Ok so I finally got round to fitting the boost gauge (not done oil pressure yet) but I'm not sure if it works ok or if there's a problem with the motor. The gauge reads just off the bottom of the dial at idle and off throttle at 30 inHG and goes up to about 11 psi when I boot it in 3rd but the needle waggles about between 9 to 11 psi whilst being booted. I think I'm missing a couple of psi but the gauge may not be that accurate I suppose. Is the vac reading ok or should it not be as much as this?
Thanks for any info