Remote Tuning

shadow85

But I only just asked CJM this earlier today, and they said that aftermarket regulators are not designed to hold pressure after the pump is off. Some will hold pressure for a few moments and some will drop to 0 immediatly, and some might drop pressure halfway and take time to bleed the rest out.

jax4557

Exactly what he told me back when I needed info on my cjm setup, like I said mine will hold for a while but yours may not and if he says that's normal then that is ok.

Also, Seb had me set fuel pressure regulator to 52 psi with vacuum reference off, then when you connect it to the vacuum it will go to 42psi roughly. Every psi of boost will push back an extra pound of fuel pressure to combat the cylinder pressure to the injectors so you are always running 42psi. At least that is my setup.

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BP Precision 6766 - E85 - 620hp / 550tq

turtle64b

They are much more knowledgeable than I, no doubt, so if they say cool, then cool.

Your pressure drop-off coupled with the smell of fuel is what points me to a leak. When I started up the car for the first time after the install, the pressure gauge on the regulator was too loose. You could definitely smell the gas and pressure would drop off to zero in under a minute. After getting it all nice and tight and verifying the other joints, my pressure stays steady long after shutdown, which is why that just seems normal to me.

I went with the Fuelab regulator for my setup.