Ted B

iTrader: (6)

Deleting them would be taking a step in the wrong direction. More HP = more heat. The jet of hot oil 'feels' like ice water to a piston running at WOT. Channeling heat away from the piston improves the detonation threshold under high loads and extended running, improves power potential, and improves both durability and long-term wear characteristics. This is race engine technology that filtered down to OEM applications.

Those squirters weren't so important for a 70hp/L NA 4G64, but definitely are for a 200+hp/L turbo engine. Anyone would be wise to install squirters in an engine with that much or more specific output if that engine wasn't originally equipped, and many do.

mrfred

iTrader: (50)

I kept mine.

wamang

i have the wiseco hd piston for my evo 9 wagon but the piston neck hit the oil jet.. any solution to slove it

bsphillips

iTrader: (4)

As you have read most everyone on here said to bend them and measure for clearance. I decided to delete them. The Wiseco pistons are forged and made to handle high heat, the factory pistons are not, therefore they used oil jets to cool the factory pistons. I found bolts with short threads, copper washers and lock tight and torqued them to the same spec as the oil jets. The motor has been running for a few years now on 25+ psi with no issues. Blocking them also provides more oil to more crucial parts of the motor.

LetsGetThisDone

iTrader: (1)

Bend them to clear. Do not delete them.