off wack

No one's mentioned yet that most if not all Nissan DET and VE pistons have a cooling channel in the crown. The oil squirter actually forces oil into the hole on one side where it travels through the cooling channel removing heat and coming out the other side.

A cooler piston crown usually gives a better detonation threshold.

Tomei give a good explanation with their forged cooling channel pistons theory on this webpage, 1/2 way down.
PISTON

Interesting! I didn't know about the cooling channel. I'm going to look at some DET pistons today and see what you're talking about.