SR20DET heating when i pass the 7psi

[initial240sx]

hi guys, need help...


SPECS:
-SR20DET Redtop
-Mishimoto Radiator
-OEM FAN, but is direct way..not controlled with fan sensor
-T25
-greddy profec type-s


i sent my 240sx to the mechanic, to install the boost controller, he tells me that, when he pass the 7psi to 9-10psi...in seconds the temperature reach 3/4... but if you keep the 7psi...the temperature stay normal...he check the radiator, thermostat, coolant and its OK. I ask him if the head gasket was ok and it does.

so what i can do?

[KiLLeR2001]

Running lean perhaps?

[steve shadows]

I would check out your coolant temp sensor arrangement first make sure they are in good shape don't have a bunch of corrosion or crap on them and also make sure the grounds are good. Have the guy do a leak down or compression test if it;s free or you should run one just to be sure. Also do you have thermostat in? Make sure you have nismo thermo or at least a stock one.

[initial240sx]

I would check out your coolant temp sensor arrangement first make sure they are in good shape don't have a bunch of corrosion or crap on them and also make sure the grounds are good. Have the guy do a leak down or compression test if it;s free or you should run one just to be sure. Also do you have thermostat in? Make sure you have nismo thermo or at least a stock one.


yes i have the oem thermostat.. but i'm going to buy the nismo thermo, aftermarket headgasket and ARP headstuds... to see what happen...

[initial240sx]

also, a friend told me, that i may have problems with the fuel pump, because in 7psi the engine work properly, but + boost = + fuel, so thats way the engine overheat... is this true?

[josephin510]

Running lean.

[initial240sx]

Running lean.


sorry, in past post i didn't understand the meaning of running lean, but i google it now... thanks