3,75 running great
AO Car Of The Year Winner 2015
Join Date: Dec 2003
I put here pretty good info on variable intake as I studied it quite deeply when I installed in on TS.
If you dont find info you need there, ask.
Manifold can be operated 2-3 times even when the engine is off. It runs on vacuum. Like brakes. whenn you turn the engine off, you can brake 2-3 times and then pedal gets hard as the vacuum is used and servo doesnt work. The same with manifold. The solenoid is operated by 12V, when there is no voltage is in short position and when you apply 12V on its pins it switches to long position. you can operate it with a cable attaced to the battery 2-3 times with engine off. Than you need to restart the engine to built vaccum so that it works again.
normal operation of manifold is
0-2800 rpm short
2800 - 5200 long
5200 - limiter short
147GTA,Grigio Metallico,Imola leather,3.75l conversion,ported heads,F575 TB,Carbon plenum,Stainless manifolds,EQ pipes,Supersprint silenced cat back,18" GT multispokes,KW V3,Galfer 6pot 355mm,Brembo sport rear
147 1.6TS, Nerro,Beige Interior,Galfer Extreme Brake kit,2,0TS intake manifold,Custom ex. manifold,200CPI cat,Supersprint silenced center + OO backbox,GTA spoiler,GTA side skirts,GTA headlights,Blaupunkt LA MP74 + Focal + MacAudio + Dynamat + HERZ subwoofer