71 Duster 360 turbo build
I had been worried about low oil pressure for quite some time which I discussed in another thread over in the Small Block Mopar sub forum. The general consensus was that my pressure is fine so I’ve moved forward with tuning, and now I’m running out of fuel and rpm! I hit 101% injector duty cycle at around 15 psi running 55% ethanol so I have bumped my base pressure from 40 to 55psi to gain some headroom. I am also running into what I believe is valve float around 5800rpm. Under boost the engine absolutely will not rev past 6000rpm. I’m running the supplied Speedmaster valvetrain so I have ordered higher rate valve springs in the hopes of alleviating the issue. I don’t know where power will drop off once I’m able to rev it, but I would like the ability to shift at 6500. The next track day is May 10th so I’m really hoping to get everything together and tuned by then.
I had been worried about low oil pressure for quite some time which I discussed in another thread over in the Small Block Mopar sub forum. The general consensus was that my pressure is fine so I’ve moved forward with tuning, and now I’m running out of fuel and rpm! I hit 101% injector duty cycle at around 15 psi running 55% ethanol so I have bumped my base pressure from 40 to 55psi to gain some headroom. I am also running into what I believe is valve float around 5800rpm. Under boost the engine absolutely will not rev past 6000rpm. I’m running the supplied Speedmaster valvetrain so I have ordered higher rate valve springs in the hopes of alleviating the issue. I don’t know where power will drop off once I’m able to rev it, but I would like the ability to shift at 6500. The next track day is May 10th so I’m really hoping to get everything together and tuned by then.
