Stumps 312 Posted September 19 Looking for Cam recommendations for the AU VCT XR6 engine that can function with the VCT enabled. Looking for around 180 rwkw's for my XG ute 5 speed, I have the XR6 vct manual ECU and plan on fitting a J3 chip for tuning. What other mods can be done to lift the power up on this interesting engine. Is it worthwhile upgrading to an FG falcon style coil packs in place of the single AU unit? I would appreciate any info on getting power out of the VCT engine. Share this post Link to post Share on other sites
Rod Racer 89 Posted September 20 Cam selection for a VCT engine needs to be carefully considered, due to the amount of camshaft advance and retard happening. Excess of timing duration and/or lift will cause piston to valve interference and a badly damaged valvetrain, cylinder head and pistons. I'd suggest you call Crow Cams, or Wade Camshafts and talk to them about this, rather than relying on info from the interwebs. They might have specific grinds to suit the VCT engine. Otherwise, perhaps converting back to non-VCT might be an option, considering your RWHP expectations. Good luck. Share this post Link to post Share on other sites
Stumps 312 Posted September 23 Seems that the go is to lock the VCT and just run NON VCT cams instead. If that's the case, what was the point of the VCT on the SOHC motors, seems it can only handle small cams, anything that produces power makes the VCT useless... Share this post Link to post Share on other sites
Rod Racer 89 Posted September 23 The point of the VCT is to advance and retard the cam's timing to suit various conditions. Advancing cam timing boosts torque at lower rpms. Retarding the camshaft at higher rpms boosts power. This allows the engine to make more usable power over a wider rpm range than the standard engine. Using larger duration and higher lift cam(s) would cause piston to valve interference when the VCT attempts to do it's job. If you are looking for a lot more power, just lock out the VCT sprocket and use the appropriate cam to suit your needs. Share this post Link to post Share on other sites
Stumps 312 Posted September 25 Thanks for the info. Looks like my engine will be a VCT in name only Share this post Link to post Share on other sites
Rod Racer 89 Posted September 25 7 hours ago, Stumps said: Thanks for the info. Looks like my engine will be a VCT in name only Like I said, have a chat with Crow Cams and/or Clive Cams, they might have grinds that are suitable to use with VCT. Share this post Link to post Share on other sites
Stumps 312 Posted September 25 Yeah, I contacted crow cams and their recommendation was to lock the cam and run a regular AU grind. 1 Rod Racer reacted to this Share this post Link to post Share on other sites
