I'm currently building a B18C1 motor on a budget. I plan to use this motor for daily/weekend track day. Block specs are as listed:

81.5 Nippon PR-3 pistons (CAST)
ACL Race bearings
Stock Rods/Crank
Un-porter GSR head

My builder contacted me saying that I'm missing 2 oil squiters, and I'm debating whether to plug them or just buy the other 2.

Pro's: Increased oil pressure, less weight squirted onto the rotating assembly
Con's: Possibly pinging from the pistons getting to hot, but I'm thinking my Spoon low temp thermo + GSR head will help combat the possible knock issue.

So YES , I have done my research and I know it's been beat to holy hell and back, but I'm looking for some feedback on this.
Side note: LSV/B20V don't have them and people still run cast pistons. Thanks H-T

 

i would say run them, just for extra protection

 

I would still run them... They cant be that expensive even from the dealer.

 

They are a nice piece of mind. I have forged pistons and a LS crank in my gsr. One day im in northern Wisconsin for business and there is no 93 octane to be found. Motor did detonate a lot but today the motor has over 15-20k miles on it and its still running strong. I personally believe I owe the life of my motor to the oil squirters that so many people abandon when going 89mm crank.
I dont mean to scare you into keeping them. But its possible that conditions change weather it be quality of gas, or a really hot day at the track or a funky tune. I for one and happy I kept them.

 

get new ones from factory. the oil pressure gain from blocking them is only a few pounds which i don't think is enough of a gain to compensate for the damage to the motor for the lack of oil to the rotating assembly. just my opinion though.

 

Not meaning to thread jack but what did you do to keep the oil squirters in place when running the ls crank? I wanted to run a ls crank and rod setup with cast pr3 pistons in my b18c5 and pretty much was told its not possible as the crank and or piston skirts will hit them. I was told bending them woulnt be a smart idea either and my best bet was to just plug them.

 

I used CP pistons which dont come down and hit the squirters. And I bent them away from the crank. Been working perfect for over a year now.

 

The gain in oil pressure isn't great enough to justify the lack of the squirters.

Nope.com, Sure the motor will run cooler over all, but the area where the oil squirters will still possibly get hotter without the jets.

Now you know why your LS/V didn't last long?


In all honesty just keep the damn things, they're cheap and they're some peace of mind. I've heard the same nonsense from some idiots on Zilvia.com. As long as they clear the pistion, which your builder should check for, you're good to go. I wish my damn SR came with them but Noooooo Nissan decided to put them only in the turbo SR's! lol

 

The gain in oil pressure doesn't mean squat. Now the gain in oil volume from deleting the squirters that is why I delete them. More oil volume to the bearings is what creates the increase in pressure. Unless you plan on roadcoursing the motor leave the squirters out. Tuning and a good fuel system is what will keep detonation down to a minimum. You can get the rod big ends and bearings drilled to sling oil on the bottom of the pistons like an LS,B16,B20... but this is not 100% necessary when deleting the oil squirters.

 

For a cast pistons I would run them for a forged piston you don't need them