Adjustable Cam Gears - Rb25det

[jeffworld2]

hey, was wondering what is involved in installing HKS inlet and exhaust cam gears on the rb25, do you need to change anything with vct or just pull stock off and fit new ones? i would like to know if they can be run with vct. thanks in advance

[tridentt150v]

You can't really run an adjustable with vvt on the inlet on a 25det. You can run with one on the exhaust. You take the ignition pickup and front cover off, slide the belt off, take off the old pulley, put the new pulley on, index the cams to the motor, reinstall the belt, put the cover back on, and then time the ignition. There is no use doing any of this until you have other mods [fmic, ex, pod, pfc etc] and then it is best done when your at a dyno so that you can set the live centre of the exhaust pulley up for best results and map your pfc to the amount of retard you have dialed in.

[jeffworld2]

i know the how, i have the mods, i just want to know if you have to machine the head or you can just put the pulley on, set for 2 deg advance and thats it till tunetime.I read something about blocking the oil feeds to vct or something?

the cam gears are easily available ut i want to know if you can use it. i know most people do just the exhaust but it would be better for me if i could build my head with both cam gears. Ive tried searching all day but its hard to find stuff when cam is a 3 letter word, like vct. so i just asked.

[jeffworld2]

ok, ive had a look at some diagrams of the head and have decided to give it a go with the inlet,

Edited September 19, 2006 by jeffworld2