Originally Posted by
stryfox
Thanks
When you leave the port open what do you do with the hose from the car plug it or leave it open to atmosphere?
I can try lower with it hooked up and higher with it disconnected tomorrow and observe some results.
Actually, I just looked and I have the port on the regulator capped (not that it would make much difference, capped or open ... unless I was experiencing radical elevation changes, I suppose ).
what to do with the hose coming from the car ?
not sure where that hose originates (as it would have been added), but in theory it is going to your intake plenum, SO it must be plugged/capped.
It would be worthwhile asking your tuner if he wants your fuel pressure referenced to manifold pressure (but my guess would be "no")
Are you datalogging your AFR or observing it on a meter? I find that while my AFR drops from about 13.5 to 11.3 or so as I go from 10 psi to (my max of) 19-20 psi ... it will often briefly fatten up to 10.4 (as the throttle shuts).
cheers,
Chris