GM solenoid question

cnj4ever · Oct 6, 2009, 01:32 PM

If you swap the solenoids out STOCK vs GM boost solenoid, do you have to retune for that or is it a straight drop in affair. Thanks for the help sorry if this has already been answered somewhere else.

617G · Oct 6, 2009, 01:33 PM

yes, it has to be retuned! The are no longer any restrictor pills and you will overboost untuned.

goofygrin · Oct 6, 2009, 02:42 PM

more than just the overboost, you only use one table to control the boost and the changes are finer.

tephra · Oct 7, 2009, 12:44 AM

yes retune DEFINITLEY required.. otherwise you WILL blow your engine!

KevinD · Oct 7, 2009, 02:53 PM

RETUNE!!! you have to reduce the duty cycle on the boost control solenoid tables. default it is 100, start at 50 with a 3 port.