Quote:
Originally Posted by Richard L
This is a shame.
Doesn't the the R33/34 ECU control the boost via a solenoid valve?
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This is what ive found on my skyline forum regarding the r33 factory boost solenoid;
"The standard R33 RB25DET boost solenoid (value controller) is 5psi until rpm is greater than 4500rpm and then its 7-8psi. Continue reading if you wish to always be in high mode (7-8psi). If you have an aftermarket boost controller then you can stop reading now.
The standard solenoid has two wires running two it, one is constant power which is shared with the AAC value and some other components (see wiring diagram) the other is a ground signal. The ground signal (black wire) is run to the ECU. This wire is grounded when rpm is greater than 4500rpm by the factory ECU. Basically if you give the wire a constant ground instead of the ECU's above 4500rpm ground it will always be open, thus allowing it to be in high mode aka 7-8psi."
Without confirming with an r33 owner, im assuming the ecu pin will ground the signal to allow 7-8psi. As the majority of r33's tune to 12psi+, they all use an aftermarket boost controller to get this amount.
Hope that helps. These skylines arent as fancy as evos
